Mitsubishi Electric TRANE NTXDKS09A112AA User manual
Air-Conditioners
NTXDKS09,12,15,18A112AA
English
INSTALLATION MANUAL
For safe and correct use, please read this installation manual thoroughly before installing the air-conditioner unit.
FOR INSTALLER
VN79D601H01_Cover.fm 1 ページ ２０１８年９月６日 木曜日 午前９時５１分
2
3
[Fig. 3-1]
4
[Fig. 4-1]
C
D
C
E
D
AUnit
BLifting machine
5
[Fig. 5-1] [Fig. 5-2]
ACenter of gravity
3.1
5.1
AAccess door
BElectrical parts box
CAir inlet
DAir outlet
ECeiling surface
FService space (viewed from the side)
GService space (viewed from the direction of arrow)
1600 mm [23-5/8 in] or more
2100 mm [3-15/16 in] or more
310 mm [13/32 in] or more
4300 mm [11-13/16 in] or more
B
C
D
A
F
G
3
4
E
A
50 ~ 150 [1-31/32 ~ 5-29/32]
450 [17-23/32]
450 [17-23/32]
49 [1-15/16] 625 [24-5/8]
777 [30-19/32]
20 [13/16]
23
[29/32]
C
B
A
D
B
E
200 [7-7/8]
1
2
90
[3-9/16]
57 [2-1/4]
YX
LW
A
Z
B
A
CNuts (field supplied)
DWashers (accessory)
EM10 hanging bolt (field supplied)
(Unit: mm [in])
(Unit: mm [in])
Model
NTXDKS09A112AA
NTXDKS12, 15A112AA
NTXDKS18A112AA
A
700 [27-9/16]
900 [35-7/16]
1100 [43-5/16]
B
752 [29-5/8]
952 [37-1/2]
1152 [45-3/8]
C
798 [31-7/16]
998 [39-5/16]
1198 [47-3/16]
D
660 [26]
860 [33-7/8]
1060 [41-3/4]
E
800 [31-1/2]
1000 [39-3/8]
1200 [47-1/4]
4.1
00_VN79D601H01_illust.p65 18.9.3, 13:352
3
6
øB
øA
a
b
[Fig. 6-1]
aIndoor unit
bOutdoor unit
ad
cb
ef
90°
d
c
b
a
b
a
a
b
e
b
c
d
c
A
c
b
a
defgh
i
[Fig. 6-9]
APipe cover (120 mm [3/4 in] small diameter) (accessory)
BCaution:
Pull out the thermal insulation on the refrigerant piping at the
site, insert the flare nut to flare the end, and reinsert the insu-
lation.
Take care to ensure that condensation does not form on ex-
posed copper piping.
CLiquid end of refrigerant piping
DGas end of refrigerant piping
ESite refrigerant piping
FMain body
GPipe cover (120 mm [3/4 in] large diameter)
(accessory)
HThermal insulation (field supplied)
IPull
JFlare nut
A
B
C
D
F
G
E
M
L
E
F
L
AG
H
H
KL
J
I
J
O
O
N
N
20
20
20
20
[Fig. 6-3]
[Fig. 6-6]
[Fig. 6-4] [Fig. 6-5]
aFlare nut
bCopper tube
aBurr
bCopper tube/pipe
cSpare reamer
dPipe cutter
[Fig. 6-7]
[Fig. 6-8]
aFlaring tool
bDie
cCopper tube
dFlare nut
eYo k e
aSmooth
bInside is shiny without
any scratches
cEven length
dToo much
eTilted
fScratch on
flared plane
gCracked
hUneven
iBad examples
KReturn to original position
LEnsure that there is no gap here
MPlate on main body
NTie band (accessory)
OEnsure that there is no gap here. Point joint upwards.
6.1
6.2
aCopper tubes
bGood example
cBad examples
dTilted
eUneven
fBurred
6.3
Model
NTXDKS09, 12A112AA
NTXDKS15A112AA
NTXDKS18A112AA
A
9.52 [3/8]
12.7 [1/2]
12.7 [1/2]
B
6.35 [1/4]
6.35 [1/4]
6.35 [1/4]
(Unit: mm [in])
00_VN79D601H01_illust.p65 18.9.3, 13:353
2
3
[Fig. 3-1]
4
[Fig. 4-1]
C
D
C
E
D
AUnit
BLifting machine
5
[Fig. 5-1] [Fig. 5-2]
ACenter of gravity
3.1
5.1
AAccess door
BElectrical parts box
CAir inlet
DAir outlet
ECeiling surface
FService space (viewed from the side)
GService space (viewed from the direction of arrow)
1600 mm [23-5/8 in] or more
2100 mm [3-15/16 in] or more
310 mm [13/32 in] or more
4300 mm [11-13/16 in] or more
B
C
D
A
F
G
3
4
E
A
50 ~ 150 [1-31/32 ~ 5-29/32]
450 [17-23/32]
450 [17-23/32]
49 [1-15/16] 625 [24-5/8]
777 [30-19/32]
20 [13/16]
23
[29/32]
C
B
A
D
B
E
200 [7-7/8]
1
2
90
[3-9/16]
57 [2-1/4]
YX
LW
A
Z
B
A
CNuts (field supplied)
DWashers (accessory)
EM10 hanging bolt (field supplied)
(Unit: mm [in])
(Unit: mm [in])
Model
NTXDKS09A112AA
NTXDKS12, 15A112AA
NTXDKS18A112AA
A
700 [27-9/16]
900 [35-7/16]
1100 [43-5/16]
B
752 [29-5/8]
952 [37-1/2]
1152 [45-3/8]
C
798 [31-7/16]
998 [39-5/16]
1198 [47-3/16]
D
660 [26]
860 [33-7/8]
1060 [41-3/4]
E
800 [31-1/2]
1000 [39-3/8]
1200 [47-1/4]
4.1
00_VN79D601H01_illust.p65 18.9.3, 13:352
3
6
øB
øA
a
b
[Fig. 6-1]
aIndoor unit
bOutdoor unit
ad
cb
ef
90°
d
c
b
a
b
a
a
b
e
b
c
d
c
A
c
b
a
defgh
i
[Fig. 6-9]
APipe cover (120 mm [3/4 in] small diameter) (accessory)
BCaution:
Pull out the thermal insulation on the refrigerant piping at the
site, insert the flare nut to flare the end, and reinsert the insu-
lation.
Take care to ensure that condensation does not form on ex-
posed copper piping.
CLiquid end of refrigerant piping
DGas end of refrigerant piping
ESite refrigerant piping
FMain body
GPipe cover (120 mm [3/4 in] large diameter)
(accessory)
HThermal insulation (field supplied)
IPull
JFlare nut
A
B
C
D
F
G
E
M
L
E
F
L
AG
H
H
KL
J
I
J
O
O
N
N
20
20
20
20
[Fig. 6-3]
[Fig. 6-6]
[Fig. 6-4] [Fig. 6-5]
aFlare nut
bCopper tube
aBurr
bCopper tube/pipe
cSpare reamer
dPipe cutter
[Fig. 6-7]
[Fig. 6-8]
aFlaring tool
bDie
cCopper tube
dFlare nut
eYo k e
aSmooth
bInside is shiny without
any scratches
cEven length
dToo much
eTilted
fScratch on
flared plane
gCracked
hUneven
iBad examples
KReturn to original position
LEnsure that there is no gap here
MPlate on main body
NTie band (accessory)
OEnsure that there is no gap here. Point joint upwards.
6.1
6.2
aCopper tubes
bGood example
cBad examples
dTilted
eUneven
fBurred
6.3
Model
NTXDKS09, 12A112AA
NTXDKS15A112AA
NTXDKS18A112AA
A
9.52 [3/8]
12.7 [1/2]
12.7 [1/2]
B
6.35 [1/4]
6.35 [1/4]
6.35 [1/4]
(Unit: mm [in])
00_VN79D601H01_illust.p65 18.9.3, 13:353
5
AIndoor unit
BOutdoor unit
CWired remote controller
DMain switch/fuse
EGround wire
FIndoor controller board
GRadio frequency interface for RF thermostat
8
[Fig. 8-1]
8.1
8.2
For Power supply
A
C
F
G
E
B
D
S3
S3 CN105
RED
S2
S1
S2S1
21
AUse conduit to keep the weight of the cable and external force from being applied to
the power supply terminal connector.
BIndoor/outdoor unit connecting cable
CConduit
DTerminal block box
EKnockout hole (for indoor/outdoor unit connecting cable)
FWasher (accessory)
GTensile force
HUse ordinary bushing
IWired remote controller cable or wiring for radio interface
ATe rminal block for indoor/outdoor unit connecting
BTe rminal block for wired remote controller
CIndoor/outdoor unit connecting cable
DWired remote controller cable
EIndoor controller board
FCN105 (RED/5P)
GWiring for radio interface
[Fig. 8-2-3] [Fig. 8-2-4]
ATerminal block box
BKnockout hole
CRemove
AScrew holding cover (2pcs)
BCover
[Fig. 8-2-1] [Fig. 8-2-2]
A
B
C
S3
S2
S1
A
E
D
G
C
B
F
A
B
7
[Fig. 7-1]
AAir inlet
BAir outlet
CAccess door
DCeiling
ECanvas duct
FAir filter
GInlet grille
F
G
E
DC
BA
A
A
B
G
F
DC
E
IC
H
00_VN79D601H01_illust.p65 18.9.3, 13:355
4
B
J
O
N
F
Max. 300 mm [11-13/16 in]
[Fig. 6-10]
Correct piping
Wrong piping
AInsulation (9 mm [3/8 in] or more)
BDownward slope (1/100 or more)
CSupport metal
KAir bleeder
LRaised
MOdor trap
Grouped piping
DO. D. ø32 mm [1-1/4 in] PVC TUBE
EMake it as large as possible. About 10 cm [3-15/16 in].
FIndoor unit
GMake the piping size large for grouped piping.
HDownward slope (1/100 or more)
IO. D. ø38 mm [1-1/2 in] PVC TUBE for grouped piping.
(9 mm [3/8 in] or more insulation)
JUp to 550 mm [21-21/32 in]
NDrain hose (accessory)
OHorizontal or slightly upward
[Fig.6-11]
C
B
A
L
D
DD
E
K
M
B
HI
Max. 20m [65 ft]
1.5-2 m [5 to 7 ft]
G
FFF
B
CDE E
H
G
KJ
F
I
A
25 [1] 25 [1]
35
[1-13/32]
AIndoor unit
BPipe cover (60 mm [3/8 in]) (accessory)
CTie band (accessory)
DVisible part
EInsertion margin
FDrain hose (accessory)
GDrain pipe (O.D. ø32 mm [1-1/4 in] PVC TUBE, field supplied)
HInsulating material (field supplied)
ITie band (accessory)
JMax.180 ± 5 mm [7-3/32 ± 7/32 in]
KNo gap. The joint section of the insulation material must meet at the top.
(Unit: mm [in])
[Fig. 6-13]
6.6
A
B
F
C
D
E
AInsert pump's end 2 to 4 cm [13/16 to 1-19/32 in].
BRemove the water supply port.
CAbout 2 liters
DWater
EFilling port
FScrew
[Fig. 6-14]
<Indoor board>
SWE
[Fig.6-12]
AIndoor unit
BPipe cover (30 mm [3/16 in]) (accessory)
CTie band (accessory)
DBand fixing part
EInsertion margin
FDrain hose (accessory)
GDrain pipe (O.D. ø32 PVC TUBE, field supplied)
HInsulating material (field supplied)
IMax.145 ± 5 mm
DEH
G
I
F
B
C
5 25
A
66.5
00_VN79D601H01_illust.p65 18.9.3, 13:354
5
AIndoor unit
BOutdoor unit
CWired remote controller
DMain switch/fuse
EGround wire
FIndoor controller board
GRadio frequency interface for RF thermostat
8
[Fig. 8-1]
8.1
8.2
For Power supply
A
C
F
G
E
B
D
S3
S3 CN105
RED
S2
S1
S2S1
21
AUse conduit to keep the weight of the cable and external force from being applied to
the power supply terminal connector.
BIndoor/outdoor unit connecting cable
CConduit
DTerminal block box
EKnockout hole (for indoor/outdoor unit connecting cable)
FWasher (accessory)
GTensile force
HUse ordinary bushing
IWired remote controller cable or wiring for radio interface
ATe rminal block for indoor/outdoor unit connecting
BTe rminal block for wired remote controller
CIndoor/outdoor unit connecting cable
DWired remote controller cable
EIndoor controller board
FCN105 (RED/5P)
GWiring for radio interface
[Fig. 8-2-3] [Fig. 8-2-4]
ATerminal block box
BKnockout hole
CRemove
AScrew holding cover (2pcs)
BCover
[Fig. 8-2-1] [Fig. 8-2-2]
A
B
C
S3
S2
S1
A
E
D
G
C
B
F
A
B
7
[Fig. 7-1]
AAir inlet
BAir outlet
CAccess door
DCeiling
ECanvas duct
FAir filter
GInlet grille
F
G
E
DC
BA
A
A
B
G
F
DC
E
IC
H
00_VN79D601H01_illust.p65 18.9.3, 13:355
4
B
J
O
N
F
Max. 300 mm [11-13/16 in]
[Fig. 6-10]
Correct piping
Wrong piping
AInsulation (9 mm [3/8 in] or more)
BDownward slope (1/100 or more)
CSupport metal
KAir bleeder
LRaised
MOdor trap
Grouped piping
DO. D. ø32 mm [1-1/4 in] PVC TUBE
EMake it as large as possible. About 10 cm [3-15/16 in].
FIndoor unit
GMake the piping size large for grouped piping.
HDownward slope (1/100 or more)
IO. D. ø38 mm [1-1/2 in] PVC TUBE for grouped piping.
(9 mm [3/8 in] or more insulation)
JUp to 550 mm [21-21/32 in]
NDrain hose (accessory)
OHorizontal or slightly upward
[Fig.6-11]
C
B
A
L
D
DD
E
K
M
B
HI
Max. 20m [65 ft]
1.5-2 m [5 to 7 ft]
G
FFF
B
CDE E
H
G
KJ
F
I
A
25 [1] 25 [1]
35
[1-13/32]
AIndoor unit
BPipe cover (60 mm [3/8 in]) (accessory)
CTie band (accessory)
DVisible part
EInsertion margin
FDrain hose (accessory)
GDrain pipe (O.D. ø32 mm [1-1/4 in] PVC TUBE, field supplied)
HInsulating material (field supplied)
ITie band (accessory)
JMax.180 ± 5 mm [7-3/32 ± 7/32 in]
KNo gap. The joint section of the insulation material must meet at the top.
(Unit: mm [in])
[Fig. 6-13]
6.6
A
B
F
C
D
E
AInsert pump's end 2 to 4 cm [13/16 to 1-19/32 in].
BRemove the water supply port.
CAbout 2 liters
DWater
EFilling port
FScrew
[Fig. 6-14]
<Indoor board>
SWE
[Fig.6-12]
AIndoor unit
BPipe cover (30 mm [3/16 in]) (accessory)
CTie band (accessory)
DBand fixing part
EInsertion margin
FDrain hose (accessory)
GDrain pipe (O.D. ø32 PVC TUBE, field supplied)
HInsulating material (field supplied)
IMax.145 ± 5 mm
DEH
G
I
F
B
C
5 25
A
66.5
00_VN79D601H01_illust.p65 18.9.3, 13:354
7
AHour button
BMinute button
CTEMP button
DTEMP button
EON/OFF button
FCHECK button
3
12
CHECK CHECK
CHECKCHECK
4
ON/OFF TEMP
FAN
VANE
TEST RUN
AUTO STOP
AUTO START
h
min
LOUVER
MODE
CHECK
RESETSET CLOCK
CHECK
E
F
D
C
A
B
8
[Fig. 8-6]
8.4
11
[Fig. 11-1]
B
A
G
H
K
L
M
I
J
C
D
E
F
AIndoor unit
BUnion
CLiquid pipe
DGas pipe
EStop valve
FOutdoor unit
GRefrigerant gas cylinder operating valve
HRefrigerant gas cylinder for R410A with
siphon
IRefrigerant (liquid)
JElectronic scale for refrigerant charging
KCharge hose (for R410A)
LGauge manifold valve (for R410A)
MService port
11.1
10
[Fig. 10-1] [Fig. 10-2] [Fig. 10-3]
F1 F2 F3 F4
Check menu
Cursor
Service menu:
Error history
Refrigerant volume check
Refrigerant leak check
Smooth maintenance
Request code
1
Smooth maintenance
Begin:
Smooth maintenance
Exit:
Ref.address
Stable mode
Cursor
Ref.address
Stable mode
Cool / Heat/ Normal
Address
Cool / Heat/ Normal
2
Smooth maintenance
Return:
Smooth maintenance
Return:
Smooth maintenance
Return:
Page
Page
Page
COMP. current
COMP. run time
COMP. On / Off
COMP. frequency
A
Hz
Hr
times
Hr
Ref. address
Cool
Ref.address
Cool
Ref.address
Cool
Sub cool
OU TH4 temp.
OU TH6 temp.
OU TH7 temp.
IU air temp.
IU HEX temp.
IU filter time
3
00_VN79D601H01_illust.p65 18.9.3, 13:357
6
ON/OFF TEMP
FAN
VANE
TEST RUN
AUTO STOP
AUTO START
h
min
LOUVER
MODE
CHECK
RESETSET CLOCK
CHECK
2,4
3
A
8
[Fig. 8-5-1]
8.2
8.4
[Fig. 8-3]
AIndoor terminal block
BGround wire (green/yellow)
CIndoor/outdoor unit connecting cable 3-
core 1.5 mm2[AWG 16] or more
DOutdoor terminal block
1Indoor/outdoor unit connecting cable 3-
core 1.5 mm2[AWG 16] or more, fol-
lowing Design 245 IEC 57.
2Indoor terminal block
3Outdoor terminal block
AIndoor terminal block 4Always install an ground wire (1-core 1.5 mm2
[AWG 16]) longer than other cables
5Wired remote controller cable
Wire No ×size (mm2) : Cable 2C ×0.3
Accessory wire of remote controller
(wire length : 10m [32 ft], non-polar. Max.500 m
[1640 ft])
6Wired remote controller
12
6
5
2
4
3
1
CIndoor/outdoor unit
connecting cable
3-core 1.5 mm2
[AWG 16] or more
DOutdoor terminal block
BGround wire (green/yellow)
[Fig. 8-4]
[Fig. 8-5-4]
8.3
F1 F2 F3 F4
Service menu
Cursor
Main menu:
Test run
Input maintenance info.
Function setting
Check
Self check
F1 F2 F3 F4
Function setting
Cursor Address
Monitor:
Ref. address
Unit No. Grp./1/2/3/4/All
F1 F2 F3 F4
Function setting
Cursor Cursor
Request:
Ref. address
Mode 1
Mode 2
Mode 3
Mode 4
Grp.
F1 F2 F3 F4
Function setting
Cursor Cursor
Request:
Ref. address
Mode 7
Mode 8
Mode 9
Mode10
Unit # 1
F1 F2 F3 F4
Function setting
Ref. address
Sending data
[Fig. 8-5-2]
[Fig. 8-5-5]
[Fig. 8-5-3]
00_VN79D601H01_illust.p65 18.9.3, 13:356
7
AHour button
BMinute button
CTEMP button
DTEMP button
EON/OFF button
FCHECK button
3
12
CHECK CHECK
CHECKCHECK
4
ON/OFF TEMP
FAN
VANE
TEST RUN
AUTO STOP
AUTO START
h
min
LOUVER
MODE
CHECK
RESETSET CLOCK
CHECK
E
F
D
C
A
B
8
[Fig. 8-6]
8.4
11
[Fig. 11-1]
B
A
G
H
K
L
M
I
J
C
D
E
F
AIndoor unit
BUnion
CLiquid pipe
DGas pipe
EStop valve
FOutdoor unit
GRefrigerant gas cylinder operating valve
HRefrigerant gas cylinder for R410A with
siphon
IRefrigerant (liquid)
JElectronic scale for refrigerant charging
KCharge hose (for R410A)
LGauge manifold valve (for R410A)
MService port
11.1
10
[Fig. 10-1] [Fig. 10-2] [Fig. 10-3]
F1 F2 F3 F4
Check menu
Cursor
Service menu:
Error history
Refrigerant volume check
Refrigerant leak check
Smooth maintenance
Request code
1
Smooth maintenance
Begin:
Smooth maintenance
Exit:
Ref.address
Stable mode
Cursor
Ref.address
Stable mode
Cool / Heat/ Normal
Address
Cool / Heat/ Normal
2
Smooth maintenance
Return:
Smooth maintenance
Return:
Smooth maintenance
Return:
Page
Page
Page
COMP. current
COMP. run time
COMP. On / Off
COMP. frequency
A
Hz
Hr
times
Hr
Ref. address
Cool
Ref.address
Cool
Ref.address
Cool
Sub cool
OU TH4 temp.
OU TH6 temp.
OU TH7 temp.
IU air temp.
IU HEX temp.
IU filter time
3
00_VN79D601H01_illust.p65 18.9.3, 13:357
6
ON/OFF TEMP
FAN
VANE
TEST RUN
AUTO STOP
AUTO START
h
min
LOUVER
MODE
CHECK
RESETSET CLOCK
CHECK
2,4
3
A
8
[Fig. 8-5-1]
8.2
8.4
[Fig. 8-3]
AIndoor terminal block
BGround wire (green/yellow)
CIndoor/outdoor unit connecting cable 3-
core 1.5 mm2[AWG 16] or more
DOutdoor terminal block
1Indoor/outdoor unit connecting cable 3-
core 1.5 mm2[AWG 16] or more, fol-
lowing Design 245 IEC 57.
2Indoor terminal block
3Outdoor terminal block
AIndoor terminal block 4Always install an ground wire (1-core 1.5 mm2
[AWG 16]) longer than other cables
5Wired remote controller cable
Wire No ×size (mm2) : Cable 2C ×0.3
Accessory wire of remote controller
(wire length : 10m [32 ft], non-polar. Max.500 m
[1640 ft])
6Wired remote controller
12
6
5
2
4
3
1
CIndoor/outdoor unit
connecting cable
3-core 1.5 mm2
[AWG 16] or more
DOutdoor terminal block
BGround wire (green/yellow)
[Fig. 8-4]
[Fig. 8-5-4]
8.3
F1 F2 F3 F4
Service menu
Cursor
Main menu:
Test run
Input maintenance info.
Function setting
Check
Self check
F1 F2 F3 F4
Function setting
Cursor Address
Monitor:
Ref. address
Unit No. Grp./1/2/3/4/All
F1 F2 F3 F4
Function setting
Cursor Cursor
Request:
Ref. address
Mode 1
Mode 2
Mode 3
Mode 4
Grp.
F1 F2 F3 F4
Function setting
Cursor Cursor
Request:
Ref. address
Mode 7
Mode 8
Mode 9
Mode10
Unit # 1
F1 F2 F3 F4
Function setting
Ref. address
Sending data
[Fig. 8-5-2]
[Fig. 8-5-5]
[Fig. 8-5-3]
00_VN79D601H01_illust.p65 18.9.3, 13:356
9
3. Selecting an installation site & accessories
•Select a site with sturdy fixed surface that is strong enough to support the weight of
unit.
•Before installing unit, the routing to carry in unit to the installation site should be
determined.
•Select a site where the unit is not affected by entering air.
•Select a site where the flow of supply and return air is not blocked.
•Select a site where refrigerant piping can easily be installed to the outside.
•Select a site which allows the supply air to be fully distributed in a room.
•Do not install unit at a site near a lot of oil or steam.
•Do not install unit at a site where combustible gas may generate, flow in, stagnate
or leak.
•Do not install unit at a site where there is equipment generating high frequency
waves (a high frequency wave welder for example).
•Do not install unit at a site where fire detector is located at the supply air side. (Fire
detector may operate erroneously due to the heated air supplied during heating
operation.)
•If there are chemicals in the area, such as chemical plants and hospitals, full inves-
tigation is required before installing unit. (The plastic components may be damaged
depending on the chemical product applied.)
•If the unit runs for long hours when the air above the ceiling is at high temperature/
high humidity (due point above 79 °F [26 °C]), condensation may be produced in
the indoor unit. Add insulation material (10-20 mm [13/32 to 13/16 in]) to the entire
surface of the indoor unit to avoid condensation.
3.1. Install the indoor unit on a ceiling strong enough
to sustain its weight
[Fig. 3-1] (P.2)
AAccess door BElectrical parts box
CAir inlet DAir outlet
ECeiling surface FService space (viewed from the side)
GService space (viewed from the direction of arrow)
1600 mm [23-5/8 in] or more 2100 mm [3-15/16 in] or more
310 mm [13/32 in] or more 4300 mm [11-13/16 in] or more
Warning:
The unit must be securely installed on a structure that can sustain its weight. If
the unit is mounted on an unstable structure, it may fall down, causing injuries.
3.2. Securing installation and service space
•Select the optimum direction of supply airflow according to the configuration of the
room and the installation position.
•As the piping and wiring are connected at the bottom and side surfaces, and the
maintenance is made at the same surfaces, allow a proper space properly. For the
efficient suspension work and safety, provide a space as much as possible.
3.3. Outdoor unit
Ventilation and service space
Units should be installed by licensed contractor accordingly to local code require-
ments.
For outdoor units to be connected, refer to the Installation Manual that comes with
the units.
3.4. Indoor unit accessories
The unit is provided with the following accessories:
ytitnauQemaN.oN
1
Pipe cover (for refrigerant piping joint) 120 mm [3/4 in] Small diameter
1
2
Pipe cover (for refrigerant piping joint) 120 mm [3/4 in] Large diameter
1
37dnabeiT
4W 8)gnignahrof(rehsa
51esohniarD
61]ni8/3[mm06)esohniarDrof(rev
ocepiP
71]ni61/3[mm03)esohniarDrof(revocepiP
8W 2)gniriwecruosrewoprof(rehsa
4. Fixing hanging bolts
4.1. Fixing hanging bolts
[Fig. 4-1] (P.2)
ACenter of gravity
Hanging structure
•Ceiling: The ceiling structure varies from building to one another. For detailed infor-
mation, consult the construction company.
5. Installing the unit
5.1. Hanging the unit
ss
ss
sTransport the indoor unit to the site in its original packing material.
ss
ss
sTo hang the indoor unit, use a lifting machine to lift and pass through the
hanging bolts.
[Fig. 5-1] (P.2)
AUnit
BLifting machine
[Fig. 5-2] (P.2)
CNuts (field supplied)
DWashers (accessory)
EM10 hanging bolt (field supplied)
5.2. Confirming the unit’s position and fixing hanging
bolts
ss
ss
sEnsure that the hanging bolt nuts are tightened to fix the hanging bolts.
ss
ss
sTo ensure that drain is discharged, be sure to hang the unit at level using a
level.
Caution:
Install the unit in horizontal position. If the side with drain port is installed
higher, water leakage may be caused.
Center of gravity and Product Weight
Model name
NTXDKS09A112AA
NTXDKS12A112AA
NTXDKS15A112AA
NTXDKS18A112AA
W (mm [in])
625 [24-5/8]
625 [24-5/8]
625 [24-5/8]
625 [24-5/8]
L (mm [in])
752 [29-5/8]
952 [37-1/2]
952 [37-1/2]
1152 [45-3/8]
X (mm [in])
263 [10-3/8]
286 [11-9/32]
280 [11-1/32]
285 [11-1/4]
Y (mm [in])
351 [13-27/32]
448 [17-21/32]
437 [17-7/32]
527 [20-3/4]
Z (mm [in])
106 [4-3/16]
104 [4-1/8]
104 [4-1/8]
104 [4-1/8]
Product Weight (kg [Ib])
19 [42]
22 [49]
23 [51]
26.5 [59]
•If necessary, reinforce the hanging bolts to protect against earthquakes.
*Use M10 for hanging bolts and reinforcements to protect against earthquake
(field supplied).
1Ceiling reinforcement (edge beam, etc.) must be required to keep the ceiling level
and to prevent it from vibrating.
2Cut and remove the ceiling beams.
3Reinforce the ceiling, and add other beams for fixing the ceiling boards.
10_VN79D601H01_en.p65 18.9.3, 13:369
8
Warning:
•Do not use refrigerant other than the type indicated in the manuals provided
with the unit and on the nameplate.
- Doing so may cause the unit or pipes to burst, or result in explosion or fire during
use, during repair, or at the time of disposal of the unit.
- It may also be in violation of applicable laws.
- MITSUBISHI ELECTRIC TRANE HVAC US LLC cannot be held responsible for
malfunctions or accidents resulting from the use of the wrong type of refrigerant.
•When handling this product, always wear protective equipment.
EG: Gloves, full arm protection namely boiler suit, and safety glasses.
- Improper handling may result in injury.
•Do not install it by yourself (customer).
Incomplete installation could cause injury due to fire, electric shock, the unit
falling or leakage of water. Consult the dealer from whom you purchased the
unit or special installer.
•Install the unit securely in a place which can bear the weight of the unit.
When installed in an insufficient strong place, the unit could fall causing in-
jured.
•Use the specified wires to connect the indoor and outdoor units securely and
attach the wires firmly to the terminal board connecting sections so the stress
of the wires is not applied to the sections.
Incomplete connecting and fixing could cause fire.
•Do not use intermediate connection of the power cord or the extension cord
and do not connect many devices to one AC outlet.
It could cause a fire or an electric shock due to defective contact, defective
insulation, exceeding the permissible current, etc.
•Check that the refrigerant gas does not leak after installation has completed.
•Perform the installation securely referring to the installation manual.
Incomplete installation could cause a personal injury due to fire, electric shock,
the unit falling or leakage of water.
•Perform electrical work according to the installation manual and be sure to
use an exclusive circuit.
If the capacity of the power circuit is insufficient or there is incomplete elec-
trical work, it could result in a fire or an electric shock.
•Attach the electrical part cover to the indoor unit and the service panel to the
outdoor unit securely.
If the electrical part cover in the indoor unit and/or the service panel in the
outdoor unit are not attached securely, it could result in a fire or an electric
shock due to dust, water, etc.
•Be sure to use the part provided or specified parts for the installation work.
The use of defective parts could cause an injury or leakage of water due to a
fire, an electric shock, the unit falling, etc.
•Ventilate the room if refrigerant leaks during operation.
If the refrigerant comes in contact with a flame, poisonous gases will be re-
leased.
1. Safety precautions
•Please report to or take consent by the supply authority before connection
to the system.
•Be sure to read “Safety precautions” before installing the air conditioner.
•Be sure to observe the cautions specified here as they include important
items related to safety.
•The indications and meanings are as follows.
Warning:
Could lead to death, serious injury, etc.
Caution:
Could lead to serious injury in particular environments when operated incor-
rectly.
•After reading this manual, be sure to keep it together with the instruction
manual in a handy place on the customer’s site.
Symbols put on the unit
: Indicates an action that must be avoided.
: Indicates that important instructions must be followed.
: Indicates a part which must be grounded.
: Indicates that caution should be taken with rotating parts.
: Indicates that the main switch must be turned off before servicing.
: Beware of electric shock.
: Beware of hot surface.
Warning:
Carefully read the labels affixed to the main unit.
Caution:
•Ground the unit.
Do not connect the ground wire to a gas pipe, water pipe arrester or telephone
ground wire. Defective grounding could cause an electric shock.
•Do not install the unit in a place where an inflammable gas leaks.
If gas leaks and accumulates in the area surrounding the unit, it could cause
an explosion.
•Take measures to prevent electrical leakage as required.
•Perform the drainage/piping work securely according to the installation
manual.
If there is a defect in the drainage/piping work, water could drop from the unit
and household goods could be wet and damaged.
•Fasten a flare nut with a torque wrench as specified in this manual.
When fastened too tight, a flare nut may broken after a long period and cause
a leakage of refrigerant.
2.2. Outdoor unit
•Where it is not exposed to strong wind.
•Where airflow is good and dustless.
•Where it is not exposed to rain and direct sunshine.
•Where neighbours are not annoyed by operation sound or hot air.
•Where rigid wall or support is available to prevent the increase of operation sound
or vibration.
•Where there is no risk of combustible gas leakage.
•When installing the unit at a high level, be sure to fix the unit legs.
•Where it is at least 3 m [10 ft] away from the antenna of TV set or radio. (Otherwise,
images would be disturbed or noise would be generated.)
•Install the unit horizontally.
Caution:
Avoid the following places for installation where air conditioner trouble is li-
able to occur.
•Where there is too much machine oil in the air.
•Salty environments as seaside areas.
•Hot-spring areas.
•Where sulfide gas exists.
•Other special atmospheric areas.
2. Selecting the installation location
2.1. Indoor unit
•Where airflow is not blocked.
•Where cool air spreads over the entire room.
•Where it is not exposed to direct sunshine.
•At a distance 1 m [39-3/8 in] or more away from a TV and radio (to prevent picture
from being distorted or sound from being generated).
•In a place as far away as possible from fluorescent and incandescent lights (so the
infrared remote control can operate the air conditioner normally).
•Where the air filter can be removed and replaced easily.
Warning:
Mount the indoor unit into a ceiling strong enough to withstand the weight of
the unit.
Contents
1. Safety precautions ................................................................................... 8
2. Selecting the installation location ............................................................. 8
3. Selecting an installation site & accessories ............................................. 9
4. Fixing hanging bolts ................................................................................. 9
5. Installing the unit ...................................................................................... 9
6. Refrigerant piping work .......................................................................... 10
7. Duct work ............................................................................................... 12
8. Electrical work ........................................................................................ 12
9. Test run .................................................................................................. 14
10. Easy maintenance function .................................................................... 17
11. Maintenance .......................................................................................... 17
10_VN79D601H01_en.p65 18.9.3, 13:368
9
3. Selecting an installation site & accessories
•Select a site with sturdy fixed surface that is strong enough to support the weight of
unit.
•Before installing unit, the routing to carry in unit to the installation site should be
determined.
•Select a site where the unit is not affected by entering air.
•Select a site where the flow of supply and return air is not blocked.
•Select a site where refrigerant piping can easily be installed to the outside.
•Select a site which allows the supply air to be fully distributed in a room.
•Do not install unit at a site near a lot of oil or steam.
•Do not install unit at a site where combustible gas may generate, flow in, stagnate
or leak.
•Do not install unit at a site where there is equipment generating high frequency
waves (a high frequency wave welder for example).
•Do not install unit at a site where fire detector is located at the supply air side. (Fire
detector may operate erroneously due to the heated air supplied during heating
operation.)
•If there are chemicals in the area, such as chemical plants and hospitals, full inves-
tigation is required before installing unit. (The plastic components may be damaged
depending on the chemical product applied.)
•If the unit runs for long hours when the air above the ceiling is at high temperature/
high humidity (due point above 79 °F [26 °C]), condensation may be produced in
the indoor unit. Add insulation material (10-20 mm [13/32 to 13/16 in]) to the entire
surface of the indoor unit to avoid condensation.
3.1. Install the indoor unit on a ceiling strong enough
to sustain its weight
[Fig. 3-1] (P.2)
AAccess door BElectrical parts box
CAir inlet DAir outlet
ECeiling surface FService space (viewed from the side)
GService space (viewed from the direction of arrow)
1600 mm [23-5/8 in] or more 2100 mm [3-15/16 in] or more
310 mm [13/32 in] or more 4300 mm [11-13/16 in] or more
Warning:
The unit must be securely installed on a structure that can sustain its weight. If
the unit is mounted on an unstable structure, it may fall down, causing injuries.
3.2. Securing installation and service space
•Select the optimum direction of supply airflow according to the configuration of the
room and the installation position.
•As the piping and wiring are connected at the bottom and side surfaces, and the
maintenance is made at the same surfaces, allow a proper space properly. For the
efficient suspension work and safety, provide a space as much as possible.
3.3. Outdoor unit
Ventilation and service space
Units should be installed by licensed contractor accordingly to local code require-
ments.
For outdoor units to be connected, refer to the Installation Manual that comes with
the units.
3.4. Indoor unit accessories
The unit is provided with the following accessories:
ytitnauQemaN.oN
1
Pipe cover (for refrigerant piping joint) 120 mm [3/4 in] Small diameter
1
2
Pipe cover (for refrigerant piping joint) 120 mm [3/4 in] Large diameter
1
37dnabeiT
4W 8)gnignahrof(rehsa
51esohniarD
61]ni8/3[mm06)esohniarDrof(rev
ocepiP
71]ni61/3[mm03)esohniarDrof(revocepiP
8W 2)gniriwecruosrewoprof(rehsa
4. Fixing hanging bolts
4.1. Fixing hanging bolts
[Fig. 4-1] (P.2)
ACenter of gravity
Hanging structure
•Ceiling: The ceiling structure varies from building to one another. For detailed infor-
mation, consult the construction company.
5. Installing the unit
5.1. Hanging the unit
ss
ss
sTransport the indoor unit to the site in its original packing material.
ss
ss
sTo hang the indoor unit, use a lifting machine to lift and pass through the
hanging bolts.
[Fig. 5-1] (P.2)
AUnit
BLifting machine
[Fig. 5-2] (P.2)
CNuts (field supplied)
DWashers (accessory)
EM10 hanging bolt (field supplied)
5.2. Confirming the unit’s position and fixing hanging
bolts
ss
ss
sEnsure that the hanging bolt nuts are tightened to fix the hanging bolts.
ss
ss
sTo ensure that drain is discharged, be sure to hang the unit at level using a
level.
Caution:
Install the unit in horizontal position. If the side with drain port is installed
higher, water leakage may be caused.
Center of gravity and Product Weight
Model name
NTXDKS09A112AA
NTXDKS12A112AA
NTXDKS15A112AA
NTXDKS18A112AA
W (mm [in])
625 [24-5/8]
625 [24-5/8]
625 [24-5/8]
625 [24-5/8]
L (mm [in])
752 [29-5/8]
952 [37-1/2]
952 [37-1/2]
1152 [45-3/8]
X (mm [in])
263 [10-3/8]
286 [11-9/32]
280 [11-1/32]
285 [11-1/4]
Y (mm [in])
351 [13-27/32]
448 [17-21/32]
437 [17-7/32]
527 [20-3/4]
Z (mm [in])
106 [4-3/16]
104 [4-1/8]
104 [4-1/8]
104 [4-1/8]
Product Weight (kg [Ib])
19 [42]
22 [49]
23 [51]
26.5 [59]
•If necessary, reinforce the hanging bolts to protect against earthquakes.
*Use M10 for hanging bolts and reinforcements to protect against earthquake
(field supplied).
1Ceiling reinforcement (edge beam, etc.) must be required to keep the ceiling level
and to prevent it from vibrating.
2Cut and remove the ceiling beams.
3Reinforce the ceiling, and add other beams for fixing the ceiling boards.
10_VN79D601H01_en.p65 18.9.3, 13:369
8
Warning:
•Do not use refrigerant other than the type indicated in the manuals provided
with the unit and on the nameplate.
- Doing so may cause the unit or pipes to burst, or result in explosion or fire during
use, during repair, or at the time of disposal of the unit.
- It may also be in violation of applicable laws.
- MITSUBISHI ELECTRIC TRANE HVAC US LLC cannot be held responsible for
malfunctions or accidents resulting from the use of the wrong type of refrigerant.
•When handling this product, always wear protective equipment.
EG: Gloves, full arm protection namely boiler suit, and safety glasses.
- Improper handling may result in injury.
•Do not install it by yourself (customer).
Incomplete installation could cause injury due to fire, electric shock, the unit
falling or leakage of water. Consult the dealer from whom you purchased the
unit or special installer.
•Install the unit securely in a place which can bear the weight of the unit.
When installed in an insufficient strong place, the unit could fall causing in-
jured.
•Use the specified wires to connect the indoor and outdoor units securely and
attach the wires firmly to the terminal board connecting sections so the stress
of the wires is not applied to the sections.
Incomplete connecting and fixing could cause fire.
•Do not use intermediate connection of the power cord or the extension cord
and do not connect many devices to one AC outlet.
It could cause a fire or an electric shock due to defective contact, defective
insulation, exceeding the permissible current, etc.
•Check that the refrigerant gas does not leak after installation has completed.
•Perform the installation securely referring to the installation manual.
Incomplete installation could cause a personal injury due to fire, electric shock,
the unit falling or leakage of water.
•Perform electrical work according to the installation manual and be sure to
use an exclusive circuit.
If the capacity of the power circuit is insufficient or there is incomplete elec-
trical work, it could result in a fire or an electric shock.
•Attach the electrical part cover to the indoor unit and the service panel to the
outdoor unit securely.
If the electrical part cover in the indoor unit and/or the service panel in the
outdoor unit are not attached securely, it could result in a fire or an electric
shock due to dust, water, etc.
•Be sure to use the part provided or specified parts for the installation work.
The use of defective parts could cause an injury or leakage of water due to a
fire, an electric shock, the unit falling, etc.
•Ventilate the room if refrigerant leaks during operation.
If the refrigerant comes in contact with a flame, poisonous gases will be re-
leased.
1. Safety precautions
•Please report to or take consent by the supply authority before connection
to the system.
•Be sure to read “Safety precautions” before installing the air conditioner.
•Be sure to observe the cautions specified here as they include important
items related to safety.
•The indications and meanings are as follows.
Warning:
Could lead to death, serious injury, etc.
Caution:
Could lead to serious injury in particular environments when operated incor-
rectly.
•After reading this manual, be sure to keep it together with the instruction
manual in a handy place on the customer’s site.
Symbols put on the unit
: Indicates an action that must be avoided.
: Indicates that important instructions must be followed.
: Indicates a part which must be grounded.
: Indicates that caution should be taken with rotating parts.
: Indicates that the main switch must be turned off before servicing.
: Beware of electric shock.
: Beware of hot surface.
Warning:
Carefully read the labels affixed to the main unit.
Caution:
•Ground the unit.
Do not connect the ground wire to a gas pipe, water pipe arrester or telephone
ground wire. Defective grounding could cause an electric shock.
•Do not install the unit in a place where an inflammable gas leaks.
If gas leaks and accumulates in the area surrounding the unit, it could cause
an explosion.
•Take measures to prevent electrical leakage as required.
•Perform the drainage/piping work securely according to the installation
manual.
If there is a defect in the drainage/piping work, water could drop from the unit
and household goods could be wet and damaged.
•Fasten a flare nut with a torque wrench as specified in this manual.
When fastened too tight, a flare nut may broken after a long period and cause
a leakage of refrigerant.
2.2. Outdoor unit
•Where it is not exposed to strong wind.
•Where airflow is good and dustless.
•Where it is not exposed to rain and direct sunshine.
•Where neighbours are not annoyed by operation sound or hot air.
•Where rigid wall or support is available to prevent the increase of operation sound
or vibration.
•Where there is no risk of combustible gas leakage.
•When installing the unit at a high level, be sure to fix the unit legs.
•Where it is at least 3 m [10 ft] away from the antenna of TV set or radio. (Otherwise,
images would be disturbed or noise would be generated.)
•Install the unit horizontally.
Caution:
Avoid the following places for installation where air conditioner trouble is li-
able to occur.
•Where there is too much machine oil in the air.
•Salty environments as seaside areas.
•Hot-spring areas.
•Where sulfide gas exists.
•Other special atmospheric areas.
2. Selecting the installation location
2.1. Indoor unit
•Where airflow is not blocked.
•Where cool air spreads over the entire room.
•Where it is not exposed to direct sunshine.
•At a distance 1 m [39-3/8 in] or more away from a TV and radio (to prevent picture
from being distorted or sound from being generated).
•In a place as far away as possible from fluorescent and incandescent lights (so the
infrared remote control can operate the air conditioner normally).
•Where the air filter can be removed and replaced easily.
Warning:
Mount the indoor unit into a ceiling strong enough to withstand the weight of
the unit.
Contents
1. Safety precautions ................................................................................... 8
2. Selecting the installation location ............................................................. 8
3. Selecting an installation site & accessories ............................................. 9
4. Fixing hanging bolts ................................................................................. 9
5. Installing the unit ...................................................................................... 9
6. Refrigerant piping work .......................................................................... 10
7. Duct work ............................................................................................... 12
8. Electrical work ........................................................................................ 12
9. Test run .................................................................................................. 14
10. Easy maintenance function .................................................................... 17
11. Maintenance .......................................................................................... 17
10_VN79D601H01_en.p65 18.9.3, 13:368
11
6. Refrigerant piping work
6.4. Purging procedures leak test
PURGING PROCEDURES
Connect the refrigerant pipes (both the liquid and gas pipes) between the indoor
and the outdoor units.
Remove the service port cap of the stop valve on the side of the outdoor unit gas pipe.
(The stop valve will not work in its initial state fresh out of the factory (totally closed
with cap on).)
Connect the gage manifold valve and the vacuum pump to the service port of the
stop valve on the gas pipe side of the outdoor unit.
Run the vacuum pump. (Vacuumize for more than 15 minutes.)
Check the vacuum with the gage manifold valve, then close the gage manifold valve,
and stop the vacuum pump.
Leave it as is for one or two minutes. Make sure the pointer of the gage manifold
valve remains in the same position. Confirm that the pressure gage show -0.101MPa
(-760 mmHg).
Pipe length :
7 m [23 ft] maximum
No gas charge is needed.
Pipe length exceeding 7 m [23 ft]
Charge the prescribed
amount of gas.
Remove the gage manifold valve quickly from the service port of the stop valve.
After refrigerant pipes are connected and evacuated, fully open all stop valves on
gas and liquid pipe sides.
Operating without fully opening lowers the performance and causes trouble.
Tighten the cap to the service port to obtain the initial status.
Retighten the cap
Leak test
Refrigerant pipe insulation
•After connecting refrigerant piping, insulate the joints (flared joints) with thermal
insulation tubing.
[Fig. 6-9] (P.3)
APipe cover (120 mm [3/4 in] small diameter) (accessory)
BCaution:
Pull out the thermal insulation on the refrigerant piping at the site, insert the flare nut to flare
the end, and reinsert the insulation.
Take care to ensure that condensation does not form on exposed copper piping.
CLiquid end of refrigerant piping
DGas end of refrigerant piping
ESite refrigerant piping
FMain body
GPipe cover (120 mm [3/4 in] large diameter) (accessory)
HThermal insulation (field supplied)
IPull
JFlare nut
KReturn to original position
LEnsure that there is no gap here
MPlate on main body
NTie band (accessory)
OEnsure that there is no gap here. Point joint upwards.
1. Remove and discard the rubber bung which is inserted in the end of the unit piping.
2.Flare the end of the refrigerant piping.
3.Remove the thermal insulation on the site refrigerant piping and replace the insula-
tion in its original position.
Cautions On Refrigerant Piping
ss
ss
sBe sure to use non-oxidized brazing for brazing to ensure that foreign mat-
ter or moisture do not enter into the pipe.
ss
ss
sBe sure to apply refrigerating machine oil over the flare connection seating
surface and tighten the connection using a double spanner.
ss
ss
sProvide a metal brace to support the refrigerant pipe so that no load is
imparted to the indoor unit end pipe. This metal brace should be provided
50 cm [19-11/16 in] away from the indoor unit’s flare connection.
*Close
*Open
Hexagonal wrench
Stop valve
*4 to 5 turns
Stop valve
(or the vacuum
pump with the
function to prevent
the back flow)
Gauge manifold
valve (for R410A)
Pressure gauge
(for R410A)
Compound pressure gauge
(for R410A)
-0.101MPa
(-760 mmHg)
Handle
Low
Handle High
Window
Charge hose
(for R410A)
Vacuum
pump
Adapter for
preventing the
back flow
Charge hose (for
R410A)
Service
port
Stop
valve
6.5. Drain piping work
•Ensure that the drain piping is downward (pitch of more than 1/100) to the outdoor
(discharge) side. Do not add a trap.
•Ensure that any cross drain piping is less than 20 m [65 ft] (excluding the differ-
ence of elevation). If the drain piping is long, add metal braces to prevent it from
shaking. Never provide an air vent pipe, otherwise drain may be ejected.
•Use a hard vinyl chloride pipe O.D. ø32 mm [1-1/4 in] for drain piping.
•Ensure that collected pipes are 10 cm [3-15/16 in] lower than the unit body’s drain
port.
•Do not provide any odor trap at the drain discharge port.
•Place the end of the drain piping in a position where odor is not generated.
•
Do not put the end of the drain piping in any drain where ionic gases are generated.
[Fig. 6-10] (P.4)
Correct piping
Wrong piping
AInsulation (9 mm [3/8 in] or more)
BDownward slope (1/100 or more)
CSupport metal
KAir bleeder
LRaised
MOdor trap
Grouped piping
DO. D. ø32 mm [1-1/4 in] PVC TUBE
EMake it as large as possible. About 10 cm [3-15/16 in].
FIndoor unit
GMake the piping size large for grouped piping.
HDownward slope (1/100 or more)
IO. D. ø38 mm [1-1/2 in] PVC TUBE for grouped piping.
(9 mm [3/8 in] or more insulation)
JUp to 550 mm [21-21/32 in]
NDrain hose (accessory)
OHorizontal or slightly upward
10_VN79D601H01_en.p65 18.9.3, 13:3611
10
6. Refrigerant piping work
6.1. Refrigerant pipe
[Fig. 6-1] (P.3)
aIndoor unit
bOutdoor unit
Refer to the outdoor unit Instruction Manual for restrictions on
the height difference between units and for the amount of additional refrigerant
charge.
Avoid the following places for installation where the air conditioner malfunction is
liable to occur.
•Where there is too much oil in the air such as for machines or cooking.
•Salty environments as seaside areas.
•Hot-spring areas.
•Where sulfide gas exists.
•Other special atmospheric areas.
•This unit has flared connections on both indoor and outdoor sides. (Fig. 6-1)
•Insulate both refrigerant and drainage piping completely to prevent condensation.
Piping preparation
•Refrigerant pipes 3, 5, 7, 10 and 15 m [5 ft] are available as optional items.
(1) The specifications of commercially available pipes.
(2) Ensure that the two refrigerant pipes are well insulated to prevent condensation.
(3) Refrigerant pipe bending radius must be 10 cm [3-15/16 in] or more.
Caution:
Use insulation of specified thickness. Excessive thickness prevents storage
behind the indoor unit and smaller thickness causes condensation.
6.2. Flaring work
•Main cause of gas leakage is defect in flaring work.
Carry out correct flaring work in the following procedure.
6.2.1. Cutting the pipes
[Fig. 6-3] (P.3)
aCopper tubes
bGood example
cBad examples
dTilted
eUneven
fBurred
•Use a pipe cutter cut the copper tube correctly.
6.2.2. Burr removal
[Fig. 6-4] (P.3)
aBurr
bCopper tube/pipe
cSpare reamer
dPipe cutter
•Completely remove all burrs from the cut section of pipe/tube.
•Point the end of the copper tube/pipe to downward direction as you remove burrs in
order to avoid burrs drop in the tubing.
6.2.3. Putting nut on
[Fig. 6-5] (P.3)
aFlare nut
bCopper tube
•Remove flare nuts attached to indoor and outdoor unit, then attach them on pipe/
tube after burr removal.
(not possible to attach them on after flaring work)
6.2.4. Flaring work
[Fig. 6-6] (P.3)
aFlaring tool
bDie
cCopper tube
dFlare nut
eYo k e
•Carry out flaring work using flaring tool as shown below.
Dimension
Pipe diameter A (mm [in])
(mm [in])
When the tool for R410A is used
B (mm [in])
Clutch type
6.35 [1/4] 0 to 0.5 [0 to 1/32] 9.1 [3/8]
9.52 [3/8] 0 to 0.5 [0 to 1/32] 13.2 [17/32]
12.7 [1/2] 0 to 0.5 [0 to 1/32] 16.6 [21/32]
15.88 [5/8] 0 to 0.5 [0 to 1/32] 19.7 [25/32]
Firmly hold copper tube in a die in the dimension shown in the table at above.
6.2.5. Check
[Fig. 6-7] (P.3)
aSmooth fScratch on flared plane
bInside is shiny without any scratches gCracked
cEven length hUneven
dToo much iBad examples
eTilted
•If flare is defective, cut off the flared section and repeat.
6.3. Pipe connection
[Fig. 6-8] (P.3)
•Apply a thin coat of refrigeration oil on the surface of pipe.
•When connecting, first align the center, then tighten the flare nut 3 to 4 turns.
•Use tightening torque table below as a guideline for indoor unit side union joint section,
and tighten using two wrenches. Excessive tightening damages the flare section.
Copper pipe O.D. Flare nut O.D. Tightening torque
(mm [in]) (mm [in]) (N·m)
ø6.35 [1/4] 17 [11/16] 14 - 18
ø9.52 [3/8] 22 [7/8] 34 - 42
ø12.7 [1/2] 26 [1-1/32] 49 - 61
ø15.88 [5/8] 29 [1-5/32] 68 - 82
Warning:
Be careful of removing the flare nut! (Internally pressurize can cause them to
burst off.)
Remove the flare nut as follows:
1. Loosen the nut until you hear a hissing noise.
2. Do not remove the nut until the gas has been completely released (i.e., hiss-
ing noise stops).
3. Check that the gas has been completely released, and then remove the nut.
Outdoor unit connection
Connect pipes to stop valve pipe joint of the outdoor unit following the same proce-
dure as the indoor unit.
•For tightening, use a torque wrench or spanner, and use the same tightening torque
procedure for indoor unit.
+0
-0.4 [-1/32]
Pipe
For liquid
For gas
For liquid
For gas
For liquid
For gas
For liquid
For gas
Outside diameter
mm inch
6.35 1/4
9.52 3/8
6.35 1/4
9.52 3/8
6.35 1/4
12.7 1/2
6.35 1/4
12.7 5/8
Model
NTXDKS
09A112AA
NTXDKS
12A112AA
NTXDKS
15A112AA
NTXDKS
18A112AA
Insulation
material
Heat-resistant
foam plastic,
0.045 specific
gravity
Insulation
thickness
8 mm [11/32 in]
8 mm [11/32 in]
8 mm [11/32 in]
8 mm [11/32 in]
8 mm [11/32 in]
8 mm [11/32 in]
8 mm [11/32 in]
8 mm [11/32 in]
Min wall
thickness
0.8 mm [1/16 in]
0.8 mm [1/16 in]
0.8 mm [1/16 in]
0.8 mm [1/16 in]
0.8 mm [1/16 in]
0.8 mm [1/16 in]
0.8 mm [1/16 in]
1.0 mm [1/16 in]
10_VN79D601H01_en.p65 18.9.3, 13:3610
11
6. Refrigerant piping work
6.4. Purging procedures leak test
PURGING PROCEDURES
Connect the refrigerant pipes (both the liquid and gas pipes) between the indoor
and the outdoor units.
Remove the service port cap of the stop valve on the side of the outdoor unit gas pipe.
(The stop valve will not work in its initial state fresh out of the factory (totally closed
with cap on).)
Connect the gage manifold valve and the vacuum pump to the service port of the
stop valve on the gas pipe side of the outdoor unit.
Run the vacuum pump. (Vacuumize for more than 15 minutes.)
Check the vacuum with the gage manifold valve, then close the gage manifold valve,
and stop the vacuum pump.
Leave it as is for one or two minutes. Make sure the pointer of the gage manifold
valve remains in the same position. Confirm that the pressure gage show -0.101MPa
(-760 mmHg).
Pipe length :
7 m [23 ft] maximum
No gas charge is needed.
Pipe length exceeding 7 m [23 ft]
Charge the prescribed
amount of gas.
Remove the gage manifold valve quickly from the service port of the stop valve.
After refrigerant pipes are connected and evacuated, fully open all stop valves on
gas and liquid pipe sides.
Operating without fully opening lowers the performance and causes trouble.
Tighten the cap to the service port to obtain the initial status.
Retighten the cap
Leak test
Refrigerant pipe insulation
•After connecting refrigerant piping, insulate the joints (flared joints) with thermal
insulation tubing.
[Fig. 6-9] (P.3)
APipe cover (120 mm [3/4 in] small diameter) (accessory)
BCaution:
Pull out the thermal insulation on the refrigerant piping at the site, insert the flare nut to flare
the end, and reinsert the insulation.
Take care to ensure that condensation does not form on exposed copper piping.
CLiquid end of refrigerant piping
DGas end of refrigerant piping
ESite refrigerant piping
FMain body
GPipe cover (120 mm [3/4 in] large diameter) (accessory)
HThermal insulation (field supplied)
IPull
JFlare nut
KReturn to original position
LEnsure that there is no gap here
MPlate on main body
NTie band (accessory)
OEnsure that there is no gap here. Point joint upwards.
1. Remove and discard the rubber bung which is inserted in the end of the unit piping.
2.Flare the end of the refrigerant piping.
3.Remove the thermal insulation on the site refrigerant piping and replace the insula-
tion in its original position.
Cautions On Refrigerant Piping
ss
ss
sBe sure to use non-oxidized brazing for brazing to ensure that foreign mat-
ter or moisture do not enter into the pipe.
ss
ss
sBe sure to apply refrigerating machine oil over the flare connection seating
surface and tighten the connection using a double spanner.
ss
ss
sProvide a metal brace to support the refrigerant pipe so that no load is
imparted to the indoor unit end pipe. This metal brace should be provided
50 cm [19-11/16 in] away from the indoor unit’s flare connection.
*Close
*Open
Hexagonal wrench
Stop valve
*4 to 5 turns
Stop valve
(or the vacuum
pump with the
function to prevent
the back flow)
Gauge manifold
valve (for R410A)
Pressure gauge
(for R410A)
Compound pressure gauge
(for R410A)
-0.101MPa
(-760 mmHg)
Handle
Low
Handle High
Window
Charge hose
(for R410A)
Vacuum
pump
Adapter for
preventing the
back flow
Charge hose (for
R410A)
Service
port
Stop
valve
6.5. Drain piping work
•Ensure that the drain piping is downward (pitch of more than 1/100) to the outdoor
(discharge) side. Do not add a trap.
•Ensure that any cross drain piping is less than 20 m [65 ft] (excluding the differ-
ence of elevation). If the drain piping is long, add metal braces to prevent it from
shaking. Never provide an air vent pipe, otherwise drain may be ejected.
•Use a hard vinyl chloride pipe O.D. ø32 mm [1-1/4 in] for drain piping.
•Ensure that collected pipes are 10 cm [3-15/16 in] lower than the unit body’s drain
port.
•Do not provide any odor trap at the drain discharge port.
•Place the end of the drain piping in a position where odor is not generated.
•
Do not put the end of the drain piping in any drain where ionic gases are generated.
[Fig. 6-10] (P.4)
Correct piping
Wrong piping
AInsulation (9 mm [3/8 in] or more)
BDownward slope (1/100 or more)
CSupport metal
KAir bleeder
LRaised
MOdor trap
Grouped piping
DO. D. ø32 mm [1-1/4 in] PVC TUBE
EMake it as large as possible. About 10 cm [3-15/16 in].
FIndoor unit
GMake the piping size large for grouped piping.
HDownward slope (1/100 or more)
IO. D. ø38 mm [1-1/2 in] PVC TUBE for grouped piping.
(9 mm [3/8 in] or more insulation)
JUp to 550 mm [21-21/32 in]
NDrain hose (accessory)
OHorizontal or slightly upward
10_VN79D601H01_en.p65 18.9.3, 13:3611
10
6. Refrigerant piping work
6.1. Refrigerant pipe
[Fig. 6-1] (P.3)
aIndoor unit
bOutdoor unit
Refer to the outdoor unit Instruction Manual for restrictions on
the height difference between units and for the amount of additional refrigerant
charge.
Avoid the following places for installation where the air conditioner malfunction is
liable to occur.
•Where there is too much oil in the air such as for machines or cooking.
•Salty environments as seaside areas.
•Hot-spring areas.
•Where sulfide gas exists.
•Other special atmospheric areas.
•This unit has flared connections on both indoor and outdoor sides. (Fig. 6-1)
•Insulate both refrigerant and drainage piping completely to prevent condensation.
Piping preparation
•Refrigerant pipes 3, 5, 7, 10 and 15 m [5 ft] are available as optional items.
(1) The specifications of commercially available pipes.
(2) Ensure that the two refrigerant pipes are well insulated to prevent condensation.
(3) Refrigerant pipe bending radius must be 10 cm [3-15/16 in] or more.
Caution:
Use insulation of specified thickness. Excessive thickness prevents storage
behind the indoor unit and smaller thickness causes condensation.
6.2. Flaring work
•Main cause of gas leakage is defect in flaring work.
Carry out correct flaring work in the following procedure.
6.2.1. Cutting the pipes
[Fig. 6-3] (P.3)
aCopper tubes
bGood example
cBad examples
dTilted
eUneven
fBurred
•Use a pipe cutter cut the copper tube correctly.
6.2.2. Burr removal
[Fig. 6-4] (P.3)
aBurr
bCopper tube/pipe
cSpare reamer
dPipe cutter
•Completely remove all burrs from the cut section of pipe/tube.
•Point the end of the copper tube/pipe to downward direction as you remove burrs in
order to avoid burrs drop in the tubing.
6.2.3. Putting nut on
[Fig. 6-5] (P.3)
aFlare nut
bCopper tube
•Remove flare nuts attached to indoor and outdoor unit, then attach them on pipe/
tube after burr removal.
(not possible to attach them on after flaring work)
6.2.4. Flaring work
[Fig. 6-6] (P.3)
aFlaring tool
bDie
cCopper tube
dFlare nut
eYo k e
•Carry out flaring work using flaring tool as shown below.
Dimension
Pipe diameter A (mm [in])
(mm [in])
When the tool for R410A is used
B (mm [in])
Clutch type
6.35 [1/4] 0 to 0.5 [0 to 1/32] 9.1 [3/8]
9.52 [3/8] 0 to 0.5 [0 to 1/32] 13.2 [17/32]
12.7 [1/2] 0 to 0.5 [0 to 1/32] 16.6 [21/32]
15.88 [5/8] 0 to 0.5 [0 to 1/32] 19.7 [25/32]
Firmly hold copper tube in a die in the dimension shown in the table at above.
6.2.5. Check
[Fig. 6-7] (P.3)
aSmooth fScratch on flared plane
bInside is shiny without any scratches gCracked
cEven length hUneven
dToo much iBad examples
eTilted
•If flare is defective, cut off the flared section and repeat.
6.3. Pipe connection
[Fig. 6-8] (P.3)
•Apply a thin coat of refrigeration oil on the surface of pipe.
•When connecting, first align the center, then tighten the flare nut 3 to 4 turns.
•Use tightening torque table below as a guideline for indoor unit side union joint section,
and tighten using two wrenches. Excessive tightening damages the flare section.
Copper pipe O.D. Flare nut O.D. Tightening torque
(mm [in]) (mm [in]) (N·m)
ø6.35 [1/4] 17 [11/16] 14 - 18
ø9.52 [3/8] 22 [7/8] 34 - 42
ø12.7 [1/2] 26 [1-1/32] 49 - 61
ø15.88 [5/8] 29 [1-5/32] 68 - 82
Warning:
Be careful of removing the flare nut! (Internally pressurize can cause them to
burst off.)
Remove the flare nut as follows:
1. Loosen the nut until you hear a hissing noise.
2. Do not remove the nut until the gas has been completely released (i.e., hiss-
ing noise stops).
3. Check that the gas has been completely released, and then remove the nut.
Outdoor unit connection
Connect pipes to stop valve pipe joint of the outdoor unit following the same proce-
dure as the indoor unit.
•For tightening, use a torque wrench or spanner, and use the same tightening torque
procedure for indoor unit.
+0
-0.4 [-1/32]
Pipe
For liquid
For gas
For liquid
For gas
For liquid
For gas
For liquid
For gas
Outside diameter
mm inch
6.35 1/4
9.52 3/8
6.35 1/4
9.52 3/8
6.35 1/4
12.7 1/2
6.35 1/4
12.7 5/8
Model
NTXDKS
09A112AA
NTXDKS
12A112AA
NTXDKS
15A112AA
NTXDKS
18A112AA
Insulation
material
Heat-resistant
foam plastic,
0.045 specific
gravity
Insulation
thickness
8 mm [11/32 in]
8 mm [11/32 in]
8 mm [11/32 in]
8 mm [11/32 in]
8 mm [11/32 in]
8 mm [11/32 in]
8 mm [11/32 in]
8 mm [11/32 in]
Min wall
thickness
0.8 mm [1/16 in]
0.8 mm [1/16 in]
0.8 mm [1/16 in]
0.8 mm [1/16 in]
0.8 mm [1/16 in]
0.8 mm [1/16 in]
0.8 mm [1/16 in]
1.0 mm [1/16 in]
10_VN79D601H01_en.p65 18.9.3, 13:3610
13
8.4. Function settings
Refer to the manual that came with the remote controller for setting procedure and
operation method.
8.4.1 For wired remote controller
11
11
1[Fig. 8-5-1] (P.6)
•Select “Service” from the Main menu, and press the [SELECT] button.
•Select “Function setting” with the [F1] or [F2] button, and press the [SELECT]
button.
22
22
2[Fig. 8-5-2] (P.6)
•Set the indoor unit refrigerant addresses and unit numbers with the [F1] through
[F4] buttons, and then press the [SELECT] button to confirm the current setting.
<Checking the Indoor unit No.>
When the [SELECT] button is pressed, the target indoor unit will start fan operation.
If the unit is common or when running all units, all indoor units for the selected
refrigerant address will start fan operation.
33
33
3[Fig. 8-5-3] (P.6)
•When data collection from the indoor units is completed, the current settings
appears highlighted. Non-highlighted items indicate that no function settings
are made. Screen appearance varies depending on the “Unit No.” setting.
44
44
4[Fig. 8-5-4] (P.6)
•Use the [F1] or [F2] button to move the cursor to select the mode number, and
change the setting number with the [F3] or [F4] button.
55
55
5[Fig. 8-5-5] (P.6)
•When the settings are completed, press the [SELECT] button to send the set-
ting data from the remote controller to the indoor units.
•When the transmission is successfully completed, the screen will return to the
Function setting screen.
1) For IR wireless remote controller [Fig. 8-6] (P.7)
1. Changing the external static pressure setting.
•Be sure to change the external static pressure setting depending on the duct and
the grill used.
1Go to the function select mode
Press the CHECK button F twice continuously.
(Start this operation from the status of remote controller display turned off.)
CHECK
is lighted and “00” blinks.
Press the TEMP button Conce to set “50”. Direct the wireless remote controller
toward the receiver of the indoor unit and press the Hour button A.
2Setting the unit number
Press the TEMP button C and Dto set the unit number to 01-04 or 07. Direct the
wireless remote controller toward the receiver of the indoor unit and press the
Minute button B.
3Selecting a mode
Enter 08 to change the external static pressure setting using the C and D but-
tons.
Direct the wireless remote controller toward the receiver of the indoor unit and
press the Hour button A.
Current setting number: 1 = 1 beep (one second)
2 = 2 beeps (one second each)
3 = 3 beeps (one second each)
4Selecting the setting number
Use the C and Dbuttons to change the external static pressure setting to be
used.
Direct the wireless remote controller toward the sensor of the indoor unit and
press the Hour button A.
5To set the external static pressure
Repeat steps 3and 4to set the mode number to 10.
6Complete function selection
Direct the wireless remote controller toward the sensor of the indoor unit and
press the ON/OFF button E.
[Fig. 8-2-1] (P.5)
AScrew holding cover (2pcs)
BCover
[Fig. 8-2-2] (P.5)
ATerminal block box
BKnockout hole
CRemove
[Fig. 8-2-3] (P.5)
AUse conduit to keep the weight of the cable and external force from being applied to the
power supply terminal connector.
BIndoor/outdoor unit connecting cable
CConduit
DTerminal block box
EKnockout hole (for indoor/outdoor unit connecting cable)
FWasher (accessory)
GTensile force
HUse ordinary bushing
IWired remote controller cable or wiring for radio interface
[Fig. 8-2-4] (P.5)
ATerminal block for indoor/outdoor unit connecting
BTerminal block for wired remote controller
CIndoor/outdoor unit connecting cable
DWired remote controller cable
EIndoor controller board
FCN105 (RED/5P)
GWiring for radio interface
[Fig. 8-3] (P.6)
AIndoor terminal block
BGround wire (green/yellow)
CIndoor/outdoor unit connecting cable 3-core 1.5 mm2[AWG 16] or more
DOutdoor terminal block
1Indoor/outdoor unit connecting cable 3-core 1.5 mm2[AWG 16] or more, following Design
245 IEC 57.
2Indoor terminal block
3Outdoor terminal block
4Always install an ground wire (1-core 1.5 mm2[AWG 16]) longer than other cables
5Wired remote controller cable
Wire No ×size (mm2) : Cable 2C ×0.3
Accessory wire of remote controller
(wire length : 10 m [32 ft], non-polar. Max. 500 m [1640 ft])
6Wired remote controller
•Perform wiring as shown in [Fig. 8-3] (P.6). (Procure the cable locally.)
Make sure to use cables of the correct polarity only.
•Connect the terminal blocks as shown in [Fig. 8-3] (P.6).
Caution:
•Conduct electrical work properly.
•Firmly tighten the terminal screws to prevent them from loosening.
•After tightening, pull the wires lightly to confirm that they do not move.
8.3. Remote controller
8.3.1. For wired remote controller
1) Installing procedures
Refer to the installation manual that comes with each remote controller for details.
2) Function selection of remote controller
If two wired remote controllers are connected, set one to “Main” and the other to
“Sub”. For setting procedures, refer to “Function selection of remote controller” in the
operation manual for the indoor unit.
8.3.2. For IR wireless remote controller
1) Installation area
•Area in which the IR wireless remote controller is not exposed to direct sunshine.
•Area in which there is no near by heating source.
•Area in which the IR wireless remote controller is not exposed to cold (or hot) winds.
•Area in which the IR wireless remote controller can be operated easily.
•Area in which the IR wireless remote controller is beyond the reach of children.
* The signal can travel up to approximately 7 meters [23 ft] (in a streight line) within 45
degrees to both right and left of the center line of the receiver.
2) Setting the Model No.
[Fig. 8-4] (P.6)
1Insert batteries.
2Press the SET button with something sharp at the end.
Start this operation from the status of IR wireless remote controller display
turned off.
MODEL SELECT
blinks and Model No. is lighted.
3Press the temp button to set the Model No.
4Press the SET button with something sharp at the end.
MODEL SELECT
and Model No. are lighted for three seconds, then turned off.
8. Electrical work
Indoor Unit Model A Model No.
NTXDKS·A112AA 026
10_VN79D601H01_en.p65 18.9.3, 13:3613
12
6.6. Confirming drain discharge
ss
ss
sMake sure that the drain-up mechanism operates normally for discharge
and that there is no water leakage from the connections.
•Be sure to confirm the above when in heating operation.
•Be sure to confirm the above before ceiling work is done in the case of a new
construction.
1. Remove the water supply port cover on the same side as the indoor unit piping.
2. Fill water into the feed water pump using a feed water tank. Be sure to put the end
of the pump or tank in a drain pan. (If the insertion is incomplete, water may flow
over the machine.)
3. Perform the test run in cooling mode, or turn on the switch SWE on the controller
circuit board. (The drain pump and the fan are forced to operate without any re-
mote controller operation.) Make sure using a transparent hose that drain is dis-
charged.
4. After confirmation, cancel the test run mode, and turn off the main power. When
the switch SWE has been turned on, turn it off, and attach the water supply port
cover into its original position.
[Fig. 6-13] (P.4)
AInsert pump's end 2 to 4 cm [13/16 to 1-19/32 in].
BRemove the water supply port.
CAbout 2 liters
DWater
EFilling port
FScrew
[Fig. 6-14] (P.4)
<Indoor board>
6. Refrigerant piping work
[Drainage by gravity]
1. Insert the drain hose (accessory) into the drain port.
(The drain hose must not be bent more than 45° to prevent the hose from breaking
or clogging.)
The connecting part between the indoor unit and the drain hose may be discon-
nected at the maintenance. Fix the part with the accessory band, not be adhered.
2. Attach the drain pipe (O.D. ø32 PVC TUBE, field supplied).
(Attach the pipe with glue for the hard vinyl chloride pipe, and fix it with the band
(accessory).)
3. Perform insulation work on the drain pipe (O.D. ø32 PVC TUBE) and on the socket
(including elbow).
[Fig. 6-12] (P.4) * Drainage by gravity
AIndoor unit
BPipe cover (30 mm [3/16 in]) (accessory)
CTie band (accessory)
DBand fixing part
EInsertion margin
FDrain hose (accessory)
GDrain pipe (O.D. ø32 PVC TUBE, field supplied)
HInsulating material (field supplied)
IMax. 145 ± 5 mm
8.1. Power supply
Electrical specification Input capacity Main Switch/Fuse (A)
Power supply NTXDKS09, 12A112AA NTXDKS15, 18A112AA
(1 phase ~/N, 208/230V, 60Hz)
10 20
Warning:
•The compressor will not operate unless the power supply phase connection
is correct.
•The connection wiring between the outdoor and indoor units can be extended
up to a maximum of 50 m [164 ft], and the total extension including the crosso-
ver wiring between rooms is a maximum of 80 m [262 ft].
Provide switch with at least 3 mm [1/8 in] contact separation in each pole.
* Label each breaker according to purpose (heater, unit etc.).
[Fig. 8-1] (P.5)
AIndoor unit BOutdoor unit
CWired remote controller DMain switch/fuse
EGround wire FIndoor controller board
GRadio frequency interface for RF thermostat
8.2. Indoor wire connection
Work procedure
1. Remove two screws to detach the electric component cover.
2. Route each cable through the wiring intake into the electric component box. (Pro-
cure power cable and in-out connecting cable locally and use wired remote control
cable supplied with the unit.)
3. Securely connect the power cable and the in-out connecting cable and the wired
remote control cable to the terminal blocks.
4. For radio frequency interface
Connect the electric wires securely to the CN105 (RED) of indoor controller board.
Connect the electric wires securely to the corresponding terminals.
5. Secure the cables with clamps inside the electric component box.
6. Reattach the electric component cover.
•Attach power supply cable and indoor/outdoor cable to control box by using buffer
bushing for tensile force. (PG connection or the like.)
Warning:
•Attach the electrical part cover securely. If it is attached incorrectly, it could
result in a fire or electric shock due to dust, water, etc.
•Use the specified indoor/outdoor unit connecting wire to connect the indoor
and outdoor units. Attach the wire to the terminal block securely so that stress
is not applied to the terminal block connection. Incomplete connection or
fixing of the wire could result in a fire.
8. Electrical work
SWE SWE
ONOFF
connector
ONOFF
<ON> <OFF>
SWE SWE
ONOFF
connector
ONOFF
<OFF> <ON>
7. Duct work
•When connecting ducts, insert a canvas duct between the main body and the duct.
•Use non-combustible duct components.
Caution:
•The sound from the intake will increase dramatically if intake AA
AA
Ais fitted
directly beneath the main body. Intake AA
AA
Ashould therefore be installed as
far away from the main body as possible.
Particular care is required when using it with bottom inlet specifications.
•Install sufficient thermal insulation to prevent condensation forming on
outlet duct flanges and outlet ducts.
•To connect the air conditioner main body and the duct for potential equali-
zation.
•The distance between the inlet grille and the fan should be at least over 850
mm [33-15/32 in] or more.
If it is less than 850 mm [33-15/32 in], install a safety guard so the fan can-
not be easily accessed.
[Fig. 7-1] (P.5)
AAir inlet
BAir outlet
CAccess door
DCeiling
ECanvas duct
FAir filter
GInlet grille
1. Insert the drain hose (accessory) into the drain port (insertion margin: 25 mm
[1 in]).
(The drain hose must not be bent more than 45° to prevent the hose from break-
ing or clogging.)
(Attach the hose with glue for the hard vinyl chloride pipe, and fix it with the band
(accessory).)
2. Attach the drain pipe (O.D. ø32 mm [1-1/4 in] PVC TUBE, field supplied).
(Attach the pipe with glue for the hard vinyl chloride pipe, and fix it with the band
(accessory).)
3. Perform insulation work on the drain pipe (O.D. ø32 mm [1-1/4 in] PVC TUBE)
and on the socket (including elbow).
4. Check the drainage. (Refer to [Fig. 6-13])
5. Attach the insulating material (accessory), and fix it with the band (accessory) to
insulate the drain port.
[Fig. 6-11] (P.4)
AIndoor unit
BPipe cover (60 mm [3/8 in]) (accessory)
CTie band (accessory)
DVisible part
EInsertion margin
FDrain hose (accessory)
GDrain pipe (O.D. ø32 mm [1-1/4 in] PVC TUBE, field supplied)
HInsulating material (field supplied)
ITie band (accessory)
JMax.180 ± 5 mm [7-3/32 ± 7/32 in]
KNo gap. The joint of the insulation material must meet at the top.
10_VN79D601H01_en.p65 18.9.3, 13:3612
13
8.4. Function settings
Refer to the manual that came with the remote controller for setting procedure and
operation method.
8.4.1 For wired remote controller
11
11
1[Fig. 8-5-1] (P.6)
•Select “Service” from the Main menu, and press the [SELECT] button.
•Select “Function setting” with the [F1] or [F2] button, and press the [SELECT]
button.
22
22
2[Fig. 8-5-2] (P.6)
•Set the indoor unit refrigerant addresses and unit numbers with the [F1] through
[F4] buttons, and then press the [SELECT] button to confirm the current setting.
<Checking the Indoor unit No.>
When the [SELECT] button is pressed, the target indoor unit will start fan operation.
If the unit is common or when running all units, all indoor units for the selected
refrigerant address will start fan operation.
33
33
3[Fig. 8-5-3] (P.6)
•When data collection from the indoor units is completed, the current settings
appears highlighted. Non-highlighted items indicate that no function settings
are made. Screen appearance varies depending on the “Unit No.” setting.
44
44
4[Fig. 8-5-4] (P.6)
•Use the [F1] or [F2] button to move the cursor to select the mode number, and
change the setting number with the [F3] or [F4] button.
55
55
5[Fig. 8-5-5] (P.6)
•When the settings are completed, press the [SELECT] button to send the set-
ting data from the remote controller to the indoor units.
•When the transmission is successfully completed, the screen will return to the
Function setting screen.
1) For IR wireless remote controller [Fig. 8-6] (P.7)
1. Changing the external static pressure setting.
•Be sure to change the external static pressure setting depending on the duct and
the grill used.
1Go to the function select mode
Press the CHECK button F twice continuously.
(Start this operation from the status of remote controller display turned off.)
CHECK
is lighted and “00” blinks.
Press the TEMP button Conce to set “50”. Direct the wireless remote controller
toward the receiver of the indoor unit and press the Hour button A.
2Setting the unit number
Press the TEMP button C and Dto set the unit number to 01-04 or 07. Direct the
wireless remote controller toward the receiver of the indoor unit and press the
Minute button B.
3Selecting a mode
Enter 08 to change the external static pressure setting using the C and D but-
tons.
Direct the wireless remote controller toward the receiver of the indoor unit and
press the Hour button A.
Current setting number: 1 = 1 beep (one second)
2 = 2 beeps (one second each)
3 = 3 beeps (one second each)
4Selecting the setting number
Use the C and Dbuttons to change the external static pressure setting to be
used.
Direct the wireless remote controller toward the sensor of the indoor unit and
press the Hour button A.
5To set the external static pressure
Repeat steps 3and 4to set the mode number to 10.
6Complete function selection
Direct the wireless remote controller toward the sensor of the indoor unit and
press the ON/OFF button E.
[Fig. 8-2-1] (P.5)
AScrew holding cover (2pcs)
BCover
[Fig. 8-2-2] (P.5)
ATerminal block box
BKnockout hole
CRemove
[Fig. 8-2-3] (P.5)
AUse conduit to keep the weight of the cable and external force from being applied to the
power supply terminal connector.
BIndoor/outdoor unit connecting cable
CConduit
DTerminal block box
EKnockout hole (for indoor/outdoor unit connecting cable)
FWasher (accessory)
GTensile force
HUse ordinary bushing
IWired remote controller cable or wiring for radio interface
[Fig. 8-2-4] (P.5)
ATerminal block for indoor/outdoor unit connecting
BTerminal block for wired remote controller
CIndoor/outdoor unit connecting cable
DWired remote controller cable
EIndoor controller board
FCN105 (RED/5P)
GWiring for radio interface
[Fig. 8-3] (P.6)
AIndoor terminal block
BGround wire (green/yellow)
CIndoor/outdoor unit connecting cable 3-core 1.5 mm2[AWG 16] or more
DOutdoor terminal block
1Indoor/outdoor unit connecting cable 3-core 1.5 mm2[AWG 16] or more, following Design
245 IEC 57.
2Indoor terminal block
3Outdoor terminal block
4Always install an ground wire (1-core 1.5 mm2[AWG 16]) longer than other cables
5Wired remote controller cable
Wire No ×size (mm2) : Cable 2C ×0.3
Accessory wire of remote controller
(wire length : 10 m [32 ft], non-polar. Max. 500 m [1640 ft])
6Wired remote controller
•Perform wiring as shown in [Fig. 8-3] (P.6). (Procure the cable locally.)
Make sure to use cables of the correct polarity only.
•Connect the terminal blocks as shown in [Fig. 8-3] (P.6).
Caution:
•Conduct electrical work properly.
•Firmly tighten the terminal screws to prevent them from loosening.
•After tightening, pull the wires lightly to confirm that they do not move.
8.3. Remote controller
8.3.1. For wired remote controller
1) Installing procedures
Refer to the installation manual that comes with each remote controller for details.
2) Function selection of remote controller
If two wired remote controllers are connected, set one to “Main” and the other to
“Sub”. For setting procedures, refer to “Function selection of remote controller” in the
operation manual for the indoor unit.
8.3.2. For IR wireless remote controller
1) Installation area
•Area in which the IR wireless remote controller is not exposed to direct sunshine.
•Area in which there is no near by heating source.
•Area in which the IR wireless remote controller is not exposed to cold (or hot) winds.
•Area in which the IR wireless remote controller can be operated easily.
•Area in which the IR wireless remote controller is beyond the reach of children.
* The signal can travel up to approximately 7 meters [23 ft] (in a streight line) within 45
degrees to both right and left of the center line of the receiver.
2) Setting the Model No.
[Fig. 8-4] (P.6)
1Insert batteries.
2Press the SET button with something sharp at the end.
Start this operation from the status of IR wireless remote controller display
turned off.
MODEL SELECT
blinks and Model No. is lighted.
3Press the temp button to set the Model No.
4Press the SET button with something sharp at the end.
MODEL SELECT
and Model No. are lighted for three seconds, then turned off.
8. Electrical work
Indoor Unit Model A Model No.
NTXDKS·A112AA 026
10_VN79D601H01_en.p65 18.9.3, 13:3613
12
6.6. Confirming drain discharge
ss
ss
sMake sure that the drain-up mechanism operates normally for discharge
and that there is no water leakage from the connections.
•Be sure to confirm the above when in heating operation.
•Be sure to confirm the above before ceiling work is done in the case of a new
construction.
1. Remove the water supply port cover on the same side as the indoor unit piping.
2. Fill water into the feed water pump using a feed water tank. Be sure to put the end
of the pump or tank in a drain pan. (If the insertion is incomplete, water may flow
over the machine.)
3. Perform the test run in cooling mode, or turn on the switch SWE on the controller
circuit board. (The drain pump and the fan are forced to operate without any re-
mote controller operation.) Make sure using a transparent hose that drain is dis-
charged.
4. After confirmation, cancel the test run mode, and turn off the main power. When
the switch SWE has been turned on, turn it off, and attach the water supply port
cover into its original position.
[Fig. 6-13] (P.4)
AInsert pump's end 2 to 4 cm [13/16 to 1-19/32 in].
BRemove the water supply port.
CAbout 2 liters
DWater
EFilling port
FScrew
[Fig. 6-14] (P.4)
<Indoor board>
6. Refrigerant piping work
[Drainage by gravity]
1. Insert the drain hose (accessory) into the drain port.
(The drain hose must not be bent more than 45° to prevent the hose from breaking
or clogging.)
The connecting part between the indoor unit and the drain hose may be discon-
nected at the maintenance. Fix the part with the accessory band, not be adhered.
2. Attach the drain pipe (O.D. ø32 PVC TUBE, field supplied).
(Attach the pipe with glue for the hard vinyl chloride pipe, and fix it with the band
(accessory).)
3. Perform insulation work on the drain pipe (O.D. ø32 PVC TUBE) and on the socket
(including elbow).
[Fig. 6-12] (P.4) * Drainage by gravity
AIndoor unit
BPipe cover (30 mm [3/16 in]) (accessory)
CTie band (accessory)
DBand fixing part
EInsertion margin
FDrain hose (accessory)
GDrain pipe (O.D. ø32 PVC TUBE, field supplied)
HInsulating material (field supplied)
IMax. 145 ± 5 mm
8.1. Power supply
Electrical specification Input capacity Main Switch/Fuse (A)
Power supply NTXDKS09, 12A112AA NTXDKS15, 18A112AA
(1 phase ~/N, 208/230V, 60Hz)
10 20
Warning:
•The compressor will not operate unless the power supply phase connection
is correct.
•The connection wiring between the outdoor and indoor units can be extended
up to a maximum of 50 m [164 ft], and the total extension including the crosso-
ver wiring between rooms is a maximum of 80 m [262 ft].
Provide switch with at least 3 mm [1/8 in] contact separation in each pole.
* Label each breaker according to purpose (heater, unit etc.).
[Fig. 8-1] (P.5)
AIndoor unit BOutdoor unit
CWired remote controller DMain switch/fuse
EGround wire FIndoor controller board
GRadio frequency interface for RF thermostat
8.2. Indoor wire connection
Work procedure
1. Remove two screws to detach the electric component cover.
2. Route each cable through the wiring intake into the electric component box. (Pro-
cure power cable and in-out connecting cable locally and use wired remote control
cable supplied with the unit.)
3. Securely connect the power cable and the in-out connecting cable and the wired
remote control cable to the terminal blocks.
4. For radio frequency interface
Connect the electric wires securely to the CN105 (RED) of indoor controller board.
Connect the electric wires securely to the corresponding terminals.
5. Secure the cables with clamps inside the electric component box.
6. Reattach the electric component cover.
•Attach power supply cable and indoor/outdoor cable to control box by using buffer
bushing for tensile force. (PG connection or the like.)
Warning:
•Attach the electrical part cover securely. If it is attached incorrectly, it could
result in a fire or electric shock due to dust, water, etc.
•Use the specified indoor/outdoor unit connecting wire to connect the indoor
and outdoor units. Attach the wire to the terminal block securely so that stress
is not applied to the terminal block connection. Incomplete connection or
fixing of the wire could result in a fire.
8. Electrical work
SWE SWE
ONOFF
connector
ONOFF
<ON> <OFF>
SWE SWE
ONOFF
connector
ONOFF
<OFF> <ON>
7. Duct work
•When connecting ducts, insert a canvas duct between the main body and the duct.
•Use non-combustible duct components.
Caution:
•The sound from the intake will increase dramatically if intake AA
AA
Ais fitted
directly beneath the main body. Intake AA
AA
Ashould therefore be installed as
far away from the main body as possible.
Particular care is required when using it with bottom inlet specifications.
•Install sufficient thermal insulation to prevent condensation forming on
outlet duct flanges and outlet ducts.
•To connect the air conditioner main body and the duct for potential equali-
zation.
•The distance between the inlet grille and the fan should be at least over 850
mm [33-15/32 in] or more.
If it is less than 850 mm [33-15/32 in], install a safety guard so the fan can-
not be easily accessed.
[Fig. 7-1] (P.5)
AAir inlet
BAir outlet
CAccess door
DCeiling
ECanvas duct
FAir filter
GInlet grille
1. Insert the drain hose (accessory) into the drain port (insertion margin: 25 mm
[1 in]).
(The drain hose must not be bent more than 45° to prevent the hose from break-
ing or clogging.)
(Attach the hose with glue for the hard vinyl chloride pipe, and fix it with the band
(accessory).)
2. Attach the drain pipe (O.D. ø32 mm [1-1/4 in] PVC TUBE, field supplied).
(Attach the pipe with glue for the hard vinyl chloride pipe, and fix it with the band
(accessory).)
3. Perform insulation work on the drain pipe (O.D. ø32 mm [1-1/4 in] PVC TUBE)
and on the socket (including elbow).
4. Check the drainage. (Refer to [Fig. 6-13])
5. Attach the insulating material (accessory), and fix it with the band (accessory) to
insulate the drain port.
[Fig. 6-11] (P.4)
AIndoor unit
BPipe cover (60 mm [3/8 in]) (accessory)
CTie band (accessory)
DVisible part
EInsertion margin
FDrain hose (accessory)
GDrain pipe (O.D. ø32 mm [1-1/4 in] PVC TUBE, field supplied)
HInsulating material (field supplied)
ITie band (accessory)
JMax.180 ± 5 mm [7-3/32 ± 7/32 in]
KNo gap. The joint of the insulation material must meet at the top.
10_VN79D601H01_en.p65 18.9.3, 13:3612
15
9. Test run
[Output pattern A] Errors detected by indoor unit
Wired remote controller
RF thermostat
Check code
P1
P2, P9
E6, E7
P4
P5
P6
EE
P8
E4
–
–
Fb
– –
IR wireless remote controller
Beeper sounds/OPERATION
INDICATOR lamp flashes
(Number of times)
1
2
3
4
5
6
7
8
9
10
11
12
No sound
Symptom
Intake sensor error
Pipe (Liquid or 2-phase pipe) sensor error
Indoor/outdoor unit communication error
Drain sensor error
Drain pump error
Freezing/Overheating safeguard operation
Communication error between indoor and outdoor units
Pipe temperature error
Remote controller signal receiving error
–
–
Indoor unit control system error (memory error, etc.)
No corresponding
Remark
9.3. Self-check
sRefer to the installation manual that comes with each remote controller for details.
sRF thermostat is not establised.
•Refer to the following tables for details on the check codes. (Wireless remote controller)
[Output pattern A]
[Output pattern B]
Beeper sounds Beep Beep Beep Beep Beep Beep
OPERATION
INDICATOR
lamp blinking
pattern
1st 2nd 3rd nth 1st 2nd · · · Repeated
Off On On On On Off On On
Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.Approx. 2.5 sec.
Self-check
starts
(Start signal
received) Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “P5”)
Number of blinks/beeps in pattern indicates
the check code in the following table
Beep
Beeper sounds Beep Beep Beep Beep Beep Beep
OPERATION
INDICATOR
lamp blinking
pattern
1st 2nd 3rd nth 1st 2nd · · · Repeated
Off On On On On Off On On
Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.Approx. 2.5 sec.
Self-check
starts
(Start signal
received) Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “U2”)
Number of blinks/beeps in pattern indicates
the check code in the following table
Beep
On
Approx. 3 sec.
On
Approx. 3 sec.
10_VN79D601H01_en.p65 18.9.3, 13:3615
14
8. Electrical work
9. Test run
Function table 1
Select unit number 00
Function table 2
Select unit numbers 01 to 04 or all units (AL [wired remote controller]/07 [wireless remote controller])
*1 When the power supply returns, the air conditioner will start 3 minutes later.
Note: When the function of an indoor unit were changed by function selection after the end of installation, always indicate the contents by entering a or other mark in the
appropriate check filed of the tables.
Mode
Filter sign
External static pressure
Settings
100 Hr
2500 Hr
No filter sign indicator
15 Pa (0.06 in.WG)
35 Pa (0.14 in.WG)
50 Pa (0.20 in.WG)
The same as setting of mode no.08
5 Pa (0.02 in.WG) (set mode no. 08 to 1)
Mode no. Setting no. Initial setting Check
1
07 2
3
1
08 2
3
1
10 2
Settings
Not available
Available *1
Indoor unit operating average
Set by indoor unit’s remote controller
Remote controller’s internal sensor
Not Supported
Supported (indoor unit is not equipped with outdoor-air intake)
Supported (indoor unit is equipped with outdoor-air intake)
Mode no. Setting no. Initial setting Check
1
01 2
1
02 2
3
1
03 2
3
Mode
Power failure automatic recovery*1
(AUTO RESTART FUNCTION)
Indoor temperature detecting
LOSSNAY connectivity
Note:
•Whenever changes are made to the function settings after installation or maintenance, be sure to record the changes with a mark in the “Check” column of the
Function table.
9.1. Before test run
►
After completing installation and the wiring and piping of the indoor and outdoor
units, check for refrigerant leakage, looseness in the power supply or control
wiring, wrong polarity, andno disconnection ofone phase in the supply.
►
Use a 500-volt megohmmeter to check that the resistance between the power
supply terminals and ground is at least 1.0 MΩΩ
ΩΩ
Ω.
►
Do not carry out this test on the control wiring (low voltage circuit) termi-
nals.
Warning:
Do not use the air conditioner if the insulation resistance is less than 1.0 MΩΩ
ΩΩ
Ω.
Insulation resistance
After installation or after the power source to the unit has been cut for an extended
period, the insulation resistance will drop below 1 MΩdue to refrigerant accumulat-
ing in the compressor. This is not a malfunction. Perform the following procedures.
1. Remove the wires from the compressor and measure the insulation resistance of
the compressor.
2. If the insulation resistance is below 1 MΩ, the compressor is faulty or the resist-
ance dropped due the accumulation of refrigerant in the compressor.
3. After connecting the wires to the compressor, the compressor will start to warm
up after power is supplied. After supplying power for the times indicated below,
measure the insulation resistance again.
•The insulation resistance drops due to accumulation of refrigerant in the com-
pressor. The resistance will rise above 1 MΩafter the compressor is warmed
up for two to three hours.
(The time necessary to warm up the compressor varies according to atmos-
pheric conditions and refrigerant accumulation.)
•To operate the compressor with refrigerant accumulated in the compressor,
the compressor must be warmed up at least 12 hours to prevent breakdown.
4. If the insulation resistance rises above 1 MΩ, the compressor is not faulty.
Caution:
•The compressor will not operate unless the power supply phase connection
is correct.
•Turn on the power at least 12 hours before starting operation.
- Starting operation immediately after turning on the main power switch can result in
severe damage to internal parts. Keep the power switch turned on during the op-
erational season.
9.2. Test run
►
Refer to the installation manual that comes with each remote controller for
details.
10_VN79D601H01_en.p65 18.9.3, 13:3614
15
9. Test run
[Output pattern A] Errors detected by indoor unit
Wired remote controller
RF thermostat
Check code
P1
P2, P9
E6, E7
P4
P5
P6
EE
P8
E4
–
–
Fb
– –
IR wireless remote controller
Beeper sounds/OPERATION
INDICATOR lamp flashes
(Number of times)
1
2
3
4
5
6
7
8
9
10
11
12
No sound
Symptom
Intake sensor error
Pipe (Liquid or 2-phase pipe) sensor error
Indoor/outdoor unit communication error
Drain sensor error
Drain pump error
Freezing/Overheating safeguard operation
Communication error between indoor and outdoor units
Pipe temperature error
Remote controller signal receiving error
–
–
Indoor unit control system error (memory error, etc.)
No corresponding
Remark
9.3. Self-check
sRefer to the installation manual that comes with each remote controller for details.
sRF thermostat is not establised.
•Refer to the following tables for details on the check codes. (Wireless remote controller)
[Output pattern A]
[Output pattern B]
Beeper sounds Beep Beep Beep Beep Beep Beep
OPERATION
INDICATOR
lamp blinking
pattern
1st 2nd 3rd nth 1st 2nd · · · Repeated
Off On On On On Off On On
Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.Approx. 2.5 sec.
Self-check
starts
(Start signal
received) Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “P5”)
Number of blinks/beeps in pattern indicates
the check code in the following table
Beep
Beeper sounds Beep Beep Beep Beep Beep Beep
OPERATION
INDICATOR
lamp blinking
pattern
1st 2nd 3rd nth 1st 2nd · · · Repeated
Off On On On On Off On On
Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.Approx. 2.5 sec.
Self-check
starts
(Start signal
received) Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “U2”)
Number of blinks/beeps in pattern indicates
the check code in the following table
Beep
On
Approx. 3 sec.
On
Approx. 3 sec.
10_VN79D601H01_en.p65 18.9.3, 13:3615
14
8. Electrical work
9. Test run
Function table 1
Select unit number 00
Function table 2
Select unit numbers 01 to 04 or all units (AL [wired remote controller]/07 [wireless remote controller])
*1 When the power supply returns, the air conditioner will start 3 minutes later.
Note: When the function of an indoor unit were changed by function selection after the end of installation, always indicate the contents by entering a or other mark in the
appropriate check filed of the tables.
Mode
Filter sign
External static pressure
Settings
100 Hr
2500 Hr
No filter sign indicator
15 Pa (0.06 in.WG)
35 Pa (0.14 in.WG)
50 Pa (0.20 in.WG)
The same as setting of mode no.08
5 Pa (0.02 in.WG) (set mode no. 08 to 1)
Mode no. Setting no. Initial setting Check
1
07 2
3
1
08 2
3
1
10 2
Settings
Not available
Available *1
Indoor unit operating average
Set by indoor unit’s remote controller
Remote controller’s internal sensor
Not Supported
Supported (indoor unit is not equipped with outdoor-air intake)
Supported (indoor unit is equipped with outdoor-air intake)
Mode no. Setting no. Initial setting Check
1
01 2
1
02 2
3
1
03 2
3
Mode
Power failure automatic recovery*1
(AUTO RESTART FUNCTION)
Indoor temperature detecting
LOSSNAY connectivity
Note:
•Whenever changes are made to the function settings after installation or maintenance, be sure to record the changes with a mark in the “Check” column of the
Function table.
9.1. Before test run
►
After completing installation and the wiring and piping of the indoor and outdoor
units, check for refrigerant leakage, looseness in the power supply or control
wiring, wrong polarity, andno disconnection ofone phase in the supply.
►
Use a 500-volt megohmmeter to check that the resistance between the power
supply terminals and ground is at least 1.0 MΩΩ
ΩΩ
Ω.
►
Do not carry out this test on the control wiring (low voltage circuit) termi-
nals.
Warning:
Do not use the air conditioner if the insulation resistance is less than 1.0 MΩΩ
ΩΩ
Ω.
Insulation resistance
After installation or after the power source to the unit has been cut for an extended
period, the insulation resistance will drop below 1 MΩdue to refrigerant accumulat-
ing in the compressor. This is not a malfunction. Perform the following procedures.
1. Remove the wires from the compressor and measure the insulation resistance of
the compressor.
2. If the insulation resistance is below 1 MΩ, the compressor is faulty or the resist-
ance dropped due the accumulation of refrigerant in the compressor.
3. After connecting the wires to the compressor, the compressor will start to warm
up after power is supplied. After supplying power for the times indicated below,
measure the insulation resistance again.
•The insulation resistance drops due to accumulation of refrigerant in the com-
pressor. The resistance will rise above 1 MΩafter the compressor is warmed
up for two to three hours.
(The time necessary to warm up the compressor varies according to atmos-
pheric conditions and refrigerant accumulation.)
•To operate the compressor with refrigerant accumulated in the compressor,
the compressor must be warmed up at least 12 hours to prevent breakdown.
4. If the insulation resistance rises above 1 MΩ, the compressor is not faulty.
Caution:
•The compressor will not operate unless the power supply phase connection
is correct.
•Turn on the power at least 12 hours before starting operation.
- Starting operation immediately after turning on the main power switch can result in
severe damage to internal parts. Keep the power switch turned on during the op-
erational season.
9.2. Test run
►
Refer to the installation manual that comes with each remote controller for
details.
10_VN79D601H01_en.p65 18.9.3, 13:3614
17
11.Maintenance
11.1. Gas charge
[Fig. 11-1] (P.7)
AIndoor unit
BUnion
CLiquid pipe
DGas pipe
EStop valve
FOutdoor unit
GRefrigerant gas cylinder operating valve
HRefrigerant gas cylinder for R410A with siphon
IRefrigerant (liquid)
JElectronic scale for refrigerant charging
KCharge hose (for R410A)
LGauge manifold valve (for R410A)
MService port
1. Connect gas cylinder to the service port of stop valve (3-way).
2. Execute air purge of the pipe (or hose) coming from refrigerant gas cylinder.
3. Replenish specified amount of refrigerant, while running the air conditioner
for cooling.
Note:
In case of adding refrigerant, comply with the quantity specified for the refrigerating
cycle.
Caution:
•Do not discharge the refrigerant into the atmosphere.
Take care not to discharge refrigerant into the atmosphere during installa-
tion, reinstallation, or repairs to the refrigerant circuit.
•For additional charging, charge the refrigerant from liquid phase of the gas
cylinder.
If the refrigerant is charged from the gas phase, composition change may
occur in the refrigerant inside the cylinder and the outdoor unit. In this case,
ability of the refrigerating cycle decreases or normal operation can be impos-
sible. However, charging the liquid refrigerant all at once may cause the com-
pressor to be locked. Thus, charge the refrigerant slowly.
To maintain the high pressure of the gas cylinder, warm the gas cylinder with warm
water (under 104 °F [40 °C]) during cold season. But never use naked fire or steam.
10.Easy maintenance function (For wired remote controller only)
Maintenance data, such as the indoor/outdoor unit’s heat exchanger temperature
and compressor operation current can be displayed with “Smooth maintenance”.
* This cannot be executed during test operation.
*Depending on the combination with the outdoor unit, this may not be sup-
ported by some models.
11
11
1[Fig. 10-1] (P.7)
•Select “Service” from the Main menu, and press the [SELECT] button.
•Select “Check” with the [F1] or [F2] button, and press the [SELECT] button.
•Select “Smooth maintenance” with the [F1] or [F2] button, and press the [SELECT]
button.
22
22
2[Fig. 10-2] (P.7)
Select each item.
•Select the item to be changed with the [F1] or [F2] button.
•Select the required setting with the [F3] or [F4] button.
“Ref. address” setting ............. “0” - “15”
“Stable mode” setting ............. “Cool” / “Heat” / “Normal”
•Press the [SELECT] button, fixed operation will start.
* Stable mode will take approx. 20 minutes.
33
33
3[Fig. 10-3] (P.7)
The operation data will appear.
The Compressor-Accumulated operating (COMP. run) time is 10-hour unit, and the
Compressor-Number of operation times (COMP. On/Off) is a 100-time unit (fractions
discarded).
Navigating through the screens
•To go back to the Main menu .......... [MENU] button
•To return to the previous screen ..... [RETURN] button
10_VN79D601H01_en.p65 18.9.3, 13:3617
16
9. Test run
•If the unit cannot be operated properly after the above test run has been performed, refer to the following table to remove the cause.
On the IR wireless remote controller with conditions above, following phenomena takes place.
•No signals from the remote controller are accepted.
•OPE lamp is blinking.
•The buzzer makes a short ping sound.
Note:
Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)
PLEASE WAIT
PLEASE WAIT → Error code
Display messages do not appear
even when operation switch is
turned ON (operation lamp does
not light up).
Symptom
After LED 1, 2 are lighted, LED 2 is turned
off, then only LED 1 is lighted. (Correct
operation)
Only LED 1 is lighted. →LED 1, 2 blink.
Only LED 1 is lighted. →LED 1, 2 blinks
twice, LED 2 blinks once.
•For about 2 minutes after power-on, operation of the
remote controller is not possible due to system start-up.
(Correct operation)
•Connector for the outdoor unit’s protection device is not
connected.
•Reverse or open phase wiring for the outdoor unit’s power
terminal block (L1, L2, L3)
•Incorrect wiring between indoor and outdoor units
(incorrect polarity of S1, S2, S3)
•Remote controller wire short
For about 2 minutes
following power-on
After about 2 min-
utes has expired
following power-on
LED 1, 2 (PCB in outdoor unit)Wired remote controller Cause
For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table.
9.4. AUTO RESTART FUNCTION
Indoor controller board
This model is equipped with the AUTO RESTART FUNCTION.
When the indoor unit is controlled with the remote controller, the operation mode,
set temperature, and the fan speed are memorized by the indoor controller board.
The auto restart function sets to work the moment the power has restored after
power failure, then, the unit will restart automatically.
Set the AUTO RESTART FUNCTION using the remote controller. (Mode no.01)
[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)
*1 If the beeper does not sound again after the initial two beeps to confirm the self-check start signal was received and the OPERATION INDICATOR lamp does not
come on, there are no error records.
*2 If the beeper sounds three times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial two beeps to confirm the self-check start signal was
received, the specified refrigerant address is incorrect.
•On IR wireless remote controller
The continuous buzzer sounds from receiving section of indoor unit.
Blink of operation lamp
•On wired remote controller
Check code displayed on the LCD.
Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)
Compressor overcurrent interruption
Open/short of outdoor unit thermistors
Compressor overcurrent interruption (When compressor locked)
Abnormal high discharging temperature/49C worked/ insufficient refrigerant
Abnormal high pressure (63H worked)/ Overheating safeguard operation
Abnormal temperature of heat sink
Outdoor unit fan protection stop
Compressor overcurrent interruption/Abnormal of power module
Abnormality of super heat due to low discharge temperature
Abnormality such as overvoltage or voltage shortage and abnormal
synchronous signal to main circuit/Current sensor error
–
–
Other errors (Refer to the technical manual for the outdoor unit.)
For details, check the LED
display of the outdoor controller
board.
IR wireless remote controller
Beeper sounds/OPERATION
INDICATOR lamp flashes
(Number of times)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Wired remote controller
RF thermostat
Check code
E9
UP
U3, U4
UF
U2
U1, Ud
U5
U8
U6
U7
U9, UH
–
–
Others
Symptom Remark
Indicates whether control power is supplied. Make sure that this LED is always lit.
Indicates whether power is supplied to the remote controller. This LED lights only in the case of
the indoor unit which is connected to the outdoor unit refrigerant address “0”.
Indicates state of communication between the indoor and outdoor units. Make sure that this LED is
always blinking.
LED 1 (power for microcomputer)
LED 2 (power for remote controller)
LED 3 (communication between indoor and outdoor units)
10_VN79D601H01_en.p65 18.9.3, 13:3616
17
11.Maintenance
11.1. Gas charge
[Fig. 11-1] (P.7)
AIndoor unit
BUnion
CLiquid pipe
DGas pipe
EStop valve
FOutdoor unit
GRefrigerant gas cylinder operating valve
HRefrigerant gas cylinder for R410A with siphon
IRefrigerant (liquid)
JElectronic scale for refrigerant charging
KCharge hose (for R410A)
LGauge manifold valve (for R410A)
MService port
1. Connect gas cylinder to the service port of stop valve (3-way).
2. Execute air purge of the pipe (or hose) coming from refrigerant gas cylinder.
3. Replenish specified amount of refrigerant, while running the air conditioner
for cooling.
Note:
In case of adding refrigerant, comply with the quantity specified for the refrigerating
cycle.
Caution:
•Do not discharge the refrigerant into the atmosphere.
Take care not to discharge refrigerant into the atmosphere during installa-
tion, reinstallation, or repairs to the refrigerant circuit.
•For additional charging, charge the refrigerant from liquid phase of the gas
cylinder.
If the refrigerant is charged from the gas phase, composition change may
occur in the refrigerant inside the cylinder and the outdoor unit. In this case,
ability of the refrigerating cycle decreases or normal operation can be impos-
sible. However, charging the liquid refrigerant all at once may cause the com-
pressor to be locked. Thus, charge the refrigerant slowly.
To maintain the high pressure of the gas cylinder, warm the gas cylinder with warm
water (under 104 °F [40 °C]) during cold season. But never use naked fire or steam.
10.Easy maintenance function (For wired remote controller only)
Maintenance data, such as the indoor/outdoor unit’s heat exchanger temperature
and compressor operation current can be displayed with “Smooth maintenance”.
* This cannot be executed during test operation.
*Depending on the combination with the outdoor unit, this may not be sup-
ported by some models.
11
11
1[Fig. 10-1] (P.7)
•Select “Service” from the Main menu, and press the [SELECT] button.
•Select “Check” with the [F1] or [F2] button, and press the [SELECT] button.
•Select “Smooth maintenance” with the [F1] or [F2] button, and press the [SELECT]
button.
22
22
2[Fig. 10-2] (P.7)
Select each item.
•Select the item to be changed with the [F1] or [F2] button.
•Select the required setting with the [F3] or [F4] button.
“Ref. address” setting ............. “0” - “15”
“Stable mode” setting ............. “Cool” / “Heat” / “Normal”
•Press the [SELECT] button, fixed operation will start.
* Stable mode will take approx. 20 minutes.
33
33
3[Fig. 10-3] (P.7)
The operation data will appear.
The Compressor-Accumulated operating (COMP. run) time is 10-hour unit, and the
Compressor-Number of operation times (COMP. On/Off) is a 100-time unit (fractions
discarded).
Navigating through the screens
•To go back to the Main menu .......... [MENU] button
•To return to the previous screen ..... [RETURN] button
10_VN79D601H01_en.p65 18.9.3, 13:3617
16
9. Test run
•If the unit cannot be operated properly after the above test run has been performed, refer to the following table to remove the cause.
On the IR wireless remote controller with conditions above, following phenomena takes place.
•No signals from the remote controller are accepted.
•OPE lamp is blinking.
•The buzzer makes a short ping sound.
Note:
Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)
PLEASE WAIT
PLEASE WAIT → Error code
Display messages do not appear
even when operation switch is
turned ON (operation lamp does
not light up).
Symptom
After LED 1, 2 are lighted, LED 2 is turned
off, then only LED 1 is lighted. (Correct
operation)
Only LED 1 is lighted. →LED 1, 2 blink.
Only LED 1 is lighted. →LED 1, 2 blinks
twice, LED 2 blinks once.
•For about 2 minutes after power-on, operation of the
remote controller is not possible due to system start-up.
(Correct operation)
•Connector for the outdoor unit’s protection device is not
connected.
•Reverse or open phase wiring for the outdoor unit’s power
terminal block (L1, L2, L3)
•Incorrect wiring between indoor and outdoor units
(incorrect polarity of S1, S2, S3)
•Remote controller wire short
For about 2 minutes
following power-on
After about 2 min-
utes has expired
following power-on
LED 1, 2 (PCB in outdoor unit)Wired remote controller Cause
For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table.
9.4. AUTO RESTART FUNCTION
Indoor controller board
This model is equipped with the AUTO RESTART FUNCTION.
When the indoor unit is controlled with the remote controller, the operation mode,
set temperature, and the fan speed are memorized by the indoor controller board.
The auto restart function sets to work the moment the power has restored after
power failure, then, the unit will restart automatically.
Set the AUTO RESTART FUNCTION using the remote controller. (Mode no.01)
[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)
*1 If the beeper does not sound again after the initial two beeps to confirm the self-check start signal was received and the OPERATION INDICATOR lamp does not
come on, there are no error records.
*2 If the beeper sounds three times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial two beeps to confirm the self-check start signal was
received, the specified refrigerant address is incorrect.
•On IR wireless remote controller
The continuous buzzer sounds from receiving section of indoor unit.
Blink of operation lamp
•On wired remote controller
Check code displayed on the LCD.
Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)
Compressor overcurrent interruption
Open/short of outdoor unit thermistors
Compressor overcurrent interruption (When compressor locked)
Abnormal high discharging temperature/49C worked/ insufficient refrigerant
Abnormal high pressure (63H worked)/ Overheating safeguard operation
Abnormal temperature of heat sink
Outdoor unit fan protection stop
Compressor overcurrent interruption/Abnormal of power module
Abnormality of super heat due to low discharge temperature
Abnormality such as overvoltage or voltage shortage and abnormal
synchronous signal to main circuit/Current sensor error
–
–
Other errors (Refer to the technical manual for the outdoor unit.)
For details, check the LED
display of the outdoor controller
board.
IR wireless remote controller
Beeper sounds/OPERATION
INDICATOR lamp flashes
(Number of times)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Wired remote controller
RF thermostat
Check code
E9
UP
U3, U4
UF
U2
U1, Ud
U5
U8
U6
U7
U9, UH
–
–
Others
Symptom Remark
Indicates whether control power is supplied. Make sure that this LED is always lit.
Indicates whether power is supplied to the remote controller. This LED lights only in the case of
the indoor unit which is connected to the outdoor unit refrigerant address “0”.
Indicates state of communication between the indoor and outdoor units. Make sure that this LED is
always blinking.
LED 1 (power for microcomputer)
LED 2 (power for remote controller)
LED 3 (communication between indoor and outdoor units)
10_VN79D601H01_en.p65 18.9.3, 13:3616
MITSUBISHI ELECTRIC TRANE HVAC US LLC
VN79D601H01
Please be sure to put the contact address/telephone number on
this manual before handing it to the customer.
Address: 1340 Satellite Blvd, Suwanee, GA 30024
This product is designed and intended for use in the residential,
commercial and light-industrial environment.
VN79D601H01_Backcover.fm 24 ページ ２０１８年９月１１日 火曜日 午前９時４分
Publication No. DL-SVN009A-EN
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