Mitsubishi Heavy Industries SCM71ZM-S1 User manual

Manual No.'17•SCM-T-225
TECHNICAL MANUAL
INVERTER MULTI-SPLIT SYSTEM
RESIDENTIAL AIR-CONDITIONERS
(Split system, air to air heat pump type)
(OUTDOOR UNIT)
SCM71ZM-S1
80ZM-S1
(INDOOR UNIT)
Wall mounted type
SRK20ZSX-S
25ZSX-S
35ZSX-S
50ZSX-S
60ZSX-S
SRK20ZS-S
25ZS-S
35ZS-S
50ZS-S
Floor standing type
SRF25ZMX-S
35ZMX-S
50ZMX-S
SRF25ZMA-S
35ZMA-S
50ZMA-S
4 way ceiling cassette type
FDTC25VF
35VF
50VF
60VF
Ceiling concealed type
SRR25ZM-S
35ZM-S
50ZM-S
60ZM-S
Ceiling suspended type
FDEN50VF
FDE50VG
Duct connected Low/Middle static pressure type
FDUM50VF

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CONTENTS
1. OUTDOOR UNITS ......................................................................................... 7
1.1 Specifications ......................................................................................... 7
2. INDOOR UNITS ............................................................................................. 18
2.1 Specifications ......................................................................................... 18
(3) Ceiling concealed type (SRR)
(1) Wall mounted type (SRK) ...................................................................... 18
(2) Floor standing type (SRF) ..................................................................... 27
............................................................... 33
(1) Wall mounted type (SRK)
(4) 4 way ceiling cassette type (FDTC) ....................................................... 37
(5) Ceiling suspended type (FDEN, FDE) ................................................... 41
(6) Duct connected Low/Middle static pressure type (FDUM) .................... 43
(5) Ceiling suspended type (FDEN, FDE) ................................................... 50
(6) Duct connected Low/Middle static pressure type (FDUM) .................... 52
(5) Ceiling suspended type (FDEN, FDE) ................................................... 61
(6) Duct connected Low/Middle static pressure type (FDUM) .................... 63
(2) Floor standing type (SRF) ..................................................................... 46
2.2 Exterior dimensions ............................................................................... 44
...................................................................... 44
1.2 Exterior dimensions ................................................................................ 9
1.3 Electrical wiring ...................................................................................... 10
1.4 Noise level .............................................................................................. 11
1.5 Application data ...................................................................................... 14
(3) Ceiling concealed type (SRR) ............................................................... 47
(4) 4 way ceiling cassette type (FDTC) ...................................................... 49
(1) Wall mounted type (SRK)
(2) Floor standing type (SRF) ..................................................................... 58
...................................................................... 56
(3) Ceiling concealed type (SRR) ............................................................... 59
(4) 4 way ceiling cassette type (FDTC) ....................................................... 60
(7) Remote control ...................................................................................... 53
2.3 Electrical wiring ..................................................................................... 56
(1) Wall mounted type (SRK)
(2) Floor standing type (SRF) ..................................................................... 69
...................................................................... 64
(3) Ceiling concealed type (SRR) ............................................................... 70
2.4 Noise level .............................................................................................. 64

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(4) 4 way ceiling cassette type (FDTC) ....................................................... 76
(5) Ceiling suspended type (FDEN, FDE) ................................................... 78
(6) Duct connected Low/Middle static pressure type (FDUM) .................... 79
(5) Ceiling suspended type (FDEN, FDE) ...................................................108
(6) Duct connected Low/Middle static pressure type (FDUM) ....................116
2.6 Application data ..................................................................................... 82
2.5 Characteristics of fan ............................................................................ 80
(1) Wall mounted type (SRK)
5. TABLE OF INDOOR UNIT COMBINATIONS ..............................................123
(1) Model SCM71ZM-S1 ..............................................................................123
(2) Model SCM80ZM-S1 ..............................................................................129
...................................................................... 82
..................................................................... 94
............................................................... 98
6. SELECTION CHARTS .................................................................................137
.......................................................102
(2) Floor standing type (SRF)
(3) Ceiling concealed type (SRR)
(4) 4 way ceiling cassette type (FDTC)
3. PIPING SYSTEM ..........................................................................................121
4. RANGE OF USAGE & LIMITATIONS .........................................................122
7.1 SRK,SRF and SRR series ......................................................................138
7. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ................138
7.1.1 SRK-ZSX series ..................................................................................138
7.1.2 SRK-ZS series ....................................................................................148
7.1.3 SRF, SRR series ................................................................................158
7.2 FDTC, FDEN, FDE and FDUM series .....................................................170
...........................1757.2.3 Operation control function by the indoor control
7.2.2 Operation control function by the wired remote control .................172
7.2.1 Remote control (Option parts) ...........................................................170
(1) Auto operation .........................................................................................175
(2) Operations of functional items during cooling/heating ............................176
(4) Timer operation .......................................................................................177
(5) Remote control display during the operation stop ....................................178
(6) Hot start (Cold draft prevention at heating) ............................................178
(7) Hot keep ..................................................................................................178
(3) Dehumidifying (DRY) operation ..............................................................176
(8) Auto swing control (FDTC, FDEN, FDE only) ........................................179

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(1) Summary ................................................................................................192
(3) Defrost operation ...................................................................................193
(2) Operation of major functional components in heating mode ..................192
7.3.1 Outline of heating operation ..............................................................192
7.3 Outdoor units .........................................................................................192
........................................................................182
.................................................................................182
....................................................................183
...........................182
......................................183
.................................................................................184
.............................................................................184
.............184
.......185
(13) Drain motor (DM) control
(12) Drain pump control
(16) Heating overload protection
(14) Operation check/drain pump test run operation mode
(15) Cooling, dehumidifying (DRY) frost protection
(19) High ceiling control
(17) Anomalous fan motor
(18)
Plural unit control - Control of 16 units group by one remote control
(20)
Abnormal temperature thermistor (return air/indoor heat exchanger) broken wire/short-circuit detection
...............................189(24) Selection of cooling/heating external input function
.................................................................190(25) Fan control at heating startup
....................................................190(27) Return air temperature compensation
(26)
Room temperature detection temperature compensation during heating ..........190
.........................................185(21) External input/output control (CnT or CnTA)
..................................................181(11) Compressor inching prevention control
(22) Operation permission/prohibition ...........................................................187
(23) Temporary stop input .............................................................................189
.....................................................190
.........................................................190
................................................190
...........................................................190
.........................................................191
(28) High power operation (RC-EX3 only)
(31) Home leave mode (RC-EX3 only)
(29) Energy-saving operation (RC-EX3 only)
(30) Warm-up control (RC-EX3 only)
(32) Auto temp. setting (RC-EX3 only)
....................................................191(35) Auto fan speed control (RC-EX3 only)
.................................................................191(37) Peak-cut time (RC-EX3 only)
(36) IU overload alarm (RC-EX3 only) ...........................................................191
................................................191(33) Fan circulator operation (RC-EX3 only)
(34)
The operation judgment is executed every 5 minutes (RC-EX3 only) .....191
(10) Filter sign .................................................................................................181
(9) Thermostat operation ..............................................................................180

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.....................................201
(11) Current safe ............................................................................................199
(16) Serial signal transmission error protection .............................................201
(15) Regulation of outdoor air flow .................................................................201
(14) Discharge pipe sensor disconnection protection control ........................200
(13) Outdoor unit failure ................................................................................200
(12) Current cut .............................................................................................200
(17) Rotor lock ...............................................................................................201
(18) Outdoor fan motor protection ..................................................................201
(20) Outdoor unit fan control at overload .......................................................202
(19) Outdoor fan control at low outdoor temperature
8.1 SRK, SRF and SRR series ......................................................................203
8. MAINTENANCE DATA .................................................................................203
(1) Cautions .................................................................................................203
(2) Items to check before troubleshooting ....................................................203
...........203
(4) Troubleshooting procedure (If the air-conditioner runs)
(3)
Troubleshooting procedure (If the air-conditioner does not run at all)
.........................204
(5) Self-diagnosis table ................................................................................205
(6) Service mode (Trouble mode access function) ......................................206
.......................214(7) Inspection procedures corresponding to detail of trouble
(8)
Phenomenon observed after shortcircuit, wire breakage on sensor ..............219
(1) Cooling overload protective control ........................................................195
(10) Compressor overheat protection ............................................................199
(6) Heating low outdoor temperature protective control
...................................................................................198(8) Crankcase heater
...................................................................................198(9) Inching prevention
(7) Refrigeration cycle system protective control ........................................198
...............................197
.................................................................195
(4) Heating high pressure control .................................................................196
(5) Heating overload protective control ........................................................197
(3) Cooling low outdoor temperature protective control
(2) Cooling high pressure control
...............................196
(1) Summary ................................................................................................194
(2) Operation of major functional components in cooling mode ...................194
7.3.2 Outline of cooling operation ..............................................................194
7.3.3 Protective control function ...............................................................195

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10. COMPONENT REPLACEMENT ...................................................................284
11. CHECKING PROCEDURE ...........................................................................296
12.1 Wired remote control ............................................................................301
12.2 Wireless kit .............................................................................................314
12.3 Simple wired remote control (RCH-E3) ................................................338
12.4 Interface kit (SC-BIKN2-E) .....................................................................344
12.5 Superlink E board (SC-ADNA-E) ..........................................................348
12.6 Ceiling concealed type (SRR) option parts .........................................350
12.7 OA spacer (FDTC only) .........................................................................353
12.8 Duct joint (FDTC only) ...........................................................................357
12.9 Filter kit (FDUM only) ..............................................................................358
12. OPTION PARTS ............................................................................................301
9.
TABLE OF FUNCTIONS CONNECTED WIRED REMOTE CONTROL (RC-E5) .............282
8.2.2 Troubleshooting flow .........................................................................239
......................................................................................240(2) Troubleshooting
(1) List of troubles ........................................................................................239
(6) Outdoor unit inspection points ................................................................238
(1) FDTC series (RCN-TC-24W-E2) ...........................................................314
(2) FDEN, FDE series (RCN-E-E2) ..............................................................322
.................................................................330(3) FDUM series (RCN-KIT4-E2)
(11) Inspection procedure for blown fuse on the indoor and outdoor PCB ....221
(12) Outdoor unit inspection points ................................................................222
........................................221(10) How to make sure of wireless remote control
8.2.1 Diagnosing of microcomputer circuit ..............................................224
8.2 FDTC, FDEN, FDE and FDUM series .....................................................224
(1) Selfdiagnosis function ............................................................................224
(2) Troubleshooting procedure .....................................................................227
..........................................................227
(5) Inverter checker for diagnosis of inverter output ....................................238
(4) Check of anomalous operation data with the remote control
(3) Troubleshooting at the indoor unit
.................236
(9) Checking the indoor electrical equipment ..............................................220

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■ How to read the model name
Example:
Outdoor unit
SCM 71 Z
Series code
Inverter type
Product capacity
Model name
M-S1
Capacity
Model
Floor standing type (SRF)
Outdoor unit to be combined (SCM)
20 25 35 50 60
○ ○ ○ ○ ○
○ ○ ○ ○
○ ○ ○
○ ○ ○
○ ○ ○ ○
○
○
○
○
SCM71ZM-S1, 80ZM-S1
Ceiling concealed type (SRR)
■ Table of models
Wall mounted type (SRK＊＊ZSX-S)
Wall mounted type (SRK＊＊ZS-S)
Duct connected Low/Middle static
pressure type (FDUM)
4 way ceiling cassette type (FDTC)
Ceiling suspended type (FDEN)
Ceiling suspended type (FDE)
Example:
Indoor unit
SRK 20 Z
Series code
Inverter type
Product capacity
Model name SRK
SRF
SRR
FDTC
FDEN, FDE
FDUM
SX-S
: Wall mounted type
: Floor standing type
: Ceiling concealed type
: 4 way ceiling cassette type
: Ceiling suspended type
: Duct connected Low/Middle
static pressure type
13. TECHNICAL INFORMATION ........................................................................360
(1) Model SCM71ZM-S1 ..............................................................................360
(2) Model SCM80ZM-S1 ..............................................................................371

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1. OUTDOOR UNITS
1.1 Specifications
Model
Item SCM71ZM-S1
Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz
Operation
data (1)
Nominal cooling capacity (Range) kW 7.1 ( 1.8 (Min.) - 8.8 (Max.))
Nominal heating capacity (Range) kW 8.6 ( 1.5 (Min.) - 9.4 (Max.))
Heating capacity (H2) kW −
Power consumption
Cooling
kW
1.58 (0.48 - 2.75)
Heating 2.00 (0.60 - 3.35)
Heating (H2) −
Max power consumption 3.7
Running current Cooling
A
7.3 / 6.9 / 6.6 (220/ 230/ 240 V)
Heating 9.2 / 8.8 / 8.4 (220/ 230/ 240 V)
Inrush current, max current 5.0 Max. 20
Power factor Cooling ％99
Heating 99
EER Cooling 4.49
COP Heating 4.30
Heating (H2) −
Sound power level Cooling
dB(A)
63
Heating 66
Sound pressure level Cooling 50
Heating 54
Silent mode sound pressure level Cooling:45 / Heating:51
Exterior dimensions (Height x Width x Depth) mm 750 x 880 x 340
Exterior appearance
(Equivalent color)
Stucco white
Munsell : (4.2Y 7.5/1.1), RAL : 7004
Net weight kg 62
Compressor type & Quantity RM-T5118MDE2 (Twin rotary type) x 1
Compressor motor (Starting method) kW 1.4 (Line starting)
Refrigerant oil (Amount, type) 0.675 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 3.15 (Incl. the amount for the piping of 40m)
Heat exchanger M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Device control Microcomputer control
Fan type & Quantity Propeller fan x 1
Fan motor (Starting method) W 86 x1 (Direct drive)
Air flow Cooling m3/min 50
Heating 56
Shock & vibration absorber Rubber sleeve (for fan motor & compressor)
Electric heater Crank case heater (220V 20W)
Safety equipments
Compressor overheat protection, Overcurrent protection,
Frost protection, Serial signal error protection, Outdoor fan motor error protection,
Heating overload protection( High pressure control ), Cooling overload protection
Installation
data
Refrigerant piping size ( O.D ) mm Liquid line:φ6.35 (1/4") x 4 Gas line:φ9.52 (3/8") x 4
Connecting method Flare connection
Insulation for piping Necessary (Both sides), independent
Refrigerant line (One way) length m Max. 25 (Length for one indoor unit)
Max. 70 (Total length for all rooms)
Vertical height diff. between O.U. and I.U. m Max. 20 (Outdoor unit is higher)
Max. 20 (Outdoor unit is lower)
Height difference of the indoor units m Max. 25
Recommended breaker size A 25
L.R.A. (Locked rotor ampere) A 5
Interconnecting wires Size x Core number 1.5mm2x 4 cores (Including earth cable)
Connecting method Terminal block (Screw fixing type)
IP number IPX4
Standard accessories Union : (φ9.52 →φ12.7 ) × 2, Installation sheet, Elbow, Grommet
Indoor unit to be combined
SRK20,25,35,50,60ZSX-S
SRK20,25,35,50ZS-S
SRF25,35,50ZMX(A)-S, SRR25,35,50,60ZM-S
FDTC25,35,50,60VF, FDEN50VF, FDE50VG, FDUM50VF
Number of connectable indoor units Min. 2 −Max. 4
Total of indoor units kW Max. 12.5
Notes (1) The data are measured at the following conditions.
Item
Operation
Indoor air temperature Outdoor air temperature Standards
DB WB DB WB
Cooling 27˚C 19˚C 35˚C 24˚C ISO5151-T1
Heating 20˚C — 7˚C 6˚C ISO5151-H1
Heating (H2) 20˚C — 2˚C 1˚C ISO5151-H2
(2) This air-conditioner is manufactured and tested in conformity with the ISO.
(3) Sound level indicates the value in an anechoic chamber. During operation these values are somewhat
higher due to ambient conditions.
(4) Select the breaker size according to the own national standard.
The pipe length is 5m.
RWC000Z304

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Model
Item SCM80ZM-S1
Power source 1 Phase, 220 - 240V, 50Hz / 220V, 60Hz
Operation
data (1)
Nominal cooling capacity (Range) kW 8.0 ( 1.8 (Min.) - 9.2 (Max.))
Nominal heating capacity (Range) kW 9.3 ( 1.5 (Min.) - 9.8 (Max.))
Heating capacity (H2) kW −
Power consumption
Cooling
kW
1.95 ( 0.48 - 2.83 )
Heating 2.26 ( 0.60 - 3.43 )
Heating (H2) −
Max power consumption 3.7
Running current Cooling
A
9.0 / 8.6 / 8.2 (220/ 230/ 240 V)
Heating 10.4 / 10.0 / 9.5 (220/ 230/ 240 V)
Inrush current, max current 5.0 Max. 20
Power factor Cooling ％99
Heating 99
EER Cooling 4.10
COP Heating 4.12
Heating (H2) −
Sound power level Cooling
dB(A)
66
Heating 66
Sound pressure level Cooling 54
Heating 54
Silent mode sound pressure level Cooling:46 / Heating:51
Exterior dimensions (Height x Width x Depth) mm 750 x 880 x 340
Exterior appearance
(Equivalent color)
Stucco white
Munsell : (4.2Y 7.5/1.1), RAL : 7004
Net weight kg 62
Compressor type & Quantity RM-T5118MDE2 (Twin rotary type) x 1
Compressor motor (Starting method) kW 1.4 (Line starting)
Refrigerant oil (Amount, type) 0.675 (DIAMOND FREEZE MA68)
Refrigerant (Type, amount, pre-charge length) kg R410A 3.15 (Incl. the amount for the piping of 40m)
Heat exchanger M fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Device control Microcomputer control
Fan type & Quantity Propeller fan x 1
Fan motor (Starting method) W 86 x1 (Direct drive)
Air flow Cooling m3/min 56
Heating 56
Shock & vibration absorber Rubber sleeve (for fan motor & compressor)
Electric heater Crank case heater (220V 20W)
Safety equipments
Compressor overheat protection, Overcurrent protection,
Frost protection, Serial signal error protection, Outdoor fan motor error protection,
Heating overload protection( High pressure control ), Cooling overload protection
Installation
data
Refrigerant piping size ( O.D ) mm Liquid line:φ6.35 (1/4") x 4 Gas line:φ9.52 (3/8") x 4
Connecting method Flare connection
Insulation for piping Necessary (Both sides), independent
Refrigerant line (One way) length m Max. 25 (Length for one indoor unit)
Max. 70 (Total length for all rooms)
Vertical height diff. between O.U. and I.U. m Max. 20 (Outdoor unit is higher)
Max. 20 (Outdoor unit is lower)
Height difference of the indoor units m Max. 25
Recommended breaker size A 25
L.R.A. (Locked rotor ampere) A 5
Interconnecting wires Size x Core number 1.5mm2x 4 cores (Including earth cable)
Connecting method Terminal block (Screw fixing type)
IP number IPX4
Standard accessories Union : (φ9.52→φ12.7) × 2, Installation sheet, Elbow, Grommet
Indoor unit to be combined
SRK20,25,35,50,60ZSX-S
SRK20,25,35,50ZS-S
SRF25,35,50ZMX(A)-S, SRR25,35,50,60ZM-S
FDTC25,35,50,60VF, FDEN50VF, FDE50VG, FDUM50VF
Number of connectable indoor units Min. 2 −Max. 4
Total of indoor units kW Max. 13.5
Notes (1) The data are measured at the following conditions.
Item
Operation
Indoor air temperature Outdoor air temperature Standards
DB WB DB WB
Cooling 27˚C 19˚C 35˚C 24˚C ISO5151-T1
Heating 20˚C — 7˚C 6˚C ISO5151-H1
Heating (H2) 20˚C — 2˚C 1˚C ISO5151-H2
(2) This air-conditioner is manufactured and tested in conformity with the ISO.
(3) Sound level indicates the value in an anechoic chamber. During operation these values are somewhat
higher due to ambient conditions.
(4) Select the breaker size according to the own national standard.
The pipe length is 5m.
RWC000Z304

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1.2 Exterior dimensions
Models SCM71ZM-S1, 80ZM-S1
RWC000Z302
15
60
38019
418
73880
150 580 150 26
340
2-R7.5
223
47.5
310
61
61
110.4 52
185 10
24
750
214.4 52
318.4 52
422.4 52
20
355 170
560
Unit:mm
The height of a wall is 1200mm or less
Notes
（1）It must not be surrounded by walls on four sides. （2）The unit must be fixed with anchor bolts. An anchor bolt
must not protrude more than 15mm.
（3）Where the unit is subjected to strong winds, lay it in such a
direction that the blower outlet faces perpendicularly to the dominant wind direction.
（4）Leave 1.2m or more space above the unit. （5）A wall in front of the blower outlet must not exceed the
unit's height.
（6）The model name label is attached on the rear panel.
D
Terminal block
C
E
Symbol Content
A Service valve connection（gas side）φ9.52（3／8"）（Flare）
B Service valve connection（liquid side）φ6.35（1／4"）（Flare）
C Pipe／cable draw-out hole
D Drain discharge hole φ20 x 3 places
E Anchor bolt hole M10 x 4 places
B
A
Air intake
Air intake
Air outlet
（Service space
for electrical parts）
Minimum installation space
L2 L4
L1
L3
Center of gravity
Center of gravity
L2 L3
L4
L1
300
100
250
Open
ＩＩＩ
Open
250
100
500
ＩＩＩ
Open
250
150
250
Examples of
Dimensions
installation

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BK RDBlack Red
BL WHBlue White
BR Brown Yellow GN Green
OR Orange
YG Yellow／Green
YE
EEV A,EEV B
L
Compressor motor Electric expansion valve Reactor
TH2（Tho-A） TH3（Tho-D）
Heat exchanger sensor Outdoor air temp. sensor Discharge pipe temp. sensor
CM
TH1
Connector
20S 4-way valve（coil）
Suction pipe temp. sensor
TH4（Tho-S）
FMo Fan motor
（outdoor unit）
（Tho-R）
CN20V
CNSUB
CNFAN
CNA
CNC
CNEEV1
CNMAIN
CNTH
CN20S
CNHEAT
EEV C,EEV D
HEATER Crank case heater
TB1～5 Terminal block
CNEEV2
CNB CND
EEV
S-1
BK
WH
RD
V W U
FMo
R-1
CNTH
CNFAN
S-2
BK WH WH
S-1
CNSUB
CNMAIN
S
R
BK WH
IN
IN
S
R
O O
250V 20A
F4 FUSE
222
G2
YG
C-2
RD
C-1
CN20V
3
2
G1
YG
CNEEV1 CNEEV2
TB2
CNA CNB CNC
CND
TB1
N
L
AEEV
BEEV
CEEV
D
TB3
TB4
TB5
3
1
3
1 3
1
3
2／N
1
YG
WH BK
BK
WH
RD
YG
BK
WH
BL
YG
BK
WH
YE
YG
BK
WH
BR YG
UNIT A
UNIT B
UNIT C
UNIT D
M
3～
M
MMMM
YG
Power
supply
WH RD BL GN
PWB 2（SUB）PWB 1（MAIN）
t゜
t゜
t゜
T2 T1
L
YE
YE
TH1 TH2 TH3
2
t゜
TH4
T12 T11
L
BL
BL
2／N
2／N 2／N
CN20S
CNHEAT
20S
HEATER
WH
RD
2 2
（coil）
CM
To indoor unit
Power cable Signal wire Earth wire
1
3
T 1A L 250V
F3 FUSE
4444
3
SCM71ZM-S1
Model name
2.5mm x 3 12 1.5mm x 420.0 22
[ ]
2N
Power cable, indoor-outdoor connecting wires
Switchgear or circuit breaker capacity should be chosen according to national or regional electricity The power cable specifications are based on the assumption that a metal or plastic conduit is used with no more than three cables contained in a conduit and a voltage drop is 2％. For an installation falling outside of these conditions, please follow the national or regional electricity regulations. The wire numbers include earth wire（Yellow／Green）
*
regulations.
SCM80ZM-S1
Color marks
Mark Color Mark Color
Meaning of marks
Item Description
Item Description
MAX running current Power cable
wire size x number*（A）
Power cable length
（m）
Connecting cable
wire size x number*
Power source 1 Phase 220-240V 50Hz
220V 60Hz
1.3 Electrical wiring
Models SCM71ZM-S1, 80ZM-S1
RWC000Z303

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Noise
Level
Cooling 63 dB(A)
Heating 66 dB(A)
Condition ISO5151 T1/H1
Mode Rated capacity value
Noise
Level
Cooling 66 dB(A)
Heating 66 dB(A)
Condition ISO5151 T1/H1
Mode Rated capacity value
Model SCM80ZM-S1
30.0
40.0
50.0
60.0
70.0
80.0
90.0
63 125 250 50010002000400
08
000
Mid octave band frequency (Hz)
Sound power level (dB)
30.0
40.0
50.0
60.0
70.0
80.0
90.0
63 125 250 50010002000400
08
000
Mid octave band frequency (Hz)
Sound power level (dB)
× ...... Cooling, Heating
× ...... Cooling, Heating
1.4 Noise level
(1) Sound power level
Model SCM71ZM-S1

-
12
-
'17 • SCM-T-225
× ...... Cooling, Heating
× ...... Cooling, Heating
Noise
Level
Cooling 50 dB(A)
Heating 54 dB(A)
Condition ISO5151 T1/H1
Mode Rated capacity value
Noise
Level
Cooling 54 dB(A)
Heating 54 dB(A)
Condition ISO5151 T1/H1
Mode Rated capacity value
10
20
30
40
50
60
70
10
20
30
40
50
60
70
N50
N30
N40
N60
N70
N20
63 125 250 50010002000400
08
000
Mid octave band frequency (Hz)
Sound pressure level (dB)
(Standard 2×10-5 Pa)
Model SCM80ZM-S1
10
20
30
40
50
60
70
10
20
30
40
50
60
70
63 125 250 50010002000400
08
000
Sound pressure level (dB)
(Standard 2×10-5 Pa)
N50
N30
N40
N60
N70
N20
Mid octave band frequency (Hz)
(2) Sound pressure level
(a) Rated capacity value
Model SCM71ZM-S1

-
13
-
'17 • SCM-T-225
× ...... Cooling, Heating
× ...... Cooling, Heating
Noise
Level
Cooling 45 dB(A)
Heating 51 dB(A)
Condition ISO5151 T1/H1
Mode Silent
Noise
Level
Cooling 46 dB(A)
Heating 51 dB(A)
Condition ISO5151 T1/H1
Mode Silent
10
20
30
40
50
60
70
10
20
30
40
50
60
70
63 125 250 50010002000400
08
000
Sound pressure level (dB)
(Standard 2×10-5 Pa)
Mid octave band frequency (Hz)
N50
N30
N40
N60
N70
N20
Model SCM80ZM-S1
10
20
30
40
50
60
70
10
20
30
40
50
60
70
63 125 250 50010002000400
08
000
Sound pressure level (dB)
(Standard 2×10-5 Pa)
Mid octave band frequency (Hz)
N50
N30
N40
N60
N70
N20
(b) Silent mode
Model SCM71ZM-S1

-
14
-
'17 • SCM-T-225
INSTALLATION MANUALFOROUTDOOR UNIT
•This installation manual deals with an outdoor unit installation only. For an indoor unit installation, refer to page 82.
NOTE
This model requires a minimum of 2 indoor units.
SAFETY PRECAUTIONS
•Before installation, read the “SAFETY PRECAUTIONS” carefully and strictly follow it during the installa-
tion work in order to protect yourself.
•The precautionary itemsmentioned below are distinguished into two levels,
WARNING
and
CAUTION
.
WARNING
Indicates a potentially hazardous situation which, if not avoided, can result in serious con-
sequences such as death or severe injury.
CAUTION
Indicates a potentially hazardous situation which, if not avoided, can result in personal in-
jury or property damage.
Both mention the important items to protect your health and safety. Therefore, strictly follow them by any means.
• Be sure to no operation problem on the equipment after completing the installation. If unusual
noise can be heard during the test run, consult the dealer.
•Be sure to explain the operating methods as well as the maintenance methods of this equipment to the
user according to the user’s manual.
•Be sure to keep the installation manual together with user’s manual at a place where it is easily accessi-
ble to the user any time. Moreover, ask the user to hand the manuals to a new user, whenever required.
WARNING
•Be sure to use only for residential purpose.
If this unit is installed in inferior environment such as machine shop, vehicle (like ship), warehouse,
etc., it can malfunction.
• Installation must be carried out by the installer completely in accor-
dance with the installation manual.
Installation by non person or incorrect installation can cause serious troubles such as water
leak, electric shock, and personal injury.
• Be sure to wear protective goggles and gloves whileperforming installation work.
Improper safety measures can result in personal injury.
• Use the original accessories and the components for the installation.
Using parts other than those prescribed may cause water leak, electric shock, and personal injury.
•
Do not install the unit near the location where leakage of gases can occur.
If leaked gases accumulate around the unit, it can cause resulting in property damage and per-
sonal injury.
•When installing the unit in small rooms, make sure that refrigerant density
does not exceed the limit (Reference: ISO5149) in the event of leakage.
If refrigerant density exceeds the limit, consult the dealer and install the ventilation system.
Otherwise lack of oxygen can occur resulting in serious accident.
•Install the unit in a location where unit will remain stable, horizontal and free
of any vibration transmission.
Unsuitable installation location can cause the unit to fall resulting in material damage and personal injury.
•Do not run the unit with removed panels or protections.
Touching rotating equipments, hot surfaces or high voltage parts can cause personal injury due to
entrapment, burn or electric shock.
• This unit is designed for R410A.
Using any other refrigerant can cause unit failure and personal injury.
• Do not vent R410A into atmosphere.
R410A is a greenhouse gas with a Global Warning Potential(GWP)=2088.
•Make sure that no air enters the refrigerant circuit when the unit is installed
and removed.
If air enters the refrigerant circuit, the pressure in the refrigerant circuit will become too high, which
can cause burst and personal injury.
• Be sure to use the prescribed pipes, nuts and tools for R410A.
Using existing parts (for R22 or R407C) can cause refrigerant circuit burst resulting in unit failure and
personal injury.
•Be sure to connect both liquid and gas connecting pipes properly before op-
erating the compressor.
Do not open the liquid and gas service valves before completing piping
work, and evacuation.
If the compressor is operated when connecting pipes are not connected and service valves are
open, air can be sucked into the refrigerant circuit which can cause anomalous high pressure result-
ing in burst or personal injury.
• Be sure to tighten the nuts to torque using the torque wrench.
Tightening nuts with excess torque can cause burst and refrigerant leakage after a long period.
•During pump down work, be sure to stop the compressor before closing ser-
vice valves and removing connecting pipes.
If the connecting pipes are removed when the compressor is in operation and service valves areopen,
air can be sucked into the refrigerant circuit which can cause anomalous high pressure resulting in
burst or personal injury.
•In the event of refrigerant leakage during installation, be sure to ventilate the
working area properly.
If the refrigerant comes into contact with naked poisonous gases will be produced.
• Electrical work must be carried out by the electrician, strictly in ac-
cordance with national or regional electricity regulations.
Incorrect installation can cause electric shock, or personal injury.
•Make sure that earth leakage breaker and circuit breaker of appropriate ca-
pacities are installed.
Circuit breaker should be able to disconnect all poles under over current. Absence of appropriate
breakers can cause electric shock, personal injury or property damage.
•Be sure to switch off the power source in the event of installation, mainte-
nance or service.
If the power source is not switched off, there is a risk of electric shock, unit failure or personal injury.
•Be sure to tighten the cables securely in terminal block and relieve the ca-
bles properly to prevent overloading the terminal blocks.
Loose connections or cable mountings can cause anomalous heat production or
•Do not process, splice or modify the power cable, or share the socket with
other power plugs.
Improper power cable or power plug can cause or electric shock due to poor connection, insuf-
insulation or over-current.
•Do notperform any changein protective device orits setup condition yourself.
Changing protective device can cause electric shock, or burst.
•Be sure to clamp the cables properly so that they do not touch any internal
component of the unit.
If cables touch any internal component, it can cause overheating and
•Be sure to install service cover properly.
Improper installation can cause electric shock or due to intrusion of dust or water.
•Be sure to use the prescribed power and connecting cables for electrical work.
Using improper cables can cause electric leak or
•This appliance must be connected to main power source by means of a cir-
cuit breaker or switch with a contact separation of at least 3mm.
Improperelectrical work can cause unit failure or personal injury.
• When plugging this unit, a plug conforming to the standard IEC60884-1 must be
used.
Using improper plug can cause electric shock or
•Be sure to connect the power source cable with power source properly.
Improper connection can cause intrusion of dust or water resulting in electric shock or
CAUTION
•Take care when carrying the unit by hand.
If the unit weight is more than 20kg, it must be carried by two or more persons.
Do not carry the unit by the plastic straps. Always use the carry handle.
•Do not install the outdoor unit in a location where insects and small animals
can inhabit.
Insects and small animals can enter the electrical parts and cause damage resulting in or per-
sonal injury. Instruct the user to keep the surroundings clean.
•If the outdoorunitisinstalled at height, make sure that there is enough space
for installation, maintenance and service.
space can result in personal injury due to falling from the height.
•Do not install the unit near the location where neighbours are bothered by
noise or air generating from the unit.
It can affect surrounding environment and cause a claim.
•Do not install in the locations where unit is directly exposed to corrosive
gases (like sulphide gas, chloride gas), sea breeze or salty atmosphere.
It can cause corrosion of heat exchanger and damage to plastic parts.
•Do not install the unit close to the equipments that generate electromagnetic
waves and/or high-harmonic waves.
Equipment such as inverters, standby generators, medical high frequency equipments and telecom-
munication equipments can affect the system, and cause malfunctions and breakdowns.
The system can also affect medical equipment and telecommunication equipment, and obstruct its
function or cause jamming.
•Do not install the unit in the locations where:
•There are heat sources nearby.
•Unit is directly exposed to rain or sunlight.
•There is any obstacle which can prevent smooth air circulation from inlet and outlet side of the unit.
•Unit is directly exposed to oil mist and steam such as kitchen.
• Chemical substances like ammonia (organic fertilizer), calcium chloride (snow melting agent) and
acid (sulfurous acid etc.), which can harm the unit, will generate or accumulate.
•Drain water can not be discharged properly.
•TV set or radio receiver is placed within 1m.
•Height above sea level is more than 1000m.
It can cause performance degradation, corrosion and damage of components, unit malfunction and
•Dispose of all packing materials properly.
Packing materials contain nails and wood which can cause personal injury.
Keep the polybag away from children to avoid the risk of suffocation.
•Do not put anything on the outdoor unit.
Object may fall causing property damage or personal injury.
• Do not touch the aluminum of the outdoor unit.
Aluminium temperature is high during heating operation. Touching can cause burn.
• Do not touch any refrigerant pipewith yourhandswhen the system isin operation.
During operation the refrigerant pipes become extremely hot or extremely cold depending on the op-
erating condition. Touching pipes can cause personal injury like burn (hot/cold).
•Install isolator or disconnect switch on the power source wiring in accor-
dance with the local codes and regulations.
The isolator should be locked in OFF state in accordance with EN60204-1.
2. OUTDOOR UNIT INSTALLATION
NOTE
Do not step on a top and the service cover of the unit.
1. Haulage
•Always carry or move the unit with two or more persons.
•The right hand side of the unit as viewed from the front (outlet side) is heavier.
A person carrying the right hand side must take care of this fact. A person carrying the left hand side
must hold the handle provided on the front panel of the unit with his right hand and the corner column
section of the unit with his left hand.
•In the case of hoisting the unit, use nylon slings or ropes and protection pads for prevend damage of
the unit.
Heavy
Pad
CAUTION
When a unit is hauled, take care of its gravity center position which is shifted towards right hand side.
If the unit is not hauled properly, it can go off balance and fall resulting in serious injury.
2. Selecting the installation location
Select the suitable installation location where:
•Unit will be stable, horizontal and free of any vibration transmission.
•There is no obstacle which can prevent smooth air circulation from inlet and outlet side of the unit.
•There is enough space for service and maintenance of unit.
•Neighbours are not bothered by noise or air generating from the unit.
•Outlet air of the unit does not blow directly to animals or plants.
•Drain water can be discharged properly.
• There is no risk of gas leakage.
•There are no other heat sources nearby.
•Unit is not directly exposed to rain or sunlight.
•Unit is not directly exposed to oil mist and steam.
•Chemical substances like ammonia (organic fertilizer), calcium chloride (snow melting agent) and acid
(sulfurous acid etc.), which can harm the unit, will not generate or accumulate.
•Unit is not directly exposed to corrosive gases (like sulphide gas, chloride gas), sea breeze or salty
atmosphere.
•No TV set or radio receiver is placed within 1m.
•Unit is not affected by electromagnetic waves and/or high-harmonic waves generated by other
equipments.
•Strong wind does not blow against the unit outlet.
•Heavy snowfalls do not occur (If installed, provide proper protection to avoid snow accumulation).
NOTE
If the unit is installed in the area where there is a possibility of strong wind or snow accumulation, the
following measures are required.
(1) Location of strong wind
•Place the unit with its outlet side facing the wall. •Place the unit such that the direction of air from
the outlet gets perpendicular to the wind direc-
tion.
Over 500mm
Wind
direction
Wind
direction
(2) Location of snow accumulation
•Install the unit on the base so that the bottom is
higher than snow cover surface.
•Install the unit under eaves or provide the roof
on site.
3. Installation space
•There must be 1 meter or larger space between the unit and the wall in at least 1 of the 4 sides.
Walls surrounding the unit from 4 sides is not acceptable. The wall height on the outlet side should
be 1200 mm or less. Refer to the following and table for details.
Example
installation
Size
L1
L2
L3
L4
(mm)
Open
300
100
250
Open
250
150
250
500
Open
100
250
Ι ΙΙ ΙΙΙ
Inlet
(
Service
space
)
Inlet
Outlet
L3
L4
L1
L2
NOTE
When more than one unit are installed side by side, provide a 250mm or wider interval between them
as a service space.
CAUTION
When more than one unit are installed in parallel directions, provide inlet space so that short-
circuiting may not occur.
4. Drain piping work (If necessary)
Carry out drain piping work by using a drain elbow and a drain grommet supplied separately as acces-
sories if condensed water needs to be drained out.
(1) Install drain elbow and drain grommet.
(2) Seal around the drain elbow and drain grommet with putty or adequate caulking material.
Grommet
Drain elbow
Grommet
Drain hose
(To be procured on the installer’s part)
Do not put a grommet on this hole.
This is a supplementary drain hole to discharge drain water, when a large amount of it is gathered.
CAUTION
Do not use drain elbow and drain grommet if there is a possibility to have several consecutive days of
sub zero temperature. (There is a risk of drain water freezing inside and blocking the drain.)
5. Installation
• Install the unit on a level base.
• While installing the unit, keep space and the unit’s legs with 4 anchor bolts as shown in the
below. The protrusion of an anchor bolt from the foundation surface must be kept within 15mm.
200 mm over
If drain piping work was carried
out keep the clearance more
than 100mm.
580 mm 380 mm
15 mm
Anchor bolt (M10-12) ×4 pcs
CAUTION
• Install the unit properly so that it does not fall over during earthquake, strong wind, etc.
• Make sure that unit is installed on a level base. Installing unit on uneven base may result in unit
malfunction.
3. PREPARATION FOR WORK
1. Removing service cover
Remove the screw. Slide service cover downwards and remove it.
Screw
Screw
Service
cover
2. Removing terminal cover
Remove the screw and take out terminal cover.
Screw
Terminal
cover
RPC012A920C
Model SCM71/80
R410A REFRIGERANT USED
1. ACCESSORIES AND TOOLS
Locally procured parts Tools for installation work
(a) Anchor bolt(M10-M12)×4 pcs Plus headed driver Spanner wrench Vacuum pump*
(b) Putty Knife Torque wrench [14.0-62.0N.m(1.4-6.2kgf•m)] Gauge manifold *
(c) Electrical tape Saw Wrench key (Hexagon) [4mm] Charge hose *
(d) Connecting pipe Tape measure Flaring tool set * Vacuum pump adapter*
(Anti-reverse type)
(e) Connecting cable
(f) Power cable Pipe cutter Flare adjustment gauge Gas leak detector *
(g) Clamp and screw (for work) *Designed for R410A
Standard accessories
(Supplied with outdoor unit) Q’ty
(1) Drain grommet 2
(2) Drain elbow 1
(3)
Variable diameter joint
ø9.52→ø12.7
(Inside service cover)
2
NOTE
Variable diameter joint is inside
service cover. Remove it at a
safe place before carring in the
installation location to prevent
unexpected fall of parts.
1.5 Application data
Models SCM71ZM-S1, 80ZM-S1

-
15
-
'17 • SCM-T-225
INSTALLATION MANUAL FOR OUTDOOR UNIT
•This installation manual deals with an outdoor unit installation only. For an indoor unit installation, refer to page 82.
NOTE
This model requires a minimum of 2 indoor units.
SAFETY PRECAUTIONS
•Before installation, read the “SAFETY PRECAUTIONS” carefully and strictly follow it during the installa-
tion work in order to protect yourself.
•The precautionary items mentioned below are distinguished into two levels,
WARNING
and
CAUTION
.
WARNING
Indicates a potentially hazardous situation which, if not avoided, can result in serious con-
sequences such as death or severe injury.
CAUTION
Indicates a potentially hazardous situation which, if not avoided, can result in personal in-
jury or property damage.
Both mention the important items to protect your health and safety. Therefore, strictly follow them by any means.
• Be sure to no operation problem on the equipment after completing the installation. If unusual
noise can be heard during the test run, consult the dealer.
•Be sure to explain the operating methods as well as the maintenance methods of this equipment to the
user according to the user’s manual.
•Be sure to keep the installation manual together with user’s manual at a place where it is easily accessi-
ble to the user any time. Moreover, ask the user to hand the manuals to a new user, whenever required.
WARNING
•Be sure to use only for residential purpose.
If this unit is installed in inferior environment such as machine shop, vehicle (like ship), warehouse,
etc., it can malfunction.
• Installation must be carried out by the installer completely in accor-
dance with the installation manual.
Installation by non person or incorrect installation can cause serious troubles such as water
leak, electric shock, and personal injury.
•
Be sure to wear protective goggles and gloveswhile performing installation work.
Improper safety measures can result in personal injury.
• Use the original accessories and the components for the installation.
Using parts other than those prescribed may cause water leak, electric shock, and personal injury.
•
Do not install the unit near the location where leakage of gases can occur.
If leaked gases accumulate around the unit, it can cause resulting in property damage and per-
sonal injury.
•When installing the unit in small rooms, make sure that refrigerant density
does not exceed the limit (Reference: ISO5149) in the event of leakage.
If refrigerant density exceeds the limit, consult the dealer and install the ventilation system.
Otherwise lack of oxygen can occur resulting in serious accident.
•Install the unit in a location where unit will remain stable, horizontal and free
of any vibration transmission.
Unsuitable installation location can cause the unit to fall resulting in material damage and personal injury.
•Do not run the unit with removed panels or protections.
Touching rotating equipments, hot surfaces or high voltage parts can cause personal injury due to
entrapment, burn or electric shock.
• This unit is designed for R410A.
Using any other refrigerant can cause unit failure and personal injury.
• Do not vent R410A into atmosphere.
R410A is a greenhouse gas with a Global Warning Potential(GWP)=2088.
•Make sure that no air enters the refrigerant circuit when the unit is installed
and removed.
If air enters the refrigerant circuit, the pressure in the refrigerant circuit will become too high, which
can cause burst and personal injury.
• Be sure to use the prescribed pipes, nuts and tools for R410A.
Using existing parts (for R22 or R407C) can cause refrigerant circuit burst resulting in unit failure and
personal injury.
•Be sure to connect both liquid and gas connecting pipes properly before op-
erating the compressor.
Do not open the liquid and gas service valves before completing piping
work, and evacuation.
If the compressor is operated when connecting pipes are not connected and service valves are
open, air can be sucked into the refrigerant circuit which can cause anomalous high pressure result-
ing in burst or personal injury.
• Be sure to tighten the nuts to torque using the torque wrench.
Tightening nuts with excess torque can cause burst and refrigerant leakage after a long period.
•During pump down work, be sure to stop the compressor before closing ser
vice valves and removing connecting pipes.
If the connecting pipes are removed when the compressor is in operation and service valves areopen,
aircan be sucked into the refrigerant circuit which can cause anomalous high pressure resulting in
burst or personal injury.
•In the event of refrigerant leakage during installation, be sure to ventilate the
working area properly.
If the refrigerant comes into contact with naked poisonous gases will be produced.
• Electrical work must be carried out by the electrician, strictly in ac-
cordance with national or regional electricity regulations.
Incorrect installation can cause electric shock, or personal injury.
•Make sure that earth leakage breaker and circuit breaker of appropriate ca-
pacities are installed.
Circuit breaker should be able to disconnect all poles under over current. Absence of appropriate
breakers can cause electric shock, personal injury or property damage.
•Be sure to switch off the power source in the event of installation, mainte-
nance or service.
If the power source is not switched off, there is a risk of electric shock, unit failure or personal injury.
•Be sure to tighten the cables securely in terminal block and relieve the ca-
bles properly to prevent overloading the terminal blocks.
Loose connections or cable mountings can cause anomalous heat production or
•Do not process, splice or modify the power cable, or share the socket with
other power plugs.
Improper power cable or power plug can cause or electric shock due to poor connection, insuf-
insulation or over-current.
•Do not perform any change in protective device or its setup condition yourself.
Changing protective device can cause electric shock, or burst.
•Be sure to clamp the cables properly so that they do not touch any internal
component of the unit.
If cables touch any internal component, it can cause overheating and
•Be sure to install service cover properly.
Improper installation can cause electric shock or due to intrusion of dust or water.
•Be sure to use the prescribed power and connecting cables for electrical work.
Using improper cables can cause electric leak or
•This appliance must be connected to main power source by means of a cir-
cuit breaker or switch with a contact separation of at least 3mm.
Improperelectrical work can cause unit failure or personal injury.
• When plugging this unit, a plug conforming to the standard IEC60884-1 must be
used.
Using improper plug can cause electric shock or
•Be sure to connect the power source cable with power source properly.
Improper connection can cause intrusion of dust or water resulting in electric shock or
CAUTION
•Take care when carrying the unit by hand.
If the unit weight is more than 20kg, it must be carried by two or more persons.
Do not carry the unit by the plastic straps. Always use the carry handle.
•Do not install the outdoor unit in a location where insects and small animals
can inhabit.
Insects and small animals can enter the electrical parts and cause damage resulting in or per-
sonal injury. Instruct the user to keep the surroundings clean.
•If the outdoor unit is installed at height, make sure that there is enough space
for installation, maintenance and service.
space can result in personal injury due to falling from the height.
•Do not install the unit near the location where neighbours are bothered by
noise or air generating from the unit.
It can affect surrounding environment and cause a claim.
•Do not install in the locations where unit is directly exposed to corrosive
gases (like sulphide gas, chloride gas), sea breeze or salty atmosphere.
It can cause corrosion of heat exchanger and damage to plastic parts.
•Do not install the unit close to the equipments that generate electromagnetic
waves and/or high-harmonic waves.
Equipment such as inverters, standby generators, medical high frequency equipments and telecom-
munication equipments can affect the system, and cause malfunctions and breakdowns.
The system can also affect medical equipment and telecommunication equipment, and obstruct its
function or cause jamming.
•Do not install the unit in the locations where:
•There are heat sources nearby.
•Unit is directly exposed to rain or sunlight.
•There is any obstacle which can prevent smooth air circulation from inlet and outlet side of the unit.
•Unit is directly exposed to oil mist and steam such as kitchen.
• Chemical substances like ammonia (organic fertilizer), calcium chloride (snow melting agent) and
acid (sulfurous acid etc.), which can harm the unit, will generate or accumulate.
•Drain water can not be discharged properly.
•TV set or radio receiver is placed within 1m.
•Height above sea level is more than 1000m.
It can cause performance degradation, corrosion and damage of components, unit malfunction and
•Dispose of all packing materials properly.
Packing materials contain nails and wood which can cause personal injury.
Keep the polybag away from children to avoid the risk of suffocation.
•Do not put anything on the outdoor unit.
Object may fall causing property damage or personal injury.
• Do not touch the aluminum of the outdoor unit.
Aluminium temperature is high during heating operation. Touching can cause burn.
• Do not touch any refrigerant pipe with your hands when the system is in operation.
During operation the refrigerant pipes become extremely hot or extremely cold depending on the op-
erating condition. Touching pipes can cause personal injury like burn (hot/cold).
•Install isolator or disconnect switch on the power source wiring in accor-
dance with the local codes and regulations.
The isolator should be locked in OFF state in accordance with EN60204-1.
2. OUTDOOR UNIT INSTALLATION
NOTE
Do not step on a top and the service cover of the unit.
1. Haulage
•Always carry or move the unit with two or more persons.
•The right hand side of the unit as viewed from the front (outlet side) is heavier.
A person carrying the right hand side must take care of this fact. A person carrying the left hand side
must hold the handle provided on the front panel of the unit with his right hand and the corner column
section of the unit with his left hand.
•In the case of hoisting the unit, use nylon slings or ropes and protection pads for prevend damage of
the unit.
Heavy
Pad
CAUTION
When a unit is hauled, take care of its gravity center position which is shifted towards right hand side.
If the unit is not hauled properly, it can go off balance and fall resulting in serious injury.
2. Selecting the installation location
Select the suitable installation location where:
•Unit will be stable, horizontal and free of any vibration transmission.
•There is no obstacle which can prevent smooth air circulation from inlet and outlet side of the unit.
•There is enough space for service and maintenance of unit.
•Neighbours are not bothered by noise or air generating from the unit.
•Outlet air of the unit does not blow directly to animals or plants.
•Drain water can be discharged properly.
• There is no risk of gas leakage.
•There are no other heat sources nearby.
•Unit is not directly exposed to rain or sunlight.
•Unit is not directly exposed to oil mist and steam.
•Chemical substances like ammonia (organic fertilizer), calcium chloride (snow melting agent) and acid
(sulfurous acid etc.), which can harm the unit, will not generate or accumulate.
•Unit is not directly exposed to corrosive gases (like sulphide gas, chloride gas), sea breeze or salty
atmosphere.
•No TV set or radio receiver is placed within 1m.
•Unit is not affected by electromagnetic waves and/or high-harmonic waves generated by other
equipments.
•Strong wind does not blow against the unit outlet.
•Heavy snowfalls do not occur (If installed, provide proper protection to avoid snow accumulation).
NOTE
If the unit is installed in the area where there is a possibility of strong wind or snow accumulation, the
following measures are required.
(1) Location of strong wind
•Place the unit with its outlet side facing the wall. •Place the unit such that the direction of air from
the outlet gets perpendicular to the wind direc-
tion.
Over 500mm
Wind
direction
Wind
direction
(2) Location of snow accumulation
•Install the unit on the base so that the bottom is
higher than snow cover surface.
•Install the unit under eaves or provide the roof
on site.
3. Installation space
•There must be 1 meter or larger space between the unit and the wall in at least 1 of the 4 sides.
Walls surrounding the unit from 4 sides is not acceptable. The wall height on the outlet side should
be 1200 mm or less. Refer to the following and table for details.
Example
installation
Size
L1
L2
L3
L4
(mm)
Open
300
100
250
Open
250
150
250
500
Open
100
250
Ι ΙΙ ΙΙΙ
Inlet
(
Service
space
)
Inlet
Outlet
L3
L4
L1
L2
NOTE
When more than one unit are installed side by side, provide a 250mm or wider interval between them
as a service space.
CAUTION
When more than one unit are installed in parallel directions, provide inlet space so that short-
circuiting may not occur.
4. Drain piping work (If necessary)
Carry out drain piping work by using a drain elbow and a drain grommet supplied separately as acces-
sories if condensed water needs to be drained out.
(1) Install drain elbow and drain grommet.
(2) Seal around the drain elbow and drain grommet with putty or adequate caulking material.
Grommet
Drain elbow
Grommet
Drain hose
(To be procured on the installer’s part)
Do not put a grommet on this hole.
This is a supplementary drain hole to discharge drain water, when a large amount of it is gathered.
CAUTION
Do not use drain elbow and drain grommet if there is a possibility to have several consecutive days of
sub zero temperature. (There is a risk of drain water freezing inside and blocking the drain.)
5. Installation
• Install the unit on a level base.
• While installing the unit, keep space and the unit’s legs with 4 anchor bolts as shown in the
below. The protrusion of an anchor bolt from the foundation surface must be kept within 15mm.
200 mm over
If drain piping work was carried
out keep the clearance more
than 100mm.
580 mm 380 mm
15 mm
Anchor bolt (M10-12) ×4 pcs
CAUTION
• Install the unit properly so that it does not fall over during earthquake, strong wind, etc.
• Make sure that unit is installed on a level base. Installing unit on uneven base may result in unit
malfunction.
3. PREPARATION FOR WORK
1. Removing service cover
Remove the screw. Slide service cover downwards and remove it.
Screw
Screw
Service
cover
2. Removing terminal cover
Remove the screw and take out terminal cover.
Screw
Terminal
cover
RPC012A920C
Model SCM71/80
R410A REFRIGERANT USED
1. ACCESSORIES AND TOOLS
Locally procured parts Tools for installation work
(a) Anchor bolt(M10-M12)×4 pcs Plus headed driver Spanner wrench Vacuum pump*
(b) Putty Knife Torque wrench [14.0-62.0N•m(1.4-6.2kgf•m)] Gauge manifold *
(c) Electrical tape Saw Wrench key (Hexagon) [4mm] Charge hose *
(d) Connecting pipe Tape measure Flaring tool set * Vacuum pump adapter*
(Anti-reverse type)
(e) Connecting cable
(f) Power cable Pipe cutter Flare adjustment gauge Gas leak detector *
(g) Clamp and screw (for work) *Designed for R410A
Standard accessories
(Supplied with outdoor unit) Q’ty
(1) Drain grommet 2
(2) Drain elbow 1
(3)
Variable diameter joint
ø9.52→ø12.7
(Inside service cover)
2
NOTE
Variable diameter joint is inside
service cover. Remove it at a
safe place before carring in the
installation location to prevent
unexpected fall of parts.
RPC012A920C.pdf 17.11.1 5:08:28 PM

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16
-
'17 • SCM-T-225
4. CONNECTING PIPING WORK
1. Restrictions on unit installation
Abide by the following restrictions on unit installation.
Improper installation can cause compressor failure or performance degradation.
Piping length One indoor unit MAX 25m
All indoor unit MAX 70m
Hight difference MAX
25m
MAX 20m
MAX 20m
Outdoo r
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Length of chargeless
refrigerant pipe 40m
2. Preparation of connecting pipe
2.1. Selecting connecting pipe
Select connecting pipe according to the following table.
Indoor unit Model 20/25/35 Model 50/60
Gas pipe ø9.52 ø12.7
Liquid pipe ø6.35 ø6.35
•Pipe wall thickness must be greater than or equal to 0.8 mm.
•Pipe material must be O-type (Phosphorus deoxidized seamless copper pipe ICS 23.040.15, ICS
77.150.30).
2.2. Cutting connecting pipe
(1) Cut the connecting pipe to the required length with pipe cutter.
(2) Hold the pipe downward and remove the burrs. Make sure that no foreign material enters the pipe.
(3) Cover the connecting pipe ends with the tape.
3. Piping work
Check that both liquid and gas service valves are fully closed.
Carry out the piping work with service valves fully closed.
Liquid service valve
Gas service valve
3.1. Flaring pipe
(1) Take out nuts from the service valves of outdoor unit.
If a 5.0, 6.0 kw class indoor unit (gas side pipe 12.7) is going to be connected to the service valves
(9.52), variable joints available as accessories must be applied to the gas side service valves. Se-
curely the copper packing between the service valve and the variable diameter joint to
shifting.
Engage nuts onto connecting pipes.
Service
valve
Liquid side service valve ( 6.35)
6.35 pipe 50,60 model
Indoor unit
Gas side service
valve ( 9.52) Copper packing Variable diameter joint
( 9.52 - 12.7)
12.7 pipe
(2) Flare the pipes according to table and shown below.
Flare dimensions for R410A are different from those for conventional refrigerant.
Although it is recommended to use the tools designed for R410A, conventional
tools can also be used by adjusting the measurement of protrusion B with a adjustment gauge.
A
Copper pipe
outer diameter A 0
–0.4
B
Copper pipe
outer diameter
Rigid (clutch) type
R410A Conventional
ø6.35 9.1 ø6.35
0-0.5 1.0-1.5ø9.52 13.2 ø9.52
ø12.7 16.6 ø12.7
3.2. Connecting pipes
(1) Connect pipes on both liquid and gas sides.
Service valve
for room D
Service valve
for room C
Service valve
for room B
Service valve
for room A
(2) Tighten nuts to torque shown in the table below.
Service valve size (mm) Tightening torque (N·m)
ø6.35 (1/4") 14-18
ø9.52 (3/8") 34-42
ø12.7 (1/2") 49-61
Do not hold the valve cap area with a spanner
CAUTION
•Do not apply refrigerating machine oil to the surface. It can cause refrigerant leakage.
•Do not apply excess torque to the nuts. The nuts may crack resulting in refrigerant leakage.
4. Evacuation
(1) Connect vacuum pump to gauge manifold. Connect charge hose of gauge manifold to a service port
of outdoor unit.
(2) Run the vacuum pump for at least one hour after the vacuum gauge shows -0.1MPa (–76cm Hg).
(3) that the vacuum gauge indicator does not rise even if the system is left for 15 minutes or more.
Vacuum gauge indicator will rise if the system has moisture left inside or has a leakage point.
Check the system for the leakage point. If leakage point is found, repair it and return to (1) again.
(4) Close the Handle Lo and stop the vacuum pump.
Keep this state for a few minutes to make sure that the compound pressure gauge pointer does not
swing back.
(5) Remove valve caps from liquid service valve and gas operation valve.
(6) Turn the liquid service valve's rod 90 degree counterclockwise with a hexagonal wrench key to
open valve.
Close it after 5 seconds, and check for gas leakage.
Using soapy water, check for gas leakage from indoor unit's and outdoor unit's and valve rods.
Wipe off all the water after completing the check.
(7) Disconnect charging hose from gas service valve's service port and fully open liquid and gas service
valves. (Do not attempt to turn valve rod beyond its stop.)
(8) Tighten service valve caps and service port cap to the torque shown in the table below.
Service valve size (mm) Service valve cap tightening
torque (N·m)
Service port cap tightening
torque (N·m)
ø6.35 (1/4") 20-30 10-12ø9.52 (3/8")
ø12.7 (1/2") 25-35
(9) Repeat the above steps (1) to (8) for all connected indoor units.
Charge hose
Handle Lo
Valve cap
Liquid service valve
Gas service valve
Service port
Compound pressure gauge
Pressure gauge
Gauge manifold
Handle Hi
Vacuum pump
CAUTION
•To prevent the entering of different oil into the refrigeration system, do not use tools designed for any
other refrigerant type (R22, R407C, etc.).
•
To prevent vacuum pump oil from entering into the refrigerant system, use a prevention adapter.
5. Additional refrigerant charge
Additional refrigerant charge is required only when connecting pipe length exceeds 40 m.
5.1 Calculating additional refrigerant charge
Additional refrigerant charge can be calculated using the formula given below.
Additional refrigerant charge (g) = { Connecting pipe length (m) – Factory charged length 40 (m) } x 20 (g/m)
NOTE
• If additional refrigerant charge calculation result is negative, there is no need to remove the refrigerant.
•If refrigerant recharge is required for the unit with connecting pipe length 40m or shorter, charge the
factory charged amount as shown in the table below.
Model SCM71/80
Factory charged amount(kg) 3.15
5.2 Charging refrigerant
(1) Charge the R410A refrigerant in liquid phase from service port with both liquid and gas service
valves shut. Since R410A refrigerant must be charged in the liquid phase, make sure that refriger-
ant is discharged from the cylinder in the liquid phase all the time.
(2) When it is to charge a required refrigerant amount, fully open both liquid and gas service
valves and charge refrigerant, while running the unit in the cooling mode. When refrigerant is
charged with the unit being run, complete the charge operation within 30 minutes.
(3) Write the additional refrigerant charge calculated from the connecting pipe length on the label
attached on the service cover.
CAUTION
Running the unit with an quantity of refrigerant for a long time can cause unit malfunction.
5. ELECTRICAL WIRING WORK
WARNING
• Make sure that all the electrical work is carried out in accordance with the national or regional
electrical standards.
• Make sure that the earth leakage breaker and circuit breaker of appropriate capacities are installed
(Refer to the table given below).
• Do not turn on the power until the electrical work is completed.
• Do not use a condensive capacitor for power factor improvement under any circumstances.
(It does not improve power factor. Moreover, it can cause an abnormal overheat accident).
Breaker
Model Phase Earth leakage breaker Circuit breaker
SCM71/80 Single phase Leakage current: 30mA,
0.1sec or less Over current: 25A
Main fuse
Model Parts No.
SCM71/80 250V 20A SSA564A136A
1.Preparing cable
(1) Selecting cable
Select the power source cable and connecting cable in accordance with the mentioned below.
(a) Power source cable
3-core* 2.5mm2or more, conformed with 60245 IEC57
When selecting the power source cable length, make sure that voltage drop is less than 2%.
If the wire length gets longer, increase the wire diameter.
(b) Connecting cable
4-core* 1.5mm2, conformed with 60245 IEC57
* 1 Earth wire is included (Yellow/Green).
(2) Arrange each wire length as shown below.
Make sure that each wire is stripped 10mm from the end.
<Power source cable> <Connecting cable> <Wire end>
Earth wire
40mm or more
30mm or more
40mm or more
Earth wir
e
30mm or more
10mm
(3) Attach round crimp-type terminal to each wire as shown in the below.
Select the size of round crimp-type terminal after considering the of terminal block and wire
diameter.
10mm
Round crimp-type terminal
Sleeve
CAUTION
Power source cable and connecting cable must conform to the mentioned in the manual.
Using cables with wrong may result in unit malfunction.
2.Connecting cable
(1) Remove the service cover and the terminal cover.
(2) Connect the cables according to the instructions and given below.
(a) Connect the earth wire of power source cable.
An earth wire must be connected before connecting the other wires of power source cable.
Keep the earth wire longer than the remaining two wires of power source cable.
(b) Connect the remaining two wires (N and L) of power source cable.
(c) Connect the wires of connecting cables. Make sure that for each wire, outdoor and indoor side
terminal numbers match. Terminal number A of the outdoor unit is used for A indoor unit and
terminal number B for B indoor unit respectively.
Earth wire shall be Yellow/Green (Y/G) in color and longer than other wires for safety reason.
(3) Fasten the cables properly with cable clamps so that no external force may work on terminal
connections.
Moreover, make sure that cables do not touch the piping, etc. When cables are connected, make
sure that all electrical components within the electrical component box are free of loose connector
coupling or terminal connection.
<Circuit diagram>
LN
Circuit
Power
source
breaker
Earth
leakage
breaker
Outdoor unit
1 2 31 2 3 1 2 3 1 2 3
1 2 31 2 3 1 2 3
unit A unit B unit C
unit A unit B
Indoor unit
unit C
1 2 3
unit D
unit D
Connecting
cable
6. FINISHING WORK
NOTE
● Make sure to match the piping and
wiring from each unit to the outdoor
unit.
●
Be careful because if connections
are wrong, normal operation cannot
be achieved and may damage the
compressor.
1. Heating and condensation prevention
(1) Dress the connecting pipes (both liquid and gas pipes) with insulation to prevent it from heating
and dew condensation.
Use the heat insulating material which can withstand 120°C or higher temperature. Make sure that
insulation is wrapped tightly around the pipes and no gap is left between them.
(2) Wrap the refrigerant pipings of indoor unit with indoor unit heat insulation using tape.
(3) Cover the joints (indoor side) with the indoor unit heat insulation and wrap it with
an insulation pad (standard accessory provided with indoor unit).
(4) Wrap the connecting pipes, connecting cable and drain hose with the tape.
(2) (3) (4)
Tape
Insulation pad
Position it so that the slit area faces upward.
Connecting cable
Liquid pip
e
Drain hose
Gas pipe
Insulation
Tape
NOTE
Locations where relative humidity exceeds 70%, both liquid and gas pipes need to be dressed with 20mm
or thicker heat insulation materials.
CAUTION
• Improper insulation can cause condensate(water) formation during cooling operation.
Condensate can leak or drip causing damage to household property.
• Poor heat insulating capacity can cause pipe outer surface to reach high temperature during heating
operation. It can cause cable deterioration and personal injury.
2.Finishing work
(1) Make sure that the exterior portion of
connecting pipes, connecting cable and
drain hose is wrapped properly with
tape. Shape the connecting pipes to
match with the contours of the pipe as-
sembly route.
(2) Fix the pipe assembly with the wall us-
ing clamps and screws. Pipe assembly
should be anchored every 1.5m or less
to isolate the vibration.
(3) Install the terminal cover and the service
cover securely. Water may enter the unit
if service cover is not installed properly,
resulting in unit malfunction and failure.
CAUTION
Make sure that the connecting pipes do not touch the components within the unit. If pipes touch the
internal components, it may generate abnormal sounds and/or vibrations.
7. PUMP DOWN
(1) Connect charge hose of gauge manifold to a service port of outdoor unit.
(2) Close the liquid service valves for all connected indoor units with hexagonal wrench key.
(3) Fully open the gas service valves with hexagonal wrench key.
(4) Carry out forced cooling operation for all connected indoor units (For forced cooling operation procedure,
refer to indoor unit installation manual).
(5) When the low pressure gauge becomes 0.01MPa, close the gas service valves and stop forced cooling
operation.
Gauge manifold
Charge hose
Service port
8. INSTALLATION TEST CHECK POINTS
After the installation work, check the following points again before turning on the power.
Conduct test run (Refer to indoor unit installation manual) and ensure that the unit operates properly.
RPC012A920C
Power source voltage complies with the rated voltage of air-conditioner.
Earth leakage breaker and circuit breaker are installed.
Power cable and connecting cable are securely to the terminal block.
Both liquid and gas service valves are fully open.
No gas leaks from the joints of the service valves.
Indoor and outdoor side pipe joints have been insulated.
Drain hose (if installed) is properly.
Screw of the service cover is tightened properly.
View of Terminal block
unit A unit B
unit C unit D
POWER
source
Indoor unit Indoor unit
unit D
unit C
unit B
unit A
Outdoor
unit
unit D
unit C
unit B
unit A
Outdoor
unit
D
C
A
B
D
C
A
B
Piping
Wiring
Cable
clamp
Cable
clamp
Power
source
cable
Connecting
cable
Pipe
assembly
Clamp
Screw
prevent
RPC012A920C.pdf 17.11.3 6:03:19 PM

-
17
-
'17 • SCM-T-225
4. CONNECTING PIPING WORK
1. Restrictions on unit installation
Abide by the following restrictions on unit installation.
Improper installation can cause compressor failure or performance degradation.
Piping length One indoor unit MAX 25m
All indoor unit MAX 70m
Hight difference MAX
25m
MAX 20m
MAX 20m
Outdoo r
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Length of chargeless
refrigerant pipe 40m
2. Preparation of connecting pipe
2.1. Selecting connecting pipe
Select connecting pipe according to the following table.
Indoor unit Model 20/25/35 Model 50/60
Gas pipe ø9.52 ø12.7
Liquid pipe ø6.35 ø6.35
•Pipe wall thickness must be greater than or equal to 0.8 mm.
•Pipe material must be O-type (Phosphorus deoxidized seamless copper pipe ICS 23.040.15, ICS
77.150.30).
2.2. Cutting connecting pipe
(1) Cut the connecting pipe to the required length with pipe cutter.
(2) Hold the pipe downward and remove the burrs. Make sure that no foreign material enters the pipe.
(3) Cover the connecting pipe ends with the tape.
3. Piping work
Check that both liquid and gas service valves are fully closed.
Carry out the piping work with service valves fully closed.
Liquid service valve
Gas service valve
3.1. Flaring pipe
(1) Take out nuts from the service valves of outdoor unit.
If a 5.0, 6.0 kw class indoor unit (gas side pipe 12.7) is going to be connected to the service valves
(9.52), variable joints available as accessories must be applied to the gas side service valves. Se-
curely the copper packing between the service valve and the variable diameter joint to
shifting.
Engage nuts onto connecting pipes.
Service
valve
Liquid side service valve ( 6.35)
6.35 pipe 50,60 model
Indoor unit
Gas side service
valve ( 9.52) Copper packing Variable diameter joint
( 9.52 - 12.7)
12.7 pipe
(2) Flare the pipes according to table and shown below.
Flare dimensions for R410A are different from those for conventional refrigerant.
Although it is recommended to use the tools designed for R410A, conventional
tools can also be used by adjusting the measurement of protrusion B with a adjustment gauge.
A
Copper pipe
outer diameter A 0
–0.4
B
Copper pipe
outer diameter
Rigid (clutch) type
R410A Conventional
ø6.35 9.1 ø6.35
0-0.5 1.0-1.5ø9.52 13.2 ø9.52
ø12.7 16.6 ø12.7
3.2. Connecting pipes
(1) Connect pipes on both liquid and gas sides.
Service valve
for room D
Service valve
for room C
Service valve
for room B
Service valve
for room A
(2) Tighten nuts to torque shown in the table below.
Service valve size (mm) Tightening torque (N·m)
ø6.35 (1/4") 14-18
ø9.52 (3/8") 34-42
ø12.7 (1/2") 49-61
Do not hold the valve cap area with a spanner
CAUTION
•Do not apply refrigerating machine oil to the surface. It can cause refrigerant leakage.
•Do not apply excess torque to the nuts. The nuts may crack resulting in refrigerant leakage.
4. Evacuation
(1) Connect vacuum pump to gauge manifold. Connect charge hose of gauge manifold to a service port
of outdoor unit.
(2) Run the vacuum pump for at least one hour after the vacuum gauge shows -0.1MPa (–76cm Hg).
(3) that the vacuum gauge indicator does not rise even if the system is left for 15 minutes or more.
Vacuum gauge indicator will rise if the system has moisture left inside or has a leakage point.
Check the system for the leakage point. If leakage point is found, repair it and return to (1) again.
(4) Close the Handle Lo and stop the vacuum pump.
Keep this state for a few minutes to make sure that the compound pressure gauge pointer does not
swing back.
(5) Remove valve caps from liquid service valve and gas operation valve.
(6) Turn the liquid service valve's rod 90 degree counterclockwise with a hexagonal wrench key to
open valve.
Close it after 5 seconds, and check for gas leakage.
Using soapy water, check for gas leakage from indoor unit's and outdoor unit's and valve rods.
Wipe off all the water after completing the check.
(7) Disconnect charging hose from gas service valve's service port and fully open liquid and gas service
valves. (Do not attempt to turn valve rod beyond its stop.)
(8) Tighten service valve caps and service port cap to the torque shown in the table below.
Service valve size (mm) Service valve cap tightening
torque (N·m)
Service port cap tightening
torque (N·m)
ø6.35 (1/4") 20-30 10-12ø9.52 (3/8")
ø12.7 (1/2") 25-35
(9) Repeat the above steps (1) to (8) for all connected indoor units.
Charge hose
Handle Lo
Valve cap
Liquid service valve
Gas service valve
Service port
Compound pressure gauge
Pressure gauge
Gauge manifold
Handle Hi
Vacuum pump
CAUTION
•To prevent the entering of different oil into the refrigeration system, do not use tools designed for any
other refrigerant type (R22, R407C, etc.).
•
To prevent vacuum pump oil from entering into the refrigerant system, use a prevention adapter.
5. Additional refrigerant charge
Additional refrigerant charge is required only when connecting pipe length exceeds 40 m.
5.1 Calculating additional refrigerant charge
Additional refrigerant charge can be calculated using the formula given below.
Additional refrigerant charge (g) = { Connecting pipe length (m) – Factory charged length 40 (m) } x 20 (g/m)
NOTE
• If additional refrigerant charge calculation result is negative, there is no need to remove the refrigerant.
•If refrigerant recharge is required for the unit with connecting pipe length 40m or shorter, charge the
factory charged amount as shown in the table below.
Model SCM71/80
Factory charged amount(kg) 3.15
5.2 Charging refrigerant
(1) Charge the R410A refrigerant in liquid phase from service port with both liquid and gas service
valves shut. Since R410A refrigerant must be charged in the liquid phase, make sure that refriger-
ant is discharged from the cylinder in the liquid phase all the time.
(2) When it is to charge a required refrigerant amount, fully open both liquid and gas service
valves and charge refrigerant, while running the unit in the cooling mode. When refrigerant is
charged with the unit being run, complete the charge operation within 30 minutes.
(3) Write the additional refrigerant charge calculated from the connecting pipe length on the label
attached on the service cover.
CAUTION
Running the unit with an quantity of refrigerant for a long time can cause unit malfunction.
5. ELECTRICAL WIRING WORK
WARNING
• Make sure that all the electrical work is carried out in accordance with the national or regional
electrical standards.
• Make sure that the earth leakage breaker and circuit breaker of appropriate capacities are installed
(Refer to the table given below).
• Do not turn on the power until the electrical work is completed.
• Do not use a condensive capacitor for power factor improvement under any circumstances.
(It does not improve power factor. Moreover, it can cause an abnormal overheat accident).
Breaker
Model Phase Earth leakage breaker Circuit breaker
SCM71/80 Single phase Leakage current: 30mA,
0.1sec or less Over current: 25A
Main fuse
Model Parts No.
SCM71/80 250V 20A SSA564A136A
1.Preparing cable
(1) Selecting cable
Select the power source cable and connecting cable in accordance with the mentioned below.
(a) Power source cable
3-core* 2.5mm2or more, conformed with 60245 IEC57
When selecting the power source cable length, make sure that voltage drop is less than 2%.
If the wire length gets longer, increase the wire diameter.
(b) Connecting cable
4-core* 1.5mm2, conformed with 60245 IEC57
* 1 Earth wire is included (Yellow/Green).
(2) Arrange each wire length as shown below.
Make sure that each wire is stripped 10mm from the end.
<Power source cable> <Connecting cable> <Wire end>
Earth wire
40mm or more
30mm or more
40mm or more
Earth wir
e
30mm or more
10mm
(3) Attach round crimp-type terminal to each wire as shown in the below.
Select the size of round crimp-type terminal after considering the of terminal block and wire
diameter.
10mm
Round crimp-type terminal
Sleeve
CAUTION
Power source cable and connecting cable must conform to the mentioned in the manual.
Using cables with wrong may result in unit malfunction.
2.Connecting cable
(1) Remove the service cover and the terminal cover.
(2) Connect the cables according to the instructions and given below.
(a) Connect the earth wire of power source cable.
An earth wire must be connected before connecting the other wires of power source cable.
Keep the earth wire longer than the remaining two wires of power source cable.
(b) Connect the remaining two wires (N and L) of power source cable.
(c) Connect the wires of connecting cables. Make sure that for each wire, outdoor and indoor side
terminal numbers match. Terminal number A of the outdoor unit is used for A indoor unit and
terminal number B for B indoor unit respectively.
Earth wire shall be Yellow/Green (Y/G) in color and longer than other wires for safety reason.
(3) Fasten the cables properly with cable clamps so that no external force may work on terminal
connections.
Moreover, make sure that cables do not touch the piping, etc. When cables are connected, make
sure that all electrical components within the electrical component box are free of loose connector
coupling or terminal connection.
<Circuit diagram>
LN
Circuit
Power
source
breaker
Earth
leakage
breaker
Outdoor unit
1 2 31 2 3 1 2 3 1 2 3
1 2 31 2 3 1 2 3
unit A unit B unit C
unit A unit B
Indoor unit
unit C
1 2 3
unit D
unit D
Connecting
cable
6. FINISHING WORK
NOTE
● Make sure to match the piping and
wiring from each unit to the outdoor
unit.
●
Be careful because if connections
are wrong, normal operation cannot
be achieved and may damage the
compressor.
1. Heating and condensation prevention
(1) Dress the connecting pipes (both liquid and gas pipes) with insulation to prevent it from heating
and dew condensation.
Use the heat insulating material which can withstand 120°C or higher temperature. Make sure that
insulation is wrapped tightly around the pipes and no gap is left between them.
(2) Wrap the refrigerant pipings of indoor unit with indoor unit heat insulation using tape.
(3) Cover the joints (indoor side) with the indoor unit heat insulation and wrap it with
an insulation pad (standard accessory provided with indoor unit).
(4) Wrap the connecting pipes, connecting cable and drain hose with the tape.
(2) (3) (4)
Tape
Insulation pad
Position it so that the slit area faces upward.
Connecting cable
Liquid pip
e
Drain hose
Gas pipe
Insulation
Tape
NOTE
Locations where relative humidity exceeds 70%, both liquid and gas pipes need to be dressed with 20mm
or thicker heat insulation materials.
CAUTION
• Improper insulation can cause condensate(water) formation during cooling operation.
Condensate can leak or drip causing damage to household property.
• Poor heat insulating capacity can cause pipe outer surface to reach high temperature during heating
operation. It can cause cable deterioration and personal injury.
2.Finishing work
(1) Make sure that the exterior portion of
connecting pipes, connecting cable and
drain hose is wrapped properly with
tape. Shape the connecting pipes to
match with the contours of the pipe as-
sembly route.
(2) Fix the pipe assembly with the wall us-
ing clamps and screws. Pipe assembly
should be anchored every 1.5m or less
to isolate the vibration.
(3) Install the terminal cover and the service
cover securely. Water may enter the unit
if service cover is not installed properly,
resulting in unit malfunction and failure.
CAUTION
Make sure that the connecting pipes do not touch the components within the unit. If pipes touch the
internal components, it may generate abnormal sounds and/or vibrations.
7. PUMP DOWN
(1) Connect charge hose of gauge manifold to a service port of outdoor unit.
(2) Close the liquid service valves for all connected indoor units with hexagonal wrench key.
(3) Fully open the gas service valves with hexagonal wrench key.
(4) Carry out forced cooling operation for all connected indoor units (For forced cooling operation procedure,
refer to indoor unit installation manual).
(5) When the low pressure gauge becomes 0.01MPa, close the gas service valves and stop forced cooling
operation.
Gauge manifold
Charge hose
Service port
8. INSTALLATION TEST CHECK POINTS
After the installation work, check the following points again before turning on the power.
Conduct test run (Refer to indoor unit installation manual) and ensure that the unit operates properly.
RPC012A920C
Power source voltage complies with the rated voltage of air-conditioner.
Earth leakage breaker and circuit breaker are installed.
Power cable and connecting cable are securely to the terminal block.
Both liquid and gas service valves are fully open.
No gas leaks from the joints of the service valves.
Indoor and outdoor side pipe joints have been insulated.
Drain hose (if installed) is properly.
Screw of the service cover is tightened properly.
View of Terminal block
unit A unit B
unit C unit D
POWER
source
Indoor unit Indoor unit
unit D
unit C
unit B
unit A
Outdoor
unit
unit D
unit C
unit B
unit A
Outdoor
unit
D
C
A
B
D
C
A
B
Piping
Wiring
Cable
clamp
Cable
clamp
Power
source
cable
Connecting
cable
Pipe
assembly
Clamp
Screw
prevent
RPC012A920C.pdf 17.11.3 6:03:19 PM

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2. INDOOR UNITS
2.1 Specifications
(1) Wall mounted type (SRK)
(a) Models SRK20, 25, 35, 50, 60ZSX-S
B
RWA000Z269
Model
Item SRK20ZSX-S
Power source 1 Phase, 220−240 V, 50Hz/220V, 60Hz
Operation data
Nominal cooling capacity (range) kW 2.0
Nominal heating capacity (range) kW 3.0
Sound power level Cooling
dB(A)
53
Heating 53
Sound pressure level
Cooling Hi: 38 Me: 31 Lo: 24 ULo: 19
Heating Hi: 38 Me: 32 Lo: 25 ULo: 19
Silent mode sound pressure level —
Exterior dimensions (Height x Width x Depth) mm 305 x 920 x 220
Exterior appearance
( Munsell color )
Fine snow
( 8.0Y 9.3/0.1 ) near equivalent
Net weight kg 13
Heat exchanger Louver fins & inner grooved tubing
Fan type & Q'ty Tangential fan x 1
Fan motor (Starting method) W 42 x1 (Direct drive)
Air flow Cooling m3/min Hi: 11.3 Me: 9.1 Lo: 6.0 ULo: 5.0
Heating Hi: 12.2 Me: 10.3 Lo: 7.2 ULo: 5.4
Available external static pressure Pa 0
Outside air intake Not possible
Air filter, Quality / Quantity Polypropylene net ( washable ) x 2
Shock & vibration absorber Rubber sleeve (for fan motor)
Operation control
Remote control Wireless remote control
Room temperature control Microcomputer thermostat
Operation display RUN: Green, TIMER: Yellow, ECO: Blue
Safety equipments Frost protection, Serial signal error protection, Indoor fan motor error protection
Installation data
Refrigerant piping size ( O.D ) mm Liquid line: φ6.35 ( 1/4" ) Gas line: φ9.52 ( 3/8" )
Connecting method Flare connection
Attached length of piping m Liquid line : 0.55 / Gas line : 0.48
Insulation for piping Necessary (Both sides), independent
Drain hose Hose connectable ( VP16 )
Drain pump, max lift height mm —
Interconnecting wires Size x Core number 1.5mm2x 4 cores ( Including earth cable ) / Terminal block ( Screw fixing type )
IP number IPX0
Standard accessories
Mounting kit, Clean filter ( Allergen clear filter x 1, Photocatalytic washable deodorizing filter x 1 )
Option parts Interface kit ( SC-BIKN2-E )
Notes (1) The data are measured at the following conditions.
Item
Operation
Indoor air temperature Outdoor air temperature Standards
DB WB DB WB
Cooling 27˚C 19˚C 35˚C 24˚C ISO5151-T1
Heating 20˚C — 7˚C 6˚C
(2) This air-conditioner is manufactured and tested in conformity with the ISO.
(3) Sound level indicates the value in an anechoic chamber. During operation these values are somewhat higher
due to ambient conditions.
The pipe length is 5m.
Adapted to RoHS directive

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19
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'17 • SCM-T-225
B
RWA000Z269
Model
Item SRK25ZSX-S
Power source 1 Phase, 220−240 V, 50Hz/220V, 60Hz
Operation data
Nominal cooling capacity (range) kW 2.5
Nominal heating capacity (range) kW 3.4
Sound power level Cooling
dB(A)
55
Heating 56
Sound pressure level
Cooling Hi: 39 Me: 33 Lo: 25 ULo: 19
Heating Hi: 40 Me: 34 Lo: 27 ULo: 19
Silent mode sound pressure level —
Exterior dimensions (Height x Width x Depth) mm 305 x 920 x 220
Exterior appearance
( Munsell color )
Fine snow
( 8.0Y 9.3/0.1 ) near equivalent
Net weight kg 13
Heat exchanger Louver fins & inner grooved tubing
Fan type & Q'ty Tangential fan x 1
Fan motor (Starting method) W 42 x1 (Direct drive)
Air flow Cooling m3/min Hi: 12.2 Me: 10.0 Lo: 6.7 ULo: 5.0
Heating Hi: 12.8 Me: 11.0 Lo: 7.8 ULo: 5.4
Available external static pressure Pa 0
Outside air intake Not possible
Air filter, Quality / Quantity Polypropylene net ( washable ) x 2
Shock & vibration absorber Rubber sleeve (for fan motor)
Operation control
Remote control Wireless remote control
Room temperature control Microcomputer thermostat
Operation display RUN: Green, TIMER: Yellow, ECO: Blue
Safety equipments Frost protection, Serial signal error protection, Indoor fan motor error protection
Installation data
Refrigerant piping size ( O.D ) mm Liquid line: φ6.35 ( 1/4" ) Gas line: φ9.52 ( 3/8" )
Connecting method Flare connection
Attached length of piping m Liquid line : 0.55 / Gas line : 0.48
Insulation for piping Necessary (Both sides), independent
Drain hose Hose connectable ( VP16 )
Drain pump, max lift height mm —
Interconnecting wires Size x Core number 1.5mm2x 4 cores ( Including earth cable ) / Terminal block ( Screw fixing type )
IP number IPX0
Standard accessories
Mounting kit, Clean filter ( Allergen clear filter x 1, Photocatalytic washable deodorizing filter x 1 )
Option parts Interface kit ( SC-BIKN2-E )
Notes (1) The data are measured at the following conditions.
Item
Operation
Indoor air temperature Outdoor air temperature Standards
DB WB DB WB
Cooling 27˚C 19˚C 35˚C 24˚C ISO5151-T1
Heating 20˚C — 7˚C 6˚C
(2) This air-conditioner is manufactured and tested in conformity with the ISO.
(3) Sound level indicates the value in an anechoic chamber. During operation these values are somewhat higher
due to ambient conditions.
The pipe length is 5m.
Adapted to RoHS directive