Mitsubishi Electric Mr.Slim PKH-2FKA Operating manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGES·······················2
2. PART NAMES AND FUNCTIONS········3
3. SPECIFICATIONS·································5
4. DATA···················································13
5. OUTLINES AND DIMENSIONS··········20
6. WIRING DIAGRAM·····························24
7. REFRIGERANT SYSTEM DIAGRAM ······26
8. OPERATION FLOW-CHART··············28
9. MICROPROCESSOR CONTROL·······32
10. TROUBLESHOOTING························54
11. SYSTEM CONTROL ···························63
12. DISASSEMBLY PROCEDURE···········68
13. PARTS LIST········································71
14. OPTIONAL PARTS·····························80
Indoor unit
[ Model names ] [ Service Ref. ]
PKH-2FKA PKH-2FKA3
PKH-2.5FKA PKH-2.5FKA2
PKH-2.5FKA3
PKH-3FKA PKH-3FKA2
PKH-3FKA3
PKH-4FKSA PKH-4FKSA2
PKH-4FKSA3
No. OC132
REVISED EDITION-A
2001
Indoor unit
Wall Mounted
Series PKH
FILTER
CHECK MODE
CHECK
TEST RUN
REMOTE CONTROLLER
• PKH-2.5FKA3, PKH-3FKA3and
PKH-4FKSA3are added in
REVISED EDITION-A.
• Please void OC132 .
• This manual does not cover
outdoor units. When servicing
them, please refer to the service
manual No.OC128 REVISED
EDITION-C and this manual in
a set.
[Service Ref.]
PUH-2VKA2, PUH-2VKA3,
PUH-2NKA1, PUH-2NKA2,
PUH-2.5VKA2, PUH-2.5VKA3,
PUH-2.5NKA1, PUH-2.5NKA2,
PUH-3VKA2, PUH-3VKA3,
PUH-3YKA2, PUH-3YKA3,
PUH-3YKA4,
PUH-3NKA1, PUH-3NKA2,
PUH-4YKSA3, PUH-4YKSA4,
PUH-4TKSA1
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2
1TECHNICAL CHANGES
●PKH-2.5FKA2➔PKH-2.5FKA3
●PKH-3FKA2➔PKH-3FKA3
●PKH-4FKSA2➔PKH-4FKSA3
•NOSE shape has changed.
•UNDER PLATE shape has changed.
•TOP PLATE shape has changed.
•DRAIN PAN shape has changed.
•BOX ASSEMBLY shape has changed.
•The specifications of these power supply voltages have been added: 50Hz 220-230-240V;
50Hz 380-400-415V.
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3
PART NAMES AND FUNCTIONS
2
FILTER
CHECK MODE
CHECK
TEST RUN
● Indoor Unit
Air intake
Room air is suctioned
in here. (Removes dust and dirt from the intake air.)
Filter Air intake grille
Air outletAir outlet
Auto vane
Air flow can be changed to horizontally
by moving the Guide vane to the left or
right.
Guide vane
wbutton
This switches between continuous
operation and the timer operation
button
The sets the ventilation fan speed.
● Remote controller
● Once the operation of the unit is set, subsequent operations can only be performed by pressing the ON/OFF button repeat-
edly.
● Operation buttons
qbutton
This sets or switches the current
time, start time and stop time.
button
Press this button to switch the cooler
electronic dry (dehumidify), automat-
ic and heater modes.
iTEMP button
This sets the room temperature. The
temperature setting can be per-
formed in 1°C units.
Setting range :
Cooler 19°C to 30°C
Heater 17°C to 28°C
CHECK-TEST RUN button
Only press this button to perform an
inspection check or test operation.
Do not use it for normal operation
FILTER button
This resets the filter service indica-
tion display
jbutton
This adjusts the vertical angle of the
ventilation.
ON/OFF button
This switches between the operation
and stop modes each time it is
pressed. The lamp on this button
lights during operation.
The model name of the remote con-
troller is indicated.
PAR-JH241KA(2.5 ~ 4)
PAR-JH150KA(2)
button
This switches the horizontal fan
motion ON and OFF.
(This button does not operate in this
model.)
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4
Caution
●Only the display lights when the unit is stopped and power supplied to the unit.
●When power is turned ON for the first time the (CENTRAL CTRL) display appears to go off momentarily but this is not a
malfunction.
●When the central control remote control unit, which is sold separately, is used the ON-OFF button, button and i
TEMP button do not operate.
●“NOT AVAILABLE” is displayed when the button is pressed. This indicates that this room unit is not equipped with.
FILTER
CHECK MODE
CHECK
TEST RUN
CENTRALLY
CONTROLLED display
This indicates when the unit is con-
trolled by optional features such as
central control type remote controller.
wdisplay
This indicates when the continuous
operation and time operation modes
are set.
It also display the time for the timer
operation at the same time as when
it is set.
OPERATION MODE display
This indicates the operation mode.
STANDBY display
This indicates when the standby
mode is set from the time the sleep
operation starts until the heating air
is discharged.
DEFROST display
This indicates when the defrost oper-
ation is performed.
CHECK display
This indicates when a malfunction
has occurred in the unit which should
be checked.
Display
This lamp lights when electricity is
supplied to the unit.
—88°C display
This displays the selected setting
temperature.
rdisplay
The current time , start time and stop
time can be displayed in ten second
intervals by pressing the time switch
button. The start time or stop time is
always displayed during the timer
operation.
display
The selected fan speed is displayed.
●Display
In this display example on
the bottom left, a condition
where all display lamps light
is shown for explanation pur-
poses although this differs
from actual operation.
display
This display lights in the check mode
or when a test operation is per-
formed.
CHECK MODE
TEST RUN
—88°C display
The temperature of the suction air is
displayed during operation. The dis-
play range is 8° to 39°C. The display
flashes 8°C when the actual temper-
ature is less than 8° and flashes
39°C when the actual temperature is
greater than 39°C.
Operation lamp
This lamp lights during operation,
goes off when the unit stops and
flashes when a malfunction occurs.
jdisplay
This displays the air direction.
display
This lamp lights when the filter need
to be cleaned.
FILTER
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5
SPECIFICATIONS3
Item
Function
Capacity
Total input
Service Ref.
Power supply(phase,cycle,voltage)
External finish
Heat exchanger
Booster heater
Operation control & Thermostat
Noise level(Low-High)
Cond. drain connection. O.D.
Dimensions
Weight
Service Ref.
Power supply (phase, cycle, voltage)
External finish
Refrigerant control
Compressor
Heat exchanger
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Pipe size O.D.
Connection method
Between the indoor & outdoor unit
Input
Running current
Starting current
Fan(drive) ✕ No.Fan Fan motor output
Airflow(Low-High)
External static pressure
Input
Running current
Staring current
Model
Motor output
Starter type
Protection devices
Fan(drive)✕No.
Fan motor output
Airflow
Charge
Service Ref.
W
D
H
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
INDOOR UNITOUTDOOR UNIT
REFRIGERANT PIPING
W
Btu/h
kW
kW
A
A
kW
m3/X<CFM>
Pa(mmAq)
kW
>
A<in.>
A<in.>
A<in.>
A<in.>
kg<lbs>
>
A<in.>
A<in.>
A<in.>
A<in.>
A<in.>
kg<lbs>
kg<lbs>
kW
A
A
kW
kW
m3/X<CFM>

PKH-2FKA3
Cooling Heating
5,500 6,250
18,800 21,300
2.27
0.07
0.32
0.40
PKH-2FKA3
Single Phase, 50Hz, 220-230-240V
Munsell 3.4Y 7.7/0.8(White)
Plate fin coil
Line flow(direct) ✕1
0.030
10-13<353-459>
0(direct blow)
—
Remote controller & built-in
36-43
20<13/16>
1,250<49-3/16>
200<7-7/8>
300<11-13/16>
18<40>
PUH-2VKA2PUH-2VKA3
Single Phase, 50Hz, 220-230-240V
2.222.20 9.959.86 45
Munsell 5Y 7/1
Capillary tube
Hermetic
NH38VMD
1.7
Line start
Internal thermostat, HP switch
Plate fin coil
Propeller (direct) ✕1
0.065
45<1.590>
Reverse cycle
49
870(34-1/4)
295+24<11-5/8 add 1>
650<25-5/8>
64<141>
R22
2.2<4.9>
9.52<3/8>
15.88<5/8>
Flared
Flared
Max. 40m
Max. 40m
2.29
0.07
0.32
0.40
Fan
Note 1. Rating Conditions (JIS B 8616)
Cooling : Indoor : D.B. 27°C (80°F), W.B. 19°C (66°F)
Outdoor : D.B. 35°C (95°F), W.B. 24°C (75°F)
Heating : Indoor : D.B. 20°C (68°F)
Outdoor : D.B. 7°C (45°F), W.B. 6°C (43°F)
Note 2. Above data based on indicated voltage
Indoor Unit Single phase 240V 50Hz
Outdoor Unit Single phase 240V 50Hz
50Hz
OC132--1.qxp 1.11.8 10:42 AM Page 5

6
Item
Function
Capacity
Total input
Service Ref.
Power supply(phase,cycle,voltage)
External finish
Heat exchanger
Booster heater
Operation control & Thermostat
Noise level(Low-High)
Cond. drain connector. O.D.
Dimensions
Weight
Service Ref.
Power supply (phase, cycle, voltage)
External finish
Refrigerant control
Compressor
Heat exchanger
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Pipe size O.D.
Connection method
Between the indoor & outdoor unit
Input
Running current
Starting current
Fan(drive) ✕No.Fan Fan motor output
Airflow(Low-High)
External static pressure
Input
Running current
Staring current
Model
Motor output
Starter type
Protection devices
Fan(drive)✕No.
Fan motor output
Airflow
Charge
Service Ref.
W
D
H
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
INDOOR UNITOUTDOOR UNIT
REFRIGERANT PIPING
W
Btu/h
kW
kW
A
A
kW
m3/X<CFM>
Pa(mmAq)
kW
>
A<in.>
A<in.>
A<in.>
A<in.>
kg<lbs>
>
A<in.>
A<in.>
A<in.>
A<in.>
A<in.>
kg<lbs>
kg<lbs>
kW
A
A
kW
kW
m3/X<CFM>
PKH-2.5FKA2 PKH-2.5FKA3
Cooling Heating
6,500 7,200
22,200 24,600
2.56
0.095
0.44
0.80
PKH-2.5FKA2PKH-2.5FKA3
Single Phase, 50Hz, 220-230-240V
Munsell 3.4Y 7.7/0.8(White)
Plate fin coil
Line flow(direct) ✕2
0.040
15-20<530-706>
0(direct blow)
—
Remote controller & built-in
39-45
20<13/16>
1,400<55-1/8>
235<9-1/4>
340<13-3/8>
26<57>
PUH-2.5VKA2 PUH-2.5VKA3
Single Phase, 50Hz, 220-230-240V
2.232.46 9.7810.68 52
Munsell 5y 7/1
Capillary tube
Hermetic
NH41VMD
2.0
Line start
Internal thermostat, HP switch
Plate fin coil
Propeller (direct) ✕1
0.085
50<1,764>
Reverse cycle
52
870(34-1/4)
295+24<11-5/8 add 1>
850<33-7/16>
64<150>
R22
2.8<6.2>
9.52<3/8>
15.88<5/8>
Flared
Flared
Max. 50m
Max. 50m
2.33
0.095
0.44
0.80
Fan
Note 1. Rating Conditions (JIS B 8616)
Cooling : Indoor : D.B. 27°C (80°F), W.B. 19°C (66°F)
Outdoor : D.B. 35°C (95°F), W.B. 24°C (75°F)
Heating : Indoor : D.B. 20°C (68°F)
Outdoor : D.B. 7°C (45°F), W.B. 6°C (43°F)
Note 2. Above data based on indicated voltage
Indoor Unit Single phase 240V 50Hz
Outdoor Unit Single phase 240V 50Hz
50Hz
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7
Item
Function
Capacity
Total input
Service Ref.
Power supply(phase,cycle,voltage)
External finish
Heat exchanger
Booster heater
Operation control & Thermostat
Noise level(Low-High)
Cond. drain conn. O.D.
Dimensions
Weight
Service Ref.
Power supply (phase, cycle, voltage)
External finish
Refrigerant control
Compressor
Heat exchanger
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Pipe size O.D.
Connection method
Between the indoor & outdoor unit
Input
Running current
Starting current
Fan(drive) ✕No.
Fan motor output
Airflow(Low-High)
External static pressure
Input
Running current
Staring current
Model
Motor output
Starter type
Protection devices
Fan(drive)✕No.
Fan motor output
Airflow
Charge
Service Ref.
W
D
H
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
INDOOR UNITOUTDOOR UNIT
REFRIGERANT PIPING
W
Btu/h
kW
kW
A
A
kW
m3/X<CFM>
Pa(mmAq)
kW
>
A<in.>
A<in.>
A<in.>
A<in.>
kg<lbs>
>
A<in.>
A<in.>
A<in.>
A<in.>
A<in.>
kg<lbs>
kg<lbs>
kW
A
A
kW
kW
m3/X<CFM>
PKH-3FKA2 PKH-3FKA3
Cooling Heating
7,900 9,100
27,000 31,000
3.25
0.095
0.44
0.80
PKH-3FKA2PKH-3FKA3
Single Phase, 50Hz, 220-230-240V
Munsell 3.4Y 7.7/0.8(White)
Plate fin coil
Line flow(direct) ✕2
0.040
15-20<530-706>
0(direct blow)
—
Remote controller & built-in
39-45
20<13/16>
1,400<55-1/8>
235<9-1/4>
340<13-3/8>
26<57>
PUH-3VKA2PUH-3VKA3 / PUH-3YKA2PUH-3YKA3PUH-3YKA4
Single Phase, 50Hz, 220-230-240V/3Phase, 50Hz, 380-400-415V(4wires)
2.94/2.943.15/3.15 12.89/4.8113.82/5.16 58/37
Munsell 5Y 7/1
Capillary tube
Hermetic
w
2.2/2.4
Line start
Internal thermostat, HP switch/Thermal relay, thermal switch
Plate fin coil
Propeller (direct) ✕ 1
0.085
50<1,764>
Reverse cycle
52
870(34-1/4)
295+24<11-5/8 add 1>
850<33-7/16>
75<165>
R22
3.2<7.1>
9.52<3/8>
15.88<5/8>
Flared
Flared
Max. 50m
Max. 50m
3.04
0.095
0.44
0.80
Fan
Fan
wwPUH-3VKA2, PUH-3VKA3...... NH52VDA
PUH-3YKA2, .......................... NH52YDA
PUH-3YKA3, PUH-3YKA4.... NH52YDE
Note 1. Rating Conditions (JIS B 8616)
Cooling : Indoor : D.B. 27°C (80°F), W.B. 19°C (66°F)
Outdoor : D.B. 35°C (95°F), W.B. 24°C (75°F)
Heating : Indoor : D.B. 20°C (68°F)
Outdoor : D.B. 7°C (45°F), W.B. 6°C (43°F)
Note 2. Above data based on indicated voltage
Indoor Unit Single phase 240V 50Hz
Outdoor Unit Single phase 240V 50Hz
3 phase 415V 50Hz
50Hz
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8
Item
Function
Capacity
Total input
Service Ref.
Power supply(phase,cycle,voltage)
External finish
Heat exchanger
Booster heater
Operation control & Thermostat
Noise level(Low-High)
Cond. drain connector. O.D.
Dimensions
Weight
Service Ref.
Power supply (phase, cycle, voltage)
External finish
Refrigerant control
Compressor
Heat exchanger
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Pipe size O.D.
Connection method
Between the indoor & outdoor unit
Input
Running current
Starting current
Fan(drive) ✕No.
Fan motor output
Airflow(Low-High)
External static pressure
Input
Running current
Staring current
Model
Motor output
Starter type
Protection devices
Fan(drive)✕No.
Fan motor output
Airflow
Charge
Service Ref.
W
D
H
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
INDOOR UNITOUTDOOR UNIT
REFRIGERANT PIPING
W
Btu/h
kW
kW
A
A
kW
m3/X<CFM>
Pa(mmAq)
kW
>
A<in.>
A<in.>
A<in.>
A<in.>
kg<lbs>
>
A<in.>
A<in.>
A<in.>
A<in.>
A<in.>
kg<lbs>
kg<lbs>
kW
A
A
kW
kW
m3/X<CFM>
PKH-4FKSA2PKH-4FKSA3
Cooling Heating
9,500 10,700
32,400 36,500
3.31
0.114
0.53
0.90
PKH-4FKSA2 PKH-4FKSA3
Single Phase, 50Hz, 220-230-240V
Munsell 3.4Y 7.7/0.8(White)
Plate fin coil
Line flow(direct) ✕ 2
0.070
22-28<777-989>
0(direct blow)
—
Remote controller & built-in
41-46
20<13/16>
1,680<66-1/8>
235<9-1/4>
340<13-3/8>
30<66>
PUH-4YKSA3PUH-4YKSA4
3, 50Hz, 380-400-415V(4wires)
3.193.20 5.225.24 40
Munsell 5Y 7/1
Capillary tube
Hermetic
PUH-4YKSA3:NH56YDA PUH-4YKSA4:NH56YDE
2.7
Line start
Thermal relay, thermal switch, HP switch, anti-phase protector
Plate fin coil
Propeller (direct) ✕2
0.065+0.065
95<3,350>
Reverse cycle
54
870(34-1/4)
295+24<11-5/8 add 1>
1,258<49-1/2>
94<207>
R22
4.2<9.2>
9.52<3/8>
19.05<3/4>
Flared
Flared
Max. 50m
Max. 50m
3.30
0.114
0.53
0.90
Fan
Fan
Note 1. Rating Conditions (JIS B 8616)
Cooling : Indoor : D.B. 27°C (80°F), W.B. 19°C (66°F)
Outdoor : D.B. 35°C (95°F), W.B. 24°C (75°F)
Heating : Indoor : D.B. 20°C (68°F)
Outdoor : D.B. 7°C (45°F), W.B. 6°C (43°F)
Note 2. Above data based on indicated voltage
Indoor Unit Single phase 240V 50Hz
Outdoor Unit 3 phase 415V 50Hz
50Hz
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9
kg(lbs)
PKH-2FKA3
Service Ref.
Power supply(Phase, cycle, voltage)
External finish
Heat exchanger
Fan
Booster heater
Operation control & Thermostat
Noise level(Low-High)
Cond. drain connection O.D.
Dimensions
Weight
Service Ref.
Power supply(Phase, cycle, voltage)
External finish
Refrigerant control
Compressor
Heat exchanger
Fan
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Pipe size O.D.
Connection method
Between the indoor & outdoor units
Indoor side
Outdoor side
Height difference
Piping length
Input
Running current
Starting current
Fan(drive)oNo.
Fan motor output
Airflow(Low-High)
External static pressure
Input
Running current
Starting current
Model
Motor output
Starter type
Protection devices
Fan(drive)oNo.
Fan motor output
Airflow
Charge
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
W
D
H
Function
Total input
Capacity
dB
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
W
D
H
INDOOR UNITOUTDOOR UNIT
REFRIGERANT
PIPING
Item Service Ref.
W
Btu/h
kW
kW
A
A
kW
A
A
kW
kW
K/min (CFM)
kW
K/min (CFM)
mmAq, Pa
kW
mm(in.)
mm(in.)
Liquid
Gas
PKH-2FKA3
Single. 60Hz. 220V
Munsell 3.4Y 7.7/0.8(White)
Plate fin coil
Line flow (direct) o1
0.030
10-13<353-459>
0<direct blow>
—
Remote controller & built-in
36-43
20<13/16>
1,250<49-3/16>
200<7-7/8>
300<11-13/16>
18<40>
PUH-2NKA1PUH-2NKA2
Single, 60Hz, 220V
Munsell 5Y 7/1
Capillary tube
Hermetic
NHJ33NBD
1.5
Line start
Inner thermostat
Plate fin coil
Propeller (direct) o1
0.065
45<1,590>
Reverse cycle
49
870<34-1/4>
295+24 <11-5/8 add 1>
650 <25-5/8>
66.5<146>
R22
2.2<4.8>
9.52 <3/8>
15.88 <5/8>
Flared
Flared
Max. 40m
Max. 40m
2.41/2.83
11.07/12.99
54
2.45
11.2
54
Cooling
5,800/5,100
19,800/17,400
2.49/2.91
0.08
0.37
0.50
Heating
6,600
22,500
2.53
0.08
0.37
0.50
W1/ W2 W2
Notes : w1 Rating conditions
(INDOOR) Cooling : D.B. 27:, W.B. 19:
(OUTDOOR) Cooling : D.B. 35:
w2 Rating conditions
(INDOOR) Cooling : D.B. 29:, W.B. 19:Heating : D.B. 21:
(OUTDOOR) Cooling : D.B. 46:Heating : D.B. 7:, W.B. 6:
60Hz
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10
kg(lbs)
PKH-2.5FKA2PKH-2.5FKA3
Service Ref.
Power supply(Phase, cycle, voltage)
External finish
Heat exchanger
Fan
Booster heater
Operation control & Thermostat
Noise level(Low-High)
Cond. drain connection O.D.
Dimensions
Weight
Service Ref.
Power supply(Phase, cycle, voltage)
External finish
Refrigerant control
Compressor
Heat exchanger
Fan
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Pipe size O.D.
Connection method
Between the indoor & outdoor units
Indoor side
Outdoor side
Height difference
Piping length
Input
Running current
Starting current
Fan(drive)oNo.
Fan motor output
Airflow(Low-High)
External static pressure
Input
Running current
Starting current
Model
Motor output
Starter type
Protection devices
Fan(drive)oNo.
Fan motor output
Airflow
Charge
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
W
D
H
Function
Total input
Capacity
dB
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
W
D
H
INDOOR UNITOUTDOOR UNIT
REFRIGERANT
PIPING
Item Service Ref.
W
Btu/h
kW
kW
A
A
kW
A
A
kW
kW
K/min (CFM)
kW
K/min (CFM)
mmAq, Pa
kW
mm(in.)
mm(in.)
Liquid
Gas
PKH-2.5FKA2PKH-2.5FKA3
Single. 60Hz. 220V
Munsell 3.4Y 7.7/0.8(White)
Plate fin coil
Line flow (direct) o2
0.040
15-20<530-706>
0<direct blow>
—
Remote controller & built-in
39-45
20<13/16>
1,400<55-1/8>
235<9-1/4>
340<13-3/8>
26<57>
PUH-2.5NKA1PUH-2.5NKA2
Single, 60Hz, 220V
Munsell 5Y 7/1
Capillary tube
Hermetic
NHJ38NBD
1.7
Line start
Inner thermostat
Plate fin coil
Propeller (direct) o1
0.085
50<1,764>
Reverse cycle
52
870<34-1/4>
295+24 <11-5/8 add 1>
850<33-7/16>
74<163>
R22
2.8<6.2>
9.52 <3/8>
15.88 <5/8>
Flared
Flared
Max. 50m
Max. 50m
2.91/3.43
13.50/15.75
58
2.80
13.0
58
Cooling
7,000/5,900
23,900/20,100
3.01/3.53
0.095
0.44
0.70
Heating
8,000
27,300
2.90
0.095
0.44
0.70
w1/ w2 w2
Notes : w1 Rating conditions
(INDOOR) Cooling : D.B. 27:, W.B. 19:
(OUTDOOR) Cooling : D.B. 35:
w2 Rating conditions
(INDOOR) Cooling : D.B. 29:, W.B. 19:Heating : D.B. 21:
(OUTDOOR) Cooling : D.B. 46:Heating : D.B. 7:, W.B. 6:
60Hz
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