Mitsubishi MUZ-HM18NA2-U1, MUZ-HM18NA-U1, MUZ-HM24NA-U1, MUZ-HM24NA2-U1 Service Manual
HFC
utilized
R410A
INDOOR UNIT
OUTDOOR UNIT
SERVICE MANUAL
Models
Revision C:
U1
• MUZ-HM09/12NA
have been added.
OBH747 REVISED EDITION-B is void.
-
, MUZ-HM09/12NA2
No. OBH747
REVISED EDITION-C
U1
-
MUZ-HM09NA
-
MUZ-HM09NA2
MUZ-HM12NA
-
MUZ-HM12NA2
MUZ-HM15NA
-
MUZ-HM15NA2
MUZ-HM24NA
U1
,
U1,U8
-
U1,U8
U1,U8
-
U1
U1
-
U8
MUZ-HM18NA
MUZ-HM18NA2
MUZ-HM24NA
MUZ-HM24NA2
Indoor unit service manual
MSZ-HM•NA Series (OBH746)
CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS ····················· 4
3. SPECIFICATION ················································ 5
4. OUTLINES AND DIMENSIONS ······················ 10
5. WIRING DIAGRAM ·········································· 12
6. REFRIGERANT SYSTEM DIAGRAM ·············15
7. DATA ································································ 19
8. ACTUA TOR CONTROL ··································· 32
9. SERVICE FUNCTIONS ··································· 33
10. TROUBLESHOOTING ····································· 34
11. DISASSEMBLY INSTRUCTIONS ···················· 59
PARTS CATALOG (OBB747)
U1
-
U1
-
U1
-
U1
-
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
Use the specifi ed refrigerant only
OBH747C
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the spec labels provided with our products.
We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by
failure to follow the instructions.
Revision A:
• MUZ-HM09/12NA-U8, MUZ-HM09/12NA2-U8, MUZ-HM15/18NA-U1, MUZ-HM15/18NA2-U1 and MUZ-HM24NA2-U1 have
been added.
Revision B:
• 3. SPECIFICATION has been modified.
Revision C:
• MUZ-HM09/12NA
U1
-
, MUZ-HM09/12NA2
U1
-
have been added.
2
1
OBH747C
TECHNICAL CHANGES
MUZ-HM24NA
1. New model
MUZ-HM09NA
MUZ-HM09NA2
MUZ-HM12NA
MUZ-HM12NA2
MUZ-HM15NA
MUZ-HM15NA2
MUZ-HM18NA
MUZ-HM18NA2
MUZ-HM24NA2
1. New model
MUZ-HM09NA
MUZ-HM09NA2
MUZ-HM12NA
MUZ-HM12NA2
1. New model
U1
-
U8
-
U8
-
U8
-
U8
-
U1
-
U1
-
U1
-
U1
-
U1
-
U1
-
U1
-
U1
-
U1
-
3
Piping
Air outlet
Drain outlet
Air inlet
(back and side)
Drain hose
2
OBH747C
PART NAMES AND FUNCTIONS
MUZ-HM09NA MUZ-HM09NA2 MUZ-HM12NA MUZ-HM12NA2
MUZ-HM15NA MUZ-HM15NA2 MUZ-HM18NA MUZ-HM18NA2
Air inlet
(back and side)
Piping
Air outlet
Drain hose
Drain outlet
MUZ-HM24NA MUZ-HM24NA2
4
3
OBH747C
SPECIFICATION
Outdoor unit model
Capacity
Rated (Minimum~Maximum)
Capacity
Rated (Maximum)
Power consumption
Rated (Minimum~Maximum)
Power consumption
Rated (Maximum)
1
EER
HSPF IV
[SEER]
4
Cooling 1
Heating 47 1
Heating 17 2
Cooling 1
Heating 47 1
Heating 17 2
3
Cooling 12.0 [ 18.0 ]
Heating 10.0 [NA] / 8.5 [NA2]
COP Heating
Power factor
Cooling (208/230) % 87/87 84/84
Heating (208/230) % 90/90 90/89
1
MUZ-HM09NA
MUZ-HM09NA2
U1
-
U1
Btu/h 9,000 ( 3,800 ~ 10,000 )
Btu/h 10,900 ( 4,500 ~ 11,800 )
Btu/h 6,700 (7,200)
W 750 (240 - 850) 750 (205 - 850)
W 900 (240 - 1,000) 900 (255 - 1,000)
W 700 (780)
3.55
MUZ-HM09NA
MUZ-HM09NA2
Power supply V , phase , Hz 208/230 , 1 , 60
Max. fuse size (time delay) A 15
Min. circuit ampacity A 9 12
Fan motor F.L.A A 0.50
Model KNB073FRVMC KNB073FQDHC
Compressor
R.L.A A 6.2 6.6
L.R.A A 7.7 8.2
Refrigeration oil
fl oz. (L) (Model)
9.1 (0.27) (FV50S) 10.8 (0.32) (NEO22)
Refrigerant control Linear expansion valve
Sound level
1
Airfl ow
High - Med. - Low
Fan speed
High - Med. - Low
Cooling dB(A) 46
Heating
dB(A) 50
Cooling CFM 1,063
Heating
CFM 1,282 - 1,105 1,240 - 1,105
Cooling rpm 740
Heating rpm 890 - 770 860 - 770
Defrost method Reverse cycle
W in. 31-1/2
Dimensions
D in. 11-1/4
H in. 21-5/8
Weight Ib. 73
External fi nish Munsell 3Y 7.8/1.1
Refrigerant piping Not supplied
Refrigerant pipe size
(Min. wall thickness)
Connection method
Between the indoor &
outdoor units
Refrigerant charge (R410A)
Liquid in. 1/4 (0.0315)
Gas in. 3/8 (0.0315)
Indoor Flared
Outdoor Flared
Height difference ft. 40
Piping length ft. 65
1 lb. 12 oz.
NOTE: Test conditions are based on AHRI 210/240.
1: Rating conditions (Cooling) — Indoor: 80˚FDB, 67˚FWB, Outdoor: 95˚FDB, (75˚FWB)
(Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 47˚FDB, 43˚FWB
2: (Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 17˚FDB, 15˚FWB
3: Test condition (Refer to page 9.)
4: Test condition (Refer to page 9.)
U8
-
U8
-
5
Outdoor unit model
OBH747C
Capacity
Rated (Minimum~Maximum)
Capacity
Rated (Maximum)
Power consumption
Rated (Minimum~Maximum)
Power consumption
Rated (Maximum)
1
EER
HSPF IV
[SEER]
4
Cooling 1
Heating 47 1
Heating 17 2
Cooling 1
Heating 47 1
Heating 17 2
3
Cooling 9.9 [ 18.0 ]
Heating 10.0 [NA] / 8.5 [NA2]
COP Heating
Power factor
Cooling (208/230) % 95/95 94/94
Heating (208/230) % 93/93 95/96
MUZ-HM12NA
MUZ-HM12NA2
Btu/h 12,000 ( 3,800 ~ 12,200 )
Btu/h 12,200 ( 4,500 ~ 14,500 ) 12,200 ( 5,500 ~ 14,500 )
Btu/h 7,600 (9,000)
W 1,210 (240 - 1,300) 1,210 (205 - 1,300)
W 990 (240 - 1,220) 990 (340 - 1,660)
W 800 (990)
1
U1
-
U1
-
MUZ-HM12NA
MUZ-HM12NA2
3.61
Power supply V , phase , Hz 208/230 , 1 , 60
Max. fuse size (time delay) A 15
Min. circuit ampacity A 9 12
Fan motor F.L.A A 0.50
Compressor
Model
R.L.A A 6.2 6.6
L.R.A A 7.7 8.2
Refrigeration oil
fl oz. (L) (Model)
KNB073FRVMC KNB092FQAHC
9.1 (0.27) (FV50S) 10.8 (0.32) (NEO22)
Refrigerant control Linear expansion valve
Sound level
1
Airfl ow
High - Med. - Low
Fan speed
High - Med. - Low
Cooling dB(A) 49
Heating
dB(A) 51
Cooling CFM 1,063 1,102 - 639
Heating
CFM 1,282 - 1,105 1,186 - 1,116 - 1,045
Cooling rpm 740 810 - 490
Heating rpm 890 - 770 870 - 820 - 770
Defrost method Reverse cycle
W in. 31-1/2
Dimensions
D in. 11-1/4
H in. 21-5/8
Weight Ib. 73
External fi nish Munsell 3Y 7.8/1.1
Refrigerant piping Not supplied
Refrigerant pipe size
(Min. wall thickness)
Connection method
Between the indoor &
outdoor units
Refrigerant charge (R410A)
Liquid in. 1/4 (0.0315)
Gas in. 3/8 (0.0315)
Indoor Flared
Outdoor Flared
Height difference ft. 40
Piping length ft. 65
1 lb. 12 oz. 2 lb. 9 oz.
NOTE: Test conditions are based on AHRI 210/240.
1: Rating conditions (Cooling) — Indoor: 80˚FDB, 67˚FWB, Outdoor: 95˚FDB, (75˚FWB)
(Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 47˚FDB, 43˚FWB
2: (Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 17˚FDB, 15˚FWB
3: Test condition (Refer to page 9.)
4: Test condition (Refer to page 9.)
U8
-
U8
-
6
Outdoor unit model
OBH747C
Capacity
Rated (Minimum~Maximum)
Capacity
Rated (Maximum)
Power consumption
Rated (Minimum~Maximum)
Power consumption
Rated (Maximum)
1
EER
HSPF IV
[SEER]
4
Cooling 1
Heating 47 1
Heating 17 2
Cooling 1
Heating 47 1
Heating 17 2
3
Cooling 12.0 [18.0] 10.5 [18.0]
Heating 10.0 [NA] / 8.5 [NA2] 10.0 [NA] / 8.5 [NA2]
COP Heating
Power factor
Cooling (208/230) % 98/98 98/98
Heating (208/230) % 98/98 97/97
1
MUZ-HM15NA
MUZ-HM15NA2
Btu/h 14,000 (3,100 - 16,000) 17,200 (5,800 - 18,000)
Btu/h 18,000 (4,800 - 18,500) 18,000 (5,400 - 20,900)
Btu/h 11,500 (14,000) 11,500 (15,000)
W 1,127 (187 - 1,957) 1,598 (308 - 2,028)
W 1,570 (190 - 1,980) 1,548 (288 - 2,208)
W 1,290 (1,820) 1,258 (1,908)
3.30 3.32
MUZ-HM18NA
MUZ-HM18NA2
Power supply V , phase , Hz 208/230, 1 , 60 208/230, 1 , 60
Max. fuse size (time delay) A 15 15
Min. circuit ampacity A 10 10
Fan motor F.L.A A 0.50 0.50
Model SNB130FQBMT SNB130FQBMT
Compressor
R.L.A A 7.4 7.4
L.R.A A 9.3 9.3
Refrigeration oil
fl oz. (L) (Model)
11.8 (0.35) (FV50S) 11.8 (0.35) (FV50S)
Refrigerant control Linear expansion valve
Sound level
1
Airfl ow
High - Med. - Low
Fan speed
High - Med. - Low
Cooling dB(A) 49 49
Heating
dB(A) 51 51
Cooling CFM 1,102 - 639 1,102 - 639
Heating
CFM 1,186 - 1,045 - 1,045 1,186 - 1,045 - 1,045
Cooling rpm 810 - 490 810 - 490
Heating rpm 870 - 770 - 770 870 - 770 - 770
Defrost method Reverse cycle
W in. 31-1/2 31-1/2
Dimensions
D in. 11-1/4 11-1/4
H in. 21-5/8 21-5/8
Weight Ib. 81 81
External fi nish Munsell 3Y 7.8/1.1
Refrigerant piping Not supplied
Refrigerant pipe size
(Min. wall thickness)
Connection method
Between the indoor &
outdoor units
Liquid in. 1/4 (0.0315) 1/4 (0.0315)
Gas in. 1/2 (0.0315) 1/2 (0.0315)
Indoor Flared Flared
Outdoor Flared Flared
Height difference ft. 40 40
Piping length ft. 65 65
Refrigerant charge (R410A) 2 lb. 9 oz. 2 lb. 10 oz.
NOTE: Test conditions are based on AHRI 210/240.
1: Rating conditions (Cooling) — Indoor: 80˚FDB, 67˚FWB, Outdoor: 95˚FDB, (75˚FWB)
(Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 47˚FDB, 43˚FWB
2: (Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 17˚FDB, 15˚FWB
3: Test condition (Refer to page 9.)
4: Test condition (Refer to page 9.)
7
Outdoor unit model
OBH747C
Capacity
Rated (Minimum~Maximum)
Capacity
Rated (Maximum)
Power consumption
Rated (Minimum~Maximum)
Power consumption
Rated (Maximum)
Cooling 1 Btu/h 22,500 (5,800 ~ 22,500)
Heating 47
1 Btu/h 26,000 (5,400 ~ 26,000)
Heating 17 2 Btu/h 18,500 (18,500)
Cooling 1 W 2,575 (275 ~ 2,575)
Heating 47
1 W 2,445 (265 ~ 2,445)
Heating 17 2 W 2,245 (2,245)
MUZ-HM24NA
MUZ-HM24NA2
EER 1 [SEER] 3 Cooling 8.6 [18.0]
HSPF IV
COP Heating
Power factor
4 Heating 9.5 [NA] / 8.5 [NA2]
1 3.05
Cooling (208/230) % 99/99
Heating (208/230) % 99/99
Power supply V , phase , Hz 208/230, 1 , 60
Max. fuse size (time delay) A 15
Min. circuit ampacity A 14
Fan motor F.L.A 0.93
Model SNB130FQBMT
Compressor
Refrigeration oil
R.L.A 10
L.R.A 12.5
fl oz. (L) (Model)
11.8 (0.35) (FV50S)
Refrigerant control Linear expansion valve
Sound level
1
Airfl ow
High - Med. - Low
Fan speed
High - Med. - Low
Cooling dB(A) 54
Heating dB(A) 55
COOL CFM 1,742 - 922
HEAT CFM 1,691 - 1,691 - 1,372
Cooling rpm 840 - 450
Heating rpm 810 - 810 - 650
Defrost method Reverse cycle
W in. 33-1/16
Dimensions
D in. 13
H in. 34-5/8
Weight Ib. 121
External fi nish Munsell 3Y 7.8/1.1
Refrigerant piping Not supplied
Refrigerant pipe size
(Min. wall thickness)
Connection method
Between the indoor &
outdoor units
Liquid in. 3/8 (0.0315)
Gas in. 5/8 (0.0315)
Indoor Flared
Outdoor Flared
Height difference ft. 50
Piping length ft. 100
Refrigerant charge (R410A) 3 lb. 9 oz.
NOTE: Test conditions are based on AHRI 210/240.
1: Rating conditions (Cooling) — Indoor: 80˚FDB, 67˚FWB, Outdoor: 95˚FDB, (75˚FWB)
(Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 47˚FDB, 43˚FWB
2: (Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 17˚FDB, 15˚FWB
8
Test condition
OBH747C
3, 4
Mode Test
ARI
"A-2" Cooling Steady State
at rated compressor Speed
"B-2" Cooling Steady State
at rated compressor Speed
SEER
(Cooling)
HSPF
(Heating)
5
: At Intermediate compressor Speed
"B-1" Cooling Steady State
at minimum compressor Speed
"F-1" Cooling Steady State
at minimum compressor Speed
"E-V" Cooling Steady State
at Intermediate compressor Speed
"H1-2" Heating Steady State
at rated compressor Speed
"H3-2" Heating
at rated compressor Speed
"H0-1" Heating Steady State
at minimum compressor Speed
"H1-1" Heating Steady State
at minimum compressor Speed
"H2-V" Heating
at Intermediate compressor Speed
5
5
= ("Rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
Indoor air condition (°F) Outdoor air condition (°F)
Dry bulb Wet bulb Dry bulb Wet bulb
80 67 95 (75)
80 67 82 (65)
80 67 82 (65)
80 67 67 (53.5)
80 67 87 (69)
70 60 47 43
70 60 17 15
70 60 62 56.5
70 60 47 43
70 60 35 33
OPERATING RANGE
(1) POWER SUPPLY
Outdoor unit
(2) OPERATION
Mode Condition
Standard temperature 80 67 95 —
Cooling
Heating
Maximum temperature 90 73 115 —
Minimum temperature 67 57 14 —
Maximum humidity 78 % —
Standard temperature 70 60 47 43
Maximum temperature 80 67 75 65
Minimum temperature 70 60 -4 (NA), 5(NA2) -5 (NA), 4 (NA2)
Rated voltage Guaranteed voltage (V)
208/230 V
1 phase
60 Hz
Min. 187
DB WB DB WB
208 230 Max. 253
Intake air temperature (°F)
Indoor Outdoor
9
4
OBH747C
OUTLINES AND DIMENSIONS
MUZ-HM09NA MUZ-HM09NA2 MUZ-HM12NA MUZ-HM12NA2
MUZ-HM15NA MUZ-HM15NA2 MUZ-HM18NA MUZ-HM18NA2
REQUIRED SPACE
*1
4 in. (100 mm) or more when
front and sides of the unit are clear
4 in. (100 mm)
or more
8 in. (200 mm)
or more *2
*2
When any 2 sides of left, right
and rear of the unit are clear
holes
Liquid refrigerant pipe joint
Refrigerant pipe (flared)
Gas refrigerant pipe joint
Refrigerant pipe (flared)
Ø 1/2 (HM15/18)
clear *1
4 in. (100 mm)
14 in. (350 mm)
or more
Ø 1/4
Ø 3/8 (HM09/12)
Unit: inch
or more
10
MUZ-HM24NA MUZ-HM24NA2
OBH747C
Unit: inch
REQUIRED SPACE
Air in
13
34-5/8
2
17-25/32
6-7/8
16-7/16
Air in
4-5/16
Air out
19-11/16
33-1/16
*1 20 in. (500 mm) or more when front
and sides of the unit are clear
Drain hole
1-9/16
1-5/8
14-3/16
2-holes 13/32 13/16
3-3/16
4 in. (100 mm)
or more
Clear *1
20 in. (500 mm)
or more *2
*2 When any 2 sides of left, right
and rear of the unit are clear
Service panel
Liquid refrigerant pipe joint
Refrigerant pipe (flared)
35
44
4 in. (100 mm)
or more
14 in. (350 mm)
or more
Ø 3/8
6-1/2
3-29/32
7-11/16
Gas refrigerant pipe joint
Refrigerant pipe (flared)
Ø 5/8
11
5
OBH747C
WIRING DIAGRAM
MUZ-HM09NA
U1
-
MUZ-HM09NA2
U1
-
MUZ-HM12NA
U1
-
MUZ-HM12NA2
U1
-
MUZ-HM09NA
U8
-
MUZ-HM09NA2
U8
-
MUZ-HM12NA
U8
-
MUZ-HM12NA2
U8
-
12
MUZ-HM15NA
OBH747C
U1
-
MUZ-HM15NA2
U1
-
MUZ-HM18NA
U1
-
MUZ-HM18NA2
U1
-
13
MUZ-HM24NA
OBH747C
U1
-
MUZ-HM24NA2
U1
-
14
6
OBH747C
REFRIGERANT SYSTEM DIAGRAM
MUZ-HM09NA
Refrigerant pipe ø3/8 (ø9.52)
(with heat insulator)
Flared connection
Flared connection
Refrigerant pipe ø1/4 (ø6.35)
(with heat insulator)
U1
-
MUZ-HM09NA2
Stop valve
(with service port)
Stop valve
(with strainer)
U1
-
MUZ-HM12NA
4-way valve
Muffler
Discharge
temperature
thermistor
RT62
Service port
Capillary tube
O.D. 0.118 × I.D. 0.055
× 10-1/4
(ø3.0 × ø1.4
×
260)
LEV
-
Muffler
Service port
Compressor
Defrost
thermistor
RT61
U1
MUZ-HM12NA2
Outdoor heat
exchanger
temperature
Outdoor
heat
exchanger
Refrigerant flow in cooling
Refrigerant flow in heating
thermistor
RT68
Ambient
temperature
thermistor
RT65
Strainer
#100
R.V. coil
heating ON
cooling OFF
U1
-
Unit: Inch (mm)
MUZ-HM09NA
Refrigerant pipe ø3/8 (ø9.52)
(with heat insulator)
Flared connection
Flared connection
Refrigerant pipe ø1/4 (ø6.35)
(with heat insulator)
U8
-
MUZ-HM09NA2
Stop valve
(with service port)
Stop valve
(with strainer)
U8
-
4-way valve
Muffler
Discharge
temperature
thermistor
RT62
Service port
Capillary tube
O.D. 0.118 × I.D. 0.079
× 9-7/16
(ø3.0 × ø2.0
×
240)
LEV
Muffler
Service port
Compressor
Defrost
thermistor
RT61
Outdoor heat
exchanger
temperature
Outdoor
heat
exchanger
Refrigerant flow in cooling
Refrigerant flow in heating
thermistor
RT68
Ambient
temperature
thermistor
RT65
Strainer
#100
R.V. coil
heating ON
cooling OFF
15
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainer)
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe ø1/4 (ø6.35)
(with heat insulator)
R.V. coil
heating ON
cooling OFF
Strainer
#100
LEV
Ambient
temperature
thermistor
RT65
Muffler
Capillary tube
O.D. 0.157 ×
I.D. 0.094 × 9-7/16
(
ø4.0 × ø2.4 × 240
)
Outdoor heat
exchanger
temperature
thermistor
RT68
Capillary tube
O.D. 0.118 ×
I.D. 0.079 × 8-9/32
(ø3.0 × ø2.0 × 210)
Service
port
Service
port
Refrigerant pipe ø1/2 (ø12.7)
(with heat insulator)
Stop valve
(with service port)
Muffler
MUZ-HM12NA
OBH747C
U8
-
MUZ-HM12NA2
U8
-
Unit: Inch (mm)
Refrigerant pipe ø3/8 (ø9.52)
(with heat insulator)
Stop valve
(with service port)
Flared connection
Flared connection
Stop valve
(with strainer)
Refrigerant pipe ø1/4 (ø6.35)
(with heat insulator)
4-way valve
Muffler
Discharge
temperature
thermistor
RT62
Service port
Capillary tube
O.D. 0.118 × I.D. 0.079
× 9-7/16
×
(ø3.0 × ø2.0
240)
Muffler
Service port
Compressor
Defrost
thermistor
RT61
Capillary tube
O.D. 0.118 × I.D. 0.071
× 23-5/8
3.0
× ø
(ø
1.8
LEV
Outdoor
heat
exchanger
×
600
)
(×2)
Strainer
#100
R.V. coil
heating ON
cooling OFF
Refrigerant flow in cooling
Refrigerant flow in heating
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
MUZ-HM15NA MUZ-HM15NA2 MUZ-HM18NA MUZ-HM18NA2
16
MUZ-HM24NA MUZ-HM24NA2
OBH747C
Unit: Inch (mm)
Refrigerant pipe
(with heat insulator)
Flared connection
Flared connection
Refrigerant pipe
(with heat insulator)
ø5/8 (ø
ø3/8 (ø
15.88)
Stop valve
(with service port)
Strainer
#100
Stop valve
9.52)
4-way
valve
Service
port
Muffler
Discharge
temperature
thermistor
RT62
Compressor
Capillary tube
O.D. 0.118×
I.D. 0.079× 7-7/8
(ø3.0×ø2.0×200(×4))
Capillary tube
O.D. 0.157×
I.D. 0.094×
3-15/16
(ø
4.0×ø
2.4×100)
Muffler
with #100 mesh strainer
Service port
LEV
Capillary tube
Strainer
O.D. 0.157×
I.D. 0.094×7-7/8
(ø
4.0×ø
2.4×200)
#100
Outdoor
Defrost
thermistor
RT61
Refrigerant flow in cooling
Refrigerant flow in heating
heat
exchanger
Outdoor heat
exchanger
temperature
thermistor
RT68
R.V. coil
heating ON
cooling OFF
17
MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
OBH747C
Refrigerant piping: ft. Piping size O.D: in.
Model
MUZ-HM09NA
MUZ-HM09NA2
MUZ-HM12NA
MUZ-HM12NA2
MUZ-HM15NA
MUZ-HM15NA2
MUZ-HM18NA
MUZ-HM18NA2
MUZ-HM24NA
MUZ-HM24NA2
Max. Length
A
Max. Height difference
B
Gas Liquid
3/8
65 40
1/2
100 50 5/8 3/8
Indoor
unit
Max. Height
difference
B
Max. Length
A
Outdoor unit
1/4
ADDITIONAL REFRIGERANT CHARGE (R410A: oz.)
NOTE: Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.
Model
MUZ-HM09NA
MUZ-HM09NA2
MUZ-HM12NA
MUZ-HM12NA2
MUZ-HM12NA
MUZ-HM12NA2
MUZ-HM15NA
MUZ-HM15NA2
MUZ-HM18NA
MUZ-HM18NA2
Model
MUZ-HM24NA
MUZ-HM24NA2
U1
-
U1
-
U8
-
U8
-
Outdoor unit
precharged
25 30 40 50 60 65
1 lb. 12 oz.
0 1.08 3.24 5.40 7.56 8.64
2 lb. 9 oz.
2 lb. 10 oz.
Outdoor unit
precharged
25 30 40 50 60 70 80 90 100
3 lb. 9 oz. 0 1.08 3.24 5.40 7.56 9.72 11.88 14.04 16.20
Refrigerant piping length (one way): ft.
Calculation: X oz. = 1.08/5 oz./ft. × (Refrigerant piping length (ft.) - 25)
Refrigerant piping length (one way): ft.
Calculation: X oz. = 1.08/5 oz./ft. × (Refrigerant piping length (ft.) - 25)
18
DATA7
OBH747C
MUZ-HM09NA MUZ-HM09NA2 MUZ-HM12NA MUZ-HM12NA2
MUZ-HM15NA MUZ-HM15NA2 MUZ-HM18NA MUZ-HM18NA2
MUZ-HM24NA MUZ-HM24NA2
7-1. PERFORMANCE DATA
1) COOLING CAPACITY
Indoor air Outdoor intake air DB temperature (˚F)
Model
MUZ-HM09NA
MUZ-HM09NA2
MUZ-HM12NA
MUZ-HM12NA2
MUZ-HM15NA
MUZ-HM15NA2
MUZ-HM18NA
MUZ-HM18NA2
MUZ-HM24NA
MUZ-HM24NA2
NOTE: 1. IWB : Intake air wet-bulb temperature TC : Total Capacity (x10
2. SHC is based on 80˚F of indoor Intake air DB temperature.
IWB (˚F)
71 11.0 7.6 0.67 10.3 7.1 0.73 9.7 6.6 0.79 9.0 6.2 0.83 8.3 5.7 0.86
67 10.4 8.6 0.63 9.7 8.0 0.69 9.0 7.4 0.75 8.4 6.9 0.80 7.7 6.3 0.83
63 9.8 9.4 0.60 9.1 8.7 0.66 8.5 8.1 0.72 7.7 7.3 0.77 7.0 6.7 0.80
71 14.7 9.4 1.08 13.7 8.7 1.18 12.9 8.2 1.27 12.0 7.6 1.34 11.0 7.0 1.39
67 13.9 10.7 1.02 13.0 10.0 1.12 12.0 9.2 1.21 11.2 8.6 1.28 10.3 7.9 1.34
63 13.1 11.8 0.97 12.1 10.9 1.07 11.3 10.2 1.16 10.3 9.3 1.23 9.4 8.5 1.28
71 17.2 11.1 1.04 16.0 10.4 1.14 15.1 9.7 1.23 14.0 9.1 1.29 12.9 8.3 1.35
67 16.2 12.7 0.98 15.1 11.8 1.08 14.0 10.9 1.17 13.0 10.2 1.24 12.0 9.3 1.30
63 15.3 13.9 0.94 14.1 12.9 1.04 13.2 12.0 1.12 12.0 10.9 1.19 10.9 10.0 1.24
71 21.1 15.3 1.46 19.7 14.3 1.60 18.5 13.4 1.72 17.2 12.5 1.81 15.8 11.5 1.89
67 20.0 17.2 1.38 18.6 16.0 1.52 17.2 14.8 1.64 16.0 13.8 1.74 14.7 12.6 1.82
63 18.7 18.6 1.31 17.4 17.3 1.45 16.2 16.1 1.57 14.7 14.6 1.67 13.4 13.3 1.74
71 27.6 20.9 2.34 25.8 19.5 2.56 24.2 18.3 2.76 22.5 17.0 2.91 20.7 15.7 3.02
67 26.1 23.2 2.21 24.3 21.6 2.43 22.5 20.0 2.63 20.9 18.6 2.79 19.2 17.1 2.92
63 24.5 25.1 2.10 22.7 23.3 2.33 21.2 21.6 2.51 19.2 19.7 2.68 17.6 18.0 2.79
SHC : Sensible Heat Capacity (x10
75 85 95 105 115
TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC
3
3
Btu/h) TPC : Total Power Consumption (kW)
Btu/h)
2) COOLING CAPACITY CORRECTIONS
Refrigerant piping length (one way: ft.)
Model 25 (std.) 40 65 100
MUZ-HM09NA
MUZ-HM09NA2
MUZ-HM12NA
MUZ-HM12NA2
MUZ-HM15NA
MUZ-HM15NA2
MUZ-HM18NA
MUZ-HM18NA2
MUZ-HM24NA
MUZ-HM24NA2
1.0 0.954 0.878 —
1.0 0.954 0.878 0.771
19
3) HEATING CAPACITY
OBH747C
Indoor air Outdoor intake air WB temperature (˚F)
Model
MUZ-HM09NA
MUZ-HM09NA2
MUZ-HM12NA
MUZ-HM12NA2
MUZ-HM15NA
MUZ-HM15NA2
MUZ-HM18NA
MUZ-HM18NA2
MUZ-HM24NA
MUZ-HM24NA2
NOTE: 1. IDB : Intake air dry-bulb temperature
2. Above data is for heating operation without any frost.
How to operate with fixed operational frequency of the compressor.
1. Press the EMERGENCY OPERATION switch on the front of the indoor unit, and select either EMERGENCY COOL
mode or EMERGENCY HEAT mode before starting to operate the air conditioner.
2. The compressor starts with operational frequency.
3. The fan speed of the indoor unit is High.
4. This operation continues for 30 minutes.
5. In order to release this operation, press the EMERGENCY OPERATION switch or press any button on the remote controller.
IDB (˚F)
75 4.8 0.53 6.3 0.67 7.9 0.79 9.4 0.88 10.6 0.92 11.0 0.94 12.4 0.97
70 5.2 0.51 6.7 0.65 8.2 0.77 9.6 0.86 10.9 0.90 11.2 0.92 12.7 0.95
65 5.5 0.49 6.9 0.62 8.6 0.74 10.0 0.83 11.2 0.88 11.6 0.89 13.0 0.94
75 5.4 0.58 7.1 0.74 8.8 0.87 10.6 0.97 11.9 1.01 12.3 1.03 13.9 1.07
70 5.8 0.56 7.5 0.71 9.2 0.85 10.8 0.94 12.2 0.99 12.6 1.01 14.2 1.05
65 6.1 0.53 7.7 0.68 9.6 0.82 11.2 0.92 12.6 0.97 12.9 0.98 14.5 1.03
75 7.9 0.94 10.4 1.19 13.1 1.40 15.6 1.56 17.6 1.64 18.1 1.66 20.5 1.73
70 8.6 0.90 11.1 1.15 13.5 1.37 15.9 1.52 18.0 1.60 18.5 1.63 21.0 1.70
65 9.0 0.86 11.3 1.10 14.1 1.32 16.5 1.48 18.5 1.56 19.1 1.58 21.4 1.66
75 7.9 0.94 10.4 1.18 13.1 1.39 15.6 1.55 17.6 1.63 18.1 1.65 20.5 1.72
70 8.6 0.90 11.1 1.14 13.5 1.36 15.9 1.51 18.0 1.59 18.5 1.62 21.0 1.69
65 9.0 0.86 11.3 1.10 14.1 1.31 16.5 1.47 18.5 1.55 19.1 1.57 21.4 1.65
75 11.4 1.48 15.1 1.86 18.9 2.19 22.5 2.44 25.4 2.56 26.1 2.60 29.6 2.70
70 12.4 1.41 16.0 1.80 19.5 2.14 23.0 2.38 26.0 2.50 26.8 2.55 30.3 2.65
65 13.0 1.35 16.4 1.73 20.4 2.06 23.8 2.31 26.8 2.44 27.6 2.48 30.9 2.60
TC : Total Capacity (x10
5 152535434555
TC TPC TC TPC TC TPC TC TPC TC TPC TC TPC TC TPC
3
Btu/h) TPC : Total Power Consumption (kW)
20
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