Mitsubishi Electric MUZ-HE09NA User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS····················· 3
3. SPECIFICATION················································ 4
4. OUTLINES AND DIMENSIONS ························ 7
5. WIRING DIAGRAM·········································· 10
6. REFRIGERANT SYSTEM DIAGRAM ············· 13
7. DATA································································ 16
8. ACTUATOR CONTROL··································· 30
9. SERVICE FUNCTIONS ··································· 31
10. TROUBLESHOOTING····································· 31
11. DISASSEMBLY INSTRUCTIONS···················· 52
Models
SPLIT-TYPE AIR CONDITIONERS
OUTDOOR UNIT
Indoor unit service manual
MSZ-HE•NA Series (OBH685)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
HFC
utilized
R410A
No. OBH686
PARTS CATALOG (OBB686)
MUZ-HE09NA
MUZ-HE12NA
MUZ-HE15NA
MUZ-HE09NA
MUZ-HE12NA
MUZ-HE15NA
MUZ-HE18NA
MUZ-HE24NA

2
Use the specified refrigerant only
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.
MUZ-HE09NA
MUZ-HE12NA
MUZ-HE15NA
MUZ-HE18NA
MUZ-HE24NA
1. New model
1TECHNICAL CHANGES
OBH686

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MUZ-HE09NA MUZ-HE12NA MUZ-HE15NA
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
(back and side)
MUZ-HE18NA
Air inlet
(back and side)
Piping
Air outlet
Drain hose
Drain outlet
2PART NAMES AND FUNCTIONS
MUZ-HE24NA
Piping
Air outlet
Drain outlet
Air inlet
(back and side)
Drain hose
OBH686

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Outdoor unit model MUZ-HE09NA MUZ-HE12NA MUZ-HE15NA MUZ-HE18NA
Capacity
Rated (Minimum~Maximum)
Cooling 1 Btu/h 9,000
( 3,800 ~ 10,000 )
12,000
( 3,800 ~ 12,200 )
14,000
( 3,100 ~ 16,000 )
17,200
( 3,700 ~ 18,000 )
Heating 47 1 Btu/h 10,900
( 4,500 ~ 11,800 )
12,200
( 5,500 ~ 14,500 )
18,000
( 4,800 ~ 18,500 )
18,000
( 3,500 ~ 20,900 )
Power consumption
Rated
Cooling 1W 750 1,210 1,170 1,640
Heating 47 1W 900 990 1,600 1,590
EER 1[SEER] 2 Cooling 12.0 [ 18.0 ] 9.9 [ 18.0 ] 12.0 [ 18.0 ] 10.5 [ 18.0 ]
HSPF IV 3 Heating 8.5
COP Heating 1 3.55 3.61 3.30 3.32
Power supply V , phase , Hz 208/230 , 1 , 60
Max. fuse size (time delay) A 15
Min. circuit ampacity A 12 14
Fan motor F.L.A 0.50 0.93
Compressor
Model KNB073FQDHC KNB092FQAHC SNB130FQBHT
R.L.A 6.6 7.4 10.0
L.R.A 8.2 9.3 12.5
Refrigeration oil
(Model) L 0.32 (NEO22) 0.45 (NEO22)
Refrigerant control Linear expansion valve
Sound level 1Cooling dB(A) 46 49 54
Heating dB(A) 50 51 56
Defrost method Reverse cycle
Dimensions
W in. 31-1/2 33-1/16
D in. 11-1/4 13
H in. 21-5/8 33-7/16
Weight Ib. 66 77 80 119
External finish Munsell 3Y 7.8/1.1
Remote controller Wireless type
Control voltage
(by built-in transformer) VDC 12 - 24
Refrigerant piping Not supplied
Refrigerant pipe size
(Min. wall thickness)
Liquid in. 1/4 (0.0315)
Gas in. 3/8 (0.0315) 1/2 (0.0315)
Connection method Indoor Flared
Outdoor Flared
Between the indoor &
outdoor units
Height difference ft. 40 50
Piping length ft. 65 100
Refrigerant charge (R410A) 1 lb. 12 oz. 2 lb. 9 oz. 3 lb. 7 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
3SPECIFICATION
OBH686

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Outdoor unit model MUZ-HE24NA
Capacity
Rated (Minimum~Maximum)
Cooling 1 Btu/h 22,500
(8,200 ~ 22,500)
Heating 47 1 Btu/h 26,600
(7,500 ~ 30,000)
Power consumption
Rated
Cooling 1 W 2,620
Heating 47 1 W 2,150
EER 1[SEER] 2 Cooling 8.6 [18.0]
HSPF IV 3 Heating 8.5
COP Heating 1 3.62
Power supply V , phase , Hz 208/230 , 1 , 60
Max. fuse size (time delay) A 20
Min. circuit ampacity A 17.1
Fan motor F.L.A 0.93
Compressor
Model SNB172FQKMT
R.L.A 12.9
L.R.A 16.1
Refrigeration oil
(Model) L 0.40 (FV50S)
Refrigerant control Linear expansion valve
Sound level 1Cooling dB(A) 55
Heating dB(A) 55
Defrost method Reverse cycle
Dimensions
W in. 33-1/16
D in. 13
H in. 34-5/8
Weight Ib. 119
External finish Munsell 3Y 7.8/1.1
Remote controller Wireless type
Control voltage
(by built-in transformer) VDC 12-24
Refrigerant piping Not supplied
Refrigerant pipe size
(Min. wall thickness)
Liquid in. 3/8 (0.0315)
Gas in. 5/8 (0.0315)
Connection method Indoor Flared
Outdoor Flared
Between the indoor &
outdoor units
Height difference ft. 50
Piping length ft. 100
Refrigerant charge (R410A) 4 lb. 3 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
OBH686

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Test condition
ARI Mode Test Indoor air condition (°F) Outdoor air condition (°F)
Dry bulb Wet bulb Dry bulb Wet bulb
SEER
(Cooling)
"A-2" Cooling Steady State
at rated compressor Speed 80 67 95 (75)
"B-2" Cooling Steady State
at rated compressor Speed 80 67 82 (65)
"B-1" Cooling Steady State
at minimum compressor Speed 80 67 82 (65)
"F-1" Cooling Steady State
at minimum compressor Speed 80 67 67 (53.5)
"E-V" Cooling Steady State
at Intermediate compressor Speed 4 80 67 87 (69)
HSPF
(Heating)
"H1-2" Heating Steady State
at rated compressor Speed 70 60 47 43
"H3-2" Heating
at rated compressor Speed 70 60 17 15
"H0-1" Heating Steady State
at minimum compressor Speed 70 60 62 56.5
"H1-1" Heating Steady State
at minimum compressor Speed 70 60 47 43
"H2-V" Heating
at Intermediate compressor Speed 4 70 60 35 33
4: At Intermediate compressor Speed
= ("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
2, 3
(2) OPERATION
Mode Condition
Intake air temperature (°F)
Indoor Outdoor
DB WB DB WB
Cooling
Standard temperature 80 67 95 —
Maximum temperature 90 73 115 —
Minimum temperature 67 57 14 —
Maximum humidity 78 % —
Heating
Standard temperature 70 60 47 43
Maximum temperature 80 67 75 65
Minimum temperature 70 60 -4 -5
3-1. OPERATING RANGE
(1) POWER SUPPLY
Rated voltage Guaranteed voltage (V)
Outdoor unit
208/230 V
1 phase
60 Hz
Min. 187 208 230 Max. 253
OBH686

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Unit: inch
MUZ-HE09NA MUZ-HE12NA MUZ-HE15NA
Liquid pipe :1/4 (flared)
Gas pipe :3/8 (flared) (HE09/12)
1/2 (flared) (HE15)
6-23/32
2
5-7/8
2-23/32
1-3/4
15-3/4
12 ~ 12-3/4
13-9/16
11/16
1-9/16
7/8
21-5/8
11-1/32
13/32
31-1/2
19-11/16
5-15/16
11-29/32
17/3229/32 11-1/4
Air in
handle
Air in
Air out
2- 3/8 13/16 Oval hole
Drain hole
ø 1-5/8
REQUIRED SPACE
14 in. or more
8 in. or more *2
4 in. or more
4 in. or more
*1 4 in. or more when front
and sides of the unit are clear
*2 When any 2 sides of left, right
and rear of the unit are clear
Clear *1
4OUTLINES AND DIMENSIONS
OBH686

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MUZ-HE18NA
20-9/32
14-3/16
Air in
11-25/32
2-19/32
Air in
Air out
19-11/16
33-1/16
13
2
4-25/32
33-7/16
16-15/16
3-3/16
4-3/8
× 13/16 slot
1-11/32
1-9/16
Drain 3 holes
ø1
-5/16
30°
35°
2-9/16
Liquid:1/4(flared)
Gas :1/2(flared)
3-9/16
8-11/32
4 in. or more
REQUIRED SPACE
14 in. or more
4 in. or more
*1 20 in. more when front
and sides of the unit are clear
*2 When any 2 sides of left, right
and rear of the unit are clear
Clear *1
20 in. or more *2
Unit: inch
OBH686

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16-7/16
1-9/16
1-5/8
Drain hole
6-7/8 19-11/16
13
2
Air in
Air out
2-holes 13/32 13/16
14-3/16
33-1/16
4-5/16
3-3/16
34-5/8
17-25/32
Service panel
3-29/32
6-1/2
7-11/16
35
44
Liquid refrigerant pipe joint
Refrigerant pipe (flared) Ø3/8
Gas refrigerant pipe joint
Refrigerant pipe (flared) Ø5/8
14 in. or more
4 in. or more
REQUIRED SPACE
4 in. or more
20 in. or more *2
*1 20 in. or more when front
and sides of the unit are clear
*2 When any 2 sides of left, right
and rear of the unit are clear
Clear *1
Unit: inch
MUZ-HE24NA
OBH686

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MUZ-HE09NA MUZ-HE12NA
5WIRING DIAGRAM
MUZ-HE15NA
OBH686

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MUZ-HE18NA
OBH686

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MUZ-HE24NA
OBH686

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Unit: inch
MUZ-HE09NA
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainar)
Stop valve
(with service port)
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe ø3/8
(with heat insulator)
Refrigerant pipe ø1/4
(with heat insulator)
R.V. coil
heating ON
cooling OFF
Strainer
#100
LEV
Ambient
temperature
thermistor
RT65
Muffler
Capillary tube
O.D. 0.118 ×I.D. 0.079
×9-7/16
(ø3.0 × ø2.0 ×240)
Outdoor heat
exchanger
temperature
thermistor
RT68
Service port
Service port
Muffler
MUZ-HE12NA MUZ-HE15NA
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainar)
Stop valve
(with service port)
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe ø3/8 (HE12NA)
Refrigerant pipe ø1/2 (HE15NA)
(with heat insulator)
Refrigerant pipe ø1/4
(with heat insulator)
R.V. coil
heating ON
cooling OFF
Strainer
#100
Capillary tube
O.D. 0.118 × I.D. 0.071
× 23-5/8
(ø
3.0 × ø 1.8 × 600 ) (×2)
LEV
Ambient
temperature
thermistor
RT65
Muffler
Capillary tube
O.D. 0.118 ×I.D. 0.079
×9-7/16
(ø3.0 × ø2.0 ×240)
Outdoor heat
exchanger
temperature
thermistor
RT68
Muffler
Service port
Service port
6REFRIGERANT SYSTEM DIAGRAM
OBH686

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MUZ-HE18NA
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainar)
Stop valve
(with service port)
Capillary tube
O.D. 0.142 × I.D. 0.094
× 1-31/32
(ø 3.6 × ø 2.4 × 50)
Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe
ø 1/2
(with heat insulator)
Refrigerant pipe ø 1/4
(with heat insulator)
LEV
R.V. coil
heating ON
cooling OFF
Muffler
#100
Receiver
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
Strainer
#100
Service port
Service port
Unit: inch
MUZ-HE24NA
Service
port
Service
port
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
Stop valve
(with service port)
Capillary tube
O.D.0.157 × I.D.0.094
× 3-15/16
(ø 4.0 × ø 2.4 × 100) Refrigerant flow in cooling
Compressor
4-way valve
Refrigerant flow in heating
Refrigerant pipe
ø 5/8
(with heat insulator)
Refrigerant pipe ø 3/8
(with heat insulator)
LEV
R.V. coil
heating ON
cooling OFF
Muffler
#100
Strainer
#100
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
Strainer
#100
OBH686

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Max. Length
A
Max. Height
difference
B
Indoor
unit
Outdoor unit
MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
Model
Refrigerant piping: ft. Piping size O.D: in.
Max. Length
A
Max. Height difference
BGas Liquid
MUZ-HE09/12/15NA 65 40 3/8 (HE09/12)
1/2 (HE15) 1/4
MUZ-HE18NA 100 50 1/2
MUZ-HE24NA 100 50 5/8 3/8
ADDITIONAL REFRIGERANT CHARGE (R410A: oz.)
NOTE: Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.
Model Outdoor unit
precharged
Refrigerant piping length (one way): ft.
25 30 40 50 60 65
MUZ-HE09NA 1 lb. 12 oz.
0 1.62 4.86 8.10 11.34 12.96MUZ-HE12NA 2 lb. 9 oz.
MUZ-HE15NA
Calculation: X oz. = 1.62/5 oz. / ft. × (Refrigerant piping length (ft.) - 25)
Model Outdoor unit
precharged
Refrigerant piping length (one way): ft.
25 30 40 50 60 70 80 90 100
MUZ-HE18NA 3 lb. 7 oz. 0 1.08 3.24 5.40 7.56 9.72 11.88 14.04 16.20
Calculation: X oz. = 1.08/5 oz. / ft. × (Refrigerant piping length (ft.) - 25)
NOTE: Refrigerant piping exceeding 33 ft. requires additional refrigerant charge according to the calculation.
Model Outdoor unit
precharged
Refrigerant piping length (one way): ft.
33 40 50 60 70 80 90 100
MUZ-HE24NA 4 lb. 3 oz. 0 4.14 10.06 15.98 21.90 27.82 33.74 39.66
Calculation: X oz. = 2.96/5 oz. / ft. × (Refrigerant piping length (ft.) - 33)
OBH686

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Model
Indoor air Outdoor intake air DB temperature (˚F)
IWB (˚F) 75 85 95 105 115
TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC
MUZ-HE09NA
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
MUZ-HE12NA
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
MUZ-HE15NA
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
MUZ-HE18NA
71 21.1 12.2 1.46 19.7 11.4 1.60 18.5 10.7 1.72 17.2 9.9 1.81 15.8 9.1 1.89
67 20.0 14.2 1.38 18.6 13.2 1.52 17.2 12.2 1.64 16.0 11.4 1.74 14.7 10.4 1.82
63 18.7 15.8 1.31 17.4 14.7 1.45 16.2 13.6 1.57 14.7 12.4 1.67 13.4 11.3 1.74
MUZ-HE24NA
71 27.6 17.0 2.33 25.8 15.9 2.55 24.2 14.9 2.75 22.5 13.9 2.90 20.7 12.8 3.01
67 26.1 19.6 2.20 24.3 18.2 2.42 22.5 16.9 2.62 20.9 15.7 2.78 19.2 14.4 2.91
63 24.5 21.7 2.10 22.7 20.1 2.32 21.1 18.7 2.50 19.2 17.0 2.67 17.6 15.5 2.78
NOTE: 1. IWB: Intake air wet-bulb temperature
TC: Total Capacity (×103Btu/h)
SHC: Sensible Heat Capacity (×103Btu/h)
TPC: Total Power Consumption (kW)
2. SHC is based on 80˚F of indoor Intake air DB temperature.
7-1. PERFORMANCE DATA
1) COOLING CAPACITY
7DATA
MUZ-HE09NA MUZ-HE12NA MUZ-HE15NA MUZ-HE18NA MUZ-HE24NA
2) COOLING CAPACITY CORRECTIONS
Model Refrigerant piping length (one way: ft.)
25 (std.) 40 65 100
MUZ-HE09NA
MUZ-HE12NA
MUZ-HE15NA
MUZ-HE18NA
1.0 0.954 0.878 —
MUZ-HE24NA 1.0 0.954 0.878 0.771
OBH686

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3) HEATING CAPACITY
Model
Indoor air Outdoor intake air WB temperature (˚F)
IDB (˚F) 5 152535434555
TC TPC TC TPC TC TPC TC TPC TC TPC TC TPC TC TPC
MUZ-HE09NA
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
MUZ-HE12NA
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
MUZ-HE15NA
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
MUZ-HE18NA
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
MUZ-HE24NA
75 11.7 1.27 15.4 1.60 19.3 1.88 23.0 2.10 25.9 2.20 26.7 2.24 30.3 2.32
70 12.6 1.21 16.4 1.55 20.0 1.84 23.5 2.04 26.6 2.15 27.4 2.19 31.0 2.28
65 13.3 1.16 16.8 1.48 20.9 1.77 24.3 1.99 27.4 2.10 28.2 2.13 31.7 2.24
NOTE: 1. IDB: Intake air dry-bulb temperature
TC: Total Capacity (x103Btu/h)
TPC: Total Power Consumption (kW)
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 twice or once, or press any button on
the remote controller.
OBH686

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7-2. PERFORMANCE CURVE
Cooling
71
67
63
65 75 85 95 105 115
0.4
0.5
0.6
0.7
0.8
0.9
1.0
Indoor intake air WB temperature (°F)
SHF at rating condition = 0.82
= 367 CFM
Airflow
Outdoor intake air DB temperature (°F)
Total power consumption
(kW)
71
67
63
65 75 85 95 105 115
0.9
1.0
1.1
1.2
1.3
1.4
1.5
Indoor intake air WB temperature (°F)
SHF at rating condition = 0.74
= 367 CFM
Airflow
Outdoor intake air DB temperature (°F)
Total power consumption
(kW)
MUZ-HE09NA MUZ-HE12NA
Cooling capacity ( at Rated frequency)
0.9
1.0
1.1
1.2
1.3
1.4
1.5
14 23 32 41 50 59 68 77 86 95 104 113
Outdoor intake air DB temperature(°F)
Capacity correction factors
79
75
68
64
72
Indoor intake air WB
temperature( F)
Indoor air Wet-bulb temperature
difference (°F)
MUZ-HE24NA
71
67
63
65 75 85 95 105 115
1.3
1.5
1.7
1.9
2.1
2.3
2.5
2.7
2.9
3.1
Indoor intake air WB temperature (°F)
SHF at rating condition = 0.75
= 634 CFM
Airflow
Outdoor intake air DB temperature (°F)
Total power consumption
(kW)
MUZ-HE15NA
71
67
63
65 75 85 95 105 115
0.8
0.9
1.0
1.1
1.2
1.3
1.4
Indoor intake air WB temperature (°F)
SHF at rating condition = 0.8
= 498 CFM
Airflow
Outdoor intake air DB temperature (°F)
Total power consumption
(kW)
MUZ-HE18NA
71
67
63
65 75 85 95 105 115
1.0
1.2
1.4
1.6
1.8
2.0
Indoor intake air WB temperature (°F)
SHF at rating condition = 0.71
= 498 CFM
Airflow
Outdoor intake air DB temperature (°F)
Total power consumption
(kW)
OBH686

19
Heating
MUZ-HE09NA
MUZ-HE12NA
This value of frequency is not the same as the actual frequency in operating. Refer to 7-5 and 7-6 for the relationships
between frequency and capacity.
MUZ-HE15NA
Indoor air Dry-bulb temperature
difference (°F)
Outdoor intake air WB temperature (°F)
-4 5 142332415059
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
Heating capacity ( at Rated frequency)
Capacity correction factor
59
68
79
Indoor intake air DB temperature ( F)
0 10203040506070
0.3
0.5
0.7
0.9
1.1
Indoor intake air DB temperature (°F)
= 413 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
75
70
65
75
70
65
0 10203040506070
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
Indoor intake air DB temperature (°F)
= 413 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
75
70
65
0 10203040506070
0.6
0.9
1.2
1.5
1.8
2.1
Indoor intake air DB temperature (°F)
= 463 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
OBH686

20
This value of frequency is not the same as the actual frequency in operating. Refer to 7-5 and 7-6 for the relationships
between frequency and capacity.
7-3. CONDENSING PRESSURE
Cooling
Data is based on the condition of indoor humidity 50 %.
Air flow should be set to High speed.
MUZ-HE09NA
68 70 75 80 85 90 95 100 105 (°F)
120
140
160
180
200
(PSIG)(PSIG)
6870 75 80 85 90 95 100 105(°F)
280
320
360
400
440
Condensing pressure
86
80
75
70
Suction pressure
Outdoor ambient temperature
Indoor DB temperature (°F)
Outdoor ambient temperature
Indoor DB temperature (°F)
86
80
75
70
MUZ-HE18NA
MUZ-HE24NA
75
70
65
0 10203040506070
0.5
0.9
1.3
1.7
2.1
2.5
Indoor intake air DB temperature (°F)
= 738 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
75
70
65
0 10203040506070
0.8
1.0
1.2
1.4
1.6
1.8
2.0
Indoor intake air DB temperature (°F)
= 512 CFM
Airflow
Outdoor intake air WB temperature (°F)
Total power consumption
(kW)
OBH686