Mitsubishi Electric MSZ-WR NA Series Manuale utente

Models

MUZ-WR09NA -U1

MUZ-WR12NA -U1

MUZ-WR18NA -U1

MUZ-WR24NA -U1

HFC

utilized

R410A

MUZ-WR24NA

PARTS CATALOG (OBB819)

SERVICE MANUAL

No. OBH819

REVISED EDITION-A

Indoor unit service manual

MSZ-WR•NA Series (OBH818)

CONTENTS

1. TECHNICAL CHANGES ······························2

2. PART NAMES AND FUNCTIONS··················3

3. SPECIFICATION ········································4

4. OUTLINES AND DIMENSIONS·····················7

5. WIRING DIAGRAM·····································9

6. REFRIGERANT SYSTEM DIAGRAM ··········· 11

7. DATA······················································ 14

8. ACTUATOR CONTROL ····························· 24

9. SERVICE FUNCTIONS······························ 25

10. TROUBLESHOOTING ······························· 26

11. DISASSEMBLY INSTRUCTIONS················· 50

OUTDOOR UNIT

OBH819 is void.

Revision A:

• 7. DATA has been corrected.

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.

1TECHNICAL CHANGES

MUZ-WR09NA - U1

MUZ-WR12NA - U1

MUZ-WR18NA - U1

MUZ-WR24NA - U1

1. New model

Revision A:

• 7. DATA has been corrected.

OBH819A

MUZ-WR24NA

Piping

Air outlet

Drain outlet

Air inlet

(back and side)

Drain hose

PART NAMES AND FUNCTIONS

MUZ-WR09NA MUZ-WR12NA MUZ-WR18NA

Air outlet

Drain outlet

Piping

Drain hose

Air inlet

(back and side)

OBH819A

3SPECIFICATION

Outdoor unit model MUZ-WR09NA MUZ-WR12NA

Capacity

Rated (Minimum~Maximum)

Cooling 1 Btu/h 9,000 ( 3,800 - 10,000 ) 12,000 ( 3,800 - 12,200 )

Heating 47 1 Btu/h 10,900 ( 4,500 - 11,800 ) 12,200 ( 4,500 - 14,500 )

Capacity

Rated (Maximum) Heating 17 2 Btu/h 6,700 (7,200) 7,600 (9,000)

Power consumption

Rated (Minimum~Maximum)

Cooling 1 W 820 (240 - 930) 1,330 (240 - 1,400)

Heating 47 1 W 980 (240 - 1,090) 1,090 (240 - 1,340)

Power consumption

Rated (Maximum) Heating 17 2 W 760 (850) 880 (1,090)

EER 1 [SEER] 3Cooling 11.0 [ 16.0 ] 9.0 [ 16.0 ]

HSPF IV 4Heating 8.5

COP Heating 13.25 3.28

Power factor Cooling (208/230) % 87/87 95/95

Heating (208/230) % 90/90 93/93

Power supply V , phase , Hz 208/230 , 1 , 60

Max. fuse size (time delay) A 15

Min. circuit ampacity A 9

Fan motor F.L.A A 0.50

Compressor

Model KNB073FRVMC

R.L.A A 6.2

L.R.A A 7.7

Refrigeration oil

ﬂoz. (L) (Model)

9.1 (0.27) (FV50S)

Refrigerant control Linear expansion valve

Sound level 1Cooling dB(A) 48 51

Heating dB(A) 50 51

Airﬂow

High - Med. - Low

Cooling CFM 1,063 - 1,063 - 1,063

Heating CFM 1,282 - 1,105 - 1,105

Fan speed

High - Med. - Low

Cooling rpm 740 - 740 - 740

Heating rpm 890 - 770- 770

Defrost method Reverse cycle

Dimensions

W in. 31-1/2

D in. 11-1/4

H in. 21-5/8

Weight Ib. 73

External ﬁnish Munsell 3Y 7.8/1.1

Refrigerant piping Not supplied

Refrigerant pipe size

(Min. wall thickness)

Liquid in. 1/4 (0.0315)

Gas in. 3/8 (0.0315)

Connection method Indoor Flared

Outdoor Flared

Between the indoor &

outdoor units

Height difference ft. 40

Piping length ft. 65

Refrigerant charge (R410A) 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.)

OBH819A

Outdoor unit model MUZ-WR18NA MUZ-WR24NA

Capacity

Rated (Minimum~Maximum)

Cooling 1 Btu/h 17,200 (5,800 - 18,000) 22,500 (5,800 - 22,500)

Heating 47 1 Btu/h 18,000 (5,400 - 20,900) 26,000 (5,400 - 26,000)

Capacity

Rated (Maximum) Heating 17 2 Btu/h 11,500 (15,000) 18,500 (18,500)

Power consumption

Rated (Minimum~Maximum)

Cooling 1 W 1,720 (350 - 2,170) 2,810 (330 - 2,810)

Heating 47 1 W 1,670 (330 - 2,360) 2,680 (320 - 2,680)

Power consumption

Rated (Maximum) Heating 17 2 W 1,360 (2,040) 2,460 (2,460)

EER 1 [SEER] 3Cooling 10.0 [16.0] 8.0 [16.0]

HSPF IV 4Heating 8.5 8.5

COP Heating 13.16 2.84

Power factor Cooling (208/230) % 98/98 99/99

Heating (208/230) % 97/97 99/99

Power supply V , phase , Hz 208/230, 1, 60

Max. fuse size (time delay) A 15

Min. circuit ampacity A 10 14

Fan motor F.L.A A 0.50 0.93

Compressor

Model SNB130FQBMT

R.L.A A 7.4 10

L.R.A A 9.3 12.5

Refrigeration oil

ﬂoz. (L) (Model)

11.8 (0.35) (FV50S)

Refrigerant control Linear expansion valve

Sound level 1Cooling dB(A) 53 57

Heating dB(A) 51 55

Airﬂow

High - Med. - Low

Cooling CFM 1,102 - 1,102 - 639 1,742 - 1,742 - 922

Heating CFM 1,186 - 1,045 - 1,045 1,691 - 1,691 - 1,372

Fan speed

High - Med. - Low

Cooling rpm 810 - 810 - 490 840 - 840 - 450

Heating rpm 870 - 770 - 770 810 - 810 - 650

Defrost method Reverse cycle

Dimensions

W in. 31-1/2 33-1/16

D in. 11-1/4 13

H in. 21-5/8 34-5/8

Weight Ib. 81 121

External ﬁnish Munsell 3Y 7.8/1.1 Munsell 3Y 7.8/1.1

Refrigerant piping Not supplied Not supplied

Refrigerant pipe size

(Min. wall thickness)

Liquid in. 1/4 (0.0315) 3/8 (0.0315)

Gas in. 1/2 (0.0315) 5/8 (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) 2 lb. 10 oz. 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

3: Test condition (Refer to page 9.)

4: Test condition (Refer to page 9.)

OBH819A

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 tate

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 5 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 5 70 60 35 33

5: At intermediate compressor speed

= ("Rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".

3, 4

(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 32 —

Maximum humidity 78 % —

Heating

Standard temperature 70 60 47 43

Maximum temperature 80 67 75 65

Minimum temperature 70 60 5 4

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

OBH819A

OUTLINES AND DIMENSIONS

Unit: inch

MUZ-WR09NA MUZ-WR12NA MUZ-WR18NA

4 in. (100 mm)

or more

14 in. (350 mm)

or more

8 in. (200 mm)

or more *2

4 in. (100 mm)

or more

Liquid refrigerant pipe joint

Refrigerant pipe (flared) Ø 1/4

Gas refrigerant pipe joint

Refrigerant pipe (flared) Ø 3/8 (WR09/12)

Ø 1/2 (WR18)

REQUIRED SPACE

clear *1

*1 4 in. (100 mm) 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

holes

OBH819A

MUZ-WR24NA Unit: inch

16-7/16

1-9/16

1-5/8

Drain hole

6-7/8 19-11/16

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

Liquid refrigerant pipe joint

Refrigerant pipe (flared) Ø 3/8

Gas refrigerant pipe joint

Refrigerant pipe (flared) Ø 5/8

*1 20 in. (500 mm) or more when front

and sides of the unit are clear

14 in. (350 mm)

or more

4 in. (100 mm)

or more

REQUIRED SPACE

Clear *1

4 in. (100 mm)

or more

20 in. (500 mm)

or more *2

*2 When any 2 sides of left, right

and rear of the unit are clear

OBH819A

5WIRING DIAGRAM

MUZ-WR09NA MUZ-WR12NA

MUZ-WR18NA

OBH819A

MUZ-WR24NA

OBH819A

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