Mitsubishi MUH-GA50VB-E1, MUH-GA60VB-E1, MUH-GA80VB-E1 Service Manual

Revision:A

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

• RoHS PARTS LIST has been added.

Please void OB368.

OUTDOOR UNIT

SERVICE MANUAL

HFC	No. OB368
utilized	REVISED EDITION-A
R410A

Wireless type

Models

MUH-GA50VB - E1

MUH-GA60VB - E1

MUH-GA80VB - E1

Indoor unit service manual

MSH-GA•VB Series (OB367)

CONTENTS

1.TECHNICAL CHANGES ················

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

3.SPECIFICATION····················

4.NOISE CRITERIA CURVES ···············

5.OUTLINES AND DIMENSIONS ·············

6.WIRING DIAGRAM ··················

7. REFRIGERANT SYSTEM DIAGRAM ···········

8. PERFORMANCE CURVES ···············

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

10. TROUBLESHOOTING·················

MUH-GA50VB

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

12. PARTS LIST······················

13. RoHS PARTS LIST···················

NOTE:

This service manual describes technical data of outdoor units. RoHS compliant products have <G> mark on the spec name plate.

For servicing of RoHS compliant products, refer to the RoHS Parts List.

Revision:A

• RoHS PARTS LIST has been added.

1 TECHNICAL CHANGES

MUH-A18WV - E1 MUH-GA50VB - E1

1.Oil separator has been removed.

2.Model name has been changed.

Indication of capacity has been changed. (BTU kW)

MUH-A24WV - E1 MUH-GA60VB - E1

MUH-A30WV - E1 MUH-GA80VB - E1

1.Model name has been changed.

Indication of capacity has been changed. (BTU kW)

INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT

•This room air conditioner adopts an HFC refrigerant (R410A) which never destroys the ozone layer.

•Pay particular attention to the following points, though the basic installation procedure is same as that for R22 conditioners.

1As R410A has working pressure approximate 1.6 times as high as that of R22, some special tools and piping parts/ materials are required. Refer to the table below.

2Take sufficient care not to allow water and other contaminations to enter the R410A refrigerant during storage and installation, since it is more susceptible to contaminations than R22.

3For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R410A. (Refer to 2. Refrigerant piping.)

4Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent composition change.

Refrigerant

Refrigerating

oil

	New refrigerant	Previous refrigerant
Refrigerant	R410A	R22
Composition (Ratio)	HFC-32: HFC-125 (50%:50%)	R22 (100%)
Refrigerant handling	Pseudo-azeotropic refrigerant	Single refrigerant
Chlorine	Not included	Included
Safety group (ASHRAE)	A1/A1	A1
Molecular weight	72.6	86.5
Boiling point (:)	-51.4	-40.8
Steam pressure [25:](Mpa)	1.557	0.94
Saturated steam density [25:](Kg/K)	64	44.4
Combustibility	Non combustible	Non combustible
ODP w1	0	0.055
GWP w2	1730	1700
Refrigerant charge method	From liquid phase in cylinder	Gas phase
Additional charge on leakage	Possible	Possible
Kind	Incompatible oil	Compatible oil
Color	Non	Light yellow
Smell	Non	Non

w1 :Ozone Depletion Potential	: based on CFC-11
w2 :Global Warming Potential	: based on CO2

2

New Specification

Current Specification

The incompatible refrigerating oil easily separates from

Since refrigerant and refrigerating oil are compatible each,

refrigerant and is in the upper layer inside the suction muffler.

refrigerating oil backs to the compressor through the lower

Raising position of the oil back hole enables to back the

position oil back hole.

Compressor

refrigerating oil of the upper layer to flow back to the

Compressor

Compressor

Oil back hole

compressor.

Suction muffler

Suction muffler

Refrigerating oil

Oil back hole

Refrigerant

Refrigerating oil /Refrigerant

NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system). The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/f [Gauge])

Conversion chart of refrigerant temperature and pressure

(MPa [Gauge]) 4.0

3.5

R410A

pressure	3.0							R22
liquid	2.5
	2.0												NOTE : The unit of pressure has been changed to MPa on the
	1.5
Saturated
													international system of units(SI unit system).
	1.0												The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/f [Gauge])
	0.5
	0.0
	-0.5
	-30		-20 -10 0 10 20 30 40 50 60 (:)

1.Tools dedicated for the air conditioner with R410A refrigerant

The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools.

The diameter of the service port on the stop valve in outdoor unit has been changed to prevent any other refrigerant being charged into the unit. Cap size has been changed from 7/16 UNF with 20 threads to 1/2 UNF with 20 threads.

	R410A tools	Can R22 tools be used?	Description
			R410A has high pressures beyond the measurement range of existing
	Gauge manifold	No	gauges. Port diameters have been changed to prevent any other refrigerant
			from being charged into the unit.
	Charge hose	No	Hose material and cap size have been changed to improve the pressure
			resistance.
	Gas leak detector	No	Dedicated for HFC refrigerant.
	Torque wrench	Yes	6.35 mm and 9.52 mm
		No	12.7 mm and 15.88 mm
	Flare tool	Yes	Clamp bar hole has been enlarged to reinforce the spring strength in the tool.
	Flare gauge	New	Provided for flaring work (to be used with R22 flare tool).
	Vacuum pump	New	Provided to prevent the back flow of oil. This adapter enables you to use
	adapter		vacuum pumps.
	Electronic scale for	New	It is difficult to measure R410A with a charging cylinder because the
	refrigerant charging		refrigerant bubbles due to high pressure and high-speed vaporization

No : Not Substitutable for R410A Yes : Substitutable for R410A

3

2.Refrigerant piping

1Specifications

Use the refrigerant pipes that meet the following specifications.

	Pipe	Outside diameter	Wall	Insulation material
		mm	thickness
	6.35		0.8 mm
	For liquid			Heat resisting foam plastic
			0.8 mm
	9.52
	12.7		0.8 mm	Specific gravity 0.045 Thickness 8 mm

For gas

15.881.0 mm

•Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm (6.35, 9.52, 12.7), 1.0 mm (15.88). Never use any pipe with a thickness less than 0.8 mm (6.35, 9.52, 12.7), 1.0 mm (15.88), as the pressure resistance is insufficient.

2Flaring work and flare nut

Flaring work for R410A pipe differs from that for R22 pipe.

For details of flaring work, refer to Installation manual “FLARING WORK”.

Pipe diameter	Dimension of flare nut
mm	R410A		R22
6.35	17		17
9.52	22		22
12.7	26		24
15.88	29		27

3.Refrigerant oil

Apply the special refrigeration oil (accessories: packed with indoor unit) to the flare and the union seat surfaces.

4.Air purge

•Do not discharge the refrigerant into the atmosphere.

Take care not to discharge refrigerant into the atmosphere during installation, reinstallation, or repairs to the refrigerant circuit.

•Use the vacuum pump for air purging for the purpose of environmental protection.

5.Additional charge

For additional charging, charge the refrigerant from liquid phase of the gas cylinder.

If the refrigerant is charged from the gas phase, composition change may occur in the refrigerant inside the cylinder and the outdoor unit. In this case, ability of the refrigerating cycle decreases or normal operation can be impossible. However, charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly.

Indoor unit

Refrigerant gas cylinder operating valve

Union

	Stop valve
Liquid pipe
Gas pipe	Outdoor unit

Service port

Gauge manifold valve (for R410A)

Charge hose (for R410A)

Refrigerant gas cylinder for R410A with siphon

Refrigerant (liquid)

Electronic scale for refrigerant charging

4

2 PART NAMES AND FUNCTIONS

MUH-GA50VB		MUH-GA60VB MUH-GA80VB
	Air inlet	Air inlet
		(back and side)
	(back and side)

Piping

Drainage hose

Air outlet

Air outlet

Drain outlet

ACCESSORIES

			MUH-GA50VB	MUH-GA60VB
				MUH-GA80VB
	1	Drain socket	1	1
	2	Drain cap {33	2	2
		Drain cap {16	1	—

5

3 SPECIFICATION

Outdoor model

Function

Power supply

	Capacity		Air flow(High)	K /h
			Capacity	kW
			Dehumidification	r/h
			Power outlet	A
	Electrical	data	Running current	A
			Power input	W
			Power factor	%
			Starting current	A
			Compressor motor current	A
			Fan motor current	A
	Coefficient of performance(C.O.P)
	Compressor		resistance(at 20:)
			Model
			Output	W
			Winding	"
	Fan	motor	Model	"
			Winding
			resistance(at 20:)
			Dimensions WOHOD	mm
			Weight	kg
			Sound level(High)	dB
		remarks	Fan speed(High)	rpm
	Special		Fan speed regulator
			capacity(R410A)
			Refrigerant filling	kg
			Refrigerating oil (Model)	cc
			Thermistor RT61(at 0:)	k"

NOTE: Test conditions are based on ISO5151. Cooling : Indoor DB27°C WB19°C

Outdoor DB35°C WB(24°C) Indoor-Outdoor piping length : 5m

MUH-GA50VB			MUH-GA60VB
Cooling	Heating		Cooling	Heating
Single phase				Single phase
230V, 50Hz				230V, 50Hz
5.0	5.2		6.3	7.2
2.5	—		3.2	—
2,196				2,760
15				25
7.93	7.23		10.39	10.70
1,720	1,550		2,350	2,420
94	93		98	98
37				74
7.54	6.84		9.81	10.12
0.39				0.58
2.81	3.23		2.61	2.90
RN196VHSHT				NN29VBAHT
1,300				1,900
C-R 1.80				C-R 0.80
C-S 3.00				C-S 1.64
RA6V50-PA				RA6V85-DA
WHT-BLK 79.5			WHT-BLK 68.8
BLK-RED 83.0			BLK-RED 93.1
850o605o290			840o850o330
47				74
52				53
828				730
1				1
1.80				2.35
520 (NEO22)			1,200 (NEO22)
33.18				33.18
Heating : Indoor	DB20°C	WB 15.5°C

Outdoor DB 7°C WB 6°C

6

Outdoor model

Function

Power supply

	Capacity	Capacity	kW
		Air flow(High/Low w)	K /h
		Dehumidification	R/h
		Power outlet	A
	Electrical data	Running current	A
		Power input	W
		Power factor	%
		Starting current	A
		Compressor motor current	A
		Fan motor current	A
	Coefficient of performance(C.O.P)
	Compressor	Model
		Output	W
		Winding	"
		resistance(at 20:)
	Fan motor	Model	"
		Winding
		resistance(at 20:)
		Dimensions WOHOD	mm
		Weight	kg
		Sound level(High/Loww)	dB
		Fan speed(High/Loww)	rpm
		Fan speed regulator
	Special remarks	Refrigerant filling	kg
		capacity(R410A)
		Refrigerating oil (Model)	cc
		Thermistor RT61(at 0:)	k"
		Thermistor RT62(at 25:)	k"
		Thermistor RT63(at 0:)	k"

NOTE: Test conditions are based on ISO5151. Cooling : Indoor DB27°C WB19°C

Outdoor DB35°C WB(24°C) Indoor-Outdoor piping length : 5m

w Reference value

	MUH-GA80VB
Cooling	Heating
	Single phase
	230V, 50Hz
8.5	9.4
4.6	—
2,940/1,470w	2,940/1,470w
	25
14.42	15.19
3,191	3,361
96	96
	90
13.85	14.62
	0.57
2.61	2.74
	NN37VAAHT
	2,500
	C-R 0.64
	C-S 1.63
	RA6V75-AD
WHT-BLK 62.8 BLK-YLW 55.9
	YLW-RED 26.0
	840o850o330
	77
	55/53 w
	805/435 w
	2
	2.40
	1,300 (NEO 22)
	33.18
	231.44
	33.18
Heating : Indoor DB20°C	WB 15.5°C

Outdoor DB 7°C WB 6°C

7

4 NOISE CRITERIA CURVES

MUH-GA50VB

MUH-GA60VB

FAN SPEED SPL(dB(A))

LINE

High 52

FAN SPEED SPL(dB(A))

LINE

High 53

Test conditions,	Test conditions,
Cooling : Dry-bulb temperature 35: Wet-bulb temperature 24:	Cooling : Dry-bulb temperature 35: Wet-bulb temperature 24:
Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:	Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR	90									OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR	90
	80										80
	70								NC-70		70								NC-70
	60										60
									NC-60										NC-60
	50										50
									NC-50										NC-50
	40										40
									NC-40										NC-40
	30										30
									NC-30										NC-30
	20	APPROXIMATE									20	APPROXIMATE
		THRESHOLD OF										THRESHOLD OF
		HEARING FOR							NC-20			HEARING FOR							NC-20
		CONTINUOUS										CONTINUOUS
	10	NOISE									10	NOISE
		63	125	250	500	1000	2000	4000	8000			63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

BAND CENTER FREQUENCIES, Hz

MUH-GA80VB

FAN SPEED SPL(dB(A))

LINE

High 55

Test conditions,

Cooling : Dry-bulb temperature 35: Wet-bulb temperature 24: Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:

BAR	90
MICRO	80
0.0002	70								NC-70
dB re	60
LEVEL,
									NC-60
PRESSURE	50
									NC-50
	40
									NC-40
SOUND
	30
BAND									NC-30
	20	APPROXIMATE
OCTAVE
		THRESHOLD OF
		HEARING FOR							NC-20
		CONTINUOUS
	10	NOISE
		63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

OUTDOORUNIT

1m

MICROPHONE

8

5 OUTLINES AND DIMENSIONS

MUH-GA50VB

	Drainage	355	20
		350
	hole [16.2
		Air in
	35
248	90
	Air in
	Drainage	Air out
	3holes [33

605

292
20	183
	500
	850

MUH-GA60VB MUH-GA80VB

	515
	299
66	40

51

34

330

500

840

121

850

430

Unit: mm

REQUIRED SPACE

or more

100mm

100mm

more

or

1

0

0m

m

or m

290

310

345

ore

m

re

350mm

o

m

r

0

o

or

0

m

more

50

5

30

Service panel

Liquid refrigerant

pipe joint

Refregerant pipe

(flared) [6.35

-

-

30

35

157

100

Gas refregerant

pipe joint

161Refregerant pipe (flared) [12.7

74

REQUIRED SPACE

100mm or more

360

80Open as a rule

500mm or more if the back, both sides and top are open

155

90

9

Open as a rule 500mm or more if the front and both sides are open

100mm or more 200mm or more if there are obstacles to both sides

350mm or more

Service panel

Liquid refrigerant pipe joint Refrigerant pipe

(flared) [6.35 (MUH-GA60VB) [9.52 (MUH-GA80VB)

	-
	30
	-
	35
	Gas refrigerant
	pipe joint
198	Refrigerant pipe
	(flared) [15.88

6 WIRING DIAGRAM

MUH-GA50VB

TO	TB2
		3	RED
INDOOR UNIT
CONNECTING		N BLK
12V
	TB1 BRN
CIRCUIT BREAKER		L	BRN	DSAR
POWER SUPPLY		N BLU
~/N
230V 50Hz

RT61

3	CN730	CN661
1
2
	F61	T61

21S4

CN721

SR62

SR61

NR61

MF

REDORNWHTBLK

1 2 3 4

CN711

1WHT

2BLK

3RED

C65

		PE		TAB20	52C
		GRN/YLW			4 3	DEICER P.C. BOARD
							S MC R
							WHT	C
				BLU	C1	RED
						BLK
SYMBOL	NAME		SYMBOL		NAME		SYMBOL	NAME
C1	COMPRESSOR CAPACITOR		MF	OUTDOOR FAN MOTOR (INNER PROTECTOR) TB1,TB2				TERMINAL BLOCK
C65	OUTDOOR FAN CAPACITOR		NR61	VARISTOR			21S4	R.V. COIL
DSAR	SURGE ABSORBER		RT61	DEFROST THERMISTOR			52C	COMPRESSOR CONTACTOR
F61	FUSE (2A)		SR61,SR62 SOLID STATE RELAY
MC	COMPRESOR (INNER PROTECTOR)		T61	TRANSFORMER
NOTES: 1.About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.
2.Use copper conductors only. (For field wiring)
3.Symbols below indicate.
	: Terminal block	: Connector

MUH-GA60VB

CIRCUIT BREAKER

	SUPPLYPOWER	230VN/ 50Hz	L TB1
			N
			PE
	CONNECTING	~	3 TB2GRN/YLW
	INDOORUNIT	12V	N
	TO

RT61

BLKBLK

MF

BRN

DSAR

WHTWHT

ORN

RED

4 3

2

1

RED

C2

ORN

CN661

1

2

3

CN711

CN721

X62

X52

X62

1

21S4

SR61

2

COM

NO

3

X52

TAB52

COM

NO

CN730

7

DEICER

T61

5

NR61

F61

3

P.C. BOARD

1

BRN

BLU

BRN 3

4

WHT

C

52C

C1 RED S MC R

BLU

BLK

BLU

A1 52C A2

BLU

RED

BLU

SYMBOL NAME

C1	COMPRESSOR CAPACITOR
C2	OUTDOOR FAN CAPACITOR
DSAR	SURGE ABSORBER
F61	FUSE (3.15A)
MC	COMPRESSOR (INNER PROTECTOR)
MF	OUTDOOR FAN MOTOR (INNER PROTECTOR)
NR61	VARISTOR
RT61	DEFROST THERMISTOR
SR61	SOLID STATE RELAY
TB1	TERMINAL BLOCK
TB2	TERMINAL BLOCK
T61	TRANSFORMER
X52	CONTACTOR
X62	R. V. COIL RELAY
21S4	R. V. COIL
52C	COMPRESSOR CONTACTOR

NOTES: 1.Use copper conductors only (For field wiring).

2.Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers (3,N). 3.Symbols below indicate.

: Terminal block, : Connector

10

MUH-GA80VB

CIRCUIT BREAKER

POWERSUPPLY	~/ N 230V 50Hz	L TB1
			GRN/YLW
		N
			PE
CONNECTING		3	TB2
INDOORUNIT	12V	N
TO

RT61 RT62 RT63

BRN

DSAR

CN661 CN662

X62 X52

DEICER

P.C. BOARD

BRN

BLU

BRN 1

2

52C

WHT CZ WHT

BLU

BLU

MF

LEV		YLW	BLK	WHT	ORN	RED
6	6	5	4	3	2	1	RED
		YLW	BLK	WHT		ORN C2
CN724		1	2	3	CN711			CN721
SR62					X62			1	21S4
SR61								2
					COM			3
								NO
					X52			TAB52
					COM			NO
						CN730 7
T61								5
		NR61				F61		3
								1
WHT								C
				C1 RED S MC R
						BLK
A1 52C A2									BLU
									RED
									BLU

SYMBOL	NAME	SYMBOL	NAME	SYMBOL	NAME
CZ	CZ SURGE ABSORBER	MF	OUTDOOR FAN MOTOR (INNER PROTECTOR)	TB1	TERMINAL BLOCK
C1	COMPRESSOR CAPACITOR	NR61	VARISTOR	TB2	TERMINAL BLOCK
C2	OUTDOOR FAN CAPACITOR	RT61	DEFROST THERMISTOR	T61	TRANSFORMER
DSAR	SURGE ABSORBER	RT62	DISCHARGE TEMPERATURE THERMISTOR	X52	CONTACTOR
F61	FUSE(3.15A)	RT63	AMBIENT TEMPERATURE THERMISTOR	X62	R.V. COIL RELAY
LEV	EXPANSION VALVE COIL	SR61	SOLID STATE RELAY	21S4	R.V. COIL
MC	COMPRESSOR (INNER PROTECTOR)	SR62	SOLID STATE RELAY	52C	COMPRESSOR CONTACTOR

NOTES: 1.Use copper conductors only (For field wiring).

2.Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers (3,N). 3.Symbols below indicate.

: Terminal block, : Connector

11

7 REFRIGERANT SYSTEM DIAGRAM

MUH-GA50VB			Unit:mm
Refrigerant pipe [12.7	4- way valve
(with heat insulator)
Stop valve
(with service port)		Muffler	Outdoor
Flared connection		Defrost	heat
			exchanger
		thermistor
		RT61

			Compressor
							Capillary tube
Flared connection							[3.0o[1.6o750
		Capillary tube					(2 pcs)
			[3.0o[1.6o450				R.V. coil
							Heating ON
	Stop	Strainer					Cooling OFF
			Capillary tube
Refrigerant pipe [6.35	valve	#100	Check valve [3.0	o	[1.6	o	300

(with heat insulator)

MUH-GA60VB

Refrigerant pipe [15.88		4- way valve
(with heat insulator)
	Stop valve
	(with service port)
Flared connection			Muffler	Outdoor
		Muffler	#100	heat
				exchanger

	Compressor	Defrost
		thermistor
		RT61

Flared connection	Capillary tube
	[3.0X[2.0X750
Receiver
Stop valve	Strainer	Capillary tube	R.V. coil
Refrigerant pipe [6.35	#100	[3.0X[2.0X750	Heating ON
	Check valve		Cooling OFF

(with heat insulator)

Refrigerant flow in cooling

Refrigerant flow in heating

12

MUH-GA80VB

Unit:mm

Refrigerant pipe [15.88			Muffler
	4-way valve		#100
(with heat insulator)
	Stop valve
	(with service port)					Outdoor
Flared connection			Discharge			heat
			temperature			exchanger
			thermistor		Defrost
			RT62		thermistor
					RT61
	Muffler
			Compressor			Ambient
						temperature
						thermistor
						RT63
Flared connection				LEV
		Strainer			Strainer
	Receiver					R.V. coil
		#100			#100
						heating ON
	Stop valve	Capillary tube				cooling OFF
Refrigerant pipe [9.52		[3.6 [2.4 50			Refrigerant flow in cooling
(with heat insulator)					Refrigerant flow in heating

MAX. REFRIGERANT PIPING LENGTH

		Refrigerant piping	Piping size O.D : mm
	Model	Max. length : m
		A	Gas	Liquid
	MUH-GA50VB	25	12.7	6.35
	MUH-GA60VB		15.88
	MUH-GA80VB
		30		9.52

MAX. HEIGHT DIFFERENCE

Indoor unit

wMax. Height	Refrigerant Piping
difference:
10m(MSH-GA50/GA60VB)/	Max. Length
15m(MSH-GA80VB)

A

Outdoor unit

wHeight difference should be within 10m(MSH-GA50VB/GA60VB)/ 15m(MSH-GA80VB) regardless of which unit, indoor or outdoor position is high.

13

ADDITIONAL REFRIGERANT CHARGE(R410A : g)

Model

Outdoor unit precharged

Refrigerant piping length (one way)

7m

10m

15m

20m

25m

MUH-GA50VB

1,800

0

60

160

260

360

Calculation : Xg=20g/m (Refrigerant piping length (m)–7)

Model

Outdoor unit precharged

Refrigerant piping length (one way)

7m

10m

15m

20m

25m

MUH-GA60VB

2,350

0

60

160

260

360

Calculation : Xg=20g/m (Refrigerant piping length (m)–7)

Model

Outdoor unit

Refrigerant piping length (one way)

precharged

7m

10m

15m

20m

25m

30m

MUH-GA80VB

2,400

0

165

440

715

990

1,265

Calculation : Xg=55g/mo(Refrigerant piping length(m)-7)

14

8 PERFORMANCE CURVES

MUH-GA50VB MUH-GA60VB MUH-GA80VB

The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions, since operating conditions vary according to the areas where these units are installed. The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.

(1)GUARANTEED VOLTAGE

198 ~ 264V, 50Hz

(2)AIR FLOW

	Air flow should be set at MAX.
	(3) MAIN READINGS			}
	(1)	Indoor intake air wet-bulb temperature :	°CWB
	(2)	Indoor outlet air wet-bulb temperature :	°CWB		Cooling
	(3)	Outdoor intake air dry-bulb temperature :	°CDB
	(4)	Total input:	W	}
	(5)	Indoor intake air dry-bulb temperature :	°CDB
	(6)	Outdoor intake air wet-bulb temperature :	°CWB		Heating
	(7)	Total input :	W

Indoor air wet/dry-bulb temperature difference on the left side of the chart on this page and next page shows the difference between the indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your reference at service.

How to measure the indoor air wet-bulb/dry-bulb temperature difference

1.Attach at least 2 sets of wet and dry-bulb thermometers to the indoor air intake as shown in the figure, and at least 2 sets of wet and dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air speed is high.

2.Attach at least 2 sets of wet and dry-bulb thermometers to the outdoor air intake. Cover the thermometers to prevent direct rays of the sun.

3.Check that the air filter is cleaned.

4.Open windows and doors of room.

5.Press the EMERGENCY OPERATION switch once(twice) to start the EMERGENCY COOL(HEAT) MODE.

6.When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.

7.10 minutes later, measure temperature again and check that the temperature does not change.

INDOOR UNIT

OUTDOOR UNIT

Wet and dry-bulb thermometers

Wet and dry-bulb thermometers

12.8										17.2			19.2
11.6												15.6	17.4
10.5											14.1		15.6
9.5								12.6					13.9
8.5									11.2				12.4
7.5							9.8						10.8
MSH-GA50VB	MUH-GA50VB					MSH-GA60VB MUH-GA60VB							MSH-GA80VB MUH-GA80VB

15

Dry-bulb temperature

20

25

30

2 Air flow should be set at MAX.

26.6 36.8 38.4

24.5 34.0 35.5

22.531.1 32.5

20.428.3 29.6

18.425.5 26.6

16.322.6 23.6

14.319.8 20.7

12.3 17.0 17.7

MSH-GA50VB MUH-GA50VB

MSH-GA60VB MUH-GA60VB

MSH-GA80VB MUH-GA80VB

NOTE:The above curves are for the heating operation without any frost.

OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation

1 Both indoor and outdoor unit are under the same temperature/humidity condition. Relative humidity(%)

50

60

70

3The unit of pressure has been changed to MPa on the international system of units(SI unit system). The conversion factor is : 1(MPa [Gauge]) =10.2(kgf/f [Gauge])

(kgf/F[Gauge])(MPa[Gauge]) MUH-GA50VB

	13				1.3
lowpressure					1.2								230V
	12
					1.1
	11
					1.0
	10
Outdoor					0.9
	9
					0.8
	8
					0.7
	7
								18 20						35(:)
			15							25		30 32
								50		60		70(%)
						Ambient temperature(˚C)
						Ambient humidity(%)
(kgf/F[Gauge])(MPa[Gauge]) MUH-GA60VB
	11		1.1
													230V
lowpressure	10		1.0
	9		0.9
	8		0.8
Outdoor
	7		0.7
	6			0.6
								18 20						35(:)
			15							25		30 32
								50		60		70(%)

Ambient temperature(˚C)

Ambient humidity(%)

16

Outdoor unit current (A)

Outdoor unit current (A)

MUH-GA50VB

8

230V

7

6

5

15 18 20	25	30 32 35(:)
50	60	70(%)

Ambient temperature(˚C)

Ambient humidity(%)

MUH-GA60VB

11

230V

10

9

8

Ambient temperature(˚C)

Ambient humidity(%)