Mitsubishi MUX-2A28VB-E1, MUX-2A59VB-E1, MUX-3A60VB-E1, MUX-3A63VB-E1, MUX-2A70VB-E1 Service Manual
...
HFC
utilized
R410A
SPLIT-TYPE, AIR CONDITIONERS
OUTDOOR UNIT
SERVICE MANUAL
Multi system type
Models
Revision B:
● RoHS PARTS LIST has been added.
Please void OB384 REVISED EDITION-A.
No. OB384
REVISED EDITION-B
MUX-2A28VB MUX-2A59VB MUX-3A60VB MUX-3A63VB MUX-2A70VB MUX-4A73VB -
MUX-3A60VB
MUX-3A63VB
NOTE:
• This service manual describes technical data of the
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.
E1
E1
E1
E1
E1
E1
Indoor unit service manual
MSC-CA·VB Series (OB393)
MSC-GA·VB Series (OB385)
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················6
3. INDOOR / OUTDOOR
CORRESPONDENCE TABLE ···························6
4. SPECIFICATION·················································7
5. NOISE CRITERIA CURVES·····························12
6. OUTLINES AND DIMENSIONS······················ 13
7. WIRING DIAGRAM ··········································16
8. REFRIGERANT SYSTEM DIAGRAM··············21
9. PERFORMANCE CURVES······························32
10. ACTUA TOR CONTROL····································55
11. TROUBLESHOOTING ······································56
12. DISASSEMBLY INSTRUCTIONS·····················63
13. PARTS LIST······················································68
14. RoHS PARTS LIST···········································74
Revision A:
• WIRING DIAGRAM , REFRIGERANT SYSTEM DIAGRAM and PARTS LIST (Numbers of the terminal blocks) have been
changed.
Revision B:
• RoHS PARTS LIST has been added.
1
MUX-A10WV- ➔MUX-2A28VB-
MUX-A20WV- ➔MUX-3A60VB-
1. Indication of capacity has been changed. (BTU➔kW)
MUX-A19WV- ➔MUX-2A59VBMUX-A22WV- ➔MUX-3A63VBMUX-A25WV- ➔MUX-2A70VBMUX-A26WV- ➔MUX-4A73VB-
1. Indication of capacity has been changed. (BTU➔kW)
2. Size of stop valve (Gas) has been changed. ([12.7➔[9.52)
TECHNICAL CHANGES
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
2
Refrigeration
oil
Refrigerant
New refrigerant
R410A
HFC-32: HFC-125 (50%:50%)
Pseudo-azeotropic refrigerant
Not included
A1/A1
72.6
-51.4
1.557
64
Non combustible
0
1730
From liquid phase in cylinder
Possible
Incompatible oil
Non
Non
Previous refrigerant
R22
R22 (100%)
Single refrigerant
Included
A1
86.5
-40.8
0.94
44.4
Non combustible
0.055
1700
Gas phase
Possible
Compatible oil
Light yellow
Non
Refrigerant
Composition (Ratio)
Refrigerant handling
Chlorine
Safety group (ASHRAE)
Molecular weight
Boiling point (:)
Steam pressure [25:](Mpa)
Saturated steam density [25:](Kg/K)
Combustibility
ODP w1
GWP w2
Refrigerant charge method
Additional charge on leakage
Kind
Color
Smell
w1:Ozone Destruction Parameter : based on CFC-11
w2 :Global Warmth Parameter : based on CO
2
INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT
New Specification Current Specification
The incompatible refrigeration oil easily separates from
refrigerant and is in the upper layer inside the suction muffler.
Raising position of the oil back hole enables to back the
refrigeration oil of the upper layer to flow back to the
compressor.
Since refrigerant and refrigeration oil are compatible each,
refrigeration oil goes back to the compressor through the
lower position oil back hole.
Compressor
Suction muffler
Oil back hole
Refrigeration oil
Refrigerant
Compressor
Suction muffler
Oil back hole
Refrigeration oil /Refrigerant
Compressor
• This room air conditioner adopts 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.
1 As 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.
2 Take 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.
3 For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R410A. (Refer to 2. Refrigerant
piping.)
4 Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent
composition change.
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/ff[Gauge])
3
-30 -20 -10 0 10 20
30
40 50 60
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
(MPa [Gauge])
R410A
R22
Conversion chart of refrigerant temperature and pressure
Saturated liquid pressure
(:)
NOTE : The unit of pressure has been changed to MPa on the
R410A tools
Can R22 tools be used?
Gas leak detector
R410A has high pressures beyond the measurement range of existing
gauges. Port diameters have been changed to prevent any other refrigerant
from being charged into the unit.
Hose material and cap size have been changed to improve the pressure
resistance.
Dedicated for HFC refrigerant.
6.35 mm and 9.52 mm
Description
Clamp bar hole has been enlarged to reinforce the spring strength in the tool.
Provided for flaring work (to be used with R22 flare tool).
Provided to prevent the back flow of oil. This adapter enables you to use
vacuum pumps.
It is difficult to measure R410A with a charging cylinder because the
refrigerant bubbles due to high pressure and high-speed vaporization
No
No
No
Yes
Yes
New
New
New
Gauge manifold
Charge hose
Torque wrench
Flare tool
Flare gauge
Vacuum pump
adapter
Electronic scale for
refrigerant charging
No : Not Substitutable for R410A Yes : Substitutable for R410A
Wall
thickness
Outside diameter
Pipe
mm
For liquid
For gas
6.35
9.52
0.8 mm
0.8 mm
Heat resisting foam plastic
Specific gravity 0.045 Thickness 8 mm
Insulation material
international system of units(SI unit system).
The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ff[Gauge])
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.
2.Refrigerant piping
1 Specifications
Use the refrigerant pipes that meet the following specifications.
• Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm. Never use any pipe with a thickness less
than 0.8mm, as the pressure resistance is insufficient.
4
2 Flaring 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
mm
6.35
9.52
Dimension of flare nut
R410A
17
22
R22
17
22
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 refrigeration 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.
Union
Stop valve
Indoor unit
Refrigerant gas
cylinder
operating valve
Liquid pipe
Gas pipe
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
Outdoor unit
5
2
Air inlet
Piping
Drain hose
Air outlet
Drain outlet
(back and side)
Air inlet
Piping
Drainage hose
(Back and side)
Air outlet
Drain outlet
Air outlet
Drain outlet
Air inlet
Piping
Drainage hose
(Back and side)
Combination of
the connectable
indoor units
A: MSC-CA35VB
or
MSC-GA35VB
B: MSC-CA20VB
or
MSC-GA20VB
A: MSC-CA25VB
B: or
C: MSC-GA25VB
A:
B:
A:
B:
A: MSC-CA35VB
or
MSC-GA35VB
B: MSC-CA20VB
or
C: MSC-GA20VB
MUX-2A59VB
MUX-3A63VB
MUX-3A60VBMUX-2A28VB
MUX-2A70VB
MUX-4A73VB
A: MSC-CA35VB
or
B: MSC-GA35VB
C: MSC-CA25VB
or
D: MSC-GA25VB
MSC-CA35VB
or
MSC-GA35VB
MSC-CA20VB
or
MSC-GA20VB
OUTDOOR UNIT
PART NAMES AND FUNCTIONS
MUX-2A28VB
MUX-2A59VB MUX-3A63VB
MUX-4A73VB
MUX-3A60VB MUX-2A70VB
INDOOR / OUTDOOR CORRESPONDENCE TABLE3
MUX-2A28VB MUX-2A59VB MUX-3A60VB MUX-3A63VB
MUX-2A70VB MUX-4A73VB
6
4
Outdoor model
Function
Capacity
Dehumidification
Outdoor air flow
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding
resistance (at 20:)
Model
Winding
resistance (at 20:)
Dimensions WOHOD
Weight
Sound level
Fan speed
Fan speed regulator
Refrigerant filling
capacity (R410A)
Refrigeration oil (Model)
kW
R/h
K /h
A
A
W
A(kW)
%
A
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
MUX-2A28VB
Cooling
Single phase
230V,50Hz
1,914
10
—
21
0.29
RN092VHSHT
600
C-R 3.87
C-S 6.14
RA6V33-FC
WHT-BLK 223
BLK-RED 221
780O540O255
35
49
825
1
0.90 (Room A+B)
350 (NEO22)
Single
A or B
2.4
0.9
3.20
725
98.5
2.91
3.16
Single
A
3.5
1.4
5.73
1,280
97.1
5.16
2.65
Double
A+B
3.5+2.4
1.4+0.9
8.96
2,005
97.3
8.39
2.84
Double
A+B
1.4O2
0.2O2
3.25
730
97.7
2.96
3.50
MUX-2A59VB
Cooling
Single phase
230V,50Hz
Compressor
Electrical
data
Fan
motor
Special
remarks
Capacity
Coefficient of performance (C.O.P)
Outdoor unit power supply
Indoor unit No.
Single
B
2.4
0.9
2,460
20
3.51
785
—
97.2
48
2.94
0.57
2.93
MC1 : RN145VHSHT, MC2 : RN092VHSHT
MC1 : 1,000, MC2 : 600
RA6V60-GA
WHT-BLK 90
BLK-RED 146
840O640O330
66
52
730
1
1.00 (Room A)
0.80 (Room B)
MC1 : 620 (NEO22), MC2 : 350 (NEO22)
C-R 2.43
C-S 3.80
MC1 : , MC2 :
C-R 3.87
C-S 6.14
SPECIFICATION
NOTE: As for specification of the indoor units, refer to indoor unit service manual.
NOTE: Test conditions are based on ISO 5151.
Cooling : Indoor DB27°C WB19°C
Outdoor DB35°C WB24°C
Indoor-Outdoor piping length : 5m
7
Outdoor model
Function
Capacity
Dehumidification
Outdoor air flow
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding
resistance (at 20:)
Model
Winding
resistance (at 20:)
Dimensions WOHOD
Weight
Sound level
Fan speed
Fan speed regulator
Refrigerant filling
capacity (R410A)
Refrigeration oil (Model)
kW
R/h
K /h
A
A
W
A(kW)
%
A
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
Single phase
230V,50Hz
Double
A+B or A+C
2.6+2.8
0.9+1.1
2,460
20
8.18
1,850
—
98.3
47
7.61
0.57
2.81
MC1 : RN099VHSHT, MC2 : RN125VHSHT
MC1 : 650, MC2 : 800
RA6V60-GA
WHT-BLK 90
BLK-RED 146
840O640O330
65
52
730
1
0.80 (Room A)
1.00 (Room B+C)
MC1 : 350 (NEO22), MC2 : 350 (NEO22)
MUX-3A60VB
Cooling
Compressor
Electrical
data
Fan
motor
Special
remarks
Capacity
Coefficient of performance (C.O.P)
Outdoor unit power supply
Indoor unit No.
Single
A
2.6
0.9
3.64
815
97.3
3.07
3.06
Single
B or C
2.9
1.2
4.86
1,075
96.2
4.29
2.61
Double
B+C
1.75O2
0.3O2
4.86
1,090
97.5
4.29
3.02
Triple
A+B+C
2.5+1.75O2
0.8+0.3O2
8.41
1,885
97.5
7.84
3.02
C-R 3.40
C-S 4.56
MC1 : , MC2 :
C-R 2.86
C-S 5.72
NOTE: As for specification of the indoor units, refer to indoor unit service manual.
NOTE: Test conditions are based on ISO 5151.
Cooling : Indoor DB27°C WB19°C
Indoor-Outdoor piping length : 5m
Outdoor DB35°C WB24°C
8
NOTE: As for specification of the indoor units, refer to indoor unit service manual.
Outdoor model
Function
Outdoor unit power supply
Indoor unit No.
Capacity
Dehumidification
Outdoor air flow
Capacity
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Electrical
data
Starting current
Compressor motor current
Fan motor current
kW
R/h
K /h
A
A
W
A(kW)
%
A
A
A
Coefficient of performance (C.O.P)
Model
Output
Winding
Compressor
resistance (at 20:)
W
"
Model
Winding
Fan
motor
resistance (at 20:)
Dimensions WOHOD
Weight
Sound level
Fan speed
"
mm
kg
dB
rpm
Fan speed regulator
Refrigerant filling
Special
remarks
capacity (R410A)
Refrigeration oil (Model)
kg
cc
NOTE: Test conditions are based on ISO 5151.
Cooling : Indoor DB27°C WB19°C
Outdoor DB35°C WB24°C
Indoor-Outdoor piping length 5m
Single
A
3.5
1.4
5.73
1,280
97.1
5.02
2.65
MUX-3A63VB
Cooling
Single phase
230V,50Hz
Single
B or C
2.4
0.9
Double
A+B or A+C
3.5+2.4
1.4+0.9
Double
B+C
1.45O2
0.4
2,460
20
3.64
815
8.92
1,975
3.69
830
—
97.3
96.3
97.8
48
2.99
8.01
2.99
0.57
2.82
2.88
3.22
MC1 : RN145VHSHT, MC2 : RN092VHSHT
MC1 : 1,000, MC2 : 600
C-R 2.43
MC1 : , MC2 :
C-S 3.80
C-R 3.87
C-S 0.14
RA6V60-GA
WHT-BLK 90
BLK-RED 146
840O640O330
67
52
730
1
0.85 (Room A)
0.85 (Room B+C)
MC1 : 620 (NEO22), MC2 : 350 (NEO22)
Triple
A+B+C
3.4+1.45O2
1.4+0.4
8.84
1,980
97.4
8.01
3.01
9
Outdoor model
Function
Capacity
Dehumidification
Outdoor air flow
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding
resistance (at 20:)
Model
Winding
resistance (at 20:)
Dimensions WOHOD
Weight
Sound level
Fan speed
Fan speed regulator
Refrigerant filling
capacity (R410A)
Refrigeration oil (Model)
kW
R/h
K /h
A
A
W
A(kW)
%
A
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
Compressor
Electrical
data
Fan
motor
Special
remarks
Capacity
Coefficient of performance (C.O.P)
Outdoor unit power supply
Indoor unit No.
MUX-2A70VB
Cooling
Single phase 230V,50Hz
2,460
20
—
54
0.57
MC1 : RN145VHSHT, MC2 : RN145VHSHT
MC1 : 1,000, MC2 : 1,000
RA6V60-GA
WHT-BLK 90
BLK-RED 146
840O640O330
68
52
730
1
0.95 (Room A)
0.95 (Room B)
MC1 : 620 (NEO22), MC2 : 620 (NEO22)
Single
A or B
3.5
1.4
5.88
1,300
96.1
5.31
2.61
Double
A+B
3.5O2
1.4O2
11.49
2,540
96.1
10.92
2.67
C-R 2.43
C-S 3.80
MC1 : , MC2 :
C-R 2.43
C-S 3.80
NOTE: As for specification of the indoor units, refer to indoor unit service manual.
NOTE: Test conditions are based on ISO 5151.
Cooling : Indoor DB27°C WB19°C
Indoor-Outdoor piping length : 5m
Outdoor DB35°C WB24°C
10
NOTE: As for specification of the indoor units, refer to indoor unit service manual.
Outdoor model
Function
Outdoor unit power supply
kW
A
A
W
%
A
A
A
Single
A or B
3.4
1.2
5.28
1,180
97.2
4.75
2.79
Indoor unit No.
Capacity
Dehumidification
Outdoor air flow
Capacity
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Electrical
data
Starting current
Compressor motor current
Fan motor current
Coefficient of performance (C.O.P)
R/h
K /h
A(kW)
Model
Output
Winding
Compressor
resistance (at 20:)
W
"
Model
Winding
Fan
motor
resistance (at 20:)
Dimensions WOHOD
Weight
Sound level
Fan speed
"
mm
kg
dB
rpm
Fan speed regulator
Refrigerant filling
Special
remarks
capacity (R410A)
Refrigeration oil (Model)
kg
cc
NOTE: Test conditions are based on ISO 5151.
Cooling : Indoor DB27°C WB19°C
Outdoor DB35°C WB24°C
Indoor-Outdoor piping length : 5m
Single
C or D
2.75
1.1
4.54
1,015
97.2
4.01
2.62
MUX-4A73VB
Cooling
Single phase 230V,50Hz
Double
A+B
1.95O2
0.2O2
Double
A+C or A+D
or
B+C or B+D
3.4+2.7
1.2+1.1
Double
C+D
1.7O2
0.3O2
Triple
A+B+C
or
A+B+D
1.95O2+2.8
0.2O2+1.1
2,760
20
5.46
1,210
9.57
2,095
4.78
1,060
9.61
2,105
—
96.4
95.2
96.4
95.2
52
4.93
9.04
4.25
9.08
0.53
3.02
2.81
3.01
3.02
MC1 : RN145VHSHT, MC2 : RN125VHSHT
MC1 : 1,000, MC2 : 800
C-R 2.43
MC1 : , MC2 :
C-S 3.80
C-R 2.86
C-S 5.72
RA6V60-FA
WHT-BLK 79
BLK-RED 80
840O850O330
76
52
730
1
1.05 (Room A+B)
1.05 (Room C+D)
MC1 : 620 (NEO22), MC2 : 350 (NEO22)
Triple
A+C+D
or
B+C+D
3.4+1.7O2
1.2+0.3O2
9.66
2,140
96.3
9.13
3.02
Four
A+B+C+D
1.95O2+1.7O2
0.2O2+0.3O2
9.75
2,210
98.6
9.22
3.09
11
NOISE CRITERIA CURVES5
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions.
Cooling : DB27: WB19:
MUX-2A28VB
COOL
FUNCTION
49
SPL(dB(A)) LINE
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions.
Cooling :DB35: WB24:
COOL
FUNCTION
52
SPL(dB(A)) LINE
MUX-2A59VB
MUX-3A60VB
MUX-3A63VB
MUX-2A70VB
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions.
Cooling :DB35: WB24:
COOL
FUNCTION
52
SPL(dB(A)) LINE
MUX-4A73VB
12
6
320
25
10
-
126
76
120
56
260
10
780
500
122
40
540
320
285
255
Service panel
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) [9.52
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) [6.35
Air out
Air in
Air in
176
226
109
32
110
147
Drainage
3holes [33
100mm or more
100m
m
or m
ore
100mm or more
350mm or more
REQUIRED SPACE
400m
m
or m
ore
500
840 61
264
10
°
10
°
Service panel
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
Open as a rule
500mm or more if the back,
both sides and top are open
350mm or more
100mm or more
B UNIT
A UNIT
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) {9.52
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) {9.52
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) {6.35
65
80
121
40
438
Air in
Air out
Air in
273
100
125
320
30
330
640
360
76
505050
Drainage
3holes {33
}
}
34
OUTLINES AND DIMENSIONS
MUX-2A28VB
Unit: mm
MUX-2A59VB
13
MUX-3A60VB
500
840 61
264
10
°
10
°
Service panel
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
on both sides
Open as a rule
500mm or more if the back,
both sides and top are open
350mm or more
100mm or more
B UNIT
A UNIT
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) {9.52
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) {6.35
65
121
40
438
Air in
Air out
Air in
273
100
125
320
30
330
640
360
76
5050505050
Drainage
3 holes {33
}
C UNIT
}
}
34
500
840 61
264
10
°
10
°
Service panel
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
on both sides
Open as a rule
500mm or more if the back,
both sides and top are open
350mm or more
100mm or more
B UNIT
A UNIT
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) {9.52
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) {6.35
80
121
40
438
Air in
Air out
Air in
273
100
125
320
30
330
640
360
76
505050
Drainage
3 holes {33
}
}
34
MUX-3A63VB
Unit: mm
MUX-2A70VB
14
MUX-4A73VB
Drainage
3 holes
{33
330
850
125
Air in
430
100
273
438
Air in
Air out
121
Open as a rule
Unit: mm
500mm or more if
the front and both
sides are open
40
34
30
100mm or more
100mm or more
200mm or more if
there are obstacles
on both sides
360
500
840
Open as a rule
65
500mm or more if the back,
61
both sides and top are open
350mm or more
Service panel
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) {6.35
D Unit
C Unit
B Unit
A Unit
50
50
5050
50
50
50
10
°
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) {9.52
10
°
76
80
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) {9.52
260
15
7
PE
BLU
BRN
F62
DSAR
CIRCUIT BREAKER
WHT
1
2
TB3
1
BLK
RED
C2
2
1
4
3
X1
X1
X2
X2
4
3
BLU
BRN BRN BRN
F61
BRN
BRN
WHT
WHT
WHT
WHT
BRN
52C
NO
52C
COM
3
1
RED
BLU
RED
BLK
21R
TB2
MF
WHT
2
WHT
5
5
6
6
R
S
MC
C
X2
N
L
POWER SUPPLY
~ / N
230V
50Hz
TB1
BLK
8
8
7
7
WHT
ORN
YLW
TO INDOOR
UNIT No.A
CONNECTING
12V
X1
1
2
1
1
2
2
TO INDOOR
UNIT No.B
CONNECTING
12V
2
TB3
C1
BLU
BLU
BLU
1
2
BLU
BLU
BLU
1
2
BLU
BLU
BLU
BLU
BLU
1
2
21R2
21R1
BLU
BLU
BLU
SYMBOL
21R1
21R2
52C
SYMBOL
MF
TB1,TB2,TB3
X1
X2
21R
SYMBOL
C1
C2
DSAR
F61,F62
MC
NAME
NAME NAME
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(2A)
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER FUSE)
TERMINAL BLOCK
RELAY(A)
RELAY(B)
SOLENOID COIL
SOLENOID COIL(A)
SOLENOID COIL(B)
COMPRESSOR CONTACTOR
WIRING DIAGRAM
MUX-2A28VB
NOTE: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
16
MUX-2A59VB
MUX-2A70VB
POWER SUPPLY
~/N
L
TB1
230V
50Hz
N
BRN
PE
CIRCUIT BREAKER
GRN/YLW
TO INDOOR
UNIT A
CONNECTING
1
2
TB2
BLU
YLW
12V
TO INDOOR
1
BLU
UNIT B
CONNECTING
2
ORN
12V
SYMBOL
C1
C2
C61
DSAR
F61
NOTE:1. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.
COMPRESSOR CAPACITOR(MC1)
COMPRESSOR CAPACITOR(MC2)
OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(3.15A)
2. Use copper conductors only. (For field wiring)
3. Symbols below indicate.
/: Terminal block, : Connector
NAME
BRN
BLU
TB4
2
1
DSAR
3
2
1
3
2
1
SYMBOL
BLU
CN71
CN73
CN91
MC1
MC2
MF61
NR61
SR861
BRN
123
CN90
OUTDOOR CONTROL
P.C. BOARD
F61
NR61
T61
SR861
52341
6
BLK
WHT
RED
MF61
COMPRESSOR(INNER PROTECTOR)
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR (INNER PROTECTOR)
SURGE ABSORBER
OUTDOOR FAN RELAY
LD1
LD2
RED
RED
C61
NAME NAME
BRN
X522
BRN
X521
3
4
X521X522
SYMBOL
TB1
TB2~TB4
T61
X521
X522
C1
BLU
RED
S
MC1
BLU
BLK
R
C
WHT
3
4
C2
RED
S
MC2
RC
BLK
WHT
TERMINAL BLOCK
TERMINAL BLOCK
TRANSFORMER
COMPRESSOR CONTACTOR(MC1)
COMPRESSOR CONTACTOR(MC2)
17
1
2
3
1
2
3
123
213
123123123
21R421R3
NR61
T61
1
2
43
43
C61
LD1
WHT
WHT
OUTDOOR CONTROL P.C. BOARD
BRN
BLU
BRN
BLU
BRN
BLU
BLU
X522
X521
BLK
SR865
SR866
SR863
SR861
LD2
RED
RED
RED
BLK
WHT
652341
BRN
BLU
BLU
TB4
CN86
CN85
CN81
CN91
CN90
TB3
TB2
X521
BLU
BLU
X522
BLU
BLU
21RB
F61
CN74
CN73
CN71
TO INDOOR
UNIT B
CONNECTING
12V
PE
CIRCUIT BREAKER
GRN/YLW
WHT
BLU
ORN
BLU
YLW
BLU
RED
RED
TO INDOOR
UNIT A
CONNECTING
12V
2
1
2
1
C2
C1
RC
S
CR
S
MC2
TO INDOOR
UNIT C
CONNECTING
12V
MF61
MC1
BLK
TB1
POWER SUPPLY
~/N
230V
50Hz
2
1
L
N
DSAR
BRN
SYMBOL
MF61
NR61
SR861
SR863
SR865
SR866
TB1
SYMBOL
C1
C2
C61
DSAR
F61
MC1
MC2
NAME
NAME NAME
COMPRESSOR CAPACITOR(MC1)
COMPRESSOR CAPACITOR(MC2)
OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(3.15A)
COMPRESSOR(INNER PROTECTOR)
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER PROTECTOR)
SURGE ABSORBER
OUTDOOR FAN RELAY
RELAY (21RB)
RELAY (C) (21R4)
RELAY (B) (21R3)
TERMINAL BLOCK
TERMINAL BLOCK
TRANSFORMER
COMPRESSOR CONTACTOR(MC1)
COMPRESSOR CONTACTOR(MC2)
SOLENOID COIL
SOLENOID COIL (B)
SOLENOID COIL (C)
SYMBOL
TB2~TB4
T61
X521
X522
21RB
21R3
21R4
MUX-3A60VB
18
2. Use copper conductors only. (For field wiring)
/: Terminal block, : Connector
3. Symbols below indicate.
NOTE:1. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.
MUX-3A63VB
CR
RED
C1
BLU
S
MC1
WHT
BLK
RED
C2
S
MC2
RC
WHT
BLK
BLU
123123123
CN85
LD1
LD2
BLU
BLU
BLU
BLU
BLU
BLU
RED
RED
21R421R3
21RB
C61
TERMINAL BLOCK
TRANSFORMER
T61
SYMBOL
TB2~TB4
NAME NAME
COMPRESSOR CONTACTOR(MC1)
COMPRESSOR CONTACTOR(MC2)
SOLENOID COIL
X521
X522
21RB
SOLENOID COIL (B)
21R3
SOLENOID COIL (C)
21R4
BRN
BRN
X521
43
X522
SR865
CN86
X521
43
SR866
X522
SR863
CN81
T61
TB4
BRN
TB1
L
POWER SUPPLY
OUTDOOR CONTROL P.C. BOARD
NR61
CN90
BRN
123
F61
SR861
BLU
3
BLU
1
CN73
2
ORN
2
2
1
3
BLU
WHT
TB3
2
1
CN71
BLU
TB2
1
213
YLW
2
1
2
DSAR
BLU
BRN
GRN/YLW
PE
N
652341
CN74
CN91
1
RED
BLK
WHT
MF61
OUTDOOR FAN MOTOR(INNER PROTECTOR)
SURGE ABSORBER
OUTDOOR FAN RELAY
MF61
NR61
SYMBOL
SR861
NAME
COMPRESSOR CAPACITOR(MC1)
COMPRESSOR CAPACITOR(MC2)
OUTDOOR FAN CAPACITOR
C1
C2
C61
SYMBOL
RELAY (21RB)
RELAY (C) (21R4)
RELAY (B) (21R3)
TERMINAL BLOCK
SR863
SURGE ABSORBER
TB1
SR865
SR866
FUSE(3.15A)
COMPRESSOR(INNER PROTECTOR)
COMPRESSOR(INNER PROTECTOR)
2. Use copper conductors only. (For field wiring)
F61
MC1
DSAR
MC2
NOTE:1. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.
/: Terminal block, : Connector
3. Symbols below indicate.
CIRCUIT BREAKER
~/N
230V
50Hz
TO INDOOR
UNIT A
TO INDOOR
UNIT B
CONNECTING
CONNECTING
12V
12V
TO INDOOR
UNIT C
CONNECTING
12V
19
DSAR
CIRCUIT BREAKER
L
N
1
2
1
221
2
1
BLK
RED
MF61
21R1
BLU
BLU
RED
RED
OUTDOOR CONTROL P.C. BOARD
T61
34
43
X521
X522
MC1
S
RC
MC2
S
RC
C1
C2
BLK
RED
WHT
RED
BLK
WHT
X522 X521
13
3
1
3
113
1
3
621
CONNECTING
TO INDOOR
POWER SUPPLY
WHT
BLU
ORN
BLU
BRN
BLU
YLW
CN74CN73CN72CN71
TB1
TB3
TB2
2
2
2
2
2
BRN
BLU
TB4
2
1
BLU
F61
BRN
BLU
SR861
CN91
435
SR868
BLU
BLU
BRN
BRN
LD1
LD2
C61
NR61
CN90
WHT
123 123
21R2
BLU
BLU
SR867
21R3
BLU
BLU
SR866
123
BLU
BLU
21R4
123
SR865
BLU
BLU
21RA
123
SR864
BLU
BLU
21RB
123
SR863
CN83 CN84 CN85 CN86 CN81CN82
~/N
12V
230V
50Hz
UNIT C
TO INDOOR
CONNECTING
12V
UNIT A
PE
GRN/YLW
TO INDOOR
CONNECTING
UNIT D
12V
CONNECTING
TO INDOOR
12V
UNIT B
BRN
SYMBOL
SR861
SR863
SR864
SR865
SR866
SR867
SR868
TB1~TB4
T61
SYMBOL
C1
C2
C61
DSAR
F61
MC1
MC2
MF61
NR61
NAME
NAME NAME
COMPRESSOR CAPACITOR(MC1)
COMPRESSOR CAPACITOR(MC2)
OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(3.15A)
COMPRESSOR(INNER PROTECTOR)
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER PROTECTOR)
SURGE ABSORBER
OUTDOOR FAN RELAY
RELAY (21RB)
RELAY (21RA)
RELAY (D) (21R4)
RELAY (C) (21R3)
RELAY (B) (21R2)
RELAY (A) (21R1)
TERMINAL BLOCK
TRANSFORMER
COMPRESSOR CONTACTOR(MC1)
COMPRESSOR CONTACTOR(MC2)
SOLENOID COIL (BALANCE)
SOLENOID COIL (BALANCE)
SOLENOID COIL (A)
SOLENOID COIL (B)
SOLENOID COIL (C)
SOLENOID COIL (D)
SYMBOL
X521
X522
21RA
21RB
21R1
21R2
21R3
21R4
MUX-4A73VB
2. Use copper conductors only. (For field wiring)
/: Terminal block, : Connector
3. Symbols below indicate.
NOTE:1. About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.
20
8
Indoor unit A
Outdoor unit
MUX-2A28VB
Additional piping max. length 15m
Max. length
difference
10m
Indoor unit B
UNIT A
Indoor
heat
exchanger
Indoor coil
thermistor
RT12
Room
temperature
thermistor
RT11
UNIT B
Indoor
heat
exchanger
Outdoor
heat
exchanger
Indoor coil
thermistor
RT12
Room
temperature
thermistor
RT11
(With insulation)
Refrigerant pipe
[9.52
(With insulation)
Refrigerant pipe
[9.52
Flared connection
(With insulation)
Refrigerant pipe
[6.35
(With insulation)
Refrigerant pipe
[6.35
Flared connection
Stop valve
with service port
Solenoid valve
21R1
Solenoid
valve
21R
Solenoid valve
21R2
Capillary tube
Capillary tube
Capillary tube
Capillary tube
[3.0 x [1.4 x 1000
Compressor
Strainer
#100
Muffler
Refrigerant flow in cooling
Stop valve
with service port
Stop
valve
Stop
valve
[3.0 x [1.6 x 900
[3.0 x [1.4 x 400
[3.0 x [1.4 x 400
Strainer
#100
OUTDOOR UNIT
INDOOR UNIT
REFRIGERANT SYSTEM DIAGRAM
Unit : mm
MUX-2A28VB
MAX. REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE
ADDITIONAL REFRIGERANT CHARGE (R410A:g)
UNIT No.
PIPING PREPARATION
1 Table below shows the specifications of pipes commercially available.
BA
unit + unit
UNIT No. Pipe
BA
and
UNIT
2 Ensure that the 2 refrigerant pipes are well insulated to prevent condensation.
3 Refrigerant bending radius must be 10cm or more.
Outdoor unit
precharged
900g
For liquid 6.35 8 mm Heat resisting foam plastic
For gas 9.52 8 mm 0.045 specific gravity
10m11m12m13m14m15m16m17m18m19m20m21m22m23m24m25m26m27m28m29m30
0 102030405060
Outside diameter Insulation
Refrigerant piping length (one way)
70 80 90 100 110 120 130 140 150 160 170 180 190 200
mm thickness
21
m
Insulation material
OUTDOOR UNIT
INDOOR UNIT
UNIT A
Indoor
heat
exchanger
Indoor coil
thermistor
RT12
Room
temperature
thermistor
RT11
UNIT B
Indoor
heat
exchanger
Outdoor
heat
exchanger
Indoor coil
thermistor
RT12
Room
temperature
thermistor
RT11
Flared connection
Flared connection
Stop valve
with service port
Stop valve
Stop valve
with
service port
Capillary tube
Capillary tube
Muffler
Muffler
Strainer
#100
Compressor(A)
Compressor(B)
Refrigerant flow in cooling
Stop valve
[3.0 x [1.4 x 850
[3.0 x [1.4 x 1100
(With insulation)
Refrigerant pipe
[6.35
(With insulation)
Refrigerant pipe
[6.35
(With insulation)
Refrigerant pipe
[9.52
(With insulation)
Refrigerant pipe
[9.52
Strainer
#100
Unit : mm
MUX-2A59VB
22
MAX.REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE
Max.
limits
UNIT No.
A
B
Indoor unit A
Outdoor unit
MUX-2A59VB
A
L
LB
LA
Pipe length
15m
15m
Indoor unit B
HL
B H
Height difference (H)
10m
10m
No. of bends
10
10
ADDITIONAL REFRIGERANT CHARGE (R410A:g)
Outdoor unit
A
unit
B
unit
precharged
1000g
Outdoor unit
precharged
800g
7m
0
7m
8m
20
8m
0
20
Refrigerant piping length (one way)
9m
40
Refrigerant piping length (one way,2 unit total)
9m
40
10m6011m8012m
PIPING PREPARATION
1Table below shows the specifications of pipes commercially available.
UNIT No.
A
unit
B
unit
2Ensure that the 2 refrigerant pipes are well insulated to prevent condensation.
3Refrigerant bending radius must be 10cm or more.
Pipe
For liquid
For gas
For liquid
For gas
Outside diameter
mm
6.35
9.52
6.35
9.52
100
10m6011m8012m
100
Insulation
thickness
8mm
8mm
8mm
8mm
Heat resisting foam plastic
0.045 specific gravity
13m
120
13m
120
Insulation material
14m
140
14m
140
15m
160
15m
160
23
Unit : mm
OUTDOOR UNIT
INDOOR UNIT
UNIT A
Indoor
heat
exchanger
Indoor coil
thermistor
RT12
Room
temperature
thermistor
RT11
UNIT B
Indoor
heat
exchanger
Outdoor
heat
exchanger
Indoor coil
thermistor
RT12
Room
temperature
thermistor
RT11
Flared connection
Flared connection
Flared connection
Stop valve
with service port
Stop valve
Solenoid valve
21R3
Solenoid valve
21R4
Solenoid
valve
21RB
Stop valve
with
service port
Stop valve
with
service port
Capillary tube
Capillary tube
Capillary tube
Capillary tube
Capillary tube
Compressor(A)
Compressor(B,C)
Refrigerant flow in cooling
UNIT C
Indoor
heat
exchanger
Indoor coil
thermistor
RT12
Room
temperature
thermistor
RT11
Stop
valve
Stop
valve
Strainer
#100
Muffler
Muffler
[3.0 x [1.4 x 950
[3.0 x [1.4 x 1000
[3.0 x [1.6 x 900
[3.0 x [1.6 x 900
[3.0 x [1.6 x 900
(With insulation)
Refrigerant pipe
[6.35
(With insulation)
Refrigerant pipe
[9.52
(With insulation)
Refrigerant pipe
[6.35
(With insulation)
Refrigerant pipe
[6.35
(With insulation)
Refrigerant pipe
[9.52
Refrigerant pipe
[9.52
(With insulation)
Strainer
#100
Strainer
#100
MUX-3A60VB
24
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