Mitsubishi Electronics MXZ-2A20NA, MXZ-3A30NA User Manual
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
33223
9700058
OUTDOOR UNIT
Revision B:
• MXZ-2A20NA - and MXZ-3A30NA have been added.
Please void OB444 REVISED EDITION-A.
11
SERVICE MANUAL
Inverter-controlled multi system type
Models
MXZ-2A20NA
MXZ-2A20NA -
1
MXZ-3A30NA
MXZ-3A30NA -
1
CONTENTS
HFC
utilized
R410A
Indoor unit service manual
MSZ-A·NA Series (OB450)
No. OB444
REVISED EDITION-B
MXZ-2A20NA
MXZ-2A20NA -
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.
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················6
3. INDOOR UNITS COMBINATION ·······················7
4. SPECIFICATION···············································10
5. OUTLINES AND DIMENSIONS·······················12
6. WIRING DIAGRAM ··········································15
7. REFRIGERANT SYSTEM DIAGRAM··············19
8. DATA·································································23
9. ACTUA TOR CONTROL····································38
10. SERVICE FUNCTIONS·····································38
11. TROUBLESHOOTING ······································40
12. DISASSEMBLY INSTRUCTIONS·····················57
13. PARTS LIST······················································66
1
14. RoHS PARTS LIST···········································74
15. OPTIONAL PARTS ···········································86
The Slim Line.
From Mitsubishi Electric.
TM
Revision A:
• RoHS PARTS LIST has been added.
Revision B:
• MXZ-2A20NA - and MXZ-3A30NA - have been added.
1
TECHNICAL CHANGES
11
MXZ-2A20NA
New model
MXZ-30TN2 ➔ MXZ-3A30NA
1. Combinations of connectable indoor units have been increased.
2. Capacity class of connectable indoor units have been made larger.
3. Compressor has been changed. (THV247FBA ➔ TNB220FMCH)
4. Outdoor fan motor has been changed. (RA6N60-AA ➔ RC0J60-AB)
5. Refrigerant has been changed. (R22 ➔ R410A)
6. Refrigerant system diagram has been changed.
• 1 of 2 high pressure switch has been removed.
• Accumulator has been removed.
• Receiver has been added.
7. Communication system has been changed.
8. Power supply way has been changed(change to supply to outdoor unit).
9. Evaporation temperature thermistor has been added.
10. Ambient temperature thermistor has been added.
MXZ-2A20NA ➔ MXZ-2A20NA -
1. Compressor has been changed. (SNB130FPDH1 ➔ SNB130FQBH1)
2. Gas pipe temperature thermistor has been removed.
3. Pre-heat control has been added.
4. Electronic control P.C. board has been changed.
5. Power board has been changed.
MXZ-3A30NA ➔ MXZ-3A30NA -
1. Ball valve has been changed to stop valve.
2. Gas pipe temperature thermistor has been removed.
3. Pre-heat control has been added.
4. Auto line correcting function has been added.
5. Noise filter P.C. board has been changed.
6. Electronic control P.C. board has been changed.
7. Weight has been changed. (158lb. ➔ 148lb.)
1
1
2
INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT
Refrigeration
oil
Refrigerant
New refrigerant
R410A
HFC-32: HFC-125 (50%:50%)
Pseudo-azeotropic refrigerant
Not included
A1/A1
72.6
-60.5
225.82
3.995
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
-41.4
136.34
2.772
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 (-F)
Steam pressure [77-F](PSIG)
Saturated steam density [77-F](lb/ft
3
)
Combustibility
ODP w1
GWP w2
Refrigerant charge method
Additional charge on leakage
Kind
Color
Smell
w1:Ozone Depletion Potential : based on CFC-11
w2 :Global Warming Potential : based on CO
2
• 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 air
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.
3
R410A tools
Can R22 tools be used?
Gas leak detector
R410A has high pressures beyond the measurement range of existing
gauges.
Hose material have been changed to improve the pressure resistance.
Dedicated for HFC refrigerant.
1/4in. and 3/8in.
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
No 1/2in. and 5/8in.
1.Tools dedicated 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,
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
-22 -4 14 32 50 68
86
104 122 140
-73
0
73
145
218
290
363
435
508
580
(PSIG)
R410A
R22
Conversion chart of refrigerant temperature and pressure
Saturated liquid pressure
(-F)
The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools.
4
2.Refrigerant piping
Wall thickness
(inch)
Outside diameter
(inch)
1/4
3/8
1/2
5/8
0.0315
0.0315
0.0315
0.0394
Heat resisting foam plastic
Specific gravity 0.045 Thickness 0.315 inch
Insulation material
Electronic scale for refrigerant charging
Outdoor unit
Refrigerant gas
cylinder
operating valve
Refrigerant gas cylinder
for R410A with siphon
Refrigerant (liquid)
Service port
Gauge manifold
valve (for R410A)
Union
Liquid pipe
Gas pipe
Stop valve
Indoor unit
Charge hose (for R410A)
1 Specifications
Use the copper or copper-alloy seamless pipes for refrigerant that meet the following specifications.
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
(inch)
1/4
3/8
1/2
5/8
17 [11/16]
26 [1-1/32]
29 [1-5/32]
Dimension of flare nut
(inch) [inch]
R410A
22 [7/8]
R22
17 [11/16]
22 [7/8]
24 [15/16]
27 [1-1/16]
3.Refrigeration 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.
5
2
Air inlet
Drain outlet
(Back and side)
Air outlet
Air inlet
Drain outlet
(Back and side)
Air outlet
PART NAMES AND FUNCTIONS
MXZ-2A20NA MXZ-2A20NA -
MXZ-3A30NA
1
MXZ-3A30NA -
1
Air inlet
(Back and side)
Air outlet
Drain outlet
6
3
1
09
12
15
09+09
09+12
09+15
12+12
95
95
95
97
97
97
97
3.34
4.53
7.05
7.80
9.64
9.64
9.64
3.69
5.01
7.79
8.62
10.66
10.66
10.66
–
–
–
9,000
11,500
12,500
10,000
9,000
(5,400 ~ 9,000)
12,000
(5,400 ~ 12,000)
15,000
(5,400 ~ 15,000)
18,000
(7,800 ~ 18,000)
20,000
(7,800 ~ 20,000)
20,000
(7,800 ~ 20,000)
20,000
(7,800 ~ 20,000)
730
(490 ~ 730)
990
( 490 ~ 990)
1,540
(490 ~ 1,540)
1,740
(630 ~ 1,740)
2,150
(630 ~ 2,150)
2,150
(630 ~ 2,150)
2,150
(630 ~ 2,150)
9,000
12,000
15,000
9,000
8,500
7,500
10,000
Indoor units
combination
Unit A Unit B
Cooling capacity (BTU/h)
Total
Power consumption
(W)
Current
(A)
Power
factor
(%)
208V 230V
MXZ-2A20NA MXZ-2A20NA -
09
12
15
09+09
09+12
09+15
12+12
95
95
95
97
97
97
97
4.30
5.40
7.87
8.16
7.98
7.98
7.98
4.76
5.97
8.70
9.02
8.82
8.82
8.82
–
–
–
10,900
12,500
13,750
11,000
10,900
(5,200 ~ 15,400)
13,600
(5,200 ~ 16,400)
18,000
(5,200 ~ 21,100)
21,800
(8,500 ~ 21,800)
22,000
(8,500 ~ 22,000)
22,000
(8,500 ~ 22,000)
22,000
(8,500 ~ 22,000)
940
(480 ~ 1,430)
1,180
(480 ~1,460)
1,720
(480 ~ 2,100)
1,820
(520 ~ 1,820)
1,780
(520 ~ 1,780)
1,780
(520 ~ 1,780)
1,780
(520 ~ 1,780)
10,900
13,600
18,000
10,900
9,500
8,250
11,000
Indoor units
combination
Heating capacity (BTU/h)
Total
Power consumption
(W)
Current
(A)
Power
factor
(%)
208V 230V
Unit A Unit B
INDOOR UNITS COMBINATION
7
1
09
12
15
17
24
09+09
09+12
09+15
09+17
09+24
12+12
12+15
12+17
15+15
15+17
17+17
09+09+09
09+09+12
09+09+15
09+09+17
95
95
95
95
95
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
3.66
4.58
6.04
6.77
10.07
8.07
8.96
11.21
12.10
14.34
11.21
12.55
12.55
12.55
12.55
12.55
12.82
14.57
14.57
14.57
4.05
5.06
6.68
7.49
11.13
8.92
9.91
12.39
13.38
15.86
12.39
13.88
13.88
13.88
13.88
13.88
14.18
16.11
16.11
16.11
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
9,000
11,400
12,900
13,800
9,000
(7,200 ~ 9,000)
12,000
(7,200 ~ 12,000)
15,000
(7,200 ~ 15,000)
16,200
(7,200 ~ 16,200)
22,000
(7,200 ~ 22,000)
18,000
(12,000 ~ 18,000)
21,000
(12,000 ~ 21,000)
24,000
(12,000 ~ 24,000)
25,200
(12,000 ~ 25,200)
28,000
(12,000 ~ 28,000)
24,000
(12,000 ~ 24,000)
26,000
(12,000 ~ 26,000)
26,000
(12,000 ~ 26,000)
26,000
(12,000 ~ 26,000)
26,000
(12,000 ~ 26,000)
26,000
(12,000 ~ 26,000)
27,000
(12,600 ~ 27,000)
28,400
(12,600 ~ 28,400)
28,400
(12,600 ~ 28,400)
28,400
(12,600 ~ 28,400)
–
–
–
–
–
9,000
12,000
15,000
16,200
20,400
12,000
14,500
15,200
13,000
13,800
13,000
9,000
8,500
7,750
7,300
9,000
12,000
15,000
16,200
22,000
9,000
9,000
9,000
9,000
7,600
12,000
11,500
10,800
13,000
12,200
13,000
9,000
8,500
7,750
7,300
Indoor units
combination
Unit A Unit B Unit C
Cooling capacity (BTU/h)
Total
Power consumption
(W)
Current
(A)
Power
factor
(%)
208V 230V
MXZ-3A30NA MXZ-3A30NA -
800
(650 ~ 800)
1,000
(650 ~ 1,000)
1,320
(650 ~ 1,320)
1,480
(650 ~ 1,480)
2,220
(650 ~ 2,200)
1,800
(920 ~ 1,800)
2,000
(920 ~ 2,000)
2,500
(920 ~ 2,500)
2,700
(920 ~ 2,700)
3,200
(920 ~ 3,200)
2,500
(920 ~ 2,500)
2,800
(920 ~ 2,800)
2,800
(920 ~ 2,800)
2,800
(920 ~ 2,800)
2,800
(920 ~ 2,800)
2,800
(920 ~ 2,800)
2,860
(1,000 ~ 2,850)
3,250
(1,000 ~ 3,250)
3,250
(1,000 ~ 3,250)
3,250
(1,000 ~ 3,250)
8
Indoor units
combination
09
12
15
17
24
09+09
09+12
09+15
09+17
09+24
12+12
12+15
12+17
15+15
15+17
17+17
09+09+09
09+09+12
09+09+15
09+09+17
Heating capacity (BTU/h)
Unit A Unit B Unit C
10,900
13,600
18,000
20,100
23,200
10,900
10,900
10,100
9,300
7,300
13,500
12,000
11,200
13,500
12,700
13,500
9,500
8,600
7,800
7,350
–
–
–
–
–
10,900
13,600
16,900
17,700
19,700
13,500
15,000
15,800
13,500
14,300
13,500
9,500
8,600
7,800
7,350
9,500
11,400
13,000
13,900
Power consumption
Total
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
10,900
(8,600 ~ 15,400)
13,600
(8,600 ~ 16,400)
18,000
(8,600 ~ 21,100)
20,100
(8,600 ~ 21,500)
23,200
(8,600 ~ 27,800)
21,800
(11,000 ~ 31,000)
24,500
(11,000 ~ 33,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
28,500
(11,400 ~ 36,000)
28,600
(11,400 ~ 36,000)
28,600
(11,400 ~ 36,000)
28,600
(11,400 ~ 36,000)
(W)
1,100
(780 ~1,520)
1,380
(780 ~ 1,600)
1,940
(780 ~ 2,280)
2,240
(780 ~ 2,300)
2,520
(780 ~ 3,000)
1,700
(740 ~2,560)
1,980
(740 ~ 2,800)
2,200
(740 ~ 2,920)
2,200
(740 ~ 2,920)
1,980
(740 ~ 2,740)
2,200
(740 ~ 2,920)
2,160
(740 ~ 2,860)
2,140
(740 ~ 2,860)
2,120
(740 ~ 2,800)
2,110
(740 ~ 2,800)
2,100
(740 ~ 2,800)
2,180
(740 ~ 2,880)
2,180
(740 ~ 2,880)
2,180
(740 ~ 2,880)
2,180
(740 ~ 2,880)
Current
(A)
208V 230V
5.57
6.98
9.82
11.34
12.75
8.43
9.81
10.90
10.90
9.81
10.90
10.71
10.61
10.51
10.46
10.41
10.80
10.80
10.80
10.80
5.03
6.32
8.88
10.25
11.53
7.62
8.87
9.86
9.86
8.87
9.86
9.68
9.59
9.50
9.46
9.41
9.77
9.77
9.77
9.77
Power
factor
(%)
95
95
95
95
95
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
9
4
1
1
1
Item Model
Capacity
Power
consumption
EER [SEER]
HSPF IV (V)
COP
External finish
Power supply
Max. fuse size (time delay)
Min. circuit ampacity
Fan motor
Compressor
Refrigerant control
Sound level
Defrost method
Dimensions
Weight
Remote controller
Control voltage (by built-in transformer)
Refrigerant piping
Valve size
Connection method
Refrigerant charge (R410A)
Refrigeration oil (Model)
Model
Winding resistance (at 68˚F) "
W
D
H
Liquid
Gas
Indoor
Outdoor
Btu/h
Btu/h
Btu/h
W
W
W
V, phase, Hz
A
A
F.L.A
R.L.A
L.R.A
dB(A)
in.
in.
in.
lb.
in.
in.
lb.
oz.
20,000/ (7,800 ~ 20,000)
22,000/ (8,500 ~ 22,000)
14,500
2,150/ (630 ~ 2,150)
1,780/ (520 ~ 1,780)
1,500 (1,500)
9.3 [15
]
9.0 (7.0)
12.4
Munsell 5Y 8/1
208/230, 1, 60
20
15
0.96
U-V 0.45 V-W 0.45 W-U 0.45
U-V 0.98 V-W 0.98 W-U 0.98
10.1
15
LEV
49/51
Reverse cycle
33-1/16
13
27-15/16
130
Wireless type
12-24V DC
Not supplied (optional parts)
1/4
A,B:3/8
Flared
Flared
5lb. 15oz.
❈1 ❈3
❈1
❈1
❈2
❈1
❈1
❈2
Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17
Cooling
Heating
Heating
MXZ-2A20NA MXZ-2A20NA -
SNB130FPDH1
SNB130FQBH1
20.3 (NEO22)
23.7 (NEO22)
MXZ-2A20NA
MXZ-2A20NA -
MXZ-2A20NA
MXZ-2A20NA -
1
MXZ-2A20NA
MXZ-2A20NA -
Cooling
Heating
Mode
❈1: "A" Cooling Steady State at rated compressor Speed
❈3: "B-2" Cooling Steady State at rated compressor Speed
"B-1" Cooling Steady State at minimum compressor Speed
Low ambient Cooling Steady State at minimum compressor Speed
Intermediate Cooling Steady State At Intermediate compressor Speed
w
❈1: Standard Rating-Heating at rated compressor Speed
❈2: Low temperature Heating at rated compressor Speed
Max. temperature Heating at minimum compressor Speed
High temperature Heating at minimum compressor Speed
Frost Accumulation at rated compressor Speed
Frost Accumulation at Intermediate compressor Speed
w
Test
Indoor air condition Outdoor air condition
Dry bulb
Wet bulb
Dry bulb
Wet bulb
80
80
80
80
80
70
70
70
70
70
70
67
67
67
67
67
60
60
60
60
60
60
95
82
82
67
87
47
17
62
47
35
35
(75)
(65)
(65)
(53.5)
(69)
43
15
56.5
43
33
33
w
At Intermediate compressor Speed
=("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
Unit: ˚F
SPECIFICATION
NOTE : Test conditions are based on ARI 210/240.
❈1 : Rating conditions(cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB)
❈2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB
❈3 : (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 82˚FDB, 65˚FWB
(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB
10
Item Model
❈1
❈1
❈1
❈2
❈1
❈2
Btu/h
Btu/h
Btu/h
W
W
W
Capacity
Power
consumption
❈1 ❈3
EER [SEER]
HSPF IV (V)
COP
Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17
Cooling
Heating
Heating
External finish
Power supply
Max. fuse size (time delay)
Min. circuit ampacity
Fan motor
V, phase, Hz
A
A
F.L.A
Model
Compressor
Winding resistance (at 68˚F) "
R.L.A
L.R.A
Refrigerant control
Sound level
dB(A)
Defrost method
Dimensions
Weight
W
D
H
in.
in.
in.
MXZ-3A30NA
lb.
MXZ-3A30NA Remote controller
Control voltage (by built-in transformer)
Refrigerant piping
Valve size
Connection method
Liquid
Gas
Indoor
Outdoor
Refrigerant charge (R410A)
Refrigeration oil (Model)
NOTE : Test conditions are based on ARI 210/240.
❈1 : Rating conditions(cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB)
❈2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB
❈3 : (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 82˚FDB, 65˚FWB
(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB
in.
in.
lb.
oz.
MXZ-3A30NA MXZ-3A30NA -
28,400/ (12,600 ~ 28,400)
28,600/ (11,400 ~ 36,000)
18,800
3,250/ (1,000 ~ 3,250)
2,180/ (740 ~ 2,880)
2,120
8.7 [16.0
]
10.0 (7.5)
13.1
Munsell 3.0Y 7.8/1.1
208/230, 1, 60
20
15
0.93
TNB220FMCH
U-V 0.61 V-W 0.61 W-U 0.61
11
15
LEV
49/49
Reverse cycle
35-7/16
12-19/32
35-7/16
158
1
148
Wireless type
12-24V DC
Not supplied (optional parts)
1/4
A:1/2 B,C:3/8
Flared
Flared
7lb. 11oz.
29.4 (NEO22)
1
Mode
Cooling
❈1: "A" Cooling Steady State at rated compressor Speed
❈3: "B-2" Cooling Steady State at rated compressor Speed
"B-1" Cooling Steady State at minimum compressor Speed
Low ambient Cooling Steady State at minimum compressor Speed
Intermediate Cooling Steady State At Intermediate compressor Speed
Heating
❈1: Standard Rating-Heating at rated compressor Speed
❈2: Low temperature Heating at rated compressor Speed
Max. temperature Heating at minimum compressor Speed
High temperature Heating at minimum compressor Speed
Frost Accumulation at rated compressor Speed
Frost Accumulation at Intermediate compressor Speed
w
At Intermediate compressor Speed
Test
w
Indoor air condition Outdoor air condition
Wet bulb
67
67
67
67
67
60
60
60
60
60
60
w
Dry bulb
80
80
80
80
80
70
70
70
70
70
70
=("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
11
Dry bulb
95
82
82
67
87
47
17
62
47
35
35
Unit: ˚F
Wet bulb
(75)
(65)
(65)
(53.5)
(69)
43
15
56.5
43
33
33
5
OUTLINES AND DIMENSIONS
MXZ-2A20NA MXZ-2A20NA -
6-9/16" 6-21/32"
2-1/2"
1-7/32"21/32"
Air in
Drain hole 3-
14-3/16"
19-11/16"
11-11/32"9-3/16"
1-25/32"
1-1/2"1-7/32"
11/16" 11/16"14-3/16"
4-13/32"
(Base bolt M10)
1-3/16"33-1/16"
5-5/16"
Air in
Air out
[1-5/16"
15/16"
11-3/4" 2-5/8"
29/32"
1
15-19/32"
✕13/16" Oval hole
Indoor and outdoor
connect wiring
3-
[7/8" hole
1-3/16"12-3/4"
1-3/16"
27-15/16"
8-5/8"
More than 3.94 in.
1"
Liquid pipe
[1/4"flared (both A&B unit)
REQUIRED SPACE
Open as a rule
More than 19.69 in.
if the front and both sides are
open
Open as a rule
More than 19.69 in.
if the back, both sides
and top are open
1/2"1-3/16" 13"
Gas pipe
[3/8"flared (both A&B unit)
B unit connection
A unit connection
Unit: inch
More than 3.94 in.
More than 7.87 in.
if there are obstacles to both
sides
More than 13.78 in.
12
Grounding terminal
Conduit
cover
Lock nut
Connector
MXZ-3A30NA
3-15/32"
29/32"
1-1/4"
3-25/32"
29-9/16"
2-11/16"
15"
9-27/32"
1-3/16"
35-7/16"
1-5/16"
(7-7/8")
(5/8")
(1-1/16")
13-31/32"
(5/8")
15-1/4"
1-9/16"
12-19/32" 13/32"
7-7/8" 19-11/16"
35-7/16"
18-1/8"
12-1/2"
1-31/32"
29/32"
9-27/32"
10-5/8"
1-3/8"
1-3/8"
2-29/32"
Indoor and outdoor
connect wiring
4-[7/8" hole
Gas pipe
[1/2" flared (A unit)
[3/8" flared (B,C unit)
[1/4" flared
Liquid pipe
C unit connection
B unit connection
A unit connection
Air in
Drain hole 3-[1-5/16"
Air out
Air in
(Base bolt M10)
2-U-shape notched holes
(Base bolt M10)
2-15/32"✕1-13/32" Oval hole
More than 3.94 in.
Open as a rule
More than 19.69 in.
if the front and both sides are
open
More than 3.94 in.
More than 7.87 in.
if there are
obstacles to both
sides
Open as a rule
More than 19.69 in.
if the back, both sides
and top are open
More than 13.78 in.
Conduit cover
Lock nut
Connector
Unit: inch
REQUIRED SPACE
13
MXZ-3A30NA -
A
B
C
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15/16"
7/16"
5/8"
5/8"
1-1/16"
1-9/16"
14"
15-1/4"
10-5/8"
9-27/32"
1-3/8"
19-11/16" 7-7/8"7-7/8"
2-29/32"
1-3/8"
(Bolt pitch)
Air in
Air out
Air in
2-(15/32"o1-13/32") Oval hole
2-U Shaped notched hole
(Base bolt M10)
3-[7/8"Punched hole
(Connect wiring hole)
35-7/16"
(Connect wiring hole)
2-[7/8"Knockout
Handle
Handle
8-27/32"
1-25/32"
19-1/8"
12-1/2"
18-1/8"
29/32"
13/32"12-19/32"1-3/16"
3-15/32"
Gas pipe
[3/8 (B,C unit)
[1/2 (A unit)
More than 3-15/16"
More than 19-11/16"
More than 7-7/8"
More than13-25/32"
More than 3-15/16"
More than 19-11/16"
More than 13-25/32"
More than 13-25/32"
More than 3-15/16"
SERVICE SPACE
More than 3-15/16"
More than 19-11/16"
5-3/16"
Liquid pipe
[1/4 flared
35-7/16"
1-3/16"
4-3/4"
(Base bolt M10)
Drain hole 3-[1-5/16"
Note : Leave front and both sides
clearance fully.
Note : Leave front and overhead
clearance fully.
Note : Leave front, overhead and
both sides clearance fully.
1.Installation space
2.Service space
C unit connection
B unit connection
A unit connection
Conduit cover
Lock nut
Connector
1
Unit: inch
14
6
MXZ-2A20NA
WIRING DIAGRAM
15
MXZ-2A20NA -
1
16
MXZ-3A30NA
17
MXZ-3A30NA -
1
18
7
1
Ball valve with
service port
Ball valve
Strainer
#100
Power
receiver
LEV A
LEV B
Oil separator
Compressor
Defrost
thermistor
RT61
Distributor
Muffler
4-way valve
LEV E
Indoor unit
B
Unit B gas pipe
temperature thermistor
W
Indoor unit
A
Indoor unit
A
Indoor unit
B
Unit A gas pipe
temperature thermistor
W
Capillary tube
O.D.0.14✕I.D.0.09✕19.68
Capillary tube
O.D.0.98✕I.D.0.02✕39.37
Capillary tube
O.D.0.16✕I.D.0.11✕ 3.93
Capillary tube
O.D.0.16✕I.D.0.11✕ 3.93
Discharge
temperature
thermistor RT62
Strainer
#100
Strainer
#100
R.V. coil
OFF
ON
Refrigerant flow in cooling
Refrigerant flow in heating
Ambient
temperature
thermistor
RT65
Outdoor heat
exchanger
temperature
thermistor
RT68
FAN-OUT
HEX-OUT
Service
port
Service
port
Strainer
#100
W Except MXZ-2A20NA - .
REFRIGERANT SYSTEM DIAGRAM
MXZ-2A20NA MXZ-2A20NA -
1
Unit:mm
19
a
b
Outdoor
unit
Indoor
units
49ft.
33ft.
49ft.
Operating Range MXZ-2A20NA MXZ-2A20NA -
1
Outdoor intake air temperature
115˚FDB
14˚FDB
75˚FDB, 65˚FWB
14˚FDB, 12˚FWB
Cooling
Heating
Maximum
Minimum
Maximum
Minimum
Indoor intake air temperature
95˚FDB, 71˚FWB
67˚FDB, 57˚FWB
80˚FDB, 67˚FWB
70˚FDB, 60˚FWB
MAX. REFRIGERANT PIPING LENGTH & PIPE SIZE SELECTION
MXZ-2A20NA MXZ-2A20NA -
Piping length each indoor unit (a, b) 82ft. MAX.
Total piping length (a+b) 164ft. MAX.
Bending point for each unit 25 MAX.
Total bending point 60 MAX.
❋It does not matter which unit is higher.
1
● Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes,refer to the
tables below.
● When diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe.
For further information on Different-diameter pipe, see 15-1.
Indoor unit
class Pipe diameter
09
12
15
Liquid 1/4 Liquid 1/4
Gas 3/8 Gas 3/8
Liquid 1/4 Liquid 1/4
Gas 3/8 Gas 3/8
Liquid 1/4 Liquid 1/4
Gas 3/8 Gas 3/8
Extension pipe diameter
Outdoor unit union diameter
For
Indoor unit A
Indoor unit B
Liquid 1/4
Gas 3/8
Liquid 1/4
Gas 3/8
Unit : inch
20
MXZ-3A30NA
Indoor unit
C
Ball valve with
service port
Ball valve
Distributor
Power
receiver
LEV A
LEV B
LEV C
Oil separator
Compressor
High-pressure
switch
Distributor
Muffler
4-way valve
LEV E
Outdoor
heat
exchanger
Unit C gas pipe
temperature thermistor
Indoor unit
B
Unit B gas pipe
temperature thermistor
Indoor unit
A
Indoor unit
A
Indoor unit
B
Indoor unit
C
Unit A gas pipe
temperature thermistor
Capillary tube
O.D.0.16✕I.D.0.09✕15.75
Capillary tube
O.D.0.10✕I.D.0.02✕39.37
Capillary tube
O.D.0.16✕I.D.0.11✕ 3.54
Discharge
temperature
thermistor RT62
Strainer
#100
Strainer
#100
Strainer
#100
R.V. coil
OFF
ON
Refrigerant flow in cooling
Refrigerant flow in heating
Defrost
thermistor
RT61
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
Strainer
#100
Strainer
#100
Service
port
Service
port
Stop valve
(with service port)
Stop valve
Power
receiver
LEV A
LEV B
LEV C
Oil separator
Compressor
Muffler
4-way valve
LEV F
Indoor unit
C
Indoor unit
B
Indoor unit
A
Indoor unit
A
Indoor unit
B
Indoor unit
C
Capillary tube
O.D.0.10✕I.D.0.02✕39.37
Capillary tube
O.D.0.16✕I.D.0.11✕3.94
Discharge
temperature
thermistor RT62
Service port
Service
port
Strainer
#100
Strainer
#100
Strainer
#100
Strainer
#100
R.V. coil
OFF
ON
Refrigerant flow in cooling
Refrigerant flow in heating
Strainer
#100
Distributor
Outdoor
heat
exchanger
Capillary tube
O.D.0.12✕I.D.0.08✕11.8
Defrost
thermistor
RT61
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
High-pressure
switch
Unit:mm
MXZ-3A30NA -
1
21
Unit:mm
a
c
Outdoor
unit
Indoor
units
33ft.
(MXZ-3A30NA)
49ft.
(MXZ-3A30NA - )
33ft.
b
1
49ft.
(MXZ-3A30NA - )
1
33ft.
(MXZ-3A30NA)
Operating Range MXZ-3A30NA MXZ-3A30NA -
Indoor intake air temperature
Cooling
Heating
Maximum
Minimum
Maximum
Minimum
95˚FDB, 71˚FWB
67˚FDB, 57˚FWB
80˚FDB, 67˚FWB
70˚FDB, 60˚FWB
1
Outdoor intake air temperature
115˚FDB
14˚FDB
75˚FDB, 65˚FWB
14˚FDB, 12˚FWB
MAX. REFRIGERANT PIPING LENGTH & PIPE SIZE SELECTION
MXZ-3A30NA MXZ-3A30NA -
Piping length each indoor unit (a, b, c) 82ft. MAX.
Total piping length (a+b+c) 230ft. MAX.
Bending point for each unit 25 MAX.
Total bending point 70 MAX.
❋It does not matter which unit is higher.
1
● Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes,refer to the
tables below.
● When diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe.
For further information on Different-diameter pipe, see 15-1.
Indoor unit
class Pipe diameter
Liquid 1/4 Liquid 1/4
Gas 3/8 Gas 3/8
Liquid 1/4 Liquid 1/4
Gas 3/8 Gas 3/8
Liquid 1/4 Liquid 1/4
Gas 3/8 Gas 3/8
Liquid 1/4 Liquid 1/4
Gas 1/2 Gas 1/2
Liquid 1/4 Liquid 1/4
Gas 5/8 Gas 5/8
09
12
15
17
24
Extension pipe diameter
22
Outdoor unit union diameter
For
Indoor unit A
Indoor unit B
Indoor unit C
Liquid 1/4
Gas 1/2
Liquid 1/4
Gas 3/8
Liquid 1/4
Gas 3/8
Unit : inch
8
1
1
Capacity
SHF
Input
Outdoor unit
Power supply (V, phase, Hz)
Input
Comp. current (208/230V)
Fan motor current (208/230V)
Condensing pressure
Suction pressure
Discharge temperature
Condensing temperature
Suction temperature
Comp. shell bottom temp.
Ref. pipe length
[Total pipe length for multi-system]
Refrigerant charge (R410A)
Intake air temperature
Fan speed
Airflow
Unit
Btu / h
—
kW
kW
A
A
PSIG
PSIG
˚F
˚F
˚F
˚F
ft.
—
˚F
˚F
rpm
CFM
Heating
22,000
–
1.78
1.743
8.24/7.45
0.43/0.39
363
101
169
106
40
144
47
43
700
1,640
DB
WB
Item
Model
Total
Electrical
circuit
Refrigerant
circuit
Outdoor
unit
Cooling
20,000
–
2.15
2.113
10.08/9.11
0.43/0.39
435
128
190
122
65
146
95
—
650
1,485
208/230, 1, 60
25 [50]
5lb.15oz.
MXZ-2A20NA MXZ-2A20NA -
MXZ-2A20NA MXZ-2A20NA -
DATA
23
1
1
Capacity
SHF
Input
Outdoor unit
Power supply (V, phase, Hz)
Input
Comp. current (208/230V)
Fan motor current (208/230V)
Condensing pressure
Suction pressure
Discharge temperature
Condensing temperature
Suction temperature
Comp. shell bottom temp.
Ref. pipe length
[Total pipe length for multi-system]
Refrigerant charge (R410A)
Intake air temperature
Fan speed
Airflow
Unit
Btu / h
—
kW
kW
A
A
PSIG
PSIG
˚F
˚F
˚F
˚F
ft.
—
˚F
˚F
rpm
CFM
Heating
28,600
–
2.18
2.127
10.15/9.18
0.43/0.39
330
96
150
100
30
125
47
43
600
1,605
DB
WB
Item
Model
Total
Electrical
circuit
Refrigerant
circuit
Outdoor
unit
Cooling
28,400
–
3.25
3.197
15.45/13.97
0.43/0.39
506
136
190
132
48
146
95
—
520
1,365
MXZ-3A30NA MXZ-3A30NA -
208/230, 1, 60
MXZ-3A30NA MXZ-3A30NA -
25 [75]
7lb.11oz.
24
8-1. OPERATING RANGE
1
1
Outdoor unit
Rating
208/230V 60Hz 1[
Guaranteed Voltage
Model
Min. 198V Max. 253V
208V
230V
MXZ-2A20NA
MXZ-2A20NA -
MXZ-3A30NA
MXZ-3A30NA -
w
At Intermediate compressor Speed
=("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
1
Function
Cooling
Heating
"A" Cooling Steady State
at rated compressor Speed
"B-2" Cooling Steady State
at rated compressor Speed
"B-1" Cooling Steady State
at minimum compressor Speed
Low ambient Cooling Steady State
at minimum compressor Speed
Intermediate Cooling Steady State
At Intermediate compressor Speedw
Standard Rating-Heating
at rated compressor Speed
Low temperature Heating
at rated compressor Speed
Max. temperature Heating
at minimum compressor Speed
High temperature Heating
at minimum compressor Speed
Frost Accumulation
at rated compressor Speed
Frost Accumulation
at Intermediate compressor Speedw
DB (˚F)
80
80
80
80
80
70
70
70
70
70
70
WB (˚F)
67
67
67
67
67
60
60
60
60
60
60
Indoor
DB (˚F)
95
82
82
67
87
47
17
62
47
35
35
WB (˚F)
(75)
(65)
(65)
(53.5)
(69)
43
15
56.5
43
33
33
Outdoor
Condition
Intake air
temperature
MXZ-2A20NA MXZ-2A20NA -
(1) POWER SUPPLY
(2) OPERATION
25
w
At Intermediate compressor Speed
=("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
1
Function
Cooling
Heating
"A" Cooling Steady State
at rated compressor Speed
"B-2" Cooling Steady State
at rated compressor Speed
"B-1" Cooling Steady State
at minimum compressor Speed
Low ambient Cooling Steady State
at minimum compressor Speed
Intermediate Cooling Steady State
At Intermediate compressor Speedw
Standard Rating-Heating
at rated compressor Speed
Low temperature Heating
at rated compressor Speed
Max. temperature Heating
at minimum compressor Speed
High temperature Heating
at minimum compressor Speed
Frost Accumulation
at rated compressor Speed
Frost Accumulation
at Intermediate compressor Speedw
DB (˚F)
80
80
80
80
80
70
70
70
70
70
70
WB (˚F)
67
67
67
67
67
60
60
60
60
60
60
Indoor
DB (˚F)
95
82
82
67
87
47
17
62
47
35
35
WB (˚F)
(75)
(65)
(65)
(53.5)
(69)
43
15
56.5
43
33
33
Outdoor
Condition
Intake air
temperature
MXZ-3A30NA MXZ-3A30NA -
MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA MXZ-3A30NA -
The standard 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.
11
(1) GUARANTEED VOLTAGE
198 ~ 253V 60Hz
(2) AIR FLOW
Air flow should be set at MAX.
(3) MAIN READINGS
(1) Indoor intake air wet-bulb temperature : °FWB
(2) Indoor outlet air wet-bulb temperature : °FWB
(3) Outdoor intake air dry-bulb temperature : °FDB
(4) Total input: W
(5) Indoor intake air dry-bulb temperature : °FDB
(6) Outdoor intake air wet-bulb temperature : °FWB
(7) Total input : W
Indoor air wet/dry-bulb temperature difference on the left side of the following chart 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. Compressor starts running at 33Hz (COOL) or 45Hz (HEAT). The frequency at each operation mode is fixed.
7. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.
8. 10 minutes later, measure temperature again and check that the temperature does not change.
INDOOR UNIT OUTDOOR UNIT
Wet-and dry-bulb
thermometers
26
Cooling
}
Heating
}
Wet-and dry-bulb
thermometers
8-2. CAPACITY AND THE INPUT CURVES
09 class
(20Hz)
17 class
(40Hz)
24 class
(56Hz)
15 class
(36Hz)
12 class
(27Hz)
80 85 90 95 100 105 110
80 85 90 95 100 105 110
79
75
72
68
64
79
75
72
68
64
Indoor unit class
(Inverter output
frequency)
Indoor air WB temperature
difference (degree)
7.8
7.2
6.6
5.9
5.3
4.8
9.3
8.5
7.8
7.0
6.3
5.6
11.1
10.2
9.2
8.3
7.5
6.6
12.2
11.2
10.1
9.1
8.2
7.2
10.9
10.0
9.1
8.2
7.3
6.5
09 class
(45Hz)
12 class
(56Hz)
15 class
(75Hz)
14 23 32 41 50 59 14 23 32 41 50 59
Indoor unit class
(Inverter output
frequency)
Indoor air DB temperature
difference (degree)
Indoor intake air Dry-bulb tem
perature (
-F)
Outdoor intake air Wet-bulb temperature (-F)
Outdoor intake air Wet-bulb temperature (-F)
Indoor intake air Dry-bulb temperature (
-F)
24.0
22.2
20.3
18.5
16.6
14.8
12.9
11.1
26.1
24.1
22.1
20.0
18.0
16.0
14.0
12.0
31.9
29.5
27.0
24.6
22.1
19.7
17.2
14.7
59
68
79
79
68
59
09 class
(34Hz)
12 class
(42Hz)
15 class
(56Hz)
17 class
(60Hz)
24 class
(72Hz)
Indoor unit class
(Inverter output
frequency)
Indoor air DB temperature
difference (degree)
24.0
22.2
20.3
18.5
16.6
14.8
12.9
11.1
26.1
24.1
22.1
20.0
18.0
16.0
14.0
12.0
31.9
29.5
27.0
24.6
22.1
19.7
17.2
14.7
35.7
32.9
30.2
27.4
24.7
21.9
19.2
16.5
27.6
25.5
23.4
21.2
19.1
17.0
14.9
12.7
14 23 32 41 50 59 14 23 32 41 50 59
Indoor intake air Dry-bulb tem
perature (
-F)
Outdoor intake air Wet-bulb temperature (-F)
Outdoor intake air Wet-bulb temperature (-F)
Indoor intake air Dry-bulb temperature (
-F)
59
68
79
79
68
59
MXZ-2A20NA MXZ-2A20NA -
11.1
9.3
7.8
10.2
8.5
7.2
9.2
7.8
6.6
8.3
7.0
5.9
7.5
6.3
5.3
difference (degree)
Indoor air WB temperature
4.8
(36Hz)
09 class
Indoor unit class
(Inverter output
frequency)
5.6
12 class
6.6
(50Hz)
15 class
80 85 90 95 100 105 110
(77Hz)
1
79
75
72
68
64
80 85 90 95 100 105 110
79
75
72
68
64
MXZ-3A30NA MXZ-3A30NA -
NOTE:The above broken lines are for the heating operation without any frost and defrost operation.
1
NOTE:The above broken lines are for the heating operation without any frost and defrost operation.
27
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