Midea ATOM MDV-V28WDHN1 User manual

MDV-V28WDHN1(AtB)
MDV-V36WDHN1(AtB)
MDV-V42WDHN1(AtB)
MDV-V48WDHN1(AtB)
MDV-V56WDHN1(AtB)
Commercial Air Conditioners
R410A
Model:

Atom B Series VRF 50/60Hz
1
CONTENTS
CONTENTS
Part 1 General Information............................................................................3
Part 2 Outdoor Unit Engineering Data .......................................................13
Part 3 System Design and Installation........................................................ 68

Atom B Series VRF 50/60Hz
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Midea Atom B Series Engineering Data Book

Atom B Series VRF 50/60Hz
3
Part 1 – General Information
Part 1
General Information
1 Indoor and Outdoor Unit Capacities........................................................ 4
2 External Appearance............................................................................... 5
3 Nomenclature......................................................................................... 6
4 Combination Ratio .................................................................................. 7
5 Selection Procedure................................................................................ 8

Atom B Series VRF 50/60Hz
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Midea Atom B Series VRF Engineering Data Book
1Indoor and Outdoor Unit Capacities
1.1 Indoor Units
Table 1-1.1: Indoor unit abbreviation codes
Abbreviation code
Type
Q1
One-way Cassette
Q4C
Compact Four-way Cassette
Q4
Four-way Cassette
T2
Medium Static Pressure Duct
G
Wall-mounted
DL
Ceiling and Floor
Table 1-1.2: Indoor unit capacity range
Capacity
Capacity
index
Q1
Q4C
Q4
T2
G
DL
kBtu/h
kW
HP
6
1.8
0.6
6
6
—
—
—
—
7
2.2
0.8
7
7
7
—
7
7
9
2.8
1
9
9
9
9
9
9
12
3.6
1.25
12
12
12
12
12
12
12
15
4.5
1.6
15
15
15
15
15
15
15
18
5.6
2
18
18
—
18
18
18
18
24
7.1
2.5
24
24
—
24
24
24
24
28
8.0
3
28
—
—
28
28
28
28
32
9.0
3.2
32
—
—
32
32
32
32
36
10.0
3.6
36
—
—
36
—
—
36
40
11.2
4
40
—
—
40
40
—
40
48
14.0
5
48
—
—
48
48
—
48
56
16.0
6
56
—
—
56(DC)
56
—
Notes:
1. Atom series indoor units could connect to Atom series outdoor units.
1.2 Outdoor Units
Table 1-1.3: Outdoor unit capacity range
Capacity (kBtu/h)
Model Name
28
MDV-V28WDHN1(AtB)
36
MDV-V36WDHN1(AtB)
42
MDV-V42WDHN1(AtB)
48
MDV-V48WDHN1(AtB)
56
MDV-V56WDHN1(AtB)
Notes:
1. Atom series outdoor units could not be combined.

Atom B Series VRF 50/60Hz
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Part 1 –
General Information
2External Appearance
2.1 Indoor Units
Table 1-2.1: Indoor unit appearance
One-way Cassette
Four-way Cassette
Q1
Q4
Compact Four-way Cassette
Wall-mounted
Q4C G
Medium Static Pressure Duct
Ceiling and Floor
T2
DL
2.2 Outdoor Units
Table 1-2.2: Outdoor unit appearance
28kBtu/h
36/42/48/56kBtu/h

Atom B Series VRF 50/60Hz
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Midea Atom B Series VRF Engineering Data Book
3Nomenclature
3.1 Indoor Units
MDV
-
D
09
Q4
/
N1
-
E
(At)
①
②
③
④
⑤
⑥
⑦
Legend
No.
Code
Remarks
1
MDV
Midea VRF
2
D
VRF indoor unit
3
09
Capacity index (the capacity in kBtu/h)
4
Q4
Indoor unit type
Q1: One-way Cassette
Q4C: Compact Four-way Cassette
Q4: Four-way Cassette
T2: Medium Static Pressure Duct
G: Wall Mounted
DL: Ceiling and Floor
5
N1
Refrigerant type (N1: R410A)
6
E
Design code
7
At
Atom series
3.2 Outdoor Units
MDV
-
V
28
W
D
H
N1
(AtB)
①
②
③
④
⑤
⑥
⑦
⑧
Legend
No.
Code
Remarks
1
MDV
Midea VRF
2
V
All DC inverter
3
28
Capacity index (the capacity in kBtu/h)
4
W
VRF outdoor unit
5
D
DC inverter compressor
6
H
Power supply
Omit: 1 phase, 220-240V, 50Hz
H: 1 phase, 220-240V, 50/60Hz
7
N1
Refrigerant type (N1: R410A)
8
AtB
Atom B series

Atom B Series VRF 50/60Hz
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Part 1 –
General Information
4Combination Ratio
Table 1-4.1: Indoor and outdoor unit combination ratio limitations
Type Minimum combination ratio Maximum combination ratio
Atom Series outdoor units
45%
130%
Table 1-4.2: Combinations of Indoor and outdoor units
Outdoor unit capacity
Sum of capacity indexes of
connected indoor units (standard
indoor units only)
Number of connected
indoor units
kBtu/h
Capacity
index
28 28 12.6 to 36.4 1-4
36 36 16.2 to 46.8 1-6
42 42 18.9 to 54.6 1-7
48 48 21.6 to 62.4 1-8
56 56 25.2 to 72.8 1-9
Combination ratio = Sum of capacity indexes of the indoor units
Capacity index of the outdoor unit

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Midea Atom B Series VRF Engineering Data Book
5Selection Procedure
5.1 Procedure
Step 1: Establish design conditions
Step 2: Select indoor units
Step 3: Select outdoor unit
Notes:
1. If the indoor design temperature falls between two temperatures listed in the indoor unit's capacity table, calculate the corrected capacity by interpolation.
If the indoor unit selection is to be based on total heat load and sensible heat load, select indoor units which satisfy not only the total heat load requirements
of each room but also the sensible heat load requirements of each room. As with total heat capacity, the sensible heat capacity of indoor units should be
corrected for indoor temperature, interpolating where necessary. For the indoor unit capacity tables, refer to the indoor unit technical manuals.
Yes
Design temperature and humidity (indoor and outdoor)
Required heat load of each room
System peak load
Piping length, level differences
Indoor unit specifications (type and quantity)
Decide indoor unit safety factor
Select indoor unit models ensuring that:
Indoor unit capacity corrected for indoor air temperature WB1 ≥ Required heat load × Indoor unit safety factor
Determine required total heat load on the outdoor unit
Use the sum of the peak load of each room Use the system peak load
Provisionally select outdoor unit capacity based on combination ratio limitations
Confirm that the number of indoor units connected to the outdoor unit is within limitation
Correct cooling and heating capacities of the outdoor unit for the following items:
Outdoor
air temperature / Indoor air temperature WB / Combination ratio / Piping length, level difference
/ Piping heat loss / Frost accumulation (for heating capacity only)
Is corrected outdoor unit capacity ≥ Required total heat load on outdoor unit?
VRF system selection is complete
No

Atom B Series VRF 50/60Hz
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Part 1 –
General Information
5.2 Example
The following is a selection example based on total heat load for cooling.
Figure 1-5.1: Room plan
Room A
Room B
Room C
Room D
Step 1: Establish design conditions
 Indoor air temperature 25°C DB, 18°C WB; outdoor air temperature 33°C DB.
 Determine peak load of each room and system peak load. As shown in Table 1-5.1, the system peak load is 10.5kW.
Table 1-5.1: Required heat load of each room (kW)
Time Room A Room BRoom CRoom DTotal
9:00 2.5 1.6 1.6 1.6 7.3
12:00 3.2 2.4 2.4 2.4 10.4
14:00 3.1 2.4 2.4 2.6 10.5
16:00 3.1 2.3 2.3 2.3 10
 The maximum piping lengths and level differences in this example are as given in Figure 1-5.2.
Figure 1-5.2: System diagram
 Indoor unit type for all rooms: Medium Static Pressure Duct (T2).
Step 2: Select indoor units
 In this example, a safety factor is not used (i.e. the safety factor is 1).
 Select indoor unit models using the medium static pressure duct cooling capacity table. Each indoor unit's corrected
capacity needs to be greater than or equal to the peak load of the relevant room. The selected indoor units are shown
in Table 1-5.3.
Equivalent length of piping 20m
Level
difference
10m
Outdoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit

Atom B Series VRF 50/60Hz
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Midea Atom B Series VRF Engineering Data Book
Table 1-5.2: Extract from medium static pressure duct (T2) cooling capacity table
Model
Capacity
index
Indoor air temperature
14°C WB
16°C WB
18°C WB
19°C WB
20°C WB
22°C WB
24°C WB
20°C DB
23°C DB
26°C DB
27°C DB
28°C DB
30°C DB
32°C DB
kBtu/h
kW×10
TC
SHC
TC
SHC
TC
SHC
TC
SHC
TC
SHC
TC
SHC
TC
SHC
T2
7
22
1.5
1.4
1.8
1.5
2.1
1.6
2.2
1.6
2.3
1.7
2.4
1.5
2.4
1.5
9
28
1.9
1.7
2.3
1.9
2.6
2.1
2.8
2.1
3.0
2.1
3.1
2.0
3.1
1.9
12
36
2.5
2.1
2.9
2.3
3.4
2.5
3.6
2.6
3.8
2.7
4.2
2.8
3.9
2.3
15
45
3.1
2.6
3.7
2.8
4.2
3.1
4.5
3.2
4.8
3.2
4.9
3.1
5.1
2.9
18
56
3.9
3.0
4.6
3.3
5.3
3.6
5.6
3.7
5.9
3.8
6.2
3.7
6.2
3.4
24
71
4.9
3.9
5.8
4.3
6.7
4.7
7.1
4.9
7.5
4.8
7.8
4.6
7.8
4.3
28
80
5.5
4.4
6.6
4.9
7.5
5.3
8.0
5.5
8.4
5.5
8.8
5.2
8.8
4.8
32
90
6.2
5.3
7.3
5.8
8.4
6.3
9.0
6.4
9.6
6.5
9.9
6.1
9.9
5.7
40
112
7.7
6.4
9.1
7.1
10.5
7.7
11.2
7.8
11.9
8.1
12.5
7.8
12.5
7.4
48
140
9.7
7.8
11.3
8.6
13.2
9.6
14.0
9.8
14.8
9.8
15.7
9.7
15.4
8.8
Abbreviations:
TC: Total capacity (kW); SHC: Sensible heat capacity (kW)
Table 1-5.3: Selected indoor units
Room A
Room B
Room C
Room D
Peak heat load (kW)
3.1
2.4
2.4
2.6
Selected indoor unit
MDV-D12T2/N1-DA5(At)
MDV-D09T2/N1-DA5(At)
MDV-D09T2/N1-DA5(At)
MDV-D09T2/N1-DA5(At)
Corrected TC (kW)
3.6
2.8
2.8
2.8
Step 3: Select outdoor unit
 Determine the required total heat load from the indoor units to the outdoor unit based on either the sum of the peak
loads of each room or the system peak load. In this example, it is determined based on the system peak load. Therefore,
the required heat load is 10.5kW.
 Provisionally select an outdoor unit using the sum of the capacity indexes (CIs) of the selected indoor units (as shown
in Table 1-5.4), ensuring that the combination ratio is between 50% and 130%. Refer to Table 1-5.5. As the sum of CIs
of the indoor units is 120, all outdoor units are potentially suitable except 8kW. Start from the smaller, which is the
10kW unit.
Table 1-5.4: Sum of indoor unit capacity indexes
Model
Capacity Index
No. of units
MDV-D12T2/N1-DA5(At)
36
1
MDV-D09T2/N1-DA5(At)
28
3
Sum of CIs
120
Table 1-5.5: Combinations of Indoor and outdoor units
Outdoor unit capacity
Sum of capacity indexes of
connected indoor units
(standard indoor units only)
kBtu/h
Capacity
index
28
28
14 to 36.4
36
36
18 to 46.8
42
42
21 to 54.6
48
48
24 to 62.4
56
56
28 to 72.8

Atom B Series VRF 50/60Hz
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Part 1 – General Information
 The number of connected indoor units is 4 and the maximum number of connected indoor units on the 10kW outdoor
unit is 6, so the number of connected indoor units is within the limitation.
 Calculate the corrected capacity of the outdoor unit:
a) The sum of the indoor unit CIs is 120 and the CI of the 10kW outdoor unit is 100, so the combination ratio is 120 /
100 = 120%.
b) Using the outdoor unit’s cooling capacity table, interpolate to obtain the capacity (“B”) corrected for outdoor air
temperature, indoor air temperature, and combination ratio. Refer to Tables 1-5.6 and 1-5.7.
Table 1-5.6: Extract from Table 2-7.2 MDV-V36WDHN1(AtB)
cooling capacity
Table 1-5.7: Cooling capacity calculated by interpolation
CR
Outdoor
air
temp.
(°C DB)
Indoor air temp.
(°C DB / °C WB)
CR
Outdoor
air
temp.
(°C DB)
Indoor air temp.
(°C DB / °C WB)
25.8 / 18.0
25.8 / 18.0
TC
PI
TC
PI
kW
kW
kW
kW
120%
31
10.56
2.50
120%
33
10.44
2.59
33
10.44
2.59
35
10.22
2.68
B =10.44
110%
31
10.33
2.44
110%
33
10.22
2.57
33
10.22
2.57
35
10.00
2.66
c) Find the correction factor for piping length and level difference (“K1”)
Figure 1-5.3: Atom rate of change in cooling capacity
d) Calculate the corrected capacity of MDV-V36WDHN1(AtB) (“C”) by using K1:
C = B × K1 = 10.44 × 0.968 =10.1kW
 The corrected capacity 10.1 kW is lower than required total heat load 10.5kW, so selection is not complete. Step 3
should be repeated from the point where the outdoor unit capacity is provisionally selected.
Repeat Step 3: Select outdoor unit
 Determine the required total heat load from the indoor units to the outdoor unit based on either the sum of the peak
loads of each room or the system peak load. In this example, it is determined based on the system peak load. Therefore,
the required heat load is 10.5kW.

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Midea Atom B Series VRF Engineering Data Book
 Provisionally select an outdoor unit using the sum of the capacity indexes (CIs) of the selected indoor units (as shown
in Table 1-5.5), ensuring that the combination ratio is between 50% and 130%. Refer to Table 1-5.6. As the sum of CIs
of the indoor units is 120. For the 10kW unit is not suitable, try to select 12kW unit.
 The number of connected indoor units is 4 and the maximum number of connected indoor units on the 12kW outdoor
unit is 7, so the number of connected indoor units is within the limitation.
 Calculate the corrected capacity of the outdoor unit:
a) The sum of the indoor unit CIs is 120 and the CI of the 12kW outdoor unit is 120, so the combination ratio is 120 /
120 = 100%.
b) Using the outdoor unit’s cooling capacity table, interpolate to obtain the capacity (“B”) corrected for outdoor air
temperature, indoor air temperature, and combination ratio. Refer to Tables 1-5.8 and 1-5.9.
Table 1-5.8: Extract from Table 2-7.3 MDV-V42WDHN1(AtB)
cooling capacity
Table 1-5.9: Cooling capacity calculated by interpolation
CR
Outdoor
air
temp.
(°C DB)
Indoor air temp.
(°C DB / °C WB)
CR
Outdoor
air
temp.
(°C DB)
Indoor air temp.
(°C DB / °C WB)
25.8 / 18.0
25.8 / 18.0
TC
PI
TC
PI
kW
kW
kW
kW
100%
31
11.2
2.46
100%
33
11.2
2.63
33
11.2
2.76
35
11.2
2.80
B = 11.2
90%
31
10.1
2.11
90%
33
10.1
2.26
33
10.1
2.37
35
10.1
2.40
c) Find the correction factor for piping length and level difference (“K1”)
Figure 1-5.4: Atom rate of change in cooling capacity
d) Calculate the corrected capacity of MDV-V42W/DHN1(At) (“C”) by using K1:
C = B × K1 = 11.2 × 0.968 =10.84kW
 The corrected capacity 10.84 kW is larger than required total heat load 10.5kW, so selection is complete.

Atom B Series VRF 50/60Hz
13
Part 2 - Outdoor Unit Engineering Data
Part 2
Outdoor Unit
Engineering Data
1 Specifications........................................................................................14
2 Dimensions ...........................................................................................15
3 Installation Space Requirements ...........................................................17
4 Piping Diagrams .................................................................................... 18
5 Wiring Diagrams.................................................................................... 20
6 Electrical Characteristics........................................................................ 22
7 Capacity Tables...................................................................................... 23
8 Operating Limits....................................................................................64
9 Sound Levels .........................................................................................65
10 Accessories..........................................................................................67

Atom B Series VRF 50/60Hz
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Midea Atom B Series Engineering Data Book
1Specifications
MDV-V28WDHN1(AtB) / MDV-V36WDHN1(AtB) / MDV-V42WDHN1(AtB)
Table 2-1.1: 28/36/42 model specifications
Model
MDV-V28WDHN1(AtB)
MDV-V36WDHN1(AtB)
MDV-V42WDHN1(AtB)
Power supply
V-Ph-Hz
220-240/1/ 50(60)
Cooling1
Capacity
kBtu/h
27
34
41
kW
8
10
12
Input
kW
2.1
2.66
3.31
EER
kW/ KW
3.81
3.76
3.63
Heating2
Capacity
kBtu/h
30
41
47
kW
9
12
14
Input
kW
2.04
3.15
3.64
COP
kW/ kW
4.41
3.81
3.85
Connectable
indoor unit
Total capacity
45~130% of outdoor unit capacity
Quantity
1~4
1~6
1~7
Compressor
Type
DC inverter
DC inverter
DC inverter
Quantity
1
1
1
Oil type
RB74AF
RB74AF
RB74AF
Fan
Motor type
DC motor
DC motor
DC motor
Quantity
1
1
1
Output
W
80
170
170
Outdoor air flow
m3/h
3700
5200
5000
Sound pressure level3
dB(A)
54
54
56
Net dimensions (W×H×D)4
mm
910 x 712 x 426
950 x 840 x 440
950 x 840 x 440
Packed dimensions (W×H×D)
mm
1045 x 810 x 485
1025 x950 x 510
1025 x950 x 510
Net weight
kg
49
59.5
63
Gross weight
kg
53
66.5
70
Refrigerant
Type
R410A
R410A
R410A
Factory charge
g
1700
2300
2400
Throttle type
Electronic expansion valve
Pipe connections
Liquid pipe
mm
Ф9.53
Ф9.53
Ф9.53
Gas pipe
mm
Ф15.9
Ф15.9
Ф15.9
Ambient Temp.
operation range
Cooling
oC
-5~55
Heating
oC
-15~27
Notes:
1. The cooling conditions: indoor temp: 27 oC DB (80.6 oF), 19oC WB (66.2 oF) outdoor temp: 35 oC DB (95 oF) equivalent pipe length: 5m drop length: 0m.
2. The heating conditions: indoor temp: 20 oC DB (68oF), 15 oC WB (44.6 oF) outdoor temp.: 7 oC DB (42.8 oF) equivalent pipe length: 5m drop length: 0m.
3. Sound level: Anechoic chamber conversion value, measured at a point 1 m in front of the unit at a height of 1m for 28/26 model, 1.2m for 42 model. During
actual operation, these values are normally somewhat higher as a result of ambient conditions.
4. Diameters given are those of the unit's stop valves.
5. The above data may be changed without notice for future improvement on quality and performance.

Atom B Series VRF 50/60Hz
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Part 2 - Outdoor Unit Engineering Data
MDV-V48WDHN1(AtB) / MDV-V56WDHN1(AtB)
Table 2-1.2: 48/52 model specifications
Model
MDV-V48WDHN1(AtB)
MDV-V56WDHN1(AtB)
Power supply
V-Ph-Hz
220-240/1/ 50(60)
Cooling1
Capacity
kBtu/h
47
52
kW
14
15.5
Input
kW
3.97
4.87
EER
kW/ KW
3.53
3.18
Heating2
Capacity
kBtu/h
54
61
kW
16
18
Input
kW
3.98
4.82
COP
kW/ kW
4.02
3.73
Connectable
indoor unit
Total capacity
45~130% of outdoor unit capacity
Quantity
1~8
1~9
Compressor
Type
DC inverter
DC inverter
Quantity
1
1
Oil type
RB74AF
RB74AF
Fan
Motor type
DC motor
DC motor
Quantity
1
1
Output
W
170
170
Outdoor air flow
m3/h
5200
5000
Sound pressure level3
dB(A)
56
56
Net dimensions (W×H×D)4
mm
950 x 840 x 440
950 x 840 x 440
Packed dimensions (W×H×D)
mm
1025 x950 x 510
1025 x950 x 510
Net weight
kg
75
77.5
Gross weight
kg
82
84.5
Refrigerant
Type
R410A
R410A
Factory charge
g
3100
3600
Throttle type
Electronic expansion valve
Pipe connections
Liquid pipe
mm
Ф9.53
Ф9.53
Gas pipe
mm
Ф15.9
Ф19.1
Ambient Temp.
operation range
Cooling
oC
-5~55
Heating
oC
-15~27
Notes:
1. The cooling conditions: indoor temp: 27 oC DB (80.6 oF), 19oC WB (66.2 oF) outdoor temp: 35 oC DB (95 oF) equivalent pipe length: 5m drop length: 0m.
2. The heating conditions: indoor temp: 20 oC DB (68 oF), 15 oC WB (44.6 oF) outdoor temp.: 7 oC DB (42.8 oF) equivalent pipe length: 5m drop length: 0m.
3. Sound level: Anechoic chamber conversion value, measured at a point 1 m in front of the unit at a height of 1m for 28/26 model, 1.2m for 42 model. During
actual operation, these values are normally somewhat higher as a result of ambient conditions.
4. Diameters given are those of the unit's stop valves.
5. The above data may be changed without notice for future improvement on quality and performance.

Atom B Series VRF 50/60Hz
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Midea Atom B Series Engineering Data Book
2Dimensions (unit: mm)
Figure 2-2.1: Model 28 Front view dimensions Figure 2-2.2: Model 28 Top view dimensions
Figure 2-2.3: Model 36-56 Front view dimensions Figure 2-2.4: Model 36-56 Top view dimensions
Model
A
B
C
D
E
F
G
H
I
28
910
982
390
345
120
663
712
375
426
36/42/48/56
950
/
406
360
175
590
840
390
440

Atom B Series VRF 50/60Hz
17
Part 2 - Outdoor Unit Engineering Data
3Installation Space Requirements
Figure 2-3.1: Single unit installation top view (unit: mm) Figure 2-3.2: Single unit installation side view (unit: mm)
Figure 2-3.3: Multiple unit installation top view (unit: mm)
Figure 2-3.4: Multiple unit installation side view (unit: mm)

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Midea Atom B Series Engineering Data Book
4Piping Diagrams
Figure 2-4.1: 28 model Piping diagram
Figure 2-4.2: 36 model Piping diagram
Oil
return
hole
Temperature
sensor
Distributor
Liquid pipe
Temperature
sensor
4 way valve
Gas pipe
Compressor
Temperature
sensor
Low pressure switch
Accumulator
Refrigerant
radiator
module
Temperature
sensor
Filter
Filter
Oil return capiliary
Oil seperator
DC motor
Silencer
High pressure switch
Temperature
sensor
Distributor
Liquid pipe
Temperature
sensor
4 way valve
DC motor
Gas pipe
Compressor
Temperature
sensor
Low pressure switch
Accumulator
Refrigerant
radiator
module
Temperature
sensor
Filter
Filter
Oil return capiliary
Oil sepetator

Atom B Series VRF 50/60Hz
19
Part 2 - Outdoor Unit Engineering Data
Figure 2-4.2: 42 model Piping diagram
Figure 2-4.3: 48/56 model Piping diagram
Key components:
1. Oil separator:
Separates oil from gas refrigerant pumped out of the compressor and quickly returns it to the compressor. Separation
efficiency is up to 99%.
2. Accumulator:
Stores liquid refrigerant and oil to protect compressor from liquid hammering.
3. Electronic expansion valve (EXV):
Controls refrigerant flow and reduces refrigerant pressure.
4. Four-way valve(ST1):
Controls refrigerant flow direction. Closed in cooling mode and open in heating mode. When closed, the heat
exchanger functions as a condenser; when open, the heat exchanger functions as an evaporator.
5. High and low pressure switches:
Regulate system pressure. When system pressure rises above the upper limit or falls below the lower limit, the high or
low pressure switches turn off, stopping the compressor. After 5 minutes, the compressor restarts.
High pressure
switch
Temperature
sensor
Distributor
Liquid pipe
Temperature
sensor
4 way valve
DC motor
Gas pipe
Compressor
Temperature
sensor
Low pressure switch
Accumulator
Refrigerant
radiator
module
Temperature sensor
Oil return capiliary
Oil seperator
Filter
Electronic
expansion
valve
High pressure
switch
Temperature
sensor
Distributor
Liquid pipe
Temperature
sensor
4 way valve
DC motor
Gas pipe
Compressor
Temperature
sensor
Low pressure switch
Accumulator
Refrigerant
radiator
module
Temperature sensor
Oil return capiliary
Oil seperator
Filter
Electronic
expansion
valve