1. DVM PLUS III INSTALLATION
(Preliminary)

2. DVM PLUS III line up

3. Space requirements
1) Single installation
2) Group installation

4. Installing outdoor unit

5. Anchor bolt position

6. Remove stopper ■ Remove stopper
√ 10 Ton : 4 pieces of stopper in legs of compressor
The stopper is just using only for transportation, not operation

7. Piping layouts (HP)
■ Y joint only
■ Y joint with Header joint

8. EEV Kit

9. Piping length (HP)
Y joint
Main pipe
1st Refnet Joint

10. Piping length (HP)

11. Piping length (HP)

12. Main pipe 1 size increasing
Examples
Example) 34 HP
With 1 bigger size, it can increase cooling capacity by 16.8 %.

13. Selection the refrigerant pipe
1. 명기된 사양은 개발진행에 따라 변경 될 수 있습니다.
2. 배관은 미주 지역에서 구입 가능한 배관으로 선정되어 있습니다.
현지에서 구매가 불가능한 배관을 제외(1, 1 ¼, 1 ½ )하였기에, 배관 선정 사양이 기존의 DVM PLUS 2 대비 해서,
변경될 소지가 있으니 참고 하시길 바랍니다.
(위에 말씀 드린 것처럼 첨부된 문서의 설치 사양은 변경될 소지가 있습니다.)

14. ■ Definitions A1 Branched pipes from outdoor joints to outdoor A2
Outdoor unit A1
Branched pipes from outdoor joints to outdoor A2
Branched pipes between outdoor joints A3
Main Pipes
Branched pipes between branch joints B C
Pipes to indoor units D
Outdoor joints
E, F
Branch joints (Indoor joints)

15. ■ Step 1 – Select pipes to outdoor units from ‘outdoor joints’
Piping Diameter for each Outdoor unit (A1)
Ton HP
Liquid
Gas
H.P. Gas mm
inch 6
7.5
9.52
3/8
19.05
3/4
15.88
5/8 8
10.0
22.23
7/8 10
12.5
12.70
1/2
28.58
1 1/8 A1
Piping Diameter for between outdoor joints (A2)
Ton HP
Liquid
Gas
H.P. Gas mm
inch 6
7.5
9.52
3/8
19.05
3/4
15.88
5/8 8
10.0
22.23
7/8 10
12.5
12.70
1/2
28.58
1 1/8 12
15.0 14
17.5 16
20.0 18
22.5 20
25.0
34.93
1 3/8 22
27.5 24
30.0 26
32.5 28
35.0 30
37.5
■ Step 2 – Select pipes
between outdoor joints A2

16. Piping Diameter for “Main” pipes (A3)
■ Step 3 – Select “Main” pipes
Piping Diameter for “Main” pipes (A3)
Ton HP
Liquid
Gas
H.P. Gas mm
inch 6
7.5
9.52
3/8
19.05
3/4
15.88
5/8 8
10.0
22.23
7/8 10
12.5
12.70
1/2
28.58
1 1/8 12
15.0 14
17.5 16
20.0 18
22.5 20
25.0
34.93
1 3/8 22
27.5 24
30.0 26
32.5 28
35.0 30
37.5 A3

17. Main Pipe Diameter (A3) in case of the farthest indoor unit over 90m
■ Step 3 – Upsizing “Main” pipes, When?
Main Pipe Diameter (A3)
Ton HP
Liquid
Gas
H.P. Gas mm
inch 6
7.5
9.52
3/8
19.05
3/4
15.88
5/8 8
10.0
22.23
7/8 10
12.5
12.70
1/2
28.58
1 1/8 12
15.0 14
17.5 16
20.0 18
22.5 20
25.0
34.93
1 3/8 22
27.5 24
30.0 26
32.5 28
35.0 30
37.5
Outdoor unit A3
The farthest indoor unit
Main Pipe Diameter (A3) in case of the farthest indoor unit over 90m
Ton HP
Liquid
Gas
H.P. Gas mm
inch 6
7.5
12.70
1/2
22.23
7/8
19.05
3/4 8
10.0
28.58
1 1/8 10
12.5
15.88
5/8 12
15.0
34.93
1 3/8 14
17.5 16
20.0 18
22.5 20
25.0 22
27.5 24
30.0 26
32.5 28
35.0
41.28
1 5/8 30
37.5
If the piping length between outdoor to the farthest
indoor unit is over 90m (295ft), use right table. A3

18. ■ Step 4 – Select ‘Outdoor joints’
Model Name
Outdoor unit’s capacity
Liquid & low Pressure gas pipe
MXJ-T3819K
12 ~ 30 Ton
High Pressure gas pipe
MXJ-T3100K D
■ Step 5 – Select the first ‘Branch joints’
Model Name
Outdoor unit’s capacity
Liquid & low Pressure gas pipe Joints
MXJ-YA2512K
6, 8,10 Ton
MXJ-YA2812K
12 Ton
MXJ-YA2815K
14,16,18,20 Ton
MXJ-YA3119K
22, 24, 26, 28 Ton
MXJ-YA3819K
30 Ton
High Pressure gas pipe Joints
MXJ-YA1500K
6 Ton
MXJ-YA2500K
8, 10, 12, 16, 18 Ton
MXJ-YA3100K
20, 22, 24, 26, 28, 30 Ton E

19. ■ Step 5 – Example RVXVHT100FE RVXVHT125FE RVXVHT125FE
Liquid : 1/2
Gas : 1 1/8
Liquid : 1/2
Gas : 1 1/8
(A1)
(A1)
Liquid : 3/8
Gas : 7/8
Liquid : 5/8
Gas : 1 1/8
(A1)
(A2)
A2 capacity = A1 capacity + A1 capacity
Example)
A1 : 7.5 HP → Liquid : 3/8”, Gas : 3/4”
A2 : 15.0 HP → Liquid : 1/2”, Gas : 1 1/8”

20. ■ Step 6 – Select branched pipes between ‘branch joints’
Total indoor unit's capacity
Pipe Diameter (OD, mm/inch)
Liquid
Gas
H.P. Gas mm
inch
51 MBH↓
9.52
3/8
15.88
5/8
51 ~ 79 MBH
19.05
3/4
79 ~ 96 MBH
22.23
7/8
96 ~ 138MBH
12.70
1/2
28.58
1 1/8
138 ~ 160 MBH
160 ~ 240 MBH
240 ~ 336 MBH
19.50
34.93
1 3/8
336 ~ 468 MBH B
■ Step 7 – Select ‘Branch joints’
Model Name
Total indoor unit's capacity
Liquid & low Presssure gas pipe Joints
MXJ-YA1509
51 MBH and below
MXJ-YA2512
Over 51 MBH ~ 138 MBH and below
MXJ-YA2812
Over 138 MBH ~ 160 MBH and below
MXJ-YA2815
Over 160 MBH ~ 240 MBH and below
MXJ-YA3119
Over 240 MBH ~ 336 MBH and below
MXJ-YA3819
Over 336 MBH ~ 468 MBH and below
High Pressure gas pipe Joints
MXJ-YA1500K
79 MBH and below
MXJ-YA2500K
Over 79 MBH ~ 240MBH and below
MXJ-YA3100K
Over 240 MBH ~ 468 MBH and below F

21. Pipe Diameter (OD, mm/inch)
■ Step 8 – Select pipes to indoor units
Indoor unit's capacity
Pipe Diameter (OD, mm/inch)
Liquid
Gas mm
inch
6 ~ 20 MBH
9.52
3/8
12.70
1/2
24 ~48 MBH
15.88
5/8

22. Additional refrigerant
√ Additional refrigerant has to be charged according to the length and size of liquid pipe.
Liquid pipe size (O.D. mm)
Additional refrigerant charging (lbs/ft)
Φ 1/4 (Φ 6.4)
Φ 3/8 (Φ 9.5)
Φ 1/2 (Φ 12.7)
Φ 5/8 (Φ 15.9)
Φ 3/4 (Φ 19.1)
Φ 7/8 (Φ 22.2)
MCU
lbs
Each MCU
1.1
Liquid line after expanding
(From Sing EEV kits, or From MCUs)
Each liquid line
0.022

23. Outdoor joint (HP, HR) Ex) MXJ-T3819*, MXJ-T4422 - Liquid connection
- Gas connection

24. Outdoor joint (HR Only)
Ex) MXJ-T3100*
- High pressure gas connection

25. Y- joint (HP, HR)
Ex) MXJ-YA1509

26. Y- joint (HR Only)
Ex) MXJ-YA1500 ~ MXJ-YA3800

27. Header- joint (HP only)
Ex) MXJ-HA2512

28. Outdoor units piping
 ■ Refrigerant piping should be the same level or lower than connecting position.
Correct piping work
Wrong piping work
Accumulating of oil

29. Outdoor units piping
 ■ Refrigerant piping should be connected with side direction.
Correct piping work
Wrong piping work
Unbalancing of Ref. & oil distribution
Refrigerant can excessively leans to one direction.

30. Refrigerant can excessively leans to one direction.
Outdoor units piping
 ■ Refrigerant piping should be connected with side direction.
Correct piping work
Wrong piping work
Refrigerant can excessively leans to one direction.

31. Outdoor units piping
 ■ Refrigerant piping should be installed in a horizontal direction.
Correct piping work
Wrong piping work
Be horizontal
Min. 4 inch

32. Outdoor units piping Vertical trap ■ Vertical trap Correct piping work
Wrong piping work
8 ~ 12 inch
40 inch
80 inch
Vertical trap
80 inch

33. ■ Connecting the outdoor unit pipe
Outdoor units piping
 ■ Connecting the outdoor unit pipe
Single installation
Module installation
Front connection
Front connection
Oil valve size : 1/4 inch
Bottom connection
Bottom connection

34. Refnet Y Joint Installation
Horizontally installed
Vertically installed
Vaporized refrigerant leans to upper direction in Y joint.
For uniform refrigerant distribution

35. Header joint installation Refnet Head Joint Installation
Liquid head Joint
Vaporized refrigerant leans to one of direction in branch joint.
Header Joint
Gas head Joint
Do not install vertically.

36. Header joint installation
Connect according to larger capacity of indoor unit in order

37. Piping work Taping Nitrogen replacement before brazing
Without nitrogen gas blowing
With nitrogen gas blowing

38. Insulation work
※ Application condition : indoor temperature : 80℉, 80% RH

39. Insulation work

40. Insulation work

41. Wiring work 3 Phase 3 wires Caution
Be sure to install the switch and the fuse to the power line of each equipment.
(Field wiring work)

42. Use ring terminal for wiring terminal block
Wiring work
Caution of wiring work
208 ~ 230V
208 ~ 230V
208 ~ 230V
Hold wiring with using cable tie
Note
Use ring terminal for wiring terminal block

43. Wiring work

44. Leak test

45. Oil piping should be performed a vacuum
Vacuum drying
Oil piping should be performed a vacuum

46. Setting option switch PCB Outdoor’s control part BLDC Fan Driver
Transformer
Filter PCB
Magnet
CT Sensor
BLDC Fan
Driver
Power TB
Outdoor-indoor unit communication
Outdoor – outdoor unit communication

47. Setting option switch
Sensor
220 V output

48. Setting option switch

49. conventional flare tool
INSTALLATION TOOLS – Exclusive Use to R410A
Tool
Using reason
Specification
Manifold gauge   
R410A is composed H-F-C as different as R22 is composed C-F-Cl.
Don't use mineral oil when gauge pressure to prevent contamination.
Only for R410A.
High pressure gauge : -0.1~5.3㎫
Low pressure gauge : -0.1~3.8㎫
Connection port diameter : 5/16 flare
No oil used
Manifold
charging
hose
Change in service port diameter
R410A has high pressure as compared with R22.
It should be made of materials are not affected a using refrigerant.
Working pressure : 5.08㎫
Bursting pressure : 25.4㎫
Vacuum pump
   
R410A is used with a ploy ester oil but a vacuum pump uses a conventional mineral oil.
The degree of vacuum is  5torr Ÿ Need a check valve to prevent reverse oil flow if using a conventional vacuum pump
Flaring Tool
Need a flare gauge for R410A.
When using a conventional flare tool, the pipe extension margin should be 1.0~1.5mm or 1.5~2.0.
Torque spanners
Increase a connecting torque.
*Adding a proper
torque to the pipe
using R410A when
connect pipes to
flare nuts.
Refrigerant
oil
Coat the connection with refrigerant oil film. If not, leakage is possible because of the pressure of R410A.
Coat after flare work on pipe connection.
All refrigerants are available as using a synthetic oil
High rust resistance
Long stability over long period time
Gas
leak tester
     
Since R410A don't have chlorine, the tester must can detect Hydrogen.
R410A,R407C(E),R404A,R507A,R134a,R12,R22,R502,R500 are detected.
Available in the range of 0 to 40℃. D
A(㎜)
flare tool fit on R410A
conventional flare tool
clutch type
wing nut type
6.35
0~0.5
1.0~1.5
1.5~2.0
9.52
12.70
15.88
nominal dimension
Torque (N·m)
6.35
14.2~17.2
9.52
32.7~39.9
12.70
49.5~60.3
15.88
61.8~75.4