Installing The Refrigerant Piping - Mitsubishi Electric TRANE CITY MULTI TPMFYP-BM140 Series Installation Manual

2. Installing the indoor unit
90°
B
A
A Fresh air intake hole (Knock out)
B 4-1/8 in. (ø2.8) burring hole
Fig. 2-8

3. Installing the refrigerant piping

A B
45°±2°
Fig. 3-1
Flare cutting dimensions
A
Copper pipe O.D.
1/4" (ø6.35)
3/8" (ø9.52)
1/2" (ø12.7)
5/8" (ø15.88)
3/4" (ø19.05)
A
A
Fig. 3-2
B
Copper pipe O.D. Flare tool for R410A
Clutch type
1/4" (ø6.35) 0-1/64 (0 - 0.5)
3/8" (ø9.52) 0-1/64 (0 - 0.5)
1/2" (ø12.7) 0-1/64 (0 - 0.5)
5/8" (ø15.88) 0-1/64 (0 - 0.5)
3/4" (ø19.05) 0-1/64 (0 - 0.5)
3.2. Connecting pipes (Fig. 3-1)
When commercially available copper pipes are used, insulate both the liquid and
gas pipes separately with commercially available insulation materials (heat-resistant
to 100 °C, 212 °F or more, thickness of 12 mm, 1/2 inch or more). (Fig. 3-3)
• The indoor parts of the drain pipe should be wrapped with polyethylene foam in-
sulation materials ����� g ravity of 0.03, thickness of 23/64 in. (9 mm) or more).
Flare nut tightening torque
B
Pipe size
(mm, inch)
ODø6.35
P006, P008, P012, P015
1/4"
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C
* Do not apply refrigerating machine oil to the screw por�����������������������������
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D
9-13/16 (250)
11-3/8 (288.5)
A
C
in. (mm)
Flare dimensions
øA dimensions
11/32-23/64 (8.7 - 9.1)
1/2-33/64 (12.8 - 13.2)
41/64-21/32 (16.2 - 16.6)
49/64-25/32 (19.3 - 19.7)
15/16-61/64 (23.6 - 24.0)
A Die
B Copper pipe
in. (mm)
A
R410A
Liquid pipe Gas pipe
Tightening
Pipe size
torque
(mm, inch)
(N·m, ft·lbs)
14 - 18 ODø12.7
10 - 13 1/2"
ce.
unit. (Use of commercially-available products may result in cracking.)
2.5. Fresh air intake hole (Fig. 2-8)
in. (mm)
At the time of installation, use the hole (knock out) located at the positions shown
in following diagram, as and when required.
Note:
Make sure that the fresh air intake is no more than 20% of the entire air intake
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Caution:
Linkage of duct fan and air conditioner.
If a duct fan is used, be sure to link it with the air conditioner when outside
air is taken in.
Do not run just the duct fan. Otherwise, condensation may form.
in. (mm)
3.1. Precautions
For devices that use R410A refrigerant
• Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration oil
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• Use C1220 copper phosphorus, for copper and copper alloy seamless pipes, to
connect the refrigerant pipes. Use refrigerant pipes with the �����������
D in the table to the below. Make sure the insides of the pipes are clean and do not
contain any harmful contaminants such as sulfuric compounds, oxidants, debris,
or dust.
Warning:
When installing or relocating, or servicing the air conditioner, use only the
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with any other refrigerant and do not allow air to remain in the lines.
If air is mixed with the refrigerant, then it can be the cause of abnormal high
pressure in the refrigerant line, and may result in an explosion and other hazards.
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mechanical failure or system malfunction or unit breakdown. In the worst
case, this could lead to a serious impediment to securing product safety.
Liquid pipe 1/4" (ø6.35) thickness 1/32" (0.8)
Gas pipe 1/2" (ø12.7) thickness 1/32" (0.8)
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D
• Apply thin layer of refrigerant oil to pipe and joint seating surface before tighten-
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• Use 2 wrenches to tighten piping connections.
• Use refrigerant piping insulation provided to insulate indoor unit connections.
Insulate carefully.
Flare nut O.D.
Tightening
Liquid pipe Gas pipe
torque
(mm, inch) (mm, inch)
(N·m, ft·lbs)
49 - 61 17 26
35 - 44 43/64 1-7/64
in. (mm)
P006, P008, P012, P015
C
A Liquid pipe
B Gas pipe
C Insulation
B
D Taping
A
Fig. 3-3
o not mix it
tem will cause
en
4