Refrigerant Pipe; Mounting The Indoor Unit - Mitsubishi Electric PKFY-P VGM-E Installationshandbuch

3. Installing the indoor unit
a
A
b
Fig. 3-6
B
Fig. 3-7
A
Fig. 3-8

4. Refrigerant pipe

A
45°±2°
Fig. 4-1
B Refrigerant pipe sizes & Flare nut tightening torque
Liquid pipe
Tightening
Pipe size
(mm)
P20/25/32/40 ODø6.35 (1/4")
ODø9.52 (3/8")
P50
P63/80 ODø9.52 (3/8")
P100/125 ODø9.52 (3/8")
* Use the provided flare nut for the following pipes: Liquid pipe of P50, P100, P125, and gas pipe of P50.
4
b
B
a
C
A
B
A
(mm)
B
C
A
B
C
B
R407C or R22
Gas pipe
Tightening
Pipe size
torque torque
(mm)
(N.m) (N.m)
14 - 18 ODø12.7 (1/2") 49 - 61
34 - 42* ODø15.88 (5/8") 68 - 82*
34 - 42 ODø15.88 (5/8") 68 - 82
34 - 42 ODø19.05 (3/4") 100 - 120*
Left and left rear piping (Fig. 3-6)
1. Remove the under cover.
• Remove the under cover by sliding it towards the rear of the unit b, while at the
same time, pressing the two points marked by arrow heads a.
2. Remove the corner box and knock out the knockout holes as necessary.

3.4. Mounting the indoor unit

1. Affix the mounting plate to the wall.
2. Hang the indoor unit on the two hooks positioned on the upper part of the mount-
ing plate.
Rear, right and lower piping (Fig. 3-7)
3. Affix the indoor unit.
4. After connecting the pipes, put the corner box back to where it was (follow the
removal steps backwards).
A Square hole
B Hooks
Left and left rear piping (Fig. 3-8)
3. Cut out a mounting piece from the packaging material.
4. Pull the indoor unit up towards yourself as shown in the figure below and slide the
mounting piece in to the mounting plate using the mounting piece setting marks
as reference.
5. After connecting the pipes and wiring, put the under cover back to where it was,
and remove the mounting piece and affix the indoor unit as shown in the left
figure.
6. Put the corner box back to where it was.
A Mounting piece
B Ceiling
C Rib
4.1. Connecting pipes (Fig. 4-1)
• When commercially available copper pipes are used, wrap liquid and gas pipes
with commercially available insulation materials (heat-resistant to 100 °C or more,
thickness of 12 mm or more).
• The indoor parts of the drain pipe should be wrapped with polyethylene foam insu-
lation materials (specific gravity of 0.03, thickness of 9 mm or more).
• Apply thin layer of refrigerant oil to pipe and joint seating surface before tightening
flare nut.
• Use two wrenches to tighten piping connections.
• Use refrigerant piping insulation provided to insulate indoor unit connections. Insu-
late carefully.
A Flare cutting dimensions
Copper pipe O.D.
(mm) øA dimensions (mm)
ø6.35
ø9.52
ø12.7
ø15.88
ø19.05
R410A
Liquid pipe
Tightening
Pipe size Pipe size
torque
(mm)
(N.m)
ODø6.35 (1/4") 14 - 18 ODø12.7 (1/2")
ODø6.35 (1/4") 34 - 42 ODø12.7 (1/2")
ODø9.52 (3/8") 34 - 42 ODø15.88 (5/8")
ODø9.52 (3/8") 34 - 42 ODø15.88 (5/8")
C Apply refrigerating machine oil over the entire flare seat surface.
Flare dimensions
8.7 - 9.1
12.8 - 13.2
16.2 - 16.6
19.3 - 19.7
22.9 - 23.3
Flare nut O.D.
Gas pipe
Tightening Liquid
torque
pipe
(mm)
(N.m) (mm)
49 - 61 17
68 - 82
22
68 - 82 22
100 - 120 22
Gas
pipe
(mm)
26
29
29
36