Mitsubishi Electric PSA-RP71GA Manuel D'installation page 5

4. Installing the refrigerant piping
A
45°±2°
Apply refrigerating machine oil over the entire flare seat surface.
Fig. 4-1
A Flare cutting dimensions
Copper pipe O.D. Flare dimensions
(mm) øA dimensions (mm)
ø6.35
ø9.52 12.6 - 13.0
ø12.7 15.8 - 16.2
ø15.88 19.0 - 19.4
ø19.05 22.9 - 23.3
B Flare nut tightening torque
Copper pipe O.D. Tightening torque
(mm)
ø6.35
ø9.52
ø12.7
ø15.88
ø19.05 100 - 140
A
A
B
Fig. 4-2
Copper pipe O.D.
Flare tool for R22·R407C
(mm)
ø6.35 (1/4")
ø9.52 (3/8")
ø12.7 (1/2")
ø15.88 (5/8")
ø19.05 (3/4")
227
(120)
160
a
c
20
e
b
d
218 95
h
f
95
22 461
g
i
j
47
20 105
600
l
Fig. 4-3
B
Be sure to only use the flare nuts that
came with the unit.
8.6 - 9.0
Tightening angle
(N·m) (Guideline)
14 - 18 60˚ - 90˚
35 - 42 60˚ - 90˚
50 - 58 30˚ - 60˚
75 - 80 30˚ - 60˚
20˚ - 35˚
A Die
B Copper pipe
A (mm)
Flare tool for R410A
Clutch type
0 - 0.5 1.0 - 1.5
0 - 0.5 1.0 - 1.5
0 - 0.5 1.0 - 1.5
0 - 0.5 1.0 - 1.5
0 - 0.5 1.0 - 1.5
40 66
(261)
186
k
m
70
(260)
180
4.2. Indoor unit (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 leak detector or soapy water to check for gas leaks after connections are
completed.
• Use refrigerant piping insulation provided to insulate indoor unit connections. Insu-
late carefully following shown below.
• Use correct flare nuts meeting the pipe size of the outdoor unit.
Available pipe size
RP35, 50
ø6.35
Liquid side
ø9.52
ø12.7
Gas side ø15.88
P25
ø6.35
Liquid side
ø12.7
Gas side
: Factory flare nut attachment to the heat-exchanger.
4.3. Refrigerant and drainage pipe locations (Fig. 4-3)
(mm)
Dimensions in parentheses are for Models PSH/PSA-100, 125, 140.
Where knockout holes are indicated, use a saw blade to cut along the groove.
Do not cut the hole larger than the indicated groove.
a Rear surface
b Front surface
c Knockout hole for mounting: 4-10 mm diameter hole
d * knockout hole for connections under the unit
e 120 × 70 knockout hole for connections under the unit
f Indoor/outdoor unit connecting terminals
g Power supply terminals for Electric heater
h Electrical equipment box
I Liquid pipe
j Gas pipe
k Drain pipe outlet diameter ø26 <PVC pipe VP20 connection>
l 140 × 80
Knockout hole for refrigerant and drainage piping and electrical wiring
m 90 × 60
Knockout hole for refrigerant and drainage piping
n 27 mm diameter knockout hole for electrical wiring (there is a similar hole on the left side)
n
RP60 RP71
ø6.35 –
ø9.52 ø9.52
– –
ø15.88 ø15.88
– – –
P35, 50, 60, 71 P100, 125, 140
– –
– ø9.52 ø9.52
– –
– ø15.88 –
– – ø19.05
RP100, 125, 140
–
ø9.52
–
ø15.88
ø19.05
5