Outdoor Unit Installation - Mitsubishi Electric MSZ-GS30 Installation Manual

3. OUTDOOR UNIT INSTALLATION

3-1. CONNECTING WIRES FOR OUTDOOR UNIT
1) Remove the service panel.
2) Remove the conduit cover.
3) Attach the conduit connector to conduit cover with lock nut then secure it against unit
with screws.
4) Connect ground wires of indoor/outdoor unit connecting wire (A) and power supply cord
(K) to the TB support.
5) Loosen the terminal screw, and attach indoor/outdoor unit connecting wire (A) from the
indoor unit correctly on the terminal block. Attach the wire to the terminal block securely
so that its core cannot be seen, and no external force affects the connecting section of
the terminal block.
6) Firmly tighten the terminal screws. After tightening, verify that the wires are tightly fastened.
7) Connect power supply cord (K).
8) Install the conduit cover.
9) Install the service panel securely.
Service panel
Conduit cover
B
Pipe diameter
Clutch
inch
inch (mm)
type tool
(mm)
for R410A
21/32
ø 1/4 (6.35)
(17)
ø 3/8 (9.52) 7/8 (22)
0 to 0.02
(0 to 0.5)
1-1/32
ø 1/2 (12.7)
(26)
1-5/32
ø 5/8 (15.88)
(29)
3-2. FLARE CONNECTION
1) Cut the copper pipe as straight as possible with a pipe cutter. (Fig. 1, 2)
2) Remove all burrs from the cut section of the pipe, ensuring that precautions are taken to
avoid getting metal shavings into the piping. (Fig. 3)
4) Flaring work (Fig. 4, 5). Firmly hold copper pipe in the dimension shown in the table. Select
A inch (mm) from the table according to the tool you use.
5) Check
3-3. PIPE CONNECTION
• Be sure to wrap insulation around the piping. Direct contact with the bare piping may result
in burns or frostbite.
Indoor unit connection
Connect both liquid and gas piping to indoor unit.
ation oil on screw threads. Excessive tightening torque will result in damage on the screw.
• Use tightening torque table above as a guideline for indoor unit side joints, and tighten
Outdoor unit connection
Connect pipes to stop valve pipe joint of the outdoor unit following the same procedure
detailed in Indoor unit connection.
• For tightening, use a torque wrench or spanner.
When installing the unit, securely connect the refrigerant pipes before starting the
compressor.
3-4. INSULATION AND TAPING
1) Cover piping joints with pipe cover.
2) For outdoor unit side, insulate the piping, including valves.
3) Apply piping tape (G) starting from the connection on the outdoor unit.
• When piping has to be installed through a ceiling, closet or where the temperature and
Lock nut
Conduit pipe
Conduit
plate
A inch (mm) Tightening torque
Clutch Wing nut
ft-lb
type tool type tool
(kgf•cm)
for R22 for R22
10 to 13
(140 to 180)
0.06 to 0.08
(1.5 to 2.0)
25 to 30
(350 to 420)
0.04 to 0.06
(1.0 to 1.5)
36 to 42
(500 to 575)
0.08 to 0.10
(2.0 to 2.5)
54 to 58
(750 to 800)
WARNING
1-3/8 in.
(35 mm)
Lead
wire
Terminal block
to conduit cover
Indoor/outdoor unit
connecting wire (A)
N•m
13.7 to 17.7
34.3 to 41.2
49.0 to 56.4
73.5 to 78.4
Clutch type
Smooth all around
Even length
all around
5/8 in.
(15 mm)
Power supply cord (K)
TB support
• Make ground wire a little longer than others.
(More than 1-3/8 in. [35 mm])
• For future servicing, leave some slack in the
connecting wires.
Good
Copper
pipe
Fig. 1
Copper pipe
Burr
Spare reamer
Pipe cutter
Flaring tool
Die
Wing nut type
Flare nut
Fig. 4
Inside is shin-
ing without any
scratches.
Fig. 6
Power supply cord (K)
No good
Tilted Uneven Burred
Fig. 2
Fig. 3
Copper pipe
Fig. 5
B