Outdoor Unit Installation - Mitsubishi Electric MSZ-GC22VA Installation Manual

Rear, right, or downward piping
1) Put the refrigerant piping and the drain hose
together, then firmly apply piping tape (G)
from the end.
2) Insert the piping and the drain hose into the
wall hole sleeve (C), and hook the upper part
of the indoor unit on the installation plate (1).
3) Check if the indoor unit is hooked securely on the installation plate (1) by moving
the unit to left and right.
4) Thrust the lower part of the indoor unit into the installation plate (1).
Drain Piping
mercially sold insulation.
• If the drain hose provided with the indoor unit is too short, connect it with drain hose (I)
that should be provided at your site. (Fig. 2)
• When connecting the drain hose to the hard vinyl chloride pipe, be sure to insert it
securely into the pipe. (Fig. 3)
Drain
hose
Downward
slope
Soft hose
I.D. 15 mm
Fig. 1 Fig. 2
Do not make drain piping as shown below.
Accumulated
Do not raise
drain water
Water Water
Waving
leakage leakage

3. OUTDOOR UNIT INSTALLATION

3-1. CONNECTING WIRES FOR OUTDOOR UNIT
1) Open the service panel.
2) Loosen terminal screw, and connect indoor/outdoor unit connecting wire (A) from
the wire to the terminal block securely so that no part of its core is appeared, and no
3) Firmly tighten the terminal screws to prevent them from loosening. After tightening,
4) Connect power supply cord (K).
clamp.
6) Close the service panel securely.
Terminal block
Lead wire
3-2. FLARING WORK
1) Cut the copper pipe correctly with pipe cutter.
(Fig. 1, 2)
2) Completely remove all burrs from the cut cross sec-
tion of pipe. (Fig. 3)
• Put the end of the copper pipe to downward direc-
tion as you remove burrs in order to avoid to let
burrs drop in the piping.
3) Remove flare nuts attached to indoor and outdoor
units, then put them on pipe having completed burr
removal. (Not possible to put them on after flaring
work.)
4) Flaring work (Fig. 4, 5). Firmly hold copper pipe in
the dimension shown in the table. Select A mm from
the table according to the tool you use.
5) Check
again.
Copper pipe
Burr
Spare reamer
Pipe cutter
Fig. 3
Cut off in case of
right piping.
Cut off in case of
downward piping.
Drain hose
Hard vinyl chloride
70 cm or
pipe I.D. 30 mm
more
Insert
securely
Different
diameter joint
Fig. 3
Tip of drain
hose dipped
Air
in water
Water
Ditch
leakage
• Make earth wire a little longer
than others. (More than 35 mm)
length to the connecting wires.
Power supply cord (K)
Cord clamp
Copper
pipe
No good
Good
Tilted Uneven Burred
Flaring tool
Clutch type Wing nut type
Fig. 4
Left or left-rear piping
Note:
Be sure to reattach the drain
hose and the drain cap in case
of left or left-rear piping.
Otherwise, it could cause drops
of water to drip down from the
drain hose.
1) Put the refrigerant piping and the drain hose together,
Felt tape (7) overlap width should be 1/3 the tape
width. Use a bandage stopper at the end of felt tape (7).
-
2) Pull out the drain cap at the rear right of the indoor unit.
(Fig. 1)
drain cap.
3) Pull out the drain hose at the rear left of the indoor unit.
(Fig. 2)
• Hold the claw marked by the arrows and pull out the
drain hose forward.
4) Put the drain cap into the section to which the drain
hose is to be attached at the rear of the indoor unit.
(Fig. 3)
• Insert not sharp-edged tools such as screwdrivers
into the hole at the end of the cap and insert the cap
fully into the drain pan.
5) Insert the drain hose fully into the drain pan at the rear
right of the indoor unit. (Fig. 4)
• Check if the hose is hooked securely to the projec-
tion of its inserting part at the drain pan.
6) Insert the drain hose into wall hole sleeve (C), and
hook the upper part of indoor unit on installation plate
(1). Then, move the indoor unit completely to the left in
order to make placing the piping in the back space of
At least
50 mm
the unit easier.
gap
it up, hook it onto the back rib, and use it as a spacer
to lift the indoor unit. (Fig. 5)
9) Thrust the lower part of the indoor unit into the installation plate (1).
Die
Flare nut
Pipe diameter
(mm) (mm)
ø 6.35 (1/4")
ø 9.52 (3/8")
ø12.7 (1/2")
ø15.88 (5/8")
3-3. PIPE CONNECTION
leakage.
Indoor unit connection
Connect both liquid and gas pipings to indoor unit.
• Apply a thin coat of refrigeration oil (J) on the seat surface of pipe.
• Use tightening torque table below as a guideline for indoor unit side union joint section,
Fig. 1
Outdoor unit connection
Connect pipes to stop valve pipe joint of the outdoor unit in the
same manner applied for indoor unit.
• For tightening, use a torque wrench or spanner and use the
same tightening torque applied for indoor unit.
3-4. INSULATION AND TAPING
1) Cover piping joints with pipe cover.
Fig. 2
2) For outdoor unit side, surely insulate every piping including
valves.
3) Using piping tape (G), apply taping starting from the entry of outdoor unit.
• Stop the end of piping tape (G) with tape (with adhesive agent attached).
• When piping have to be arranged through above ceiling, closet or where the tempera-
ture and humidity are high, wind additional commercially sold insulation to prevent
condensation.
Piping tape (G)
Felt tape (7)
Smooth all
around
Copper pipe
Even length
Fig. 5 all around
A (mm)
Nut
Clutch type Clutch type Wing nut
tool tool type tool
for R410A for R22 for R22
17
1.5 to 2.0
22
0 to 0.5 1.0 to 1.5
26
2.0 to 2.5
29
Cut off in case of left
piping.
Drain cap
Drain cap
Fig. 1
Drain hose
Fig. 2
Drain cap
Fig. 3
Drain hose
Fig. 4
Fig. 5
Inside is shin-
ing without any
scratches.
Fig. 6
Tightening torque
N•m kgf•cm
13.7 to 17.7 140 to 180
34.3 to 41.2 350 to 420
49.0 to 56.4 500 to 575
73.5 to 78.4 750 to 800