Outdoor Unit Installation - Mitsubishi Electric MSZ-AS90VGD Installation Manual

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
3) Firmly tighten the terminal screws to prevent them from loosening. After tightening,
4) Connect power supply cord (K).
5) Fix indoor/outdoor unit connecting wire (A) and power supply cord (K) with the cord clamp.
6) Close the service panel securely.
15 mm
35 mm
Lead wire
Cord clamp
Indoor/outdoor
unit connecting
wire (A)
This unit has demand response capability which is compliant with AS/NZS 4755.3.1.
electric supply company, then this unit should be connected to Demand response en-
abling devise (DRED). For further information, consult your dealer. This unit supports
3 Demand Response Modes (DRMs): DRM1, DRM2 and DRM3.
• To prevent malfunction caused by noise, route the cord connecting this unit to
DRED and the power supply cord as parallel as possible.
power supply.
• Do not pull, extremely bend or apply strong pressure on the wire to prevent failure.
• Do not screw DRED to outdoor unit.
• Do not put DRED in outdoor unit.
• Secure electrical wiring above clamp.
• Do not get DRED wire caught in the service panel.
This unit has demand response capability which is compliant with AS/NZS 4755.3.1.
electric supply company, then this unit should be connected to Demand response en-
abling devise (DRED). For further information, consult your dealer. This unit supports
3 Demand Response Modes (DRMs): DRM1, DRM2 and DRM3.
• To prevent malfunction caused by noise, route the cord connecting this unit to
DRED and the power supply cord as parallel as possible.
power supply.
• Do not pull, extremely bend or apply strong pressure on the wire to prevent failure.
• Do not screw DRED to outdoor unit.
• Do not put DRED in outdoor unit.
• Secure electrical wiring above clamp.
• Do not get DRED wire caught in the service panel.
• For future servicing, give extra length to the connecting wires.
• Be sure to attach each screw to its correspondent terminal when securing the cord
Power supply cord (K)
1 2 3 C
AS/NZS4755
1 : DRM 1
2 : DRM 2
3 : DRM 3
C : COMMON
Wire saddle
Cable strap
The tip should be
pointed to the left side.
Power supply
cord (K)
CAUTION
CAUTION
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 section
of pipe. (Fig. 3)
• Put the end of the copper pipe to downward direction
as you remove burrs in order to avoid to let burrs drop
in the piping.
then put them on pipe having completed burr removal.
dimension shown in the table. Select A mm from the
table according to the tool you use.
Copper pipe
Burr
Spare reamer
Pipe cutter
Fig. 3
Copper pipe
Die
Flare nut
Fig. 5
Pipe diameter Nut
Clutch type
(mm) (mm)
tool for
R32,R410A
ø 6.35 (1/4") 17
ø 9.52 (3/8") 22
0 to 0.5
ø12.7 (1/2") 26
ø15.88 (5/8") 29
3-3. PIPE CONNECTION
age.
• Be sure to wrap insulation around the piping. Direct contact with the bare piping may result
in burns or frostbite.
Indoor unit connection
complete all brazing prior to connecting indoor unit to outdoor unit.
Outdoor unit connection
Connect pipes to stop valve pipe joint of the outdoor unit in the
same manner applied for indoor unit.
WARNING
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, 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 temperature
and humidity are high, wind additional commercially sold insulation to prevent condensa-
tion.
Copper
pipe
Fig. 1
No good
Good
Tilted Uneven Burred
Fig. 2
Flaring tool
Clutch type Wing nut type
Fig. 4
Inside is shin-
ing without any
Smooth all
scratches.
around
Even length
all around
Fig. 6
A (mm)
Clutch type Wing nut
tool type tool N•m
for R22 for R22
13.7 to 17.7 140 to 180
1.5 to 2.0
34.3 to 41.2 350 to 420
1.0 to 1.5
49.0 to 56.4 500 to 575
2.0 to 2.5
73.5 to 78.4 750 to 800
WARNING