Installation Diagram; Indoor Unit Installation; Pipe Forming And Drain Piping - Mitsubishi Electric MSZ-HC25VA Installation Manual

1-4. INSTALLATION DIAGRAM

ACCESSORIES
Check the following parts before installation.
<Indoor unit>
(1) Installation plate
Installation plate fixing screw
(2)
4 × 25 mm
(3) Battery (AAA) for (4)
(4) Wireless remote controller
Felt tape
(5)
(For left or left-rear piping)
<Outdoor unit>
(6) Drain socket
PARTS TO BE PROVIDED
AT YOUR SITE
(A) Indoor/outdoor unit connecting wire*
(B) Extension pipe
(C) Wall hole sleeve
(D) Wall hole cover
(E) Pipe fixing band
(F) Fixing screw for (E) 4 x 20 mm
(G) Piping tape
(H) Putty
Drain hose
(I) (or soft PVC hose, 15 mm inner
dia. or hard PVC pipe VP16)
(J) Refrigeration oil
(K) Power supply cord*
* Note:
Place indoor/outdoor unit connecting wire (A)
and power supply cord (K) at least 1 m away
from the TV antenna wire.
Units should be installed by licensed contractor
according to local code requirements.

2. INDOOR UNIT INSTALLATION

2-1. FIXING OF INSTALLATION PLATE
• Find a structural material (such as a stud) in the wall and fix installation plate (1) hori-
zontally with fixing screws (2).
• To prevent installation plate (1) from vibrating, be sure to install the fixing screws in
the holes indicated in the illustration. For added support, fixing screws may also be
installed in other holes.
• When bolts recessed in the concrete wall are to be utilized, secure installation plate (1)
using 11 × 20 · 11 × 26 oval hole (450 mm pitch).
• If the recessed bolt is too long, change it for a shorter one available in the market.
2-2. WALL HOLE DRILLING
1) Determine the wall hole position.
2) Drill a dia. 65 mm hole. The outdoor side should be 5 to
7 mm lower than the indoor side.
3) Insert wall hole sleeve (C).
Bind the line to the center hole.
Installation plate (1)
Level
80 mm or
more
Wall
Fixing screw (2) Align the plumb
line with the
mark .
2-3. CONNECTING WIRES FOR INDOOR UNIT
You can connect indoor/outdoor lead wire without removing the front panel.
1) Open the front panel.
2) Remove VA clamp.
3) Pass indoor/outdoor unit connecting wire (A) from the back of the indoor unit and proc-
ess the end of the wire.
4) Loosen terminal screw, and connect first the earth wire, then indoor/outdoor unit con-
necting wire (A) to the terminal block. Be careful not to make mis-wiring. Fix the wire
to the terminal block securely so that no part of its core is appeared, and no external
force is conveyed to the connecting section of the terminal block.
1
5
2
1
1
1
1
1
1
1
2 to 5
2 to 5
1
1
1 or 2
1
1
Open two sides of
left, right, or rear
side.
Wall
Ceiling
63 mm or more
115 mm or more for left and left
back piping (using spacer)
80 mm or
more
Insert
Align the Center of dia.
the
scale with 65 mm hole
scale. *
the line. *
Plumb
* Same for left hole.
Be sure to use wall hole
sleeve (C) to prevent
indoor/outdoor connecting
wire (A) from contacting
metal parts in the wall and
to prevent damage by
rodents in case the wall is
hollow.
After the leak test, apply
insulating material tightly
so that there is no gap.
When the piping is to be
attached to a wall contain-
ing metals (tin plated) or
metal netting, use a chemi-
cally treated wooden piece
20 mm or thicker between
the wall and the piping or
wrap 7 to 8 turns of insula-
tion vinyl tape around the
piping.
To use existing piping,
perform COOL operation
for 30 minutes and pump
Basically open 100
down before removing
mm or more without
any obstruction in
the old air conditioner.
front and on both
Remake flare according
sides of the unit.
to the dimension for new
refrigerant.
Drain piping for outdoor unit
• Provide drain piping before indoor
and outdoor piping connection.
• Connect drain hose (I) I.D.15mm
as shown in the illustration.
• Make sure to provide drain pip-
ing with a downhill grade for easy
drain flow.
Note:
Do not use drain socket (6) in cold
regions. Drain may freeze and make
the fan stop.
5) Firmly tighten the terminal screws to prevent them from loosening. After tightening, pull
the wires lightly to confirm that they do not move.
6) Secure indoor/outdoor unit connecting wire (A) and the earth wire with the VA clamp.
Never fail to hook the left claw of the VA clamp. Attach the VA clamp securely.
Outdoor
side
Lead wire
• Make earth wire a little longer than
Wall
others. (More than 60 mm)
• For future servicing, give extra length
to the connecting wires.

2-4. PIPE FORMING AND DRAIN PIPING

Pipe Forming
• Place the drain hose below the refrigerant piping.
• Make sure that the drain hose is not heaved or snaked.
• Do not pull the hose when applying the tape.
• When the drain hose passes the room, be sure to wrap
insulation material (obtainable at a store) around it.
Wall hole cover (D)
Indoor unit
Wall hole
sleeve (C)
Cut off the
extra length.
Outdoor unit installation
Air inlet
Air outlet
4-10 mm × 16 mm slot
Terminal block
Indoor/outdoor unit con-
necting wire (A)
Indoor terminal block
Outdoor terminal block
Seal the wall hole
gap with putty (H).
Fix the pipe to wall
with pipe fixing
band (E).
Pipe fixing band
(E)
Fixing screw
(F)
(6) (I)
VA clamp
Fixing screw
Earth wire
(green/yellow)
Indoor/outdoor unit
connecting wire (A)
Liquid pipe
Gas pipe
Indoor/outdoor unit
connecting wire (A)
Felt tape (5)
Piping tape (G)