Omega WM 09K Service Manual page 42

For Cassette and Duct type

The drain pipe of indoor unit must have the
heat insulation , or it will condense dew, as
well as the connections of the indoor unit.

The declivity of the drain pipe downwards
should not be over 1/100, and no winding and
bending.

The total length of the drain pipe when pulled
out traversely shall not exceed 20m , when the
pipe is over long, a prop stand must be
installed every 1.5 to 2m to prevent winding.

Refer to the following figures about the
installation of the pipes.

Do not impose any pressure on the connection
part of the drainage pipe.
1 .5m~2m
Suppor t
L ean Dow nw ar d o ve r 1/100
As long as poss ib le a bou t (10 mm )
10.2.8 Electronic connections of outdoor unit
1. Take the cover away.
2. Connect the cable wires to the terminal board
using the same numbering as in the indoor unit.
3. For the electrical connections, see the wiring
diagram on the back of the cover
4. Fasten the cables with a cable-clamp.
5. An efficient earth connection must be ensured.
6. Replace the covers.
Wiring diagram on the back of the cover
Outdoor unit
10.2.9 Connecting the pipe of outdoor unit
Screw the flare nuts to the outdoor unit coupling
with the same tightening procedures described for
the indoor unit.
Note: If the tightening torque is not sufficient, there
will probably be some leakage. With excessive
Air Conditioner Service Manual
Be nd
Up and Dow n
F old
Le an Do w nwa r d
VP30
over 1/10 0
Screw
Remove the upper cover
tightening torque there will also be some leakage,
as the flange could be damaged.
connection pipes
flare nuts
liquid tap
gas tap
indoor unit
gas valve
service port nut
10.2.10 Bleeding
Air and humidity left inside the refrigerant circuit can
cause compressor malfunction. After having
connected the indoor and outdoor units, bleed the
air and humidity from the refrigerant circuit by using
a vacuum pump.
The air and humidity left inside the refrigerant
circulation can cause compressor malfunction.
After having connected the indoor and outdoor
units, bleed the air and humidity from the
refrigerant circulation using a vacuum pump.
Notice
According to installation conditions, overlarge
wrenched Torch will destroy the nut. (Unit. N.cm)
Pipe Tightening
torque(N.M)
1/4'' 15-20
3/8'' 31-35
1/2'' 35-45
5/8'' 75-80
Liquid valve
tap
protection caps
41