Precaution On Installation - Kaisai KOU-12HDN1 Service Manual

MLCAC-UTSM-2010-10

1. Precaution on Installation

1). Measure the necessary length of the connecting pipe, and make it by the following way.
a. Connect the indoor unit at first, then the outdoor unit.
Bend the tubing in proper way. Do not harm them.
Specially Notice the pipe length/height/dimension of each capacity.
Maximum pipe length
Model
12,000Btu/h
18,000Btu/h ~24,000Btu/h
30,000Btu/h
36,000Btu/h
48,000Btu/h~60,000Btu/h
Piping sizes
Model
12,000Btu/h~18,000Btu/h
24,000Btu/h~60,000Btu/h
CAUTIONS

Daub the surfaces of the flare pipe and the joint nuts with frozen oil, and wrench it for 3~4 rounds

With hands before fasten the flare nuts.

Be sure to use two wrenches simultaneously when you connect or disconnect the pipes.
Pipe gauge Tightening torque
14.2～17.2N.m
Φ6.4
(144～176 kgf.cm)
32.7～39.9N.m
Φ9.5
(333～407kgf.cm)
49.5～60.3N.m
Φ12.7
(504～616kgf.cm)
61.8～75.4N.m
Φ15.9
(630～770 kgf.cm)
97.2～118.6N.m
Φ19.1
(990～1210kgf.cm)
b. The stop value of the outdoor unit should be closed absolutely (as original state). Every time you connect it, first loosen the nuts at the part
of stop value, then connect the flare pipe immediately (in 5 minutes). If the nuts have been loosened for a long time, dusts and other
impurities may enter the pipe system and may cause malfunction later. So please expel the air out of the pipe with refrigerant before
connection.
c. Expel the air after connecting the refrigerant pipe with the indoor unit and the outdoor unit. Then fasten the nuts at the repair-points.
2) Locate The Pipe
a. Drill a hole in the wall (suitable just for the size of the wall conduit), then set on the fittings such as the wall conduit and its cover.
b. Bind the connecting pipe and the cables together tightly with binding tapes. Do not let air in, which will cause water leakage by
condensation.
c. Pass the bound connecting pipe through the wall conduit from outside. Be careful of the pipe allocation to do no damage to the tubing.
3) Connect the pipes.
4) Then, open the stem of stop values of the outdoor unit to make the refrigerant pipe connecting the indoor unit with the outdoor unit in
fluent flow.
5) Be sure of no leakage by checking it with leak detector or soap water.
6) Cover the joint of the connecting pipe to the indoor unit with the soundproof / insulating sheath (fittings), and bind it well with the tapes to
prevent leakage.
Installation
Max. Length
10m
25m
25m
30m
50m
Liquid(mm)
6.4
9.5
Flare dimension A
Min (mm) Max
8.3 8.7
12.0 12.4
15.4 15.8
18.6 19.1
22.9 23.3
Precaution on Installation
Max. Elevation
5m
12m
15m
20m
25m
Gas(mm)
12.7
15.9
Flare shape
125