Precaution On Installation - Chigo CCB-18HR1 Technical Manual

R410A50Hz Universal Outdoor Series Technical Manual

1.Precaution on Installation

1.1. 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.
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
Φ6.4
Φ9.5
Φ12.7
Φ15.9
Φ19.1
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.
1.2. 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.
1.3. Connect the pipes.
1.4. 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.
1.5. Be sure of no leakage by checking it with leak detector or soap water.
1.6. 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.
145
Tightening torque
15～16N.m
(153～163 kgf.cm)
25～26N.m
(255～265kgf.cm)
35～36N.m
(357～367kgf.cm)
45～47N.m
(459～480 kgf.cm)
65～67N.m
(663～684kgf.cm)
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
GD Chigo Heating & Ventilation Equipment Co., Ltd.
Installation
Flare shape