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1. Refrigerant pipe 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.
Tubing size
Torque
6.35 1420~1720N.cm(144~176kgf.cm)
9.52 3270~3990N.cm(333~407kgf.cm)
12.7 4950~6030N.cm(504~616kgf.cm)
16 6180~7540N.cm(630~770kgf.cm)
19 9720~11860N.cm(990~12106kgf.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.
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.
Summary of Contents for YOHC 12
Page 7: ...Part 2 Indoor units Ceiling Floor Type ...
Page 17: ...4 Service space 600mm 600mm ...
Page 20: ...6 1 3 YOKC 24 6 1 4 YOKC 30 ...
Page 21: ...6 1 5 YOKC 36 6 1 6 YOKC 48 YOKC 60 ...
Page 30: ...Discharge angle 60 FLOOR Airflow velocity Temperature ...
Page 37: ...Part 3 Outdoor Units Outdoor Units ...
Page 39: ...1 Dimensions 1 1 YOJC 12 290 315 285 530 62 590 750 110 1 2 YOJC 18 12 5 ...
Page 40: ...1 3 YOJC 24 330 62 895 860 590 141 1 4 YOJC 30 YOJC 36 ...
Page 41: ...1 5 YOJC 48 YOJC 60 ...
Page 43: ...3 Wiring diagrams 3 1 Cooling Heating 3 1 1 YOJC 12 3 1 2 YOJC 18 ...
Page 46: ...4 Field Wiring ...
Page 49: ...7 Sound levels 1m Microphone 12000btu h 18000btu h ...
Page 50: ...24000btu h 3000btu h 36000btu h 48000btu h 60000btu h ...
Page 66: ...Part 4 Installation Installation ...
Page 75: ...www johnsoncontrols com SM YOHC 12 60GB 03 07 ...