Carrier 53QPCT18H-708F Installation Manual page 39

CONNECTING REFRIGERANT PIPING LINES (Cont.)
16-15 REFRIGERANT LEAK CHECK
After connecting the refrigerant piping lines with both outdoor and
indoor units check the joints for refrigerant leakage by using one
of the following methods :
(1) Soapy water method
Apply a soapy water or a liquid detergent on the indoor unit
connections or outdoor unit connections by a soft brush to
check for leakage of the connecting points of the piping.
If bubbles come out, the pipes have leakage and must be
repaired.
(2) Refrigerant leak detector method
Use the leak detector to check for leakage.
16-16 INSULATING REFRIGERANT PIPING LINES
To conserve energy and prevent wet floors due to
condensation, the gas and liquid piping lines must be well
insulated with a proper insulation material.
The thickness of the insulation should be a minimum of 9 mm.
The insulation you select must have good insulation
characteristic, be easy to use, resist age and not easily absorb
moisture.
Finally wrap the flare couplings and pipes with insulation and
tighten this with tape without exerting too much pressure on
the insulation.
CAUTION
• After a pipe has been insulated, never try to bend it into a
narrow curve, as this way will cause the pipe to break or
crack.
• Repair and cover any possible cracks in the insulation
Avoid dripping due to insufficient insulation of piping.
•
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Fastening tape
Pipe
Insulation
Pipe