LCAC R32 Series
78
Service manual
9. ENGINEERING OF INSULATION
9.1 INSULATION OF REFRIGERANT PIPE
9.1.1 Operational procedure of refrigerant pipe insulation
Cut the suitable pipe
insulation (except joint section)
flare the pipe
piping layout and connection
vacuum drying
insulate the joint parts
9.1.2 Purpose of refrigerant pipe insulation
• During operation, temperature of gas pipe and liquid pipe shall be over-heating or over-cooling extremely.
Therefore, it is necessary to carry out insulation; otherwise it shall debase the performance of unit and burn
compressor.
• Gas pipe temperature is very low during cooling. If insulation is not enough, it shall form dew and cause leakage.
• Temperature of gas pipe is very high (generally 50-100°C) during heating. Insulation work must be carried out to
prevent hurt by carelessness touching.
9.1.3 Insulation material selection for refrigerant pipe
• The burning performance should over 120°C
• According to the local law to choose insulation materials
• The thickness of insulation layer shall be above 10mm.If in hot or wet environment place, the layer of insulation
should be thicker accordingly.
9.1.4 Installation highlights of insulation construction
• Gas pipe and liquid pipe shall be insulated separately, if the gas pipe and liquid pipe were insulated together; it
will decrease the performance of air conditioner.
Liquid pipe
Insulation meterial
Gas pipe
• The insulation material at the joint pipe shall be 5~10cm longer than the gap of the insulation material.
• The insulation material at the joint pipe shall be inserted into the gap of the insulation material.
• The insulation material at the joint pipe shall be banded to the gap pipe and liquid pipe tightly.
• The linking part should be use glue to paste together
• Be sure not bind the insulation material over-tight, it may extrude out the air in the material to cause bad
insulation and cause easy aging of the material.
9.2 INSULATION OF DRAINAGE PIPE
9.2.1 Operational procedure of refrigerant pipe insulation
Select the suitable pipe
insulation (except joint section)
piping layout and connection
drainage test
insulate the joint parts
PART 4. INSTALLATION
Содержание J100Wi
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