TCL U-MATCH-R32 Series User Manual

TCL U-MATCH-R32 SERIES DC INVERTER AIR CONDITIONERS SERVICE MANUAL
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2.8 Additional Refrigerant Charge
Note:
●Refrigerant charging must be done after wiring, vacuuming and leak testing.
●Use electronic scale or fluid infusion apparatus to weight refrigerant to be recharged. Be sure to
avoid extra refrigerant charged, it may cause liquid hammer of the compressor or protections.
●Charging with mismatched refrigerant can cause an explosion or an accident. Make sure that a
suitable refrigerant is used.
●The refrigerant container must be opened slowly. Always use guards when charging the system.
●Do not mix refrigerant types. For R32 refrigerant models, when adding refrigerant to the air
conditioner, ensure the safety of the conditions in the area by controlling flammable materials
●Always use gloves and glasses to protect your hands and eyes during the charge work.
●Use supplementing flexible pipe to connect refrigerant cylinder, pressure gauge and outdoor unit.
And The refrigerant should be charged in liquid state. Before recharging, The air in the flexible pipe
and manifold gauge should be exhausted.
●After finished refrigerant recharge process, check whether there is refrigerant leakage at the
connection joint part.(Using gas leakage detector or soap water to detect).
Some systems require additional refrigerant charge depending on the length of the pipe. The
standard pipe length of this air conditioner is 5 meters (16 feet). The following table can be used to
calculate the additional refrigerant to be charged:
Liquid pipe diameter
6.35(1/4")
9.52(3/8")
12.7(1/2")
Additional charge for 1m/ft (R32)
12g/0.13oZ
24g/0.26oZ
40g/0.42oZ
2.9 Engineering of Insulation
2.9.1 Insulation of Refrigerant Pipe
2.9.1.1 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
2.9.1.2 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℃) during heating. Insulation work must
be carried out to prevent hurt by carelessness touching.
2.9.1.3 Insulation Material Selection for Refrigerant Pipe
➢ The burning performance should over 120℃
➢ 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.
2.9.1.4 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.

TCL U-MATCH-R32 Series Specifications

General

Brand	TCL
Model	U-MATCH-R32 Series
Category	Air Conditioner
Language	English