Optional Accessories - Haier MRV5-H Service Manual

The high-pressure gas pipe, suction gas pipe, liquid pipe must be provided with reliable thermal insulation. In the
absence of thermal insulation, liquid leakage may happen.
The outdoor unit is already filled with refrigerant.
To connect the pipes to valve box or remove them from valve box, do use both spanner and torque wrench, as
shown in the Fig.6.
Apply refrigerant oil to outside of the flare. Screw it for 3 to 4 rounds with hands and then tighten it.
Determine the tightening torque. (Excessive tightening may damage the nuts and hence cause leakage)
Check the connecting pipes for gas leakage and then fix the thermal insulation, as shown in the in the Fig.7.
Only use sealing gasket to wrap the part jointing between the gas pipe and thermal insulation.
For pipe cutter and flare tool, please use R410A special tools.
Paste the refrigerant oil here
Torque spanner
Pipe joint
Cone nut
Fig.6
<Notes>
Please do not let any type of gas other than the specified refrigerant go into the refrigeration system;
In case of refrigerant leakage during operation, please replace the gas. (Fill the refrigerant at the outdoor unit)
Select piping material
• Make sure both the internal surface and external surface of the pipes are intact and are free from harmful
contaminants such as sulphur, oxide, foreign matter, cutting powder, grease and water.
• Please use the following materials for refrigerant pipe.
Pipe material
Model
High pressure gas pipe
Suction gas pipe
Function Liquid pipe (outdoor side)
Gas pipe (indoor side)
Liquid pipe (indoor side)
Middle size seal cushion (accessory)
(Use seal cushion to bind the pipe joint)
Spanner
Heat insulation (accessory)
(for liquid pipe)
Liquid pipe
Gas pipe
Phosphorized copper seamless pipe for air conditioner (TP2)
VP4-450B
1-1/8" (28.58)
1-1/8" (28.58)
5/8"(15.88)
5/8"(15.88)
249
Heat insulation (accessory)
(for gas pipe)
Fig.7
3/8 (9.52)