Haier AB072MRERA - Page 403

395
Constant Air Volume Duct
Type Indoor Unit (AD*MQERA)
12. Refrigerant Tube
Tubing Permissible Length & Height Difference
Piping Materials & Heat Insulating Materials
Please refer to the attached manual of outdoor units.
As to prevent condensation, heat insulating treatment
should be performed. The heat insulating treatment
for gas and liquid piping should be done respectively.
Piping
Material
Hard PVC tube
VP25mm(inner bore)
Heat Insulating
Material
Vesicant polythene
thickness: over 7mm
Tubing Materials & Specications
Refrigerant Filling Amount
Connecting Procedures of Refrigerant Tubing
Add the refrigerant according to the installation instruction of outdoor unit. The addition of R410A refrigerant must
be performed with a measure gage to ensure the specied amount or compressor failure can be caused by lling
too much or little refrigerant.
Proceed the are tube connecting operation to connect all the refrigerant tubes.
• Dual wrenches must be used in the connection of indoor unit tubing.
• Mounting torque refers to the right table
Model AD072~092MQERA AD122~182MQERA AD242~542MQERA
Tubing Size (mm)
Gas pipe Ф9.52 Ф12.7 Ф15.88
Liquid pipe Ф6.35 Ф6.35 Ф9.52
Tubing Material Phosphor deoxy bronze seamless pipe (TP
2
) for air conditioner
Outer Diameter of Tubing (mm) Mounting Torque
Ф6.35 11.8~13.7N.m
Ф9.52 32.7~39.9N.m
Ф12.7 49.0~53.9N.m
Ф15.88 78.4~98.0N.m
Ф19.05 97.2~118.6N.m
Wrench