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INSTALLATION INSTRUCTIONS
Piping Permissible Length & Height Difference
•
Please refer to the Haier MRV selection software.
•
Additional Refrigerant Charge
•
Add refrigerant according to the installation manual of outdoor unit. The addition of R410A refrigerant must be
performed with a digital scale to ensure the specified amount is added. Not following this can potentially cause
efficiency issues or compressor failure.
Pipe Sizing
Please refer to the manual of the outdoor unit.
Model
Piping Size
Gas pipe
in (mm)
Liquid pipe Ø1/4"(Ø6.35)
Piping
R-410a rated seamless copper tubing
Material
Connecting Procedures of Refrigerant Piping
Connect all the refrigerant tubes via flare connections.
•
Dual wrenches must be used in the connection of indoor unit tubing.
•
For tightening torque refer to the table.
Mounting Torque lb -in (N-m)
104.4 (11.8)
216.8 (24.5)
693.9 (78.4)
Cutting and Enlarging
•
Cut the tube to the needed length
•
Ream the cut to remove shoulder. Do this with the tube facing down to help fillings fall out.
•
Add supplied flare nut to tube.
•
Use 45° flare tool to create flare.
22
MVAX009 -
MVAX018 -
012ME2AA
036ME2AA
Ø3/8"(Ø9.52)
Ø5/8"(Ø15.88)
Ø3/8"(Ø9.52)
Flare Torque Spec ft-lb (N-m)
13 (18)
30 (40)
76 (103)
MVAX042 -
MVAX054 -
048ME2AA
060ME2AA
Ø5/8"(Ø15.88)
Ø5/8"(Ø15.88)
Ø3/8"(Ø9.52)
Ø3/8"(Ø9.52)
Wrench
31-5000755 Rev. 0
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