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Installation Procedures
Drain Test
Test the drainpipe to confirm that there are no leaks or other issues with the drainpipe.
• After system is fully installed and power is applied, turn on cooling operation and
add water to check for drainage.
• Confirm sound from the motor of the drainage pump and check for proper drainage.
Tubing Permissible Length & Height Difference
Please refer to the Haier MRV selection software.
Tubing Materials & Specifications
Please refer to the manual of the outdoor unit.
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.
Connecting Procedures of Refrigerant Tubing
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 right table.
wrench
Wire Connections
1. Connecting using circular crimp terminals:
The method of using circular terminal is shown in the figure. Take off the screw, connect it to the
terminal after placing it through the ring at the end of the lead and tighten it down.
2. Connecting using straight terminals:
The method of using straight terminals is shown as follows: loosen the screw before putting the wire into the terminal
block, tighten the screw and confirm it has been tightened by pulling the line gently.
3. Clamp the wires:
Secure the wires with clips which should press on the insulation of the wires.
joint of drainpipe
Model
Gas pipe
Tubing Size
in (mm)
Liquid pipe
Tubing
Material
Outer Diameter of
Tubing in (mm)
Ø1/4"(Ø6.35)
Ø3/8"(Ø9.52)
Ø1/2"(Ø12.7)
Ø5/8"(Ø15.88)
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.
10
MVAB009~018MV2AA MVAL024~048MV2AA
Ø1/2"(Ø12.7)
Ø1/4"(Ø6.35)
R-410a rated copper tubing
Mounting Torque
lb-in (N-m)
104.4 (11.8)
216.8 (24.5)
443.7 (49.0)
693.9 (78.4)
terminal tier
pressing clip
correct
pressing
3.9in(100
mm) below
under the ceiling
Ø5/8"(Ø15.88)
Ø3/8"(Ø9.52)
Flare Torque Spec
ft-lb (N-m)
13 (18)
30 (40)
43 (59)
76 (103)
Connecting
circular
terminals:
wrong
pressing
Tu
Tu
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