Haier MRV Serie Instrucciones De Instalación página 14

INSTALLATION INSTRUCTIONS
Pipe Length and Height Difference
Please refer to the attached manual of outdoor units.
Model
Tubing Size in(mm)
Tubing Material
Tubing Material and Specifications
Special tools designed for R410A should be used for cutting and flaring pipes.
Refrigerant Recharge Amount
Add refrigerant according to the installation instructions for the outdoor unit. The addition of R410A refrigerant must be
performed with a digital scale to ensure proper quantities. Compressor failure can be caused by over or under charging
the system.
Connection Procedures of Refrigerant
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
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 R410a flare tool to create flares.
Wire Connections
1. Connect 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. Connect 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.
14
MVAM007!018ME2AA
Gas Pipe 1/2" (Ø12.7)
Liquid Pipe 1/4" (Ø6.35)
Seamless copper pipe rated for R410A refrigerant
Out Diameter of Tubing
in (mm)
1/4" (Ø6.35)
3/8" (Ø9.52)
1/2" (Ø12.7)
Mounting Torque Flare Torque Spec
lb-in (N-m) ft-lb (N-m)
104.4 (11.8) 13 (18)
216.8 (24.5) 30 (40)
443.7 (49.0) 43 (59)
Correct pressing
MVAM024~054ME2AA
5/8" (Ø15.88)
3/8" (Ø9.52)
Connecting
circular
terminals
Terminal tier
Pressing
Clip
Wrong pressing
31-5000500 Rev. 0