Haier AB072MRERA - Page 38

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Pipe length & height difference
Please refer to the attached manual of outdoor units.
Tubing materials & specications
Model AB052-092MCERA AB122-182MCERA AB242-482MCERA
Tubing Size (mm)
Gas pipe Φ9.52 Φ12.7 Φ15.88
Liquid pipe Φ6.35 Φ6.35 Φ9.52
Tubing Material Phosphor deoxy bronze seamless pipe (TP2) for air conditioner
Refrigerant recharge amount
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 specified amount while compressor failure can be caused by
lling too much or little refrigerant.
Connecting procedures of refrigerant tubing
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.
Outer
diameter of
tubing (mm)
Mounting
torque (N.m)
Increase mounting
torque (N.m)
Φ6.35 11.8 (1.2kgf.m) 13.7 (1.4kgf.m)
Φ9.52 24.5 (2.5kgf.m) 29.4 (3.0kgf.m)
Φ12.70 49.0 (5.0kgf.m) 53.9 (5.5kgf.m)
Φ15.88 78.4 (8.0kgf.m) 98.0 (10.0kgf.m)
Cutting and Enlarging
Vacuumizing
Open All Valves
Checkup for Air Leakage
Cutting or enlarging pipes should be proceeded
by installation personnel according to the
operating criterion if the tube is too long or are
opening is broken.
Vacuumize from the stop valve of outdoor units with
vacuum pump. Refrigerant sealed in indoor machine is
not allowed to use for vacuumization.
Open all the valves of outdoor units. [NB: oil balancing
stop valve must be shut up completely when connected
one master unit.]
Check if there is any leakage at the connecting part
and bonnet with hydrophone or soapsuds.
Connecting
1. Connecting circular terminals:
The connecting method of circular terminal is shown
in the Fig. Take off the screw, connect it to the
terminal tier after heading it through the ring at the
end of the lead and then tighten it.
2. Connecting straight terminals:
The connection methods for the circular terminals are
shown as follows: loosen the screw before putting the
line terminal into the terminal tier, tighten the screw
and conrm it has been clamped by pulling the line
gently.
3. Pressing connecting line:
After connecting line is completed, press the
connecting line with clips which should press on the
protective sleeve of the connecting line.
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