Haier AB072MRERA Service Manual page 122

Connecting Procedures of Refrigerant Tubing
Proceed the flare 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
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Cutting and Enlarging
Cutting or enlarging pipes should be proceeded
by installation personnel according to the
operating criterion if the tube is too long or flare
opening is broken.
Vacuumizing
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 Valves
Open all the valves of outdoor units. [NB: oil
balancing stop valve must be shut up completely
when connected one master unit.]
Checkup for Air Leakage
Check if there is any leakage at the connecting part
and bonnet with hydrophone or soapsuds.
5.9.2 Electrical wiring
■ Electrical construction should be made with specific mains circuit by the qualified personnel according to the
installation instruction. Electric shock and fire may be caused if the capacity of power supply is not sufficient.
■ During arranging the wiring layout, specified cables should be used as the mains line, which accords with the
local regulations on wiring. Connecting and fastening should be performed reliably to avoid the external force of
cables from transmitting to the terminals. Improper connection or fastness may lead to burning or fire accidents.
■ There must be the ground connection according to the criterion. Unreliable grounding may cause electrical
shocks. Do not connect the grounding line to the gas pipe, water pipe, lightening rod and telephone line.
Outer diameter Mounting
of tubing (mm) torque (N.m)
Φ6.35 11.8 (1.2kgf.m)
Φ9.52 24.5 (2.5kgf.m)
Φ12.7 49.0 (5.0kgf.m)
Φ15.88 78.4 (8.0kgf.m)
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 confirm 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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WARNING
114
Increase mounting
torque (N.m)
13.7 (1.4kgf.m)
29.4 (3.0kgf.m)
53.9 (5.5kgf.m)
98.0 (10.0kgf.m)
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