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Tubing Materials & Specifications
Model
Tubing Size
Liquid pipe
Tubing Material
Phosphor deoxybronze seamless pipe (TP
Refrigerant Filling 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 or compressor failure can be caused by filling
too much or little refrigerant.
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
Wrench
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 main unit.]
Checkup for Air Leakage
Check if there is any leakage at the
connecting part and bonnet with hydrophone
or soapsuds.
MVAH009~018MV2AA MVAH024~048MV2AA
Gas pipe
Ф1/2
Ф1/4
Ф5/8
Ф3/8
) for air conditioner
2
Outer Diameter of Tubing
Ф1/4
Ф3/8
Ф1/2
Ф5/8
Ф3/4
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.
Correct
pressing
27
Mounting Torque
11.8~13.7N.m
32.7~39.9N.m
49.0~53.9N.m
78.4~98.0N.m
97.2~118.6N.m
Connecting
circular terminals:
Terminal tier
Wrong
pressing
Pressing clip
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