16
PIPELINES CONNECTION & AIR PURGING
No dust or any other particles, air or moisture should be allowed to enter the air conditioning
system. Careful attention should be paid when pipeline connection for outdoor unit is made. Try
to avoid repeated curves as much as possible; otherwise damage to the copper pipes may occur.
Suitable wrenches should be used when the pipeline connection is done so as to ensure
appropriate torque (refer to following torque table).
Excessive torque action might damage the joints while too little torque might lead to leakage.
Torque based upon the wrench to be used
Copper pipe diam.
Tightening torque
Strengthened tightening torque
6.35(1/4")
160kgf.cm(63kgf.inch)
200kgf.cm(79kgf.inch)
9.52(3/8")
300kgf.cm(118kgf.inch)
350kgf.cm(138kgf.inch)
12.7(1/2")
500kgf.cm(197kgf.inch)
550kgf.cm(216kgf.inch)
15.88(5/8")
750kgf.cm(295kgf.inch)
800kgf.cm(315kgf.inch)
19.05(3/4")
200kgf.cm(472kgf.inch)
1400kgf.cm(551kgf.inch)
If you are installing a multisplit system with easy fit connectors follow the bellow
procedures:
Remove the dust caps from the indoor and outdoor
units and the connecting pipe.
Align the joint of the connecting pipe between the
indoor and outdoor and tighten the connecting nut
manually. Secure it with a wrench as shown applying
maximum torque shown in the table above.
Remove the two valve core caps from the outdoor
unit and turn on the high and low pressure valve
cores with an socket wrench, then tighten the two
valve core caps of the outdoor unit. Finally you can
wrap hot insulating tape around the joints of indoor
and outdoor units
Air purging with vacuum pump
1. Check that pipelines connection have been properly connected, remove the
charging port cap, and connect the manifold gauge and the vacuum pump to
the charging valve by service hoses as shown
2. Open the valve of the low-pressure side of manifold gauge, then run the
vacuum pump. Vacuum the indoor unit and the connecting pipes until the
pressure in them lowers to below 1.5mmHG (The operation time for vacuuming
is about 10 minutes). When the desired vacuum is reached, close the valve of
the low pressure of the manifold and stop the vacuum pump.
3. Disconnect the service hoses and fit the cap to the charging valve.
4. Remove the blank caps, and fully opens the spindles of the 2-way and 3-ways
valves with a service valve wrench.
5. Tighten the blank caps of the 2-way and 3-ways valves, applying the above
torque table
Summary of Contents for eiQ-12K12KC24KWMINV
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