INSTALLATION GUIDE
33
STANDARD 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
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 blanking caps of the 2-way
and 3-ways valves, applying the above
torque Table
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