YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
YMGI: Your Modern Green Idea
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6.
Wait for 10min to see if the system pressure can remain unchanged. If the pressure increase, there may be
leakage.
7.
Slightly open the liquid valve and let some refrigerant go to the connection pipe to balance the pressure inside
and outside of the connection pipe, so that air will not come into the connection pipe when removing the hose.
Notice that the gas and liquid valve can be opened fully only after the manifold valve assembly is removed.
8.
Place back the caps of the liquid valve, gas valve and also the service port.
For large-size units, there are maintenance ports for liquid valve and gas valve. During evacuation, you may connect the
two hoses of the branch valve assembly to the maintenance ports to speed up the evacuation.
Refrigerant should be reclaimed into the appropriate storage tank. System should use oxygen-free nitrogen purging to
ensure safety. This process may need to repeat several times. Do not use compressed air or oxygen in this process.
