DC Inverter U-match Series Duct Type Unit
27
manifold valve assembly reads -0.1MPa (-75cmHg), if not, it indicates
there is leak somewhere. Then, close the switch fully and then stop the
vacuum pump.
(6) Wait for 10min to see if the system pressure can remain
unchanged. If the pressure decrease, 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. Note 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.
Pressure gauge (Low-pressure)
Switch (Low-pressure)
Connection pipe (to indoor unit)
Liquid valve
Gas valve
Service port
gauge manifold
Pressure gauge (Hi-pressure)
Switch (Hi-pressure)
Connection pipe
Cap
Service pipe
Cap
Hose with the valve pin
Hose
Cap
Vacuum pump
Notice:
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.
Summary of Contents for DC Inverter U-match Series
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