AUX DC Inverter Free Match 50HZ R32
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absolute pressure is no less than 50Pa after this operation.
3. Turn off the pressure gauge and vacuum pump to keep the pressure in the same level in 20
minutes.
◇Emptying: When process this operation, please disconnect the high pressure valve with
liquid valve.
1. Connect the gas valve of the stop valve to the thimble side of the rubber hoses, the other side
of rubber hoses should be connected to the refrigerant tank.
2. Open the refrigerant tank valve, using the refrigerant inside the tank with high speed to empty
the air in the indoor unit and the connection piping. When the outlet air becomes mist (it feels cold
by touching it), then the air is emptied.
3. When ensure that the air is emptied, connect and tighten the high pressure valve of outdoor
unit stop valve and liquid side connection pipe, keep this state more than 10 seconds.
4. Use soapy what to test each connection junctions (including lengthen piping welding junction)
5. Confirmed that there is no leakage, turn off the valve of refrigerant tank, take down the rubber
hose as well.
◇Turn on the high-low pressure valve of the outdoor unit.
After vacuum and emptying, screw back the cover of the maintenance valve of outdoor unit
low pressure valve, screw off the high-low pressure valve of the outdoor unit (note: shall totally
turned off ). Connect the refrigerant to the system.
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