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26
Customer Service Troubleshooting Tips
Operating Instructions
Safety Instructions
Installation Instructions
Customer Service Troubleshooting Tips
Installation Instructions
Safety Instructions
Operating Instructions
Customer Service Troubleshooting Tips
Installation Instructions
Safety Instructions
Operating Instructions
Installation instructions.
Evacuation:
Connect the charge hose end described in the
preceding steps to the vacuum pump to evacuate
the tubing and the indoor unit. Confirm that the
“Lo” knob of the manifold valve is open. Run the
vacuum pump. The operation time for evacuation
varies with the tubing length and capacity of the
pump.
Allow the pump to operate until the system has
been evacuated down to 300 microns. Allow the
pump to continue running for an additional 15
minutes. Turn off the pump and leave the
connections secured to the two service valves. After
5 minutes, if the system fails to hold 500 microns or
less, check all connections for tight fit and repeat
the evacuation procedure.
Finishing the Job:
1
With a service valve wrench, turn the valve stem of
the liquid side valve counter-clockwise to fully
open the valve.
2
Turn the valve stem of gas side valve counter-
clockwise to fully open the valve.
3
Loosen the charge hose connected to the gas side
service port slightly to release the pressure, then
remove the hose.
4
Replace the flare nut and its bonnet on the gas
side service port and fasten the flare nut securely
with an adjustable wrench. This process is very
important to prevent gas leaks in the system.
5
Replace the valve caps at both gas and liquid side
service valves and fasten them securely and
tightly.
This completes air purging with a vacuum pump.
The system is now ready to test run.
Manifold valve
Pressure
gauge
Vacuum pump
Outdoor unit
Indoor unit
For any service which requires entry
into the refrigerant sealed system,
Federal regulations require the work
be performed by a technician having a
Class II or Universal certification.
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