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Charging additional refrigerant
Use a cylinder designed for use with
CAUTION
R410A.
● Charging additional refrigerant (calculated from the liquid
tube length as shown in the section "1-8. Additional
Refrigerant Charge") using the liquid tube service valve.
● Use a balance or scale to measure the refrigerant
accurately.
● If the additional refrigerant charge amount cannot be
charged at once, charge the remaining refrigerant in liquid
form by using the refrigerant charge connection port with
the system in Cooling mode at the time of test run.
● Close the valve on the cylinder containing R410A.
Finishing the job
(1) With a flathead screwdriver, turn the liquid tube service
valve counter-clockwise to fully open the valve.
(2) Turn all service valve counter-clockwise to fully open the
valve.
(3) Close all stop valves and loosen the "Lo" knob of the
manifold valve.
(4) Loosen the charge hose connected to all service port, then
remove the hose.
(5) Replace all valve caps at all service ports and fasten them
securely.
This completes air purging with a vacuum pump. The air
conditioner is now ready for a test run.
48
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