40
Charging additional refrigerant
●
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 suction tube service valve
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 the 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.
Use a cylinder designed for
use with R410A.
Lo
Hi
R410A
Manifold valve
Pressure
gauge
Valve
Liquid
Close
Close
Close
Close
Close
Close
Open
Open
Open
Open
Open
Close
Open
Close
Close
Close
Outdoor unit
Outdoor unit
Suction
tube
Suction
tube
Discharge
tube
Discharge
tube
Liquid
tube
Liquid
tube
Balance
tube
Balance
tube
CAUTION
CAUTION
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