10) Close the joint A which has been loosened in Step (7).
Low pressure
Slightly open the CB valve, and discharging gas, close A. (Inside purge of hose)
For HFC-134a
HFC-134a
SYSTEM ANALYZER
High pressure
CB
HFC-134a�p
A
11) At first open the VB valve of vacuum pump. Then, slowly open the LB and HB valves to evacuate the cycle. (Do not apply load to the vacuum pump.)
For HFC-134a
LB VB
Low High pressure pressure HB
HFC-134a
SYSTEM ANALYZER
HFC-134a�p
P
Q
Open in order of 1 - 2.
12) Execute vacuum evacuation for 20 minutes.(Keep the valves as shown in the figure of Step (11).) 13) After completion of vacuum evacuation close all the valves.
Stop the vacuum pump
For HFC-134a
Low LB VB
High HB
CB
pressure pressure
HFC-134a
SYSTEM ANALYZER
HFC-134a�p
14) Read the indication of charging cylinder. 15) Open the LB valve, and charge the specified quantity of refrigerant through the CB valve.
Low LB VB pressure
High pressure
CB
For HFC-134a
HFC-134a
SYSTEM ANALYZER
HFC-134a�p
Seeing the indication of charging cylinder, adjust the specified filling quantity at the CB valve.
