Scenarios without a low temperature component
Left pressure gauge is low pressure gauge. Right pressure gauge
•
is high pressure gauge.
•
The specification of needle valve is 7/16-20UNF.
Scenarios with low temperature components
1. Leak checking
2. Vacuuming
3. Precharging refrigerant
Low-pressure needle valve
Discharge
pipe needle
valve
Valve Valve
Nut
•
Left pressure gauge is low pressure gauge.
Right pressure gauge is high pressure gauge.
•
The specification of needle valve is 7/16-
20UNF.
Low-pressure needle valve
Discharge pipe
needle valve
Liquid pipe
needle valve
Valve
Valve
25
Reducing
valve
Reducing
valve
Nut
1. Leak checking
2. Vacuuming
3. Precharging refrigerant
Vacuum
pump
Refrigerant
cylinder
Electronic
scale
Vacuum
pump
Refrigerant
cylinder
Electronic
scale