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
22
1. Leak checking
2. Vacuuming
3. Precharging refrigerant
Reducing
valve
Reducing
valve
Nut
Vacuum pump
Refrigerant cylinder
Electronic
scale
Vacuum pump
Refrigerant
cylinder
Electronic
scale