Huawei NetCol500-A080 - Page 40

39
Nut
Reducing valve
Nitrogen cylinder
Electronic
scale
Refrigerant
cylinder
Vacuum
pump
Low-pressure needle valve
Exhaust pipe needle valve
Liquid pipe needle valve
1. Leak checking
2. Vacuuming
3. Precharging refrigerant
Scenario with a Low Temperature Component
(NetCol8000-A045/A055/A090 Downflow)
Scenario with a Low Temperature Component
(NetCol8000-A060/A120 Downflow)
Nut
Reducing valve
Nitrogen cylinder
Electronic
scale
Refrigerant
cylinder
Vacuum pump
Low-pressure needle valve
1. Leak checking
2. Vacuuming
3. Precharging refrigerant
Exhaust pipe
needle valve
Liquid pipe needle valve