Huawei NetCol8000-A045D Quick Manual page 41

Scenario Without a Low Temperature Component
(NetCol8000-A045 Upflow)
Vacuum
pump
Refrigerant cylinder
Electronic
scale
Scenario Without a Low Temperature Component
(NetCol8000-A060 Upflow)
1. Leak checking
2. Vacuuming
3. Precharging refrigerant
Refrigerant
cylinder
Electronic
scale
1. Leak checking
2. Vacuuming
3. Precharging refrigerant
Reducing valve
Nitrogen cylinder
Reducing valve
Vacuum
pump
Low-pressure needle valve
Nut
Exhaust pipe
needle valve
Nut
Nitrogen
cylinder
Exhaust pipe
needle valve
40
Low-pressure
needle valve