Huawei NetCol8000-A - Scenarios without a low-temperature component (NetCol8000-A045;A055;A090 Downflow); Scenarios without a low-temperature component (NetCol8000-A060;A120 Downflow)

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Low-pressure needle valve
1. Leak checking
2. Vacuuming
3. Precharging refrigerant
• Left pressure gauge is low pressure gauge. Right pressure gauge is high pressure gauge.
• The specification of needle valve is 7/16-20UNF.
Scenarios without a low-temperature component (NetCol8000-A045/A055/A090
Downflow)
The figures use a single-system unit as an example. You need to perform leak checking,
vacuuming, and precharging refrigerant on both systems of a dual-system unit.
Nut
Reducing valve
Vacuum pump
Exhaust pipe
needle valve
Scenarios without a low-temperature component (NetCol8000-A060/A120
Downflow)
Nut
Reducing valve
Vacuum
pump
Low-pressure needle valve
1. Leak checking
2. Vacuuming
3. Precharging refrigerant
Exhaust pipe
needle valve
Electronic
scale
Refrigerant
cylinder
Nitrogen
cylinder
Refrigerant cylinder
Electronic scale
Nitrogen cylinder