Huawei NetCol8000-A - 5.6 Exhausting Nitrogen at the Outdoor Unit Needle Valves; 5.7 Welding the Outdoor Unit Ports; 5.8 (Optional) Connecting Low Temperature Component Pipes

15
Thermal insulation foam
5/8 inch liquid pipe
7/8 inch gas pipe
(Optional) Connecting Low Temperature Component Pipes
5.8
To indoor unit
liquid pipe
To indoor unit gas pipe
To outdoor unit gas pipe
To outdoor unit liquid pipe
•
When the outdoor is installed vertically,
the gas pipe should be connected to the
top port and liquid pipe should be
connected to the bottom port.
•
A reducing pipe is required when welding
3/4 inch copper pipe to 5/8 inch
connector.
5/8 inch liquid pipe
Thermal
insulation
foam
7/8 inch gas pipe
Welding the Outdoor Unit Ports
5.7
Exhausting Nitrogen at the Outdoor Unit Needle Valves
5.6
Exhaust nitrogen from the three needle valves respectively. Do
not remove the needle valve plug in case of loss or damage.