16
•
When routing pipes, ensure that the pipes are level and straight. The positive height
difference cannot exceed 30 m, the negative height difference cannot exceed 8 m, and the
total pipe length cannot exceed 100 m.
•
The metal support should not be in direct contact with copper pipes. The gradient of
horizontal pipes should meet the design requirements. The welding points must be smooth
and even, free from any abnormalities such as beading, buildup, crack, roughness, bubble,
or air hole.
Pipe Drainage
6.3
1. Connect one end of the rubber hose to the nitrogen cylinder with a reducing valve and
connect the other end to the refrigerant copper pipe in a higher position.
2. Adjust the nitrogen reducing valve to set the nitrogen pressure to 10 bar, and increase the
pressure of the copper pipe.
3. After drainage, disconnect the rubber hose from the copper pipe and seal the two ends of the
pipe using tape to prevent foreign matter from entering the pipe.
4. After completing the operations, close the nitrogen cylinder valve.
NetCol8000-A060 Upflow
NetCol8000-A060/A120 Downflow
NetCol8000-A045/A055/A090 Downflow
NetCol8000-A045 Upflow
Exhausting Nitrogen from the Indoor Unit Through Three Needle
Valves
6.4
