Mobile room air conditioner / Installation Manual
15 / 88 EN
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Decontaminate the pipeline by inert gases again.
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Cut or weld the pipeline.
3. The refrigerant should be returned to the appropriate storage
tank. The system should be blown with oxygen free nitrogen to
ensure safety. This process may need to be repeated for several
times. This operation shall not be carried out using compressed air
or oxygen.
4. Through blowing process, the system is charged into the
anaerobic nitrogen to reach the working pressure under the
vacuum state, then the oxygen free nitrogen is emitted to the
atmosphere, and in the end, vacuumize the system. Repeat this
process until all refrigerants in the system is cleared. After the
final charging of the anaerobic nitrogen, discharge the gas into
the atmosphere pressure, and then the system can be welded.
This operation is necessary for welding the pipeline.
Procedures of charging refrigerants
As a supplement to the general procedure, the following
requirements need to be added:
- Make sure that there is no contamination among different
refrigerants when using a refrigerant charging device. The
pipeline for charging refrigerants should be as short as possible to
reduce the residual of refrigerants in it.
- Storage tanks should remain vertically up.
- Make sure the grounding solutions are already taken before the
refrigeration system is charged with refrigerants.
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Safety precautions
