Airwell KXV Series, Инструкция по эксплуатации

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Engineering manual
219
1.4.8 Refrigerant piping
WARNING

It is forbidden to discharge refrigerant into the atmosphere. Collect the refrigerant in accordance with the Freon
collection and destruction law.

If the refrigerant gas leaks during installation work, ventilate the room immediately.

Do not use flux when brazing the refrigerant piping. For brazing, use phosphor copper brazing filler metal (BCuP)
which does not require a flux.
Tubing procedure:
1)
Keep stop valve on outdoor unit in “off” status (ex-factory specification) as original, dismantle end caps on
refrigerant lines and the unit, and proceed quickly with flare connection.
Caution:
If being put aside for a long time after end caps being removed, breakdown may happen to tubes because
of invasion of dust, water and foreign matter into pipe, so please proceed to connection operation as following
rapidly.
Before tightening flare nuts, a layer of attached cooling engine oil should be thinly applied on the sealed pad surface
between tubes and connectors.
Please proceed tubing connections with two wrenches and refer to the following table for tightening torque.
2) Finish flare-connecting operation in succession and interconnect all refrigerant lines.
After pipes being connected, leakage detector or soup water must be used to check if there are any leaks.
3) Proceed evacuation from service entrance of stop valve on the outdoor unit.
4) After completion of above operation, keep stop valve (commonly used by liquid and gas) on the outdoor unit totally
open. By then, refrigerant cycle between indoor units is all connected.
Chart 1-20