CD 30 ÷ 520
39
2) Vacuum refrigerant pipeline more than 15 minutes and confirm it achieve -1.0h10
5
Pa
˄-76cmHg˅.
3) After having achieved the designated vacuity, add refrigerant to the system from the
cylinder, corresponding volume of the refrigerant can be got from the nameplate and
parameters table. It should be noticed that charging just be allowed from the liquid
pipeline side.
4) The volume charged into the system will vary from different surrounding Temperature,
if the designated volume can’t be achieved, unit can be started for recharging while
the water system is running. Wire the low-pressure switch to short circuit if necessary.
Notice: rewiring the connection after charging.
Additional refrigerant charge
Connect refrigerant cylinder to the refrigerant charging hole and mount a pressure
detector on the gas side pipeline.
1) Recycle the chilled-water, then start unit, take low-pressure control switch to short
circuit if necessary.
2) Charge the refrigerant into the system slowly, and Query the discharge and suction
pressure.
Warning: it is absolutely forbidden to charge the oxygen, acetylene or other gas
which is poisonous or flammable into the system for leak hunting or leakage test,
just nitrogen or refrigerant is allowed.
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