4-2-2. Refrigerant blow down
During cooling operation, a little quantity of absorbent could mix into the refrigerant.
This absorbent could increase by a long-term operation and result in a lowering of the
cooling capacity, so refrigerant blow down must be performed once in a cooling season.
By this work, the dirty refrigerant is transferred to absorber side, and new, clear refrigerant
is regenerated.
(1) Make sure the refrigerant pump is
rotating, and also the solution level is
visible through the sight glass of the
evaporator.
(2) Open the blow valve completely.
(3) When the solution level becomes
invisible, close the blow valve tightly.
The above is the blow down procedure.
Repeat it a few times as necessary.
As for the refrigerant blow down, please
make a maintenance contract with
Carrier service agent.
Refrigerant blow valve
Fig.4-2
45
