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6.4 Continuous Purging
6.4.1 Explanation on the system of continuous purging
(1) Non-condensable gas is sucked by ejecting solution at the suction portion from the nozzles---
ejector actuation. The opening of the valve V-10 must be set at about one and a half turn opening
from the fully closed position.
(2) Non-condensable gas enters the reservoir together with solution and moisture is absorbed by
solution, and the non-condensable gas only is accumulated in the reservoir.
(3) The non-condensable gas in the reservoir is purged into the atmosphere by simultaneous use of
the purge pump.
(4) Operation frequency of purge pump
A few times of purging is considered enough except for the time of initial of the chiller-heater when
non-condensable gas may be much in the shell, because the machine is provided with palladium
cell as standard. As a standard to be set up, the purge pump should be operated when some drop
of refrigerating capacity due to long use of the chiller-heater is found or the pressure in the vacuum
chamber reaches 60 mmHg.
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