Automatic method to purge non-condensable gas from
purging tank
This chiller has an automatic purge system. The vacuum pump starts and stops by detecting the
pressure inside the purge tank.
1. Set the valves in accordance with purge pattern D shown in Figure 69.
2. Press the Manual Purge OFF button.
3. Press the Purge Mode AUTO button.
4. The purge solenoid valves automatically open and close.
During the automatic purge operation, the vacuum pump starts when the purging tank pressure
increases to 60 mmHg Abs (8 kPa) and stops when it decreases to 30 mmHg Abs (kPa).
CAUTION
When the oil in the vacuum pump or belt is being replaced, or when maintenance work is being
performed while the absorption chiller is running, turn off the circuit breaker of the vacuum pump in
the control panel. Failure to do this can cause the vacuum pump to start abruptly and cause injury.
147YHAU-C Single Effect Steam-Fired Absorption Chiller
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