Johnson Controls York YHAU-C, Installation, Operation And Maintenance Manual

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CAUTION
Make sure that the valve is completely open.
8. Continue to purge for 2 to 3 hours.
9. Close valve V13 and V16.
10. Press the Manual Purge OFF button. The vacuum pump stops.
For information on how to set up an automatic purge, see Automatic method to purge non-
condensable gas from purging tank .
Manual method to purge non-condensable gas from purging
tank
While the absorption chiller operates, non-condensable gas accumulates in the purging tank. To
purge the gas manually, use the following procedure.
1. Set the valves according to pattern C shown in Figure 69.
2. Press the Purge Mode Manual button.
3. Press the Manual Purge ON button. The vacuum pump starts. The solenoid valves SV1 and SV2
open.
4. 3-4 minutes after the vacuum pump starts, confirm that the vacuum gauge stands at 0 ~ 0.15
psi.
5. Verify valve V10 is open.
6. Reading the vacuum gauge, gradually open valve V11.
7. The manual purge procedure is complete when the pressure reaches 0.3 psi or less on the
vacuum gauge.
8. Close valve V11.
9. Press the Purge Pump OFF button. The vacuum pump stops.
For information on how to set up an automatic purge, see Automatic method to purge non-
condensable gas from purging tank .
YHAU-C Single Effect Steam-Fired Absorption Chiller 146