Purge Valves; Start The Chiller-Heater After It Has Been Stopped For A Long Period; Checks After Operation Starts - York YHAU-CE Installation Operation & Maintenance

SECTION 7 – MAINTENANCE

PURGE VALVES

The chiller-heater is equipped with the purge valves
shown in Figure 34 on page 88. For operation of the
valves, see the Performance Check Method of Vacuum
Pump on page 87.
START THE CHILLER-HEATER AFTER IT HAS
BEEN STOPPED FOR A LONG PERIOD
When you start the chiller-heater after it has not run for
3 months, use the following procedure.
1. Check the insulation of the Control Center and
the electric system.
2. Check the operation of the Control Center and the
safety devices.
3. Check that the refrigerant blow valve V2 is closed.
4. Check the vacuum level in the machine using the
pressure gauge of the high temperature generator.
86
FORM 155.35-ICOM2.EN.CE/GB (1018)
The vacuum level should be less than
-0.1 MPaG.
5. Check the waste exhaust gas supply.
6. Press the Refrigerant Pump Stop button.
If the checks are clear, start the chiller-heater.

Checks After Operation Starts

1. 10-15 minutes after the chiller-heater and the so-
lution pump start, check the level gauge of the re-
frigerant tank.
2. If the refrigerant level is within the level gauge,
press the Refrigerant Pump Auto button.
3. Observe the operation for a while. Check that the
refrigerant liquid level does not drop.
4. Use the Automatic Purge procedure shown in Au-
tomatic Method to Purge Non-condensable Gas
from Purging Tank on page 90 to purge non-
condensable gas directly from the absorber.
DATE: 10/30/2018
JOHNSON CONTROLS