glow, if all other conditions are normal.
Once the chilled water temperature has stabilized and the
compressor is intermittently loading or unloading at less
than full load, compare the water temperature with the
module setpoint. If different, consult the Troubleshooting
chart.
Occasionally check the panel lights. The compressor
should not run if any of the eight safety lights are
energized.
SHUTDOWN
Stopping the unit at night or for weekends can be easily ac-
complished by switching the ON-OFF switch on the control
panel to the OFF position. The switch light will go out and
the compressor will stop.
The oil pump will continue operating for 60 seconds after
the compressor starter is de-energized to assure lubrication
to compressor bearings during spin-down.
Once the switch is turned off, the compressor cannot be
restarted unless the switch is repositioned.
If the operator has the need to secure the chiller and pro-
hibit starting by unauthorized personnel, removal of relay R7
from its plug-in base in the control panel will open the pro-
tective circuit and immobilize the unit. In this condition, none
of the control panel lights are energized and the oil heater
circuit is still operative. Relay R7 is identified in Figure 4, page
8. When relay R7 is replaced, the EXT. FAIL light will come
on and the RESET button must be pushed to restore the safe-
ty circuits to the operating mode.
FIGURE 11. PHH063 CHILLER (REAR VIEW)
LEGEND
1. CEO63 Compressor 7. Heat Rejection Condenser
2. Oil Pump 8. Heat Recovery Condenser
3. Oil Cooler 9. Condenser Relief Valves
4. Hot Gas Bypass 10. Evaporator Relief Valve
5. Discharge Check Valve 11. Motor Terminal Cover
6. Evaporator 12. Oil Filter
13. Lube Box
14. Control Panel
15. Motor Cooling Liquid Line
16. Expansion Valve
17. Compressor Suction Line
Page 14 I IM 307
