confirm stop command)
•recycle condition is present (see Chilled Water Recycle Mode section)
•time schedule has gone into UNOCCUPIED mode (machine protective limit has been reached and machine is in alarm)
•the start/stop status is overridden to stop from the CCN network or the LID
When a stop signal occurs, the shutdown sequence first stops the compressor by deactivating the start relay. A status message of ‘‘SHUTDOWN IN PROGRESS, COMPRESSOR DEENERGIZED’’ is displayed. The guide vanes are then brought to the closed position. The oil pump relay and the chilled water/brine pump relay are shut down 60 seconds after the compressor stops. The condenser water pump will be shut down when the CONDENSER REFRIGERANT TEMP is less than the CONDENSER PRESSURE OVERRIDE minus 5 psi (34 kPa) or is less than or equal to the ENTERING CONDENSER WATER TEMP plus 3° F (2° C). The
Certain conditions during shutdown will change this sequence:
•if the COMPRESSOR MOTOR LOAD is greater than 10% after shutdown, or the starter contacts remain energized, the oil pump and chilled water pump remain ener- gized and the alarm is displayed
•if the ENTERING CONDENSER WATER temperature is greater than 115 F (46 C) at shutdown, the condenser pump will be deenergized after the 1CR compressor start relay
