035-19569-101 (0109)
6-2
GB
6.3.2 Start-up
1. If the chilled water pump is manually operated, start
the pump. The control centre will not allow the chiller
to start unless chilled liquid fl ow is established through
the unit. (A fi eld supplied chilled water fl ow switch is
required.) If the chilled liquid pump is wired to the
graphic control centre the pump will automatically
start.
2. To start the chiller, press the compressor START (3)
switch. This switch will automatically spring return
to the RUN (I) position. When the start switch is
energised, the control centre is placed in an operating
mode and any fault will be shown by a display
message.
CAUTION
Any faults which occur during STOP/RESET
are also displayed.
CAUTION
The pre-rotation vanes are closed automatically
when the chiller is shut down to prevent loading
the compressor on start-up.
When the chiller starts, the following automatic
sequences are initiated: (Refer to Figures 6.2 and 6.3,
Chiller Starting & Shutdown Sequence).
1. The control centre display message will read
SYSTEM PRELUBE for the fi rst 50 seconds of the
starting sequence.
2. The oil pump will start to circulate oil for a 50 second
pre-run to establish oil fl ow and adequate lubrication
to all bearings, gears, and rotating surfaces within
the compressor. The high and low oil pressure
transducers (OP) and the oil temperature sensor
(RT3) will sense any malfunction in the lubrication
system.
3. The anti-recycle timer software function will operate
after the 50 seconds of pre-run time. At this time,
the timer will be initiated and will run for 30 minutes
after the compressor starts. If the chiller shuts down
during this period of time, it cannot be started until
the timer completes the 30 minute cycle.
4. The chilled liquid pump contacts will close, starting
the chilled liquid pump, to establish liquid fl ow through
the evaporator before the compressor starts.
5. After the fi rst 50 seconds of operation, the compressor
will start.
6. For display messages and information pertaining
to operation, refer to the Graphic Control Centre
(OptiView )Operating Instructions (160-54-OI).
Figure 6.1 Control Centre
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