User Manual Thermal X - R Series Chillers
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OFF FULL SP ONLY: This option has the fans off when the compressor is off and full speed when
the compressor is on.
High/Low Pressure Control
The system will monitor the discharge pressure of each of the refrigeration circuits and will send a
warning when the pressure starts to get too high or too low. If the alarm pressure is breached, then it
will shut the unit down. It will do these 3 times in a 24-hour period before shutting the chiller down
permanently.
HP/LP Warning
R134A
R407C
Pressure
Pressure
Aqua Cooler - PCB
HP
2300kPa
2750kPa
LP
80kPa [170kPa]
200kPa [400kPa]
The chiller can only be restarted once pressure is back to a reasonable pressure [__kPa].
Water Flow/Pump Control
The system monitors flow rates and will send a warning if a flow rate is breached and shut the chiller
down if the flow alarm point is breached. Zeroing the flow alarm turns it off. It is recommended that
the flow alarm is not turned off.
The pump can be set to run if the chiller develops a fault – by turning this feature ON in the program
will keep water to the process. This water will of course get warm but it is designed to keep the
process cool long enough for system shut down.
If the unit is supplied with a redundant pump the controller will shut the pump down when it detects
a problem with the flow. The pump sitting in redundancy with be started. If there is a problem with
the flow on this pump it will be shut down and the original pump started.
This process will happen 3 times in 24 hours before the unit is shut down permanently and every
week the pumps are duty cycled to share the wear and tear on the units
Compressor Hold Time
The controller will wait 120 seconds before starting compressors up after shut down to prevent too
many start-ups.
Alarm Acknowledge Delay
This delay is the time that the program waits before flagging an alarm. This may be useful in the event
of a tandem switch over to a tank of very warm water for example. If the water is too warm then the
high water temperature alarm may be triggered. If there is a delay then it will give the newly activated
chiller time to pull the water temperature down.
