Glen Dimplex Koolant Koolers WO2-2-10000, User Manual

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Operation
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7.2.4 Changing the Setpoint:
To change the setpoint:
•
P ress the “Prg” key and the main menu w ill be displayed
•
Highlight the menu labeled “B. SETPOINT” and press the “Enter” key . The page will look similar to Error! R
eference source not found.
•
Pr ess the “Enter” key again and move the cursor over the fluid setpoint temperature
•
Use the “

” and “

” keys to change the temperature and press the “Enter” key to accept
•
Press the “Esc” key to return to the main menu
7.2.5 Viewing Alarms
When an alarm occurs, the red alarm light on the PGD display will light up (a buzzer will activate if not disabled).
To view this alarm, press the “Alarm” key and the alarms will be displayed. To view all active alarms, use the
arrow keys to scroll up and down. To cl ear all inactive alarms, press and hold the “Alarm” key. At the end of the
alarms a page similar to Error! Reference source not found. will be displaye d. Press the “Enter” key and you will b
e taken to the Alarm Log page where you can view the alarm history.
7.2.6 Sequence of Operation:
Upon system start, with all compressors and pumps enabled, a brief delay will occur and then the pump that
didn’t run during the last operation cycle will start first. If flow is established, the pump will continue to run. If
no flow is established for the defined flow fault delay time, the opposing pump will automatically start. Pumps
will rotate once every 24 hours to balance run time. Once flow is established and cooling demand increases to
25%, the compressor with the least run time will start. As cooling demand increases to 50%, the compressor in
the alternate set with the least run time will start. At a cooling demand of 75% and 100% the remaining
compressors will stage up. When cooling demand decreases by 25% from a compressor start percentage, a
compressor will cycle off. C
ompressors drop out in a ‘first in - first out’ sequence. The cooling demand signal is
proportional and integral driven so the cycling of compressors should slowly correct to be centered about the
set point.