34
WGS 130A to 190A
OM WGS-5
Alarms and Events
Situations may arise that require some action from the chiller or that should be logged for
future reference. A condition that causes a shutdown and requires manual reset is known as
a stop alarm. Other conditions can trigger what is known as an event, which may or may
not require an action in response. All stop alarms and events are logged.
Unit Stop Alarms
The alarm output and red button led shall be turned ON when any stop alarm occurs. They
shall be turned off when all alarms have been cleared.
Evaporator Flow Loss
Alarm description (as shown on screen):
Evap Water Flow Loss
Trigger:
1: Evaporator Pump State = Run AND
Evaporator Flow Digital Input = No Flow for time >
Flow Proof Set Point AND at least one compressor running
2: Evaporator Pump State = Start for time greater than Recirc Timeout Set Point and all
pumps have been tried
Action Taken:
Rapid stop all circuits
Reset:
This alarm can be cleared at any time manually via the keypad or via the BAS clear
alarm signal.
If active via trigger condition 1:
When the alarm occurs due to this trigger, it can auto reset the first two times each day, with
the third occurrence being manual reset.
For the auto reset occurrences, the alarm will reset automatically when the evaporator state
is Run again. This means the alarm stays active while the unit waits for flow, then it goes
through the recirculation process after flow is detected. Once the recirculation is complete,
the evaporator goes to the Run state which will clear the alarm. After three occurrences, the
count of occurrences is reset and the cycle starts over if the manual reset flow loss alarm is
cleared.
If active via trigger condition 2:
If the flow loss alarm has occurred due to this trigger, it is always a manual reset alarm.
Condenser Flow Loss
Alarm description (as shown on screen):
Cond Water Flow Loss
Trigger:
1: Condenser Pump State = Run AND
Condenser Flow Digital Input = No Flow for time >
Flow Proof Set Point AND at least one compressor running
2: Condenser Pump State = Start for time greater than Recirc Timeout Set Point and all
pumps have been tried
Action Taken:
Rapid stop all circuits
Reset:
This alarm can be cleared at any time manually via the keypad or via the BAS clear
alarm signal.
If active via trigger condition 1:
Содержание WGS130AA: WGS140AW
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