2-3
2-3. CONTROL PROCEDURES FOR AUXILIARY EQUIPMENTS
(1) On-off control of the auxiliary equipments such as chilled water pump, cooling water pump, cooling
tower fan and hot water pump shall be linked to the absorption chiller operation for the safety of the
absorption chiller.
(2) It is necessary to operate the auxiliary equipments following the interlocking signal from the chiller.
Those equipments and the chiller shall be wired according to the manufacture’s specified wiring
diagram. The chiller includes “chilled water pump on-off signal” and “cooling water pump on-off
signal” and “hot water pump on-off signal” as standard equipment system.
(3) The chiller also includes “cooling tower fan on-off signal” as standard.
Operation signal
ON
OFF
Absorption chiller
Chiller stop
1 hour after chiller stop
Chiller
RUN
STOP
Cooling tower fan
on-off signal
ON
OFF
Cooling water
flow switch
(option)
ON
OFF
Cooling water
pump on-off
signal
ON
OFF
Hot water pump
on-off signal
ON
OFF
Chilled water
pump on-off
signal
ON
OFF
Chilled water
flow switch
ON
OFF
Cooling tower fan
RUN
STOP
Cooling water
pump
RUN
STOP
Chilled water
pump
RUN
STOP
Hot water pump
RUN
STOP
AHU or FCU
ON
OFF
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Auxiliary equipments
