KIRLOSKAR CHILLERS PRIVATE LIMITED
A Kirloskar Group Company IOM-KAC-ENG - Page 24
f) If unit is with more than one compressor, the lead / lag compressor is selected by the
controller will be decided and started by the controller as explained in the controller
operation manual.
g) The controller continuously monitors the condensing pressure, suction super heat and
discharge super heat and will adjust the opening of electronic expansion valve
accordingly.
h) The unit will stage-up automatically to meet system demand based on the set points
stored in controller.
i) After reaching steady operation and the leaving chilled liquid temperature has been
pulled down to the required temperature and suction super-heat. Compressor suction
super-heat should be approx. 5C ~ 10C (41F ~ 50F) . 7 C is designed superheat. The
suction superheat below 5C is not recommended due to the risk of liquid flow back.
j) Optimum operating characteristics are viewable on the controller display.
3.6. Stop or Weekend or Temporary Shutdown
a) Turn the RUN/STOP circuit switches to STOP position. Each circuit will pump-down
and the respective compressor to STOP position.
b) After the circuits have been pumped down stop the evaporator / chiller liquid pump(s).
3.7. Extended Shutdown
a) Isolate the compressor with the help of isolation valves.
b) After the circuits have been pumped down, stop the evaporator / chiller liquid pump(s).
c) Drain all water from the evaporator system piping.
d) To start the unit again, follow the steps from unit Start-up.
e) Use isolation valve and Completely closed EEV to change filter.
NOTE: INITIAL START-UP IS TO BE PERFORMED ONLY BY KIRLOSKAR
CHILLERS AUTHORIZED SERVICE TECHNICIAN. THIS IS A MUST TO
OBTAIN THE COMPLETE WARRANTY BENEFITS.
NOTE: FOR TEMPORARY SHUTDOWNS, KEEP THE UNIT’S
POWER SUPPLY ON.
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