KIRLOSKAR CHILLERS PRIVATE LIMITED
A Kirloskar Group Company IOM-KAC-ENG - Page 10
4. Failure to pay heed to recommended clearances may result in reduced system performance,
nuisance shutdown & / or servicing problems.
In all air-cooled units, condenser air inlet and condenser fan air discharge must be free from
obstruction. Unit installed less than the minimum recommended clearance to a wall OR top
clearance OR between units may experience a combination of coil starvation and warm air re-
circulation. Warm air re-circulation occurs when the discharge air from condenser fan is recycled
back to the condenser coil inlet. Coil starvation occurs when free airflow to the condenser is
restricted. Both warm air recirculation and coil starvation reduces the unit capacity and operating
efficiency because of the high head pressure. Hence, unit must be located at a place where it gets
free air supply.
2.3. Evaporator Water / Brine (Liquid) Piping
All Evaporator water nozzles come with standard grooved neck type nozzles for Flexible
couplings (Victaulic couplings). Victaulic coupling is in customers scope.
a) Isolation valves shall be provided at evaporator water / brine (liquid) inlet and outlet
connections. This helps in accomplishing the normal servicing without draining the liquid in total
system.
b) It is recommended to use flexible connections between the evaporator liquid nozzle
connection and the system OR process piping, suitable for the system liquid pressure to eliminate
vibration transformation either from system to unit OR vice versa.
c) Although evaporator has an air vent on shell side, it is recommended that the main chilled
liquid header shall have vent valve at the top most point in the header to facilitate purging on
evaporator liquid headers.
d) Entering evaporator liquid connection must always be to the nozzle near to the head cover
having refrigerant liquid in and vapor out connections. Refer Fig. 2.3a for details
Fig. 2.3a Typical Evaporator Water/ Brine (liquid) Piping
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