KIRLOSKAR CHILLERS PRIVATE LIMITED
A Kirloskar Group Company IOM-KAC-ENG - Page 21
The condenser consists of fan. They are designed for maximum efficiency and are statically and
dynamically balanced for vibration free operation. They are directly driven by independent
motors, and positioned for vertical air discharge. The fan guards are constructed of heavy gauge,
rust resistant, coated steel. All blades are statically and dynamically balanced for vibration free
operation.
3.3.3. Electronic Expansion Valve
The KAC systems are equipped with Electronic expansion valve (EXV). Every EXV will:
Expand the high pressure, high temperature liquid refrigerant to low pressure, low temperature
refrigerant and
Precisely feed the required quantity of expanded low pressure, low temperature liquid
refrigerant into the evaporator to maintain the constant super-heat at the evaporator outlet.
The “K-smart’ Controller will calculate the suction refrigerant vapor super-heat at the outlet of
the evaporator by sensing saturated evaporator temperature and suction line temperature through
temperature sensors. The controller will manage the opening of the electronic expansion valve
based on preset suction superheat value. The unit comes with factory-preset super-heat and
normally does not require any field adjustment.
3.3.4. Dry-Expansion Type Evaporator
The KAC units are equipped with compact shell-and-tube type dry expansion evaporators (U-
bundle design). These evaporators are manufactured with the latest technology 9.53 mm (3/8”)
O.D integrally grooved copper tubes having high heat transfer properties. These tubes are
precisely expanded into the tube-sheet to form leak tight joints. For high-performance and
minimum pressure drop values, all evaporators are provided with special pass partition assembly
on refrigerant side and special baffle assembly on liquid side.
3.3.5. Control Center
KAC chillers consist of microprocessor based control section and power section.
a) Power section includes all necessary switchgear components for hermetic type compressor
motor.
b) Control section includes all necessary safety and operating controls necessary for dependable
automatic unit operations.
The control section will automatically control the unit based on the load requirement of the
secondary system, the leaving chilled liquid temperature. Refer the controller operation manual
for details.
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