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PS QuarterHorse Series Chillers Page 15
3 Sequence of Operation
Important!
The PS unit has a leaving water temperature range of 50°F to 70°F (10°C to 18°C).
Do not attempt to run the PS unit outside this temperature range
or damage to the unit may occur
.
3-1 Chilled Water Circuit
; Process cooling water supply and return connections are made at the pipe
stubs at the rear of the chiller.
; Warm water returns from the process, passes through the strainer, and enters
the reservoir tank.
; The process water is pumped through the evaporator where it is cooled.
; The coolant flows to the process and returns to repeat the cycle.
; A chilled water bypass assembly between the supply and return lines
guarantees a constant flow through the evaporator during intermittent low or
no-flow conditions.
3-2 Refrigeration Circuit
Liquid refrigerant passes through the thermal expansion valve which allows
the refrigerant to expand and cool the inside of the heat exchanger. The
refrigerant flows through the suction line to the compressor.
The refrigerant gives up its heat as it re-condenses to a liquid in the
condenser and the cycle starts over again.