ACS HE Series, Operation And Instruction Manual

Page: 25 / 83

HE Series Central Chillers • 882.03862.00 • 12/02/2021
25
4-9 Refrigeration Circuit and Water Condenser Piping
Water- and remote air-cooled refrigerant condensing differ only in the way the compressed
gas is condensed to a liquid. Shown below is a water cooled version.
The refrigerant is compressed in the
compressor and flows through the discharge line
as a gas to the condenser.
There it gives up its heat as it condenses to a
liquid in the condenser.
Liquid refrigerant from the condenser heat
exchanger flowing in the liquid line passes
through a shut-off valve into a filter/dryer that
removes moisture and other contaminants. After
the filter/dryer the refrigerant passes through a
refrigerant sight glass provided to view the flow
of liquid refrigerant, and to view if the system is
free of moisture. The refrigerant then passes
through the electronic, modulating expansion
valve, which allows the refrigerant to expand
(boil off) and cool (remove the heat from) the fluid
inside of the evaporator.
From the evaporator the refrigerant gas flows
through the suction line back into the compressor.
A modulating electronic hot gas bypass valve is
added standard for freeze protection and safeties only.
The nominal water cooled condenser is designed for 85
⁰
F condenser cooling water supply.
Under normal operation there will be about a 10
⁰
F rise through the condenser resulting in 95
⁰
F
exiting water. To ensure proper water flow through the condenser, ensure the condenser water
pump provides at least 25 PSI or water at a flow rate of 3 GPM per ton of chiller capacity.
Each water cooled condenser is equipped with a two way electronic water regulating valve to
control the amount of water allowed to pass through the condenser in order to maintain proper
refrigeration pressures in the circuit.
1
4
2
5
5