AEC FSS Series 1.5- 10 HP Fountain Solution Systems - Manual (Page 39)

Page 38 FSS Series Fountain Solution Systems
IAE-600
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.
A hot gas bypass valve is used to control cooling capacity during
intermittent or partial load conditions. This feature contributes
substantially to chiller longevity by eliminating excessive cycling
of the compressor and providing close temperature control.
Note the piping schematics on the following pages.
4-3 Low Thermostat Control
The Low thermostat is a cutout device that protects the chiller
system by shutting down the compressor if the chilled process
solution temperature approaches the particular mixture’s freezing
point. The chilled process water pump will continue to run.
The Low thermostat cutout temperature is set at the factory to
42°F (5.5°C). This is correct for a supply water temperature of
50°F (10°C), the rated capacity operating temperature.
!
CAUTION
Protect the system from freezing with glycol that is
20°F (11°C) below the leaving water temperature set point. Because condensation
may form inside the pump tank and dilute the mixture, the freezing point should
be verified periodically.
Set High/Low thermostat cut-out temperature to 8°F (4.4°C) below the set point
leaving water temperature.
Your AEC, Inc. product warranty does not cover system freeze-ups!