CONTROLS
2-11
Model C152 & C161
Controls
2
Valve Functions
Table 2-3
Comp Label Description Function Basic Operating Logic
Input/
Output
Evaporator
Pressure
Regulators
(EPR)
Inlet Pressure Upstream
Regulator
Limits the minimum
refrigerant pressure in the
hopper (currently set to 60
psig).
Limiting the minimum refrigerant
pressure in the hopper prevents
freezing of product mix on the
hopper wall.
Filter/Dryer Keeps moisture, dirt, metal,
and chips from entering the
refrigerant flow control
valves.
Heat Exchanger
(subcooler)
Allows the liquid refrigerant
to be cooled before it
reaches the automatic
expansion valve (AXV),
and thermostatic expansion
valve (TXV).
When the liquid is subcooled
before it reaches the refrigerant
control, the refrigeration effect per
machine mass of refrigerant is
increased.
Automatic
Expansion Valve
(AXV)
Automatic Expansion Valve of the
Freezing Cylinder Circuit
Controls the refrigerant flow
during the cooling of the
freezing cylinder.
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