HEAT RECLAIM CYCLE
The
Heat Reclaim 3-way Valve
(HS), when
energized, routes the superheated discharge
vapor to a remote mounted coil or to a water
heating coil. A check valve in the return lines
prevents reverse flow and refrigerant migra-
tion to the heat reclaim coil. The Heat
Reclaim coil removes superheat from the
refrigerant vapor before it is routed to the
condenser.
RECEIVER PRESSURE AND VAPOR
TEMPERATURE REGULATION
Receiver Pressure
The
Receiver Pressure Regulator Valve
(A9 or
A9B) responds to receiver pressure. If the receiver
pressure decreases below its set point the A9
valve opens, directing hot high pressure vapor
into the receiver. When the receiver pressure
increases to the setpoint the valve will modulate
closed.
Receiver Temperature
The receiver temperature is only controlled when
the Autosurge system has been applied, with
Koolgas defrost. During Koolgas defrost, if the
Koolgas Manifold temperature drops below
85 deg F the A9B Solenoid coil is energized,
forcing the valve to an open position. This allows
hot gas to enter the receiver, thereby regulating
the defrost gas temperature. The solenoid is
controlled by a thermostat responding to the
Koolgas Manifold temperature, and only allowed
to operate during defrost.
REFRIGERATION PROCESS
September 1, 1997
2 - 6
HUSSM ANN CORPORATION • BRIDGETON, M O 63044-2483 • Printed in USA
Figure 2-12 — A9 and A9B Valves
Figure 2-11 — Receiver Pressure Regulation
Figure 2-10 — Heat Reclaim Cycle
Condenser
Heat Reclaim Coil
Discharge
Manifold
Turba-Shed
HS
Figure 2-10 Heat Reclaim Cycle
Turba-Shed
A9B
Valve
BP
Receiver
A9B
A9
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