A U TOSURGE AND BY- PASS VA LV E S
The A9B Valve needs to be working prop-
erly for the A u t o s u r ge Valve to function
during Koolgas Defrost.
The A u t o s urge directs the flow of refrigerant
either through the Receiver (Flow T h r o u g h ) ,
or around the Receiver (Surge) in response to
ambient subcooling obtained in the condenser.
Note: Both the Valve's sensing bulb and its
equalizer line are located upstream of the
Flooding Valve.
The A u t o surge Valve reacts to the condensing
pressure through its equalizer line, and to the
temperature of the liquid refrigerant returning
from the Condenser through a bulb mounted
on the Liquid Return Line up stream of the
Flooding Valve. When the refrigerant temper-
ature returning from the condenser drops
below its condensing temperature, the system
has ambient subcooling. The valve is factory
set at 10˚ F of subcooling and is n o t f i e l d
adjustable.
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 • Printed in USA
CONTROLVALVES Revised August 1, 1996
7 - 12
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