A9 Valve Operation
Downstream Pressure ➀ must be sufficient to
keep Adjustment Spring ➁ from opening
Valve Port ➂. If receiver pressure falls below
the spring set point, the valve port opens,
allowing Upstream Pressure ➃ to fill the
Valve Chamber ➄, opening the Main Valve ➅
(one full turn = 25 psig change).
A9B Valve
Racks equipped with a A9B Valve have no
Bypass Solenoid for Koolgas Defrost
operation. The single A9B valve covers both
functions.
A9B Valve Operation
When the Solenoid is de-energized the valve
operates like the standard A9. When the
solenoid is energized the Solenoid Port ➀
opens, filling the Valve Chamber ➁, and open-
ing the Main Valve ➂ (one full turn = 25 psig
change).
Troubleshooting ReceiverP re s s u r e Regulator
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 • Printed in USA
Revised August 1, 1996 P/N 340272A
7 - 11
Malfunction Cause Action
Fails to Open Set too high Reduce spring tension
Dirt blocking Valve Port Clean or replace
Diaphragm dirty or misaligned Clean, replace or align
Fails to close Set too low Increase spring tension
Dirt in bleed port Clean or replace
Installed backwards Re-install with direction of flow
To Next Page
Loading...
