System Start-up
The pilot valve is pre-set at the factory for
10
O
F subcooling.
• Valve off pilot while leak testing the system;
excessive pressure can damage the Pilot
Valve Element.
• Do not attempt to field adjust.
On initial start up, valve off the high pressure
pilot line from the Discharge Manifold. Once
the system has stabilized, open the valve.
• Be sure all pilot lines are open.
• Be sure pilot valve bulb has good contact to
the Liquid Return Line, and is well insulated.
• In case of bulb charge loss or pilot failure,
do not attempt to substitute a TEV element.
Emergency Bypass
If the pilot valve fails for any reason, the sys-
tem will be forced into Surge flow aro u n d
the Receiver. To achieve Flow through the
Receiver follow the steps below:
1 . Valve off the high pressure pilot line at
D i s c h a rge Manifold
2 . Disconnect flex hose at Surge Valve (A) and
plug hose with a
1
⁄4-inch flare plug (finger
t i g h t e n ) .
3 . Valve off the suction pressure pilot line at
Suction Manifold.
4 . Disconnect flex hose at Pilot Valve (B) and
reconnect to Surge Valve Inlet (A) .
5 . Cap Pilot Valve Suction Outlet with a
1
⁄4-inch flare cap.
6 . Open suction pressure pilot line valve at
Suction Manifold.
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 • Printed in USA
Revised August 1, 1996 P/N 340272A
7 - 13
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