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 system
will be forced into
Surge flow around the
Receiver.
To achieve Flow through the Receiver
follow the steps below:
1. Valve off the high pressure pilot line at
Discharge Manifold
2. Disconnect flex hose at Surge Valve (
A
)
and plug hose with a
1
¼
4
-inch flare plug
(finger tighten).
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
¼
4
-inch flare cap.
6. Open suction pressure pilot line valve at Suction
Manifold.
September 1, 1997
P/N 401789
6 - 13
HUSSM ANN CORPORATION • BRIDGETON, M O 63044-2483 • Printed in USA
Figure 6-16 — Autosurge Valve Connections
Schrader
Valve
Equalizer to
Liquid Line
A
B
Suction
Manifold
Pilot Valve
Element
Service
Valve
Autosurge Valve
Discharge
Manifold
Service
Valve
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