FurnacePros LA-309, Owner'S Manual

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Equipment Operation
2.8.2 IPS Alarms
Inlet Pressure Switches are installed on the process gas manifolds. These switches are normally open. They
close when proper pressure is present in the process gas supply lines.
The current switches are set to open when pressure falls below set points in the following table:
Table 2-7 Initial Alarm Settings
Manifold Pressure
Nitrogen/CDA 60 psi 4 Bar
Forming Gas (option
not included) 60 psi 4 Bar
The pressure switch set points can be adjusted manually. Locate
the switch in the process gas supply line. To increase the set point
turn the wheel clockwise. Turn the top of the switch counter
clockwise to decrease the pressure set point so the alarm will not
occur until the pressure drops to a lower point.
2.8.3 Auto Gas Shutoff (Included option)
This furnace may be equipped with Auto Gas Shutoff. The Auto
Gas Shutoff feature consists of solenoid valves on the process gas supply lines integrated with the furnace.
These valves open and allow Process Gas to flow when Furnace ON is pressed. This feature is designed to
conserve process gas. To shutdown the furnace the operator need only put the system into Cool Down and
press Furnace OFF. When all furnace zones reach 100°C or lower for at least one minute, the furnace shuts
down and the process gas valves close.
Figure 2.8.2 IPS Inlet Pressure Switch
The Auto Gas Shutoff valves fail in the closed position.
10-004 – 676-110000
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