3-1
3. Operating Instructions
3.1 Controls and Indicators
Note: Figures 3.0, 3.1, and 3.2 at the end of this section illustrate the location of
the controls and indicators described in the following paragraphs.
3.1.1 Status Indicators
Control Power (Green Indicator)
This lamp burns continuously whenever power is available to the control system.
GAS 1 (Green Indicator)
This lamp burns continuously whenever the GAS 1 solenoid valve is turned on.
GAS 2 (Green Indicator)
This lamp burns continuously whenever the GAS 2 solenoid valve is turned on.
Vacuum (Green Indicator)
This lamp burns continuously whenever the Vacuum solenoid valve is turned on.
Exhaust (Green Indicator)
This lamp burns continuously whenever the Exhaust solenoid valve is turned on.
Heat (Green Indicator)
This lamp burns continuously whenever the Heater contractor is turned on.
Alarm (Red Indicator)
This lamp burns continuously whenever there is a fault condition.
3.1.2 Control Switches
Power Switch
Actuating this switch causes the control system to perform its power-up
sequence and power to be applied to the furnace system, as long as the Power
Disconnect Switch is turned on and the Emergency Stop Switch is released. The
Control Power Indicator described in 3.1.1 will illuminate.
Emergency Stop Switch
Actuating this switch shuts off the heater power contactor and all valves. To
return the switch to the operating position, rotate the knob in the direction of the
arrows.
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