CONTROL PANEL OPERATING PROCEDURES
3-9
STEPPER
MOTOR
DETAIL "A"
DIAL
(DETAIL “A”)
BLOWER
BURNER
25
Figure 3-6.
Air/Fuel Valve In Ignition Position
8. With the unit firing properly, it will be
controlled by the temperature controller cir-
cuitry. The FIRE R ATE will be continuously
displayed on the front panel bargraph.
9. Once the demand for heat has been
satisfied, the Control Box will turn off the gas
valve. The blower relay will be deactivated
and the Air/Fuel Valve will be closed.
Standby will be displayed.
3.9. START/STOP LEVELS
The start and stop levels are the fire rate
percentages that start and stop the unit, based
on load. These levels are Factory preset as
follows for natural gas and propane units:
• Start Level: 20% (All units)
• Stop Level: 13% (Natural Gas)
• Stop Level: 16% (Propane)
Normally, these settings should not require
adjustment.
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