Introduction
1-2
750-297
Profire E/LNE Series Manual
1.3 — Operating Controls
1.3.1 — Control Panel
The control panel contains a flame safeguard programming control, motor starters, relays, time delays, and terminal
strips mounted internally on a panel sub-base. Lights, switches, potentiometers, a control circuit breaker, and flame
safeguard displays are mounted externally on the panel.
1.3.2 — Flame Safeguard Controls
The flame safeguard programmer incorporates a flame sensing cell (scanner) to shut down the burner in the event of
pilot flame or main flame failure. Other safety controls shut down the burner based on sequence of operation as shown
in the manufacturer’s flame safeguard manual.
Component Details
On-Off Burner Switch For gas or oil only.
Fuel Selector Switch Gas-Off-Oil
For combination gas-oil burners only.
a) Gas Position: Selects gas as the firing fuel.
b) Off Position: Burner off.
c) Oil Position: Selects oil as the firing fuel.
NOTE: When changing from oil to gas fuel, allow the programmer to complete
post-purge and shutdown before moving the selector switch to the gas position.
This will allow the interlock circuit to de-energize at either the oil-air pump or
the compressor.
Control Circuit Breaker Supplementary low overcurrent protection only. No larger than 15 amps.
Auto-Manual Modulation Selector
Switch
a) Auto Position: Selects boiler modulation control.
b) Manual Position: Selects 135 ohm potentiometer for manual modulating
control.
Manual Modulating Control 135 ohm Increases or decreases the burner firing rate manually.
Signal Lamps a) Power On (white): Illuminates when the control circuit is energized (pow-
ered).
b) Ignition (amber): Illuminates when the ignition transformer is powered, and
gas pilot valve is energized (open).
c) Main Fuel (green): Illuminates when the main fuel valve or valves (gas or oil)
are energized (open).
d) Flame Failure (red): Illuminates when the flame safeguard system fails to
detect pilot or main flame.
Read the flame safeguard manual and fully understand its contents before attempting to operate this equipment. Failure to
do so may result in serious personal injury or death.
!
Warning
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