FireLake 155 Owner's Manual page 31

Multi-oil furnaces single pass/3-pass units
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START UP AND OPERATING MODEL B5 TWO STAGE BURNER
1. Place the 3-position toggle switch on the Burner to "OFF".
with electricity.
position toggle switch on the Burner to "PRIME".
bleed valve on the pump to relieve air, have a shop towel ready, after a few minutes there
will be oil and air sputtering from the bleeder.
Oil will now start filling the line to the burner.
2. Since the oil line is not attached to the burner yet have a bucket ready to catch oil, but be
patient. It may take 20 minutes to prime the pump and get oil to the burner.
3. Once the line is filled you will start catching the contaminated oil at the burner in your
bucket.
When the oil is free of air and debris run another few gallons more and close the
purge valve or connect the oil line to burner.
Burner to "RUN".
4. By now the red light indicating preheating of the oil may have gone off.
wall thermostat to a setting higher than room temperature.
5. The burner motor and 2-stage air solenoid do not activate. They are delayed for three
seconds by the first timer/relay.
6. A bypass circuit for the burner motor centrifugal switch is established for six seconds by the
second timer/relay. The oil solenoid, 300 Watt heater, and green light receive power through
the second timer/relay. Once the burner motor starts it has three seconds to close its
centrifugal switch to establish power to the oil solenoid, 300 Watt heater, and green light. If
the centrifugal switch fails to close, the oil solenoid, 300 Watt heater, and green light will
lose power after six seconds when the second timer deactivates.
7. Air flow through the burner head toward the flame target (Remember the burner motor is not
on to do this) is desired to have best ignition. This may be provided by natural or induced
draft. If this air flow is not present the burner may not light consistently or hesitate and puff
smoke out the viewpoint. If there is a ignition problem, never look directly through or stand
in front of the viewpoint. Any pressure buildup will vent through the path of least resistance,
the view port and stack. Never keep resetting the Primary Control if the flame fails to ignite.
This could create a unsafe condition leading to excess oil in the fire chamber.
8. The air regulator on the burner should be adjusted to allow approximately 16 psi going to
the nozzle while the burner is in full operation. At startup it is normal for the burner air
gauge to climb to 10 psi, hold there for three seconds, and jump to 16 psi after the 2-stage air
solenoid coil is energized. If greater than 12 psi is attained during the first three seconds a
reduction in the air pressure coming to the burner is recommended.
9. The 2-stage air solenoid has a special orifice in it to allow air to pass through at a controlled
The amber and red lights on the slide gun will come on.
Page 31 of 31
Energize the heater circuit
The pump will start.
Close the bleeder when oil runs free of air.
Flip the 3-position toggle switch on the
The burner will start.
Flip the 3-
Open the
If it has, turn the

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