PAGE 35 of 79 VULCAIN OIL-FIRED HEATER
LAST UPDATED: JAN 22-2019 COPYRIGHT © SAMUEL JACKSON, INCORPORATED 2018 ALL RIGHTS RESERVED
AIR SYSTEM (& FAN INTERLOCK) TEST
The operations of the Air Flow Transducer (AFT) and Fan Interlock Relay (FIR) are
checked here. To adjust and test the air flow range settings for the AFT, touch the page
back button
(
)
to go back to the Test Program screen, then touch the
button to go
back to the HEATER SETUP screen. Now press the “ANALOG SETTINGS” button and
then ANALOG CARD 2 button. This will take you to the ANALOG CARD 2 setup
screen.
Observe the Air Flow (V.P.) reading. This is the velocity pressure through the burner
body in the area of the burner heads. The velocity pressure should be about 0.4 inches
water column.
If the V.P. is too low, the flame may be wavering and the Air Flow Transducer AFT not
responsive. If the VP is too high, the burner may be hard to light requiring a higher
setting of the low fire switch LFS position, and burner may roar at high output.
Now go back to the TEST PROGRAM and the AIR SYSTEM TEST screen. Both lights
should be green. If the Air Flow Transducer light is red, the range settings for the air flow
or the airflow itself may need to be adjusted. If the Fan Interlock light is red, the fan
interlock (FIR) is not working.
FUEL SYSTEM TEST
Operation of the atomizing air valve, combustion air fan, oil pump, oil valve, and fuel
valve motor (FVM) are checked here. Each component may be tested as follows:
Atomizing Air Valve:
Open the Atomizing Air Valve. Check that the atomizing air
pressure reading is displayed on the right side of the page and shows a reading of 80 PSI.
You should also hear a loud hiss if the gin is quiet enough and the PLC light for Y12
should light up. Close the valve or leave it open before checking other components.
Combustion Air Fan:
Turn on the Combustion Air Fan. Check that the combustion air
velocity pressure reading is displayed on the right side of the page and shows a reading of
2” water column. You should also hear a loud roar while the fan is on, and the PLC light
for Y16 should light up. Turn the fan off or leave it on before checking other
components.
Oil Pump:
Turn on the Oil Pump. Check that the fuel pressure reading is displayed on
the right side of the page and shows a reading of 60 PSI. While the oil pump is on, the
shaft on the motor below the electrical control panel should be spinning and the PLC
light for Y17 should light up. If the gin is quiet, you may also hear the motor turn. Turn
the pump off or leave it on before checking other components.
Oil Valve:
Open the Oil Valve. The light for Y13 on the PLC should light up. If the gin
is quiet, the valve below the electrical cabinet should be heard clicking on and off. If the
gin is loud, it is also possible to feel the valve open and close as the oil valve is turned on
or off. Close this valve after it has been checked to prevent fuel pooling in the heater.
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