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30318 R4 9/9/2005
21
OPERATION OF OIL BURNER
Once the furnace flue pipe, electrical
and oil line connections have been
made, use the following instructions to
set the burner:
Shut off the electrical power to the
furnace.
Install an oil pressure gauge to the
pressure port on the oil pump. (Refer to
the oil pump specification sheet
included with the burner instructions).
Restore electrical power to the furnace.
Start the furnace and bleed all air from
the fuel oil lines.
Close the purge valve and fire the unit.
Allow the furnace to warm up to normal
operating temperatures. During this
time, set the pump pressure in
accordance with the data provided in
Appendix A, Table A-2, and A-5.
When the furnace has reached "steady
state" (after approximately 15 minutes).
Set combustion air damper to get a
TRACE of smoke.
Check the system temperature rise.
The temperature rise is the difference
between the return air temperature
measured at a point near the return air
inlet, and the supply air temperature
measured near the furnace outlet. If the
temperature rise is too high, the airflow
must be increased. If the temperature
rise is too low, the fan should be
slowed down.
Turn off the burner. Observing the duct
thermometer in the supply air stream,
note the temperature at which the
blower fan stops. The fan adjustments
can be made by moving the dipswitch
settings on the timer control board for
fan off delay.
To check the operation of the limit
switch, shut off power to the furnace.
Temporarily remove the neutral wire
from the direct drive blower motor.
Restore the electrical power to the
furnace and set the thermostat above
room temperature. After three or four
minutes of burner operation, the limit
control should turn the burner off.
When the limit function test is
complete, shut off electrical power to
the furnace, replace the neutral wire to
the blower fan motor, and then restore
power. The blower fan will start up
immediately. Once the temperature has
dropped and the limit control has reset,
the fan will operate until the fan off time
is achieved. The oil burner will then
resume operation and continue until the
thermostat is satisfied. Restore the
thermostat setting to a comfortable
temperature.
Set the heat anticipator adjustment in
the thermostat (if so equipped), by
removing the "R" or "W" wire to the
thermostat, then reading the amperage
draw between the two wires. Failure to
remove one of the wires from the
thermostat while performing this test
could burn out the heat anticipator.
Set the heat anticipator to the
amperage measured.
NOTE: THE FURNACE SHOULD BE
RUN THROUGH AT LEAST THREE
FULL CYCLES BEFORE LEAVING
THE INSTALLATION, TO ENSURE
THAT ALL CONTROLS ARE
OPERATING PROPERLY AND AS
EXPECTED.
NOTE: ALL JOINTS IN ANY
POSITIVE PRESSURE VENTING
SYSTEM MUST BE CHECKED FOR
LEAKS BEFORE LEAVING THE
INSTALLATION SITE.