240005126 Rev A 10/27/2005
16
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:
1.
Shut off the electrical power to the furnace.
2.
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).
3.
Restore electrical power to the furnace.
4.
Start the furnace and bleed all air from the fuel oil
lines.
5.
Close the purge valve and fire the unit.
6.
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-1.
7.
When the furnace has reached "
steady state
" (after
approximately 15 minutes). Set combustion air
damper to get a TRACE of smoke.
8.
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. The system
temperature rise will typically range between 65°F
and 95°F. 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.
9.
Turn off the burner. Observing the duct
thermometer in the supply air stream, note the
temperature at which the blower fan stops. Fan
on/off adjustments can be made by moving the
“fan off” and “fan on” levers on the L6064A
Fan/Limit dial. The fan off setting should stop the
blower when the supply air temperature reaches
90° to 100°F. The “fan on” lever is usually set 30°
higher.
To check the operation of the limit switch, for belt
drive units, shut power off to unit and remove the
fan belt, for direct drive units disconnect the neutral
wire from the motor and isolate it, turn power back
on and set the thermostat to call for heat. After
three or four minutes of burner operation, the limit
control should turn the burner off. Shut power off to
the unit, replace fan belt, replace neutral wire, turn
power back on. 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 temperature is reached. Once the
limit has reset, the oil burner will resume operation
and continue until the thermostat is satisfied.
Restore the thermostat setting to a comfortable
temperature.
10.
Set the heat anticipator adjustment in the
thermostat (if so equipped) to the amperage draw
of the heating control circuit as measured at the
"R" and "W" terminals of the thermostat. To reduce
the risk of damaging the heat anticipator, do not
measure this current with the thermostat
connected to the circuit. Measure the amperage by
connecting an ammeter between the two wires that
will connect to the thermostat "R" and "W"
terminals.
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.
