Maytag POF1HD091AVFA, Installation, Operation And Maintenance Manual

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-1. 

When the furnace has reached "

steady state

" (after 

approximately 10 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

. The system temperature rise is listed on the 

furnace rating plate. 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. 

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