PMP
Oil Furnaces
–
Furnace Manual
670-000-003/1010
23
10
Service and maintenance
(continued)
Annual start up
Follow information below to prevent severe personal
injury, death or substantial property damage:
•
Do not use gasoline, crankcase drainings or any oil
containing gasoline. See burner manual for proper
fuel oil.
•
Do not attempt to start burner when excess oil has
accumulated, when unit is full or vapor or when
combustion chamber is very hot.
•
Do not start burner unless collector box, vent and
burner mounting door are secured in place.
•
Never burn garbage or paper in the furnace.
•
Never leave combustible material around it.
To start furnace
1. Factory burner adjustment and settings may not be suitable for
specific job conditions. Refer to burner manual for burner start
up, adjustment and checkout procedures.
2. Set room thermostat to call for heat.
3. Refer to burner manual for start up.
4. The furnace blower will delay for a short period after burner
starts, until the Limit/Fan switch senses air temperature above
the fan ON setting.
5. Set room thermostat to its lowest setting. Burner should turn off.
6. Furnace blower will continue to run until the Limit/Fan switch
senses air temperature below the fan OFF setting.
7. Set the room thermostat to call for heat again. Allow furnace to
heat to design temperature. Then adjust burner for correct
combustion, using combustion test equipment. Adjust burner for:
Draft: -0.01” to –0.02” water column draft in furnace combustion
chamber.
CO
2
: between 10% and 11 ½ %, with 0 smoke.
Make final burner adjustments using combustion test
equipment to assure proper operation.
8. Check furnace and duct system for proper operation and conditions.
9. Inspect vent system for proper operation.
10. To set Limit/Fan switch:
The blower operates until the air temperature drops below the
fan OFF setting. If the air at the supply registers is too warm at
blower start up or shutdown, lower the fan OFF and ON settings
on the Limit/Fan switch.
To check operation of the limit switch, slide a piece of cardboard
into the furnace filter slot. After a few minutes of operation (not
more than 5 minutes), the burner should shut off (limit switch
open). The blower will operate until the furnace cools down.
Remove cardboard when finished.
11. Complete testing of the burner cad cell control using the
instructions in the burner manual.
