c) Insert a duct thermometer to its highest warm air duct
at a point 12 inches downstream from the furnace
plenum. If the limit control is functioning correctly the
burner will shut off on high limit before the thermome-
ter reads 200°F.
d) To begin the test, close all the warm air registers then
block the cold air returns with newspapers.
e) Watch the oil burner and note the temperature of the
warm air when the burner shuts down.
CAUTION:
If the warm air temperatur
e exceeds 200°F without the oil
burner shutting down quickly open the warm air registers
and remove the blockage from the cold air return.
If test procedure did not end with the oil burner cutting
off, the limit control is defective.
If the limit control is defective immediately replace it with
one of the following:
Honeywell - L4064J-5” insertion, limit setting 205°F
positive stop.
W
arning
- If the limit contr
ol is defective the furnace is
unsafe to operate.
Emergency Pr
ocedure
Soot or Chimney Fire
1. Close damper door by unhooking chain.
2. Close fire door.
3. Do not remove flue pipe before fire is completely out.
4. Call the fire department.
Run-A-W
ay Fire
1. Close damper door by unlocking chain.
2. Close fire door.
3. Close off all air from entering the firebox.
4. Fully open barometric damper to reduce draft.
5. Douse the fire with water to reduce the rate of com-
bustion, if necessary.
Power Failur
e
1. Close damper door by unhooking chain.
2. Close fire door.
3. Remove access door at each end of furnace blower
compartment.
4. Open all air registers fully and furnace room door to
give better circulation.
5. Do not load fire box higher than 1/4 way up during
gravity firing.
6. The combustion air can now be supplied by opening
the secondary air control.
7. Open all warm air registers full open. Registers must
not be obstructed by furniture or drapes.
8. Continue to operate a small fire for duration of power
off period. Do not expect to maintain maximum com-
fort under no power conditions. To prevent injury do
not allow anyone who is unfamiliar with the operation
of the furnace attend it.
9. On return to normal power operation, return all altered
items to their normal operating positions.
For more information read labels and manual carefully.
NOTE: THE EXCESSIVE HEAT CAUSED BY AN
EXTREME FIRE MAY DAMAGE THE FURNACE SAFETY
CONTROLS. THEIR OPERATION SHOULD BE CHECKED
BEFORE THE FURNACE IS RETURNED TO SERVICE.
SEE: PROCEDURE FOR CHECKING PROPER FUNC-
TION OF THE LIMIT SAFETY CONTROL.
