PMP
Oil Furnaces
–
Furnace Manual
22
670-000-003/1010
10
Service and maintenance
(continued)
Service/maintenance procedures
To lubricate and inspect blower motor
DO NOT over-oil motors. Adding too much oil can
damage the motor bearings, resulting in blower
motor failure.
Belt-drive motor: Oil annually, using 3 drops of S.A.E. #10 oil (or
other if specified by motor manufacturer). Blower bearings are
permanently lubricated and do not require oiling. Verify that the
blower, motor pulleys and belt are in good condition. Replace if
necessary.
Direct-drive motor: Oil annually using 2 drops of S.A.E. #10 oil (or
other if specified by motor manufacturer). Oiling is normally not
required until the beginning of the third year of operation.
Clean blower wheel – Vacuum dust from blower wheel blades and
surrounding area.
To clean heat exchanger
The heat exchanger must be cleaned and inspected
at least once each year. Operating the furnace with
a fouled or leaking heat exchanger could result in
severe personal injury, death or substantial property
damage.
The combustion chamber contains ceramic fiber
materials. Wear a NIOSH-approved respirator while
cleaning the furnace and follow WARNING on page
21 for proper handling.
1. Remove the burner and mounting plate.
2. Inspect the heat exchanger using a mirror inserted through the
burner opening.
3. Using a brush on a flexible handle, loosen the soot on the inside
of the heat exchanger.
4. Remove the soot with a vacuum.
5. See page 25 for locations. Remove the heat exchanger cleanout
cover or flue collector box. Using a brush on a flexible handle,
loosen the soot from the heat exchanger surfaces. Remove as
much soot as possible using a vacuum.
6. Replace cleanout cover or flue collector box.
7. Re-install burner and mounting plate.
Obtain gas-tight seals at burner flange and cleanout
plates to prevent possible flue gas leakage and
carbon monoxide emissions, leading to severe
personal injury or death.
Inspect vent system
Thoroughly inspect the entire vent system at least annually,
including horizontal vent pipe and chimney or vertical vent. Ensure
vent system is repaired or replaced if necessary before placing
furnace in operation.
Oiled-bearing burner motors
The burner may need to be lubricated if the motor is equipped with
oiling cups. Refer to burner manual for specific instructions. If
instructed, apply a few drops only of S.A.E. 20 detergent oil (never
use household oils). Do not attempt to “fill up” the oil cup. Over-oiling
can damage the motor.
Optional Blocked vent shut off (BVSO) cleaning
For continued safe operation, the Blocked Vent Shut Off System
(BVSO) is required to be inspected and maintained annually by a
qualified agency.
1.
Disconnect the power to the appliance;
2.
Remove the two screws holding on the BVSO assembly
cover;
3.
Remove the cover;
4.
Remove the two screws holding the thermal switch to the
assembly base;
5.
Without removing the electrical wires, remove the thermal
switch and remove any build-up from the thermal switch
surface;
D
Do not dent or scratch the surface of the
thermal switch. If the thermal switch is
damaged, replacement is required.
6. Clear and remove any build-up or obstruction inside the
heat transfer tube;
7.
Re-mount the thermal switch to the assembly base;
8.
Re-attach the assembly cover with the screws removed in
step 2;
9.
Re-establish power to the appliance.
