Lennox International Inc. o23v - Manual (Page 22)

Page 22
VII−MAINTENANCE
CAUTION
Never operate unit with access panels to the
blower compartment off or partially open.
A−Filters
If throw-away type filters are used, check monthly and
replace when necessary to assure proper furnace op-
eration. Replace filters with like kind and size.
If reusable type filters are used, check monthly and clean with
water and mild detergent when necessary. When dry, they
should be sprayed with filter handicoater prior to reinstallation.
Filter handicoater is RP Products coating no. 418 and is avail-
able as Lennox part no. P-8-5069 or cat no. 30165.
B−Cleaning Heat Exchanger
NOTE−Use papers or protective covering in front of fur-
nace while cleaning furnace.
Cleaning the heat exchanger is made easier with a heat
exchanger clean-out kit ABRSH380 (catalog # 35K09)
available from Lennox.
1− Remove vent pipe from furnace.
2− Remove locking screws and caps from cleanout
tubes. Remove vent access elbow.
3− Using a long spiral wire brush, sweep down the outer
drum of the heat exchanger. Then using the hose at-
tachment, vacuum out loose debris.
4− Remove locking screw and cap from the observation
tube and with the spiral wire brush, reach upward to-
ward the rear of the heat exchanger to clean out the
crossover tube.
NOTE− Do not attempt to clean the combustion chamber.
It can be easily damaged.
5− Replace the cleanout caps and vent access elbow.
Make sure locking screws are secure.
6− Brush out and vacuum the vent outlet area of the outer
drum and replace vent pipe.
7− Clean around the burner, blower deck and vestibule
area.
C−Annual Burner Maintenance
IMPORTANT
The homeowner should be instructed to have
burner inspected at the beginning of every heat-
ing season.
1− Replace the oil supply line filter.
2− Remove and clean the pump strainer if applicable.
3− Replace the nozzle with an equivalent nozzle.
4− Check the pump pressure when changing nozzle.
5− Clean and inspect the electrodes for damage, re-
placing any that are cracked or chipped.
6− Clean the combustion head of all lint and soot.
7− Inspect the transformer cables and connectors.
8− Remove and clean the cad cell.
9− Clean the blower wheel and the air control of any lint.
10− Check all wiring for secure connections or insulation
breaks.
11− Re-adjust the burner as described in section IV of this
manual.
D−Supply Air Blower
1- Disconnect power to unit.
2- Check and clean blower wheel.
3- Motors are prelubricated for extended life; no further lu-
brication is required.
E−Vent Pipe
The vent pipe should be inspected annually. Remove and
clean any soot or ash found in the vent pipe. Vent pipe dete-
riorates from the inside out and must be disconnected in or-
der to check thoroughly. Inspect pipe for holes or rusted
areas. Inspect the vent control device and replace if found
defective. Check for tightness and to make sure there is no
blockage or leaks.
F−Electrical
1- Check all wiring for loose connections.
2- Check for correct voltage at unit (unit operating).
3- Check amp-draw on blower motor.
Motor Nameplate_________Actual_________
4- Check to see that heat is operating.