Nordyne O4MD Installation, Operation And Maintenance Manual page 14

Annual Service By Contractor
THE COMBUSTION CHAMBER (FIREPOT) IS
FRAGILE. USE CARE WHEN INSPECTING AND
CLEANING THIS AREA.
The heat exchanger should be inspected periodically and
cleaned if necessary, if cleaning is necessary, SHUT
OFF POWER TO THE FURNACE and remove the
burner. Using a stiff brush with a wire handle, brush off
scale and soot from inside the drum and flue pipe. To
clean the radiator, remove the round covers on the inner
front panel to gain access to the cleaning ports. When
this procedure is done for the first time, carefully cut away
the insulation covering the opening with a sharp knife.
Loosen the nuts on the radiator clean-outs. DO NOT
REMOVE THE NUTS. Remove the covers carefully to
avoid tearing the gaskets. A wire brush can be used to
loosen dirt and debris on the inside surfaces of the
radiator. Clean out all accumulated dirt, soot and debris
with a wire handled brush and an industrial vacuum
cleaner. Before replacing the clean-out covers, inspect
the gaskets. If the gaskets are broken, remove the
remnants and replace with new gaskets. Snug the
cleanout covers. DO NOT OVER-TORQUE THE CLEAN-
OUT NUTS. Replace the inner front panel clean-out
covers.
NOTE: A radiator clean-out assembly inadvertently
dropped into the interior of the furnace can usually be
easily retrieved with a magnet on a wire handle or with a
magnet tied to a string.
Both the direct drive blower motor and oil burner motor
are factory sealed. They do not require annual lubrication.
Inspect the blower fan. Clean if necessary.
Oil Burner Maintenance: Follow the instructions of the oil
burner manufacturer. (See oil burner manufacturer's
instructions supplied with furnace). It is advisable to
change the oil burner nozzle and oil filter on an annual
basis.
The venting system should be cleaned and inspected for
signs of deterioration. Replace pitted or perforated vent
pipe and fittings. The barometric damper should open
and close freely.
All electrical connections should be checked to ensure
tight connections. Safety controls such as the high limit
controls should be tested for functionality. The fan control
should be checked to ensure that the "fan off" function
continues to stop the blower fan at temperatures between
90°F to 100°F.
[_WARNING[
DO NOT ATTEMPT TO START THE BURNER
WHEN EXCESS OIL HAS ACCUMULATED,
WHEN THE FURNACE IS FULL OF VAPOUR,
OR WHEN THE COMBUSTION CHAMBER IS
VERY HOT. NEVER BURN GARBAGE OR
PAPER IN THE FURNACE, AND NEVER LEAVE
PAPER OR RAGS AROUND THE UNIT.
14 153B0801