Operating Instructions - Nordyne O4LD-140A-16F Installation, Operation And Maintenance Manual

20. OPERATING INSTRUCTIONS

Before Lighting
1. Open all supply and return air registers and
grilles.
2. Open all valves in oil pipes.
3. Turn on electric power supply
To Light Unit
1. Set the thermostat above room temperature
to call for heat. The burner should start.
NOTE: It may be necessary to press the
RESET button on the primary
control relay.
2. After a short period of time, as
becomes warm enough to act upon the fan
control (L6064A), the blower starts.
3. Set the thermostat below room temperature.
The oil burner stops.
4. The air circulation blower will continue to run
as long as the temperature remaining in the
furnace is higher than the "FAN OFF" setting
on the fan control. Typical "fan on" values
range from 110°F to 130°F. Typical "fan off"
temperatures range between 90°F
100°F. The fan control settings
altered if the air at the room registers is
uncomfortably high or low upon blower start
up or shutdown.
5. Adjustment to the fan control settings should
be based on the temperature of the air at the
supply air take-off or within the first 24 inches
of the supply air trunk duct trunk. The
mid point of the trunk is usually ideal,
providing that the thermometer probe is
beyond the "line of sight" in relation to the
Heat Exchanger, wherein false readings from
radiant heat could be observed. The system
temperature rise,
temperature between the supply air and
return air, should typically range between
65°F and 90°F.
To check the operation of the limit switch, shut
off power to the furnace. Temporarily remove the
neutral wire from the direct drive blower
Restore the electrical power to the furnace and
set the thermostat above room temperature.
After three or four minutes of burner operation,
the limit control should turn the burner off. The
progress towards a high limit shut down can be
monitored by watching the dial on the L6064A
fan / limit control. When the limit function test is
combustion
the furnace
and
may be
side
the difference in
motor.
complete, shut off electrical power
furnace, replace the neutral wire to the blower
fan motor, and then restore power. The blower
fan will start up immediately.
temperature has dropped, the oil burner will
resume and continue until the thermostat is
satisfied. Restore the thermostat setting
comfortable temperature.
To Shut Down Unit
1. Set the thermostat to the lowest possible
setting.
2. Set the manual switch (if installed)
Electrical Power Supply Line to "OFF".
NOTE: IF THE FURNACE IS TO BE SHUT DOWN
FOR AN EXTENDED PERIOD OF TIME,
CLOSE THE OIL SUPPLY VALVE TO THE
BURNER.
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.
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