Nordyne Downflow Direct Vent Forced Air Gas Oil Furnaces SERIES M1B - Manual (Page 30)

30
WARNING:
Use of furnace or air conditioning
components that are not included
in the certifi cation of this appliance
may create a hazard, invalidate
the certification, and in many
states, make installations illegal.
Listed NORDYNE air conditioning
components are specifi ed on the
furnace label.
Additional Oil Furnace Maintenance
In addition to the preceding, the following should
be performed by a qualifi ed service contractor
at least once each season for oil-fi red furnaces:
• Replace the oil nozzle with the type nozzle
specifi ed for your furnace.
• Clean, adjust and replace if necessary the
spark electrodes.
• Reset the nozzle/drawer assembly to factory
specifi cations.
• Clean the inside of the furnace heat exchanger
and replace the combustion liner if necessary.
• Clean or replace the oil fi lter element at the
oil tank.
• Adjust the burner for top effi ciency and check
to make sure all fi ttings are leak-tight.
Figure 38. Periodic Cleaning
Figure 39. Roof Jack
Check for
Ice Here
MAINTENANCE
Homeowner Information
• On some closet installations, the return air
opening to the furnace may be on the fl oor,
in the door, in the side wall of the closet, or
any combination of these. The upper grille on
the front of the furnace admits return air to the
blower. Return air must be provided back to
the circulating blower in order to provide air
distribution. See Figure 38.
• Filters - At least twice each season (more often
in dusty areas) remove and clean the air fi lters
with a vacuum or with warm water and soap.
Reinstall when dry. Also clean dust and lint
around furnace and in the furnace vestibule.
• During extremely cold weather, ice may form
on the furnace roof jack (Figure 39). Small
amounts of ice forming on the roof jack
will present no problems to proper furnace
operation. Excessive ice formation could
restrict the combustion air supply to the
burner, causing ineffi cient burner operation.
If excessive ice has formed on the air inlet or
exhaust portions of the roof jack, it must be
carefully removed.
Installer Information
All furnaces need periodic service at the
beginning of each heating season. Call your
serviceman to:
• Remove the air circulator and clean all dust
and lint from the unit with a stiff bristle brush.
• Inspect the combustion chamber blower
compartment, fl ue collar and Roof Jack.
• Check the gas valve (if applicable) and fuel
line connections for leaks.
• Make any adjustments necessary for good
operation.
OPTIONAL ADD-ON AIR CONDITIONING
Whether split system or single package, an
energy-saving NORDYNE Air Conditioner is
available that has been designed specifi cally
for manufactured housing applications and can
best handle your home comfort needs. Ask your
dealer or contractor about NORDYNE add-on
central air conditioning systems.
Single package unit includes cooling coils,
compressor, and vertical discharge fan. This type
of unit connects with the existing home air duct
system (an optional close-off damper is required
with the furnace).
Split system unit with vertical discharge for quiet
operation connects with NORDYNE cooling coil
furnace (optional coil cavity required with “A”
model furnaces).