38
EX38DT Installation and Operation Manual
Filters
Dirty filters reduce the
air flow and the
furnace’s ability to
produce heat. The
filters should be
cleaned frequently
during the heating
season.
If the filters become
blocked, the filter
indicator lamp will flash
red and a beep will
sound five times.
Visual Inspection of Flame
Check that the burner flames are operating normally.
The flame can be seen through the circular window.
When operating normally the burner flame should
appear as long, clear, blue, stable, streaks. Yellow
flames or an orange color is abnormal and
maintenance is required.
NORMAL
This direct vent furnace must be inspected
annually by a trained and qualified
professional. Repairs and maintenance must
be performed by a trained and qualified
professional. The trained and qualified
professional must verify proper operation
after servicing.
More frequent cleaning may be required due
to excessive lint from carpeting, bedding
material, etc. It is imperative that control
compartments, burners, and circulating air
passage ways of the furnace be kept clean.
Any screen or guard removed for servicing
the furnace must be replaced prior to
operating the furnace. Clean as follows:
1. Turn heat off. Allow to cool for one hour.
2. Remove the front panel by removing the
five screws.
3. Use pressurized air to remove dust from
the main burner, heat exchanger, and
fan blades.
4. Use a soft, dry cloth to wipe the cabinet.
Do not use wet cloth or spray cleaners on
the burner.
The flue should be inspected annually for
blockages or damage.
Motors are permanently lubricated and do
not need periodic lubrication. Keep fan and
motor free of dust and dirt by cleaning
annually.
Verify proper operation after servicing.
When attaching the front panel, do not clip
or pinch any electric cords to prevent electric
shock.
Exterior Care
Dampen soft cloth with warm water. Wring
water out well and wipe the unit.
Do not use volatile substances such as
benzene or thinners as they may cause
fading of the paint and deformation of the
resin.
Prevent dust from accumulating on the
power cord, side covers, and parts
behind the furnace.
Keep the area around flue terminal free of
snow and ice. The furnace will not
function properly if the intake air or
exhaust is impeded by obstructions.
Refer to “Flue Terminal Clearances” in
section “4.3.2 Clearances.” The
clearance in Ref. A should be maintained
from any snow accumulation.
CAUTION
To clean the filters, the furnace should be OFF and
cool. Remove the filter and clean it using a soft dry
cloth or vacuum. If the filter is greasy wash with warm
soapy water, rinse, and dry completely.
Do not use the furnace without the filters installed.
6. Maintenance
ABNORMAL
Figure 57
Figure 56
Yellow or
orange flames
Flame Rod
Long, clear, blue,
stable flames
Flame Rod
Air Filters
This beeping will repeat every five minutes. Eventually
the furnace will turn off and display fault code 14 on
the control panel display.
Summary of Contents for EX38DT
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