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Turnoffthe electrical power supply, the manual gas valve
and the manual water control valve whenever servicing the
unit.
Repairs and maintenance should be performed by a
qualified service technician. The appliance should be
inspected annually by a qualified service technician.
Verify proper operation after servicing.
Cleaning
It is imperative that control compartments, burners, and
circulating air passageways of the appliance be kept
clean.
Clean as follows:
1. Turn off and disconnect electrical power. Allow to
cool.
,
3.
4.
,
Remove and clean the water inlet filter.
Remove the front panel by removing 4 screws.
Use pressurized air to remove dust from the main
burner, heat exchanger, and fan blades. Do not
use a wet cloth or spray cleaners on the burner. Do
not use volatile substances such as benzene and
thinners. They may ignite or fade the paint.
Use soft dry cloth to wipe cabinet.
Vent System
The vent system should be inspected at least annually
for blockages or damage.
Motors
Motors are permanently lubricated and do not need
periodic lubrication. Keep fan and motor free of dust and
dirt by cleaning annually.
Temperature Controller
Use a soft damp cloth to clean the temperature
controller. Do not use solvents.
Lime / Scale Build-up
If you receive Error Code "LC", refer to the procedure,
Flushing the Heat Exchanger. Refer to the section on
Water Quality to see if your water needs to be treated or
conditioned. (When checking maintenance code history,
"00" is substituted for "LC".)
Snow Accumulation
Keep the area around flue terminal free of snow and ice.
The appliance will not function properly if the intake air
or exhaust is impeded (blocked or partially blocked) by
obstructions.
Visual Inspection of Flame
The burner must flame evenly over the entire surface
when operating correctly. The flame must burn with a
clear, blue, stable flame. See the parts breakdown of the
burner for the location of the view ports.
The flame pattern should be as shown in the figures
below.
FRONT VIEW
SATISFACTORY
BLUE FLAME
ME ROD
JIlllllllllllllllllllllllllllll I I I I I I
I I
UNSATISFACTORY
FRONT VIEW
YELLOW FLAME
FLAME ROD
Figure 14
28 305 & 505 Indoor Manual