13
THERMOSTAT CONTROL
OPERATION
The thermostat control knob can be
set to any comfort level between HI
and LO. The thermostat will gradually
modulate the heat output and flame
height from higher to lower settings,
or pilot, in order to maintain the
comfort level you select. The ideal
comfort setting will vary by household
depending upon the amount of space
to be heated, the output of the
central heating system, etc.
Note: Selecting the Hi setting with
the control knob will cause the
burners to remain all the way on, with-
out modulating down in most cases.
MANUAL LIGHTING
PROCEDURE
1. Follow steps 1 through 5 under
lighting instruction.
2. Stop pressing down on control knob
and light pilot with match.
3. Keep control knob pressed in
for 30 seconds after lighting
pilot. After 30 seconds, release
control knob. Now follow Step 8.
C h e c k p i l o t f l a m e p a t t e r n a n d
burner flame patterns often.
PILOT FLAME PATTERN
F i g u r e 2 0 s h o w s a c o r r e c t p i l o t
flame pattern. Figure 21 shows an
incorrect pilot flame pattern. The
incorrect pilot flame is not touching
the thermocouple.This will cause the
thermocouple to cool. When the
thermocouple cools, the heater
will shut down. If pilot flame pattern is
incorrect, as shown in Figure 21
Turn heater off (see TO TURN
OFF GAS TO APPLIANCE, page 12).
see Troubleshooting, page 15.
Figure 20 -Correct Pilot Flame
Pattern
Figure 22 shows a correct burner
flame pattern. Figure 23 shows an
incorrect burner flame pattern. If
burner flame is incorrect:
Turn heater off (see TO TURN
OFF GAS TO APPLIANCE, page 12).
See troubleshooting, page 15.
Figure 21 -Incorrect Pilot Flame
Pattern
BURNER FLAME PATTERN
Figure 22 -Correct Flame Pattern
with Control Knob Set to High Flame
Figure 23 -Incorrect Flame Pattern
with Control Knob Set to High Flame
WARNING: Turn off heater and
let it cool before cleaning.
CLEANING BURNER
INJECTOR HOLDER AND
PILOT AIR INLET HOLE
The primary air inlet holes alow the
proper amount of air to mix with the
gas. This provides a clean burning
flame. Keep these holes clear of dust,
dirt, lint, and pet hair. Clean these air
inlet holes prior to each heating season.
Blocked air holes will create soot. We
recommend that you clean the unit
every three months during operation
and have heater inspected yearly by a
qualified service person.
We also recommend that you keep
the burner tube and pilot assembly
clean and free of dust and dirt. To
clean these parts we recommend
using compressed air no greater
than 30 PSI. Your local computer
store, hardware store, or home
center may carry compressed air in
a c a n . Yo u c a n u s e a v a c u u m
c l e a n e r i n t h e b l o w p o s i t i o n . I f
using compressed air in a can,
please follow the directions on the
can. If you don't follow directions
on the can, you could damage the
pilot assembly.
1. Shut off the unit, including the
pilot. Allow the unit to cool for
at least thirty minutes.
2 . I n s p e c t b u r n e r , p i l o t a n d
p r i m a r y a i r i n l e t h o l e s o n
injector holder for dust and dirt
(see Figure 24).
3 . B l o w a i r t h r o u g h t h e
ports/slots and holes in the
burner.
4. Check the injector holder
located at the end of the
burner tube again. Remove
any large particles of dust, dirt,
lint, or pet hair with a soft cloth
or vacuum cleaner nozzle.
5. Blow air into the primary air
holes on the injector holder.
6. In case any large clumps of
dust have now been pushed
into the burner repeat steps 3
and 4.
Also clean the pilot assembly. A
y e l l o w t i p o n t h e p i l o t f l a m e
indicates dust and dirt in the pilot
assembly. There is a small pilot air
inlet hole about two inches from
where the pilot flame comes out of
the pilot assembly (see Figure 25).
With the unit off, lightly blow air
through the air inlet hole. You may
blow through a drinking straw if
compressed air is not available.
CAUTION: You must keep control
areas, burner, and circulating air pas-
sageways of heater clean at all times.
Inspect these areas of heater before
each use. Have heater inspected
yearly by a qualified service person.
Heater may need more frequent
cleaning due to excessive lint from
carpeting, bedding material, pet hair,
etc.
CLEANING AND
MAINTENANCE
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