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THERMOSTAT CONTROL OP-
ERATION
The thermostatic control used on
these models differs from standard
thermostats. Standard thermostats
simply turn on and off the burner. The
thermostat used on this heater senses
the room temperature. The thermo-
stat adjusts the amount of gas flow to
the burner. This increases or de-
creases the burner flame height. At
times the room may exceed the set
temperature. If so, the burner will shut
off. The burner will cycle back on when
room temperature drops below the set
temperature. The control knob can be
set to any heat level between HI and
LO. Selecting the HI setting will cause
the burner to remain fully on without
modulating down in most cases.
NOTE: The thermostat sensing bulb
measures the temperature of air near
the heater cabinet. This may not al-
ways agree with room temperature
(depending on housing construction,
installation location, room size, open
air temperatures, etc.), frequent use
of your heater will let you determine
your own comfort levels.
NONTHERMOSTAT
MODELS
LIGHTING INSTRUCTIONS
1.
S T O P ! R e a d t h e s a f e t y
information, on the side of
heater.
2.
Make sure equipment shutoff
valve is fully open.
3.
Push in control knob slightly and
turn clockwise
OFF position.
4.
Wait five minutes to clear out
any gas. Then smell for gas,
including near the floor. If you
smell gas. STOP! Follow "B" in
the safety information on the
side of heater. If you don't smell
gas, go to the next step.
5.
Push in and turn control knob
counterclockwise
LOT position. Press in control
knob for five (5) seconds.
Note: You may be running this
heater for the first time after
hooking up to gas supply. If so
you may need to press in con-
trol knob for 30 seconds. This will
allow air to bleed from the gas
system.
6.
With control knob pressed in,
push down and release the igni-
tor button. This will light pilot. If
needed, keep pressing ignitor
button until pilot lights.
7.
Keep control knob depressed for
ten (10) seconds after lighting
pilot. If pilot goes out, repeat
steps 5,6 and 7.
8.
To select the desired heating
level, partially press down the
control knob slightly and rotate
counterclockwise
lease the downward pressure on
the knob while continuing to turn
until the knob locks at the desired
setting position. Do not operate
between locked positions.
MATCH LIGHTING INSTRUC-
TIONS
1. Remove any items necessary for
easy access to the pilot (for
example: logs, screens, etc.).
2. Follow appropriate lighting instruc-
tions found previously. Instead of
pushing and releasing the piezo
button, light a match and hold the
flame to the end of the pilot and
to the
ignite the pilot.
3. After control knob has been re-
leased and pilot stays lit, reinstall
any items that were removed for
pilot access.
4. Call a qualified service technician
for repair or replacement of the
piezo ignitor.
to PI-
. Re-
17
INSPECTING BURNERS
Check pilot flame pattern and
burner flame patterns often.
PILOT FLAME PATTERN
Figure 29 shows a correct pilot
flame pattern. Figure 30 shows an
incorrect pilot flame pattern. The
incorrect pilot flame is not touch-
ing the thermocouple. This will
cause he thermocouple to cool.
When the thermocouple cools,
the heater will shut down.
If pilot flame pattern is incorrect,
as shown in Figure 30:
l Turn heater off (see To Turn
Off Gas To Appliance).
HLA or TLA MODELS
Figure 29 – Correct Pilot Flame
Pattern
Figure 30 – Incorrect Pilot
Flame Pattern
Millivolt control
Figure 31 – Correct Pilot
Flame Pattern
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