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     10
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 fully on, without   modulating
down in most cases.  The LO and HI
setting has temperature range of ap-
proximately 55  F(12.78  C) to 90  F(32.
22  C),respectively.This is the tempera-
ture at the hydraulic thermostat bulb not
the room temperature.The owner is ad-
vised to determine the particular heat
setting that is desired for comfort, as
heating requirements are different for
every owner.
Attention:If the owner does not want
the main burner to ignite and turns the
gas control knob to the LO setting, the
main burner will still ignite if the
temperature at the hydraulic thermo-
stat bulb drops to 55  F(12.78  C).
If no heat is desired,turn the gas cntrol
knob to the PILOT position.
Main Burner Operation
Description of Gas Control Knob:
OFF position.
PILOT position.
LO/HI will allow the hydraulic thermo-
stat bulb to cycle the heater ON and
OFF.
MANUAL   LIGHTING
PROCEDURE
1.   Follow  steps  4  through  8  under
Lighting  Instructions, page 9.
2.  Press control knob and light
pilot with match.
3.  Keep control knob pressed in
f o r   3 0   s e c o n d s   a f t e r   l i g h t i n g
pilot. After 30 seconds, release
control knob.
OPERATING HEATER
Continued
INSPECTING  BURNERS
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
Figure 13 shows a correct pilot flame pattern.
Figure 14 shows an incorrect  pilot  flame
pattern. The incorrect  pilot  flame  is  not
touching the thermocouple.This will cause
the  thermocouple  to  cool.  When  the ther-
mocouple  cools,  the  heater will shut down.
If   pilot  flame  pattern  is incorrect, as shown
in  Figure  14:
turn heater off (see To Turn  Off Gas to
Appliance, page 9)
 see Troubleshooting (pages 12   through
13).
BURNER  FLAME  PATTERN
Figure 15 shows a correct burner flame
pattern.  Figure 16 shows an incorrect burner
flame pattern. If burner flame pattern is
incorrect:
 
turn   heater    off (see   To   Turn Off   Gas
to Appliance, page 9)
 
see   Troubleshooting,  pages  12
through 13