Procom SN250TYLA-D - Manual (Page 10)

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