Fig. 42: Typical Main Burner Flame
Modulating burner flame varies in height from approximately 1/4"
at low fire to approximately 4" at high fire.
For Models with Automatic
Gas Valves
Lighting Instructions
1. Close all gas valves. Turn off electrical power sup-
ply. Wait five (5) minutes.
2. Open manual pilot valve. Turn on electrical power.
Pilot is automatically lighted.
3. Open main gas valve.
4. Set temperature controls to desired temperature.
To Shut Down
Close all manual gas valves. Turn off electrical power.
After Start-Up
Intermittent Pilot System
Checkout
(S8600)
1. Turn on power to the ignition systems and turn gas
supply off.
PILOT
VALVE CONTROL
SHOWN IN THE
MAIN GAS SHUT-OFF
"ON" POSITION
VALVE SHOWN IN
THE "ON"
POSITION
GAS INLET
Fig. 40: Shut Off Valve
Fig. 41: Ignition Module
2. Check ignition module as follows:
a. Set the thermostat or controller above room
temperature to call for heat.
b. Watch for continuous spark at the pilot burner.
c. Time the spark operation. Time must be with-
in the lockout timing period (15 or 90
seconds).
d. Turn thermostat down to end call for heat and
wait 60 seconds on lockout models before
beginning step 3.
3. Turn on gas supply.
4. Set thermostat or controller above room tempera-
ture to call for heat.
5. Systems should start as follows:
a. Spark will turn on and pilot gas valve will open
at once. Pilot burner should ignite after gas
reaches the pilot burner.
b. Spark ignition should cut-off when pilot flame
is established.
c. Main gas valve should open and main burner
should ignite after gas reaches the burner
port.
Inspections
Burners
Clean main burners and air louvers of dust, lint and
debris. Keep boiler area clear and free from com-
bustibles and flammable liquids. Do not obstruct the
flow of combustion and ventilation air. Make visual
check of burner and pilot flame. Yellow flame indicates
clogging of air openings. Lifting or blowing flame indi-
cates high gas pressure. Low flame indicates low gas
pressure.
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