State SBD85 500PE - Manual (Page 25)

25
seQuence of operation
The following information will describe the Sequence of Operation
for this appliance.
1. Switch power on to unit.
2. Thermostat calls for heat.
3. Ignition Control Board performs diagnostic check on system
components.
4. On completion of diagnostics check, the Ignition Control Board
sends signal to exhaust Inducer.
5. exhaust Inducer begins drawing air through appliance closing
the Prover Switch.
6. On completion of Prover Switch engagement, the Ignition
Control Board begins the ignition cycle.
7. The Ignition Control Board provides power to the Silicon
Nitride Igniter.
8. The Silicon Nitride Igniter heats up for approximately 17 to
20 seconds.
9. At the end of Silicon Nitride Igniter’s warm-up, the Ignition
Control Board opens the Gas Valve.
10. From the time the Gas Valve opens, the Ignition Control Board waits
3 seconds and then shuts off power to the Silicon Nitride Igniter.
11. From the time the Silicon Nitride Igniter’s power is shut off,
the Ignition Control Board waits 3 more seconds to monitor
the Flame Sensor.
12. If the Flame Sensor does not detect a strong enough flame,
the Ignition Control Board shuts off the Gas Valve and allows
the exhaust Inducer to purge the unit for 20 seconds. At that
time, the Ignition Control Board restarts with step 7. It will try
and ignite the main burners 2 more times. If the unit does not
light, the Ignition Control Board will wait one hour and then
restart at step 3. This cycle will continue until the unit lights or
the power is shutoff to the unit.
13. If the Flame Sensor detects a strong flame, the Ignition Control
Board will allow the unit to operate until the thermostat is satisfied.
14. Once the unit is satisfied, the Ignition Control Board will shut
off the Gas Valve and the unit will be in standby mode until
another call for heat is initiated by the thermostat.
See the flow chart on page 26 for more information.
lighting & operation laBel
FLAMMABLE
If you do not follow these instructions exactly, a fire or explosion
may result causing property damage, personal injury, or loss of life.
WARNING
OPERATING INSTRUCTIONS
FOR YOUR SAFETY READ BEFORE OPERATING
A.
1.
6.
2.
C.
D.
B.
This appliance does not have a pilot. It is equipped with an ignition device which
automatically lights the burner. Do not try to light the burner by hand.
"WHAT TO DO IF YOU SMELL GAS"
BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell
next to the floor because some gas is heavier than air and will settle on the floor.
Do not try to light any appliance.
If you cannot reach your gas supplier, call the fire department.
Use only your hand to push in or turn the gas control knob. Never use tools. If
the knob will not push in or turn by hand, don't try to repair it. Call a qualified
service technician. Force or attempted repair may result in a fire or explosion.
Do not use this appliance if any part has been under water. Immediately call a
qualified service technician to inspect the appliance and to replace any part of
the control system and any gas control which has been under water.
Do not touch any electric switch; do not use any telephone in your building.
Immediately call your gas supplier from a neighbor's telephone. Follow the
gas suppliers instructions.
FOR YOUR SAFETY READ BEFORE OPERATING
STOP! Read the safety information above on this label.
Set thermostat to lowest setting.
5.
1. 3.
3.
4. Turn off all electric power to the appliance.
This appliance is equipped with an ignition device which automatically lights
the burner. Do not try to light the burner by hand.
GAS
CONTROL
KNOBS
Push in gas control knobs slightly and turn clockwise to off.
7.
8.
9.
10.
Wait five(5) minutes to clear out any gas. If you then smell gas, STOP!.
Follow "B" in the safety information above on this label. If you don't
smell gas, go on to next step.
Turn gas control knobs counterclockwise to "ON".
Turn on all electric power to the appliance.
Set thermostat to desired setting.
If the appliance will not operate, follow the instructions "To Turn Off Gas To Appliance"
and call your service technician or gas supplier.
Set the thermostat to lowest setting. Push in gas control knobs slightly and turn clockwise to "OFF". Do not force.
2. Turn off all electric power to appliance if service is to be performed.
OFF
IN
PSI
IN
PSI
OFF
ON
ON
figure 23.