Manual

4 BG1100M Direct Spark Ignition Control Installation Instructions
Setup and Adjustments
Checkout
!
WARNING: Risk of Explosion or Fire. Verify that
there are no gas leaks by testing with appropriate
equipment. Never use a match or lighter to test for the
presence of gas. Failure to test properly can lead to an
explosion or fire and may result in severe personal injury
or death.
Make sure all components function properly by performing
the following test.
1. Before starting the appliance, perform a safety
inspection of piping, burners and venting. Check for
water leaks, etc. Check all wiring for proper
connections. Be sure the system is properly grounded,
including ground connection to the pilot burner.
2. With the gas and thermostat off, turn on power to the
appliance.
3. Turn the thermostat to a high setting and verify that the
control goes through the operating sequence to a
shutoff condition.
Note: The burner does not light because the gas is
off.
4. Turn off the thermostat.
5. Turn on the gas and purge gas lines of all air.
6. Check for gas leaks on all pipe joints upstream of the
gas valve with a soap solution.
7. Turn the thermostat to the highest setting and verify
successful ignition and a normal run condition for at
least 5 minutes. If the appliance fails to run, see the
Troubleshooting section.
8. Check for gas leaks on all pipe joints downstream of
the gas valve with a soap solution.
9. Turn the thermostat down for at least 30 seconds and
then back up again. Verify successful ignition at least
five times.
10. Return the thermostat to a normal temperature setting
before leaving the installation.
!
WARNING:
The control module can not be serviced by user. If any
faults are detected, the control module must be replaced. If
control module has been opened or any attempts to repair
are done, the warranty is void.
Operation
Operating Mode Definitions
The following definitions describe the BG1100M operating
conditions.
• Prepurge: Initial time delay between thermostat contact
closure and activation of the spark circuit and valve.
• Trial for Ignition: Total time the valve is energized and
spark/sense sequence is activated in an attempt to light
the pilot. The control attempts to prove flame within the
trial-for-ignition time.
• 100% Shutoff: If the control does not prove the
presence of burner flame within the trial for ignition, the
spark circuit and valve are de-energized.
• Recycle: If 100% shutoff occurs, the control delays for a
specific recycle delay period before beginning another
trial for ignition (models with recycle only).
• Run: Valve is energized and spark turns off after pilot
flame is proven. The valve remains energized until the
thermostat is satisfied.
• Flameout: Loss of proven flame. Should a flameout
occur, the valve de-energizes and spark recurs within
2.0 seconds.
• Lockout: An internal or external fault has caused the
control to de-energize the spark circuit and valve relay.
The thermostat contacts must be opened for 30 seconds
and then closed to begin another trial for ignition.
• Inter-Purge: Period between trials for ignition when both
the gas valve and spark are de-activated to allow
unburned gas to escape before the next trial.
Sequence of Operation
When a call for heat from the thermostat turns on, after a 1
second maximum diagnostic period, the prepurge period will
start. During the prepurge period, the LED will blink 1/2
second “On” and 1/2 second “Off”. At the end of the
prepurge period the spark will start and the gas valve will
turn on starting with the trial for ignition period.
During the trial for ignition period, the control sparks for 4
seconds while rapidly flashing LED. It then turns off the
spark and LED for 1 second while checking flame sense.
This cycle will repeat until flame is detected or trial time is
over.
When flame is detected, the spark will stop, the valve will
turn on and the LED will stay on continuously. The control
will remain in this state until the flame is lost or the call for
heat ends. If flame is lost, LED and valve are turned off for
0.5 seconds and a new trial for ignition sequence will start.
If flame is not detected during the trial for ignition period, the
valve will be shut off. The control will go into lockout, flashing
the LED until the call for heat ends, removing power.