Table of Contents
Advertisement
User Interface Display
Installer Menu
APPENDIX A - CONTROL MODULE
Control module logs successful and failed ignition attempts.
Information accessed in 'Ignition Attempts' Screen as shown.
Ignition attempts are stored in non-volatile memory and are
retained in event of power failure.
Figure A-1 Typical Ignition Cycle
Following control features are implemented to ensure safe and
reliable operation of Combustion System:
False Flame
Detection
Re-ignition
Intermittent
Operation
Flame out too
late
Safety relay test
UL3563
High Limit
Temperature
Device
75
Explanation
If flame is detected at end of pre-spark
period (Ignit_0) than lockout will occur.
If at end of safety period no flame
detected control will go to post-purge
removing unburned gas. Re-ignition
attempt started following same cycle.
Number of re-ignition attempts limited
to 3 after which lockout occurs.
Boiler can be firing continuously for 24
hours. Burner switched off and restart
sequence follows.
If flame detected after post purge lockout
follows.
In Safety ON/OFF state correct operation
of safety relay is proved before ignition.
Boiler comes equipped with UL353
approved temperature high limit device.
Gas Valve de-energized when supply
temperature exceeds 203°F lockout
follows.
Advertisement
Table of Contents
Troubleshooting
