Pool Boiler: Difference between revisions
→Stage C: Low Air Pressure OK
Matt Parnell (talk | contribs) |
Matt Parnell (talk | contribs) |
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# The automation system relay CR2112 is energized, which activates [[Pool Systems Automation#Digital Inputs|PLC input X12]]. | # The automation system relay CR2112 is energized, which activates [[Pool Systems Automation#Digital Inputs|PLC input X12]]. | ||
NOTE: Flame fail/lockout is not considered here. The present flame sense module (FSM), or "intermittent pilot ignition" module, does not include alarm contacts. The alarm contacts are required to engage R1, the flame fail/lockout relay. This is problematic, as it would allow the ignition transformer to spark indefinitely, eventually resulting in component failure. As a work-around, the automation system provides a monitored lockout function via the <b>Boiler Disable</b> relay. | NOTE: Flame fail/lockout is not considered here. The present flame sense module (FSM), or "intermittent pilot ignition" module, does not include alarm contacts (UTEC 1003-638A). The specified module, a UTEC 1003-61A is unavailable on the market at this time. The alarm contacts are required to engage R1, the flame fail/lockout relay. This is problematic, as it would allow the ignition transformer to spark indefinitely, eventually resulting in component failure. As a work-around, the automation system provides a monitored lockout function via the <b>Boiler Disable</b> relay. | ||
=== Stage D === | === Stage D === | ||