TM 5-3895-374-24-2EXTENDED PREPURGEOccasionally it is necessary to extend the pre-purge timing on the Flame Safeguard Control to greaterthan 30 seconds. This can be accomplished by adding a time delay relay in the L2/M and D/8 circuitand wired in the following mannerThe maximum extended purge time will be 10 minutes. The maximum time delay setting should be91/2 minutes. If the time delay relay does not close the D-8 circuit within 10 minutes of the start, theFLAME-MONITOR will LOCKOUT and the message will be "LOCKOUT D-8 HI PURGE OPEN."Auxiliary Device In M-D-8 Circuit at Flame Monitor ControlThe function of the low fire start and high fire purge interlock circuits internally in a new Fireye FlameMonitor unit is accomplished by highly reliable solid state electronic circuitry. This prohibits theconnection of power consuming devices (i.e. lamps, annunciators, relays, timers, etc.) to the D or 8terminals.COMBINATION FUEL BURNERSNote: An important safety feature of the FLAME-MONITOR system is the ability to monitor the propertimed operation of critical terminals; fuel valve terminals 5, 6 and 7for instance. Jumpering of theseterminals could therefore cause the control to sense an unusual condition and LOCKOUT.When changing fuels on combination fuel burners if DIRECT SPARK IGNITION is used, it is normalto jumper these terminals. To assure that burner operation is not interrupted in this situation, you mustdo one of the following:1.Interrupt power to L1/L2 momentarily when changing fuels, before the initial burner cycle on thenew fuel.OR2.Install a time delay relay contact in the jumper circuit which is timed to close 3 seconds (minimum)after terminal 6 is energized. This method is only acceptable on programmers labeled "12" or high-er (i.e. datecode 8710-12.)FLAME SAFEGUARD(page 3 - 1053)
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
