Trane Horizon OAB Series Installation, Operation And Maintenance Manual page 35

If ignition is not achieved within 10 seconds, the control
valve shuts off the gas and locks out. If the trial for ignition
has been accomplished without ignition, the control shuts
off all outputs and enters lockout. Reset is accomplished
by cycling the power off for a minimum of 5 seconds.
If flame is lost once it has been established, the control will
shut off the gas valve within 0.8 seconds and locks out.
If flame is sensed during a purge period when no flame
should be present, the control will remain in a purge with
the gas valve off until the false flame disappears.
If the gas valve is found to be powered when it should be
off, or not powered when it should be on, the control will
enter lockout with all outputs off. Reset is accomplished by
cycling the power off for a minimum of 5 seconds.
• High Fire Test Following Normal Burner Starting
Sequence
– At ROD override, Heating Control Signal to
100 percent.
– When pressure at PG2 stabilizes, confirm PG1 and
PG2 pressures are within ±5 percent of the
pressures shown on Burner Data Plate.
WARNING
Hazard of Explosion!
Failed gas components could explode or leak
flammable gas which could cause a fire resulting in
death or serious injury or property damage. To avoid
damage to unit if PG1 or PG2 exceed data plate
pressures +5 percent, disable incoming gas using the
manual shutoff valves and ensure incoming pressure is
within nameplate data BEFORE enabling the gas.
WARNING
Risque d'explosion!
Des composants au gaz défectueux peuvent exploser
ou entraîner des fuites de gaz inflammable pouvant
provoquer un incendie résultant en des blessures
graves, voire mortelles, ou des dommages matériels.
Pour éviter d'endommager l'unité si PG1 ou PG2
dépasse les pressions nominales indiquées sur la
plaque signalétique de plus de 5 %, désactivez l'arrivée
en gaz au moyen des vannes d'arrêt manuel et assurez-
vous que la pression entrante est conforme aux valeurs
indiquées sur la plaque signalétique AVANT d'activer
l'arrivée en gaz.
– Record Gas Pressures
• PG1
• PG2
– At ROD, read and record
• Outdoor Air Temperature
• Discharge Air Temperature
• Burner P
– Release Heating Control Signal Override
OAU-SVX005C-EN
• Low Fire Test Following Normal Burner Starting
Sequence
– Override Heating Control Signal to 0 percent
– Confirm PG1 and PG2 pressures are within
±5 percent of the pressures shown on Burner Data
Plate
– Allow a minimum of 5 minutes of operation at
0 percent heating signal
– At ROD read and record
• Outdoor Air Temperature
• Discharge Air Temperature
• Burner P
– Record Gas Pressures
• PG1
• PG2
• Ignition Cycle Test
– Release Heating Control Signal Override
– Complete at least (5) calls for heat
• At each call for heat default heating start-up,
signal is 25 percent
• Following each ignition test and before
attempting the next test monitor, analogue
Heating Control Signal at ROD to be sure heat
signal is released at end of each 90-second
warm-up period
Startup
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