Trane Horizon OABD108 Series - Settings and Adjustments; Operation of the Direct Spark Ignition Control Gas Valve

Startup
34 OAU-SVX005C-EN
Settings and Adjustments
The relay module has three site-configurable jumper
options.
If necessary, clip the site-configurable jumpers with side
cutters and remove the resistors from the relay module.
Notes:
• Clipping and removing a site-configurable jumper
enhances the level of safety.
• Clipping and removing a jumper after 200 hours of
operation causes a non-resettable fault 100. The relay
module must then be replaced.
Operation of the Direct Spark Ignition
Control Gas Valve
On a call for heat, a 30-second pre-purge is initiated. Upon
completion of the pre-purge, the gas valve and 60 Hz spark
are energized. When flame is detected, the control enters
the steady state heating condition. Steady state heating
will continue until the call for heat is satisfied.
Figure 15. Sequence status LEDs
Figure 16. Selectable site-configurable jumpers
Table 7. Jumper options
Jumper # Description Intact Clipped
JR1
Pilot Flame Establishing
Period (PFEP)
10 seconds 4 seconds
JR2 Flame Failure Action Recycle Lockout
JR3 Airflow Switch (1LK) Failure Recycle Lockout
Figure 17. Relay module plug-in diagram
WARNING
Combustible Materials!
Failure to maintain proper clearance between the unit
heat exchanger, vent surfaces and combustible
materials could cause a fire which could result in death
or serious injury or property damage. Refer to unit
nameplate and installation instructions for proper
clearances.
AVERTISSEMENT
Matériaux combustibles!
Tout manquement à l’obligation de maintenir une
distance appropriée entre l’échangeur de chaleur de
l’unité, les surfaces de ventilation et les matériaux
combustibles peut provoquer un incendie pouvant
résulter en des blessures corporelles graves, voire
mortelles, ou des dommages matériels. Reportez-vous
à la plaque signalétique de l’unité et aux instructions
d’installation pour connaître les distances appropriées.