Heatiator GDST3831I - Manual (Page 15)

15 Heatilator • GDST3831I • 2127-900 Rev. L • 3/13
Figure 3.2 IPI Pilot Flame Patterns
Burner Ignition and Operation
Frequency: Annually
By: Qualifi ed Service Technician
Tools needed: Protective gloves, vacuum cleaner, whisk
broom, fl ashlight, voltmeter, indexed drill bit set, and a
manometer.
• Verify burner is properly secured and aligned with pilot
or igniter.
• Clean off burner top, inspect for plugged ports, corrosion
or deterioration. Replace burner if necessary.
• Replace ember materials with new dime-size pieces.
DO NOT block ports or obstruct lighting paths. Refer to
Section 14 for proper ember placement.
• Verify batteries have been removed from battery back-
up IPI systems to prevent premature battery failure or
leaking.
• Check for smooth lighting and ignition carryover to all
ports. Verify that there is no ignition delay.
• Inspect for lifting or other fl ame problems.
• Verify air shutter setting is correct. See Section 14 for
required air shutter setting. Verify air shutter is clear of
dust and debris.
• Inspect orifi ce for soot, dirt and corrosion. Verify orifi ce
size is correct. See Service Parts List for proper orifi ce
sizing.
• Verify manifold and inlet pressures. Adjust regulator as
required.
• Inspect pilot fl ame pattern and strength. See Figure 3.2
for proper pilot fl ame pattern. Clean or replace orifi ce
spud as necessary.
• Inspect IPI fl ame sensing rod for soot, corrosion and
deterioration. Polish with fi ne steel wool or replace as
required.
• Verify that there is not a short in fl ame sense circuit by
checking continuity between pilot hood and fl ame sense
rod. Replace pilot as necessary.