Owner's Manual

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Owner’s Manual • 9/20 22
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 tube, inspect for plugged ports, corrosion
or deterioration. Replace burner if necessary.
• Inspect for lifting or other fl ame problems.
• Verify air shutter setting is correct. See Installation
Manual 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.
• Check all accessible gas-carrying tubes, connections,
pipes and other components for leaks.
• Inspect pilot fl ame pattern and strength. See Figure 45for
proper pilot fl ame pattern. Clean or replace orifi ce spud
as necessary.
• Inspect
IntelliFire Plus flame sensing rod for soot,
corrosion and deterioration. Polish with fi ne steel wool
or replace as required.
• Verify IntelliFire Plus micro-amp output. Replace as
necessary.
• Verify that there is not a short in fl ame sense circuit
by checking continuity between pilot hood and fl ame
sensing rod. Replace pilot as necessary.
• Check for smooth lighting and ignition carryover to all
ports. Verify that there is no ignition delay.
Inspect and
ensure the lighting of the main burner occurs within four
seconds of the main gas valve opening.
Figure 4.5 IPI Pilot Flame Pattern