Majestic MERC32VN Owner's Manual page 17

Control Compartment and Firebox Top
Frequency: Annually
By: Qualifi ed Service Technician
Tools needed: Protective gloves, vacuum cleaner, dust
cloths
• Vacuum and wipe out dust, cobwebs, debris or pet hair.
Use caution when cleaning these areas. Screw tips that
have penetrated the sheet metal are sharp and should
be avoided.
• Remove all foreign objects.
• Verify unobstructed air circulation.
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 material with new dime-size pieces.
DO NOT block ports or obstruct lighting paths. Refer
to appliance installation manual 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 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.
• Inspect pilot fl ame pattern and strength. See Figures 4.2
and 4.3 for proper pilot fl ame pattern. Clean or replace
orifi ce spud as necessary.
• Inspect thermocouple/thermopile or IPI fl ame sensing
rod for soot, corrosion and deterioration. Polish with fi ne
steel wool or replace as required.
• Verify thermocouple/thermopile millivolt output. Replace
pilot as necessary (Standing pilot only).
• 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 (IPI only).
Majestic • MERC32IN, MERC32IL, MERC32VN, MERC32VL Owner's Manual • 2401-981 Rev. E • 12/16
Figure 4.2 IPI Pilot Flame Patterns
Figure 4.3 Standing Pilot Flame Patterns
17