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Majestic • MER36MN, MER42MN Owner’s Manual • 2599-981 Rev. B • 5/23
Pilot and Burner Ignition and Operation
Frequency:
Annually
By:
Qualified Service Technician
Tools needed:
Protective gloves, vacuum cleaner, whisk
broom, flashlight, voltmeter, indexed drill bit set, and a
manometer.
• Inspect orifice for soot, dirt and corrosion. Verify orifice
size is correct. See Service Parts List for proper orifice
sizing.
• Verify air shutter setting is correct. See Installation
Manual for required air shutter setting. Verify air shutter
is clear of dust and debris.
• 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.
• Inspect IPI flame sensing rod for soot, corrosion and
deterioration. Polish with 320 grit Emery cloth and/or
3M™ Scotch-Brite Abrasive Hand Pad.
• Verify that there is not a short in flame sense circuit
by checking continuity between pilot hood and flame
sensing rod. Replace pilot as necessary.
• Verify manifold and inlet pressures. Adjust regulator as
required.
• Check all accessible gas-carrying tubes, connections,
pipes and other components for leaks.
• Inspect pilot flame pattern and strength. See Figure 4.2
for proper pilot flame pattern. Clean or replace orifice
spud as necessary.
• Replace Glowing embers with new dime-size pieces.
DO NOT
block ports or obstruct lighting paths. Refer
to appliance installation manual for proper ember
placement.
• 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.
• Inspect for lifting or other flame problems.
• Verify batteries have been removed from battery back-up
to prevent premature battery failure or leaking.
Electrical Service and Repair
WARNING!
Risk of Shock!
Label all wires prior to dis-
connection when servicing controls. Wiring errors could
cause improper and dangerous operation. Verify proper
operation after servicing.
WARNING!
Risk of Shock!
Replace damaged wire with
type 105º C rated wire. Wire must have high temperature
insulation.
NOTE:
Appearance of rock jig, pilot shield and media tray
may vary between appliance models.
Figure 4.2
Pilot Flame
CAUTION!
Risk of Cuts or Abrasions.
Wear protective
gloves and safety glasses during removal and installation.
Sheet metal edges are sharp.
Valve Plate Assembly Removal
Frequency:
As needed
By:
Qualified Service Technician
Tools needed:
Protective gloves, 1/4 inch nut driver,
It may become necessary for a qualified service techni
-
cian to remove the valve plate assembly for valve ser-
vice or replacement. This task should be performed by a
qualified service technician. The refractory panels
do not
need to be removed to access the valve plate assembly.
See Section 9 of Appliance Installation Manual for details.
WARNING! Risk of Fire or Explosion!
Turn off gas to
appliance before removing components. Support gas
line to prevent bending.
