Maintenance Instructions; Troubleshooting - Napoleon U405 User Manual

MAINTENANCE INSTRUCTIONS

Turn off the gas at the source and disconnect unit before servicing. Maintenance should only be done when the grill is cool,
to avoid the possibility of burns. A leak test must be performed annually, and whenever any component of the gas train is
replaced.
COMBUSTION AIR ADJUSTMENT - (This must be done by a qualified gas installer.) The air shutter is factory set and should not
have to be adjusted under normal conditions. However, some extreme field conditions may exist that require adjustment. When the air
shutter is adjusted correctly, the flames will be dark blue with light blue tips, and occasional yellow tips.
YELLOW TIPPING
If the burner is getting too little air, the flames will be lazy yellow, and possibly produce soot. If the burner is getting too much air, the
flames will be lifting erratically from the burner and may cause difficulties when lighting.
HOSE - Check for abrasion, melting, cuts and cracks. If any of these conditions exist, do not use gas grill. Have part replaced by your
gas grill dealer, or qualified gas installer.
BURNER - The burner is made from heavy wall 304 stainless steel, but due to the extreme heat and corrosive environment, surface
corrosion will occur. Use a brass wire brush to remove surface corrosion. Clean any blocked ports using an opened paper clip. Do not
enlarge the burner ports. Spiders and insects are attracted to the smell of propane and natural gas. The burner is equipped with an
insect screen on the air shutter, which will reduce the likelihood of insects building nests inside
the burner, but does not entirely eliminate the problem. The nest or web will cause the burner
to burn with a soft yellow or orange flame or cause a fire (flashback) at the air shutter
underneath the control panel. To clean the inside of the burner, it must be removed from the
gas grill. Remove the 2 screws located above the burner to the left and right of the centre of
the burner. Lift back of burner upwards to remove. Use a flexible venturi tube cleaning brush
to clean out the inside of the burner. Shake any loose debris out of the burner, through the gas
inlet. Ensure that the insect screen is clean, tight, and free of any lint or other debris. Check
also that the valve orifices are clean. Do not enlarge the orifices. Re-install the burner. Check
that the valve enters the burner when installing. Replace burner cover and mounting screws to
complete installation.
ALUMINUM CASTINGS - Clean castings periodically with warm soapy water. Aluminum will not rust, but due to high temperatures and
weathering, oxidation can occur on aluminum surfaces. This will appear as white spots on the castings. To refinish the castings, clean
them and sand lightly with fine sandpaper. Wipe surface to remove any residue, and paint with high temperature barbecue paint.
Protect surrounding areas from over-spray. Follow curing directions found on the can.
Problem
Low heat / Low flame when
valve turned to high.
LIGHT BLUE
DARK BLUE

TROUBLESHOOTING

Possible Causes
For propane - improper lighting
procedure.
For natural gas - undersized
supply line.
For both gases - improper
preheating.
BURNER
BURNER PORT
APPROXIMATELY
Solution
Ensure lighting procedure is followed carefully. All gas grill
valves must be in the off position when the tank valve is turned
on. Turn tank on slowly to allow pressure to equalize. See
lighting instructions.
Pipe must be sized according to installation code.
Pre-heat grill with main burners on high for 10 to 15 minutes.
1/2"