Ultra chef U405 CART, Instructions Manual

Page: 9 / 48

9
www.ultrachefgrills.com
WARNING!
Always wear protective gloves and safety glasses when cleaning your grill.
WARNING!
Turn off the gas at the source and disconnect the unit before servicing. To avoid the possibility
of burns, maintenance should be done only when the grill is cool. A leak test must be performed annually and
whenever any component of the gas train is replaced or gas smell is present.
Maintenance Instructions
We recommend this gas grill be thoroughly inspected and serviced annually by a qualified service person.
Combustion Air Adjustment: (This must be done by a qualified gas installer.) The air shutter is factory set and
should not need adjusting under normal conditions. Under extreme field conditions, adjustments might be
required. When the air shutter is adjusted correctly the flames will be dark blue, tipped with light blue and
occasionally yellow.
• With too little air flow to the burner, the flames are lazy yellow and can produce soot.
• With too much air flow, the flames lift erratically and can cause difficulties when lighting.
Adjusting the air shutter:
1. Remove cooking grids and sear plates and leave lid open. The back cover must be removed for rear tube
burner air shutter adjustment.
2. Loosen air-shutter lock screw located at the mouth of the burner and open or close air shutter as required.
The normal opening settings are:
Main Tube Burner Propane 3/16” (5mm) Rear Tube Burner Propane 3/8” (10mm)
Natural 1/8” (3mm) Natural 1/8” (3mm)
*Infra-Red burners have no air adjustment.
3. Light the burners and set to high. Visually inspect burner flames. When the shutters are set correctly, turn
burners off, tighten locking screws, and replace removed parts. Ensure that the insect screens are installed.
Burner : The burner is made from heavy wall 304 stainless steel, but extreme heat and a corrosive environment
can cause surface corrosion to occur. This can be removed with a brass wire brush.
CAUTION!
Beware of Spiders.
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 reduces the likelihood of insects building nests inside the burner but does not entirely eliminate the
problem. A nest or web can 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
screw (s) that attaches the burner to the back wall. Slide the burner back and up wards to remove.
Cleaning : Use a flexible venturi tube brush to clean the inside of the burner. Shake any loose debris from the
burner through the gas inlet. Check the burner ports and valve orifices for blockages. Burner ports can close
over time due to cooking debris and corrosion, use an opened paperclip or the supplied port maintenance bit
to clean them. Drill out blocked ports using this drill bit in a small cordless drill. The ports are easier to clean
if the burner is removed from the grill, but it can also be done with the burner installed. Do not flex the drill
bit when drilling the ports, as this will cause the drill bit to break. This drill is for burner ports only, not for the
brass orifices (jets) which regulate the flow into the burner. Take care not to enlarge the holes. Ensure the
insect screen is clean, tight, and free of any lint or other debris.
Reinstallation : Reverse the procedure to reinstall the burner. Check that the valve enters the burner when
installing. Replace sear plate mount and tighten screws to complete reinstallation.
Light Blue
Yellow Tipping
Dark Blue
Burner
Burner Port
Approximately
1/2” (13mm)