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SERVICE 500 SERIES RESTAURANT RANGES
PAGE 20 OF 44 OWNER’S MANUAL 1188716 (02/07)
TROUBLESHOOTING OPEN-TOP BURNERS
Each open-top burner should have a steady blue flame on each port of the burner. Propane burners may have a small
amount of yellow tipping, and may make a slight popping noise when turned off.
If the flame is rising up off of the ports, adjust the burner shutter so it is more closed. If the flame is long and yellow
adjust the burner shutter so it is more open.
Consult the following table and the flowchart on this page.
Problem Look for -
No burners or pilots in the range will turn on. – Main gas supply to range is OFF.
All burners produce excessive carbon deposits. – Incorrect gas type supplied to range.
– Incorrect supply pressure.
Only some burners in a range produce excessive carbon
deposits.
– Incorrect orifices.
– Primary air not adjusted properly.
Only some pilots produce excessive carbon deposits. – Pilot gas not adjusted properly.
– Incorrect pilot orifice.
Top burner will not come on, but oven will come on. – Control valve for top burner is in OFF position.
– Pilot out.
Open-top burner pilot will not stay ignited. – Pilot gas not adjusted properly.
– Clogged orifice.
– Draft condition.
– Improper ventilation system.
– Air in gas line.
– Thermocouple bad.
Figure 8
Troubleshooting Open-Top Burners
Open-top burners are not working correctly.
Check that the burners are set level in their support brackets.
Check that each burner valve and orifice is in alignment with the
corresponding burner.
Remove each burner and check that the venturi is clean and free of
buildup and debris. Also check that the orifice size is correct and
that it is clean and free of buildup and debris.
Check that the burners are clean and that their ports are clear.
Remove the burner control knobs and carefully lower the valve
panel. CAUTION! Convection oven models have wiring attached
behind the
p
anel.
Check the pressure of the gas supply with all the gas appliances
connected to the supply turned fully on. The inlet pressure (before
entering the pressure regulator for the range) must be in the range
3.5" to 5" W.C. (0.87 to 1.24 kPa) for natural gas, or in the range
10" to 11" W.C. (2.48 to 2.73 kPa) for propane. Adjust the pressure
and/or capacity of the gas supply, if necessary.
Check the pressure of the gas manifold of the range (after the gas
leaves the pressure regulator for the range). See page 25.