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MODEL 400 RESTAURANT RANGES TROUBLESHOOTING
OPERATOR’S MANUAL 1182299 REV 3 (05/05) DRAFT PAGE 35 OF 64
TROUBLESHOOTING
Turn on the gas supply to the
range.
Install a manometer on the
pressure tap.
Observe the manifold pressure.
Re-light the pilots and turn on all
the burners.
Manifold pressures are:
Natural gas = 4" water column
Propane gas = 10" water column
Shut off the range burners and
main gas and remove the pressure
tap.
If the pressure is low remove the
cap from the pressure regulator on
the back of the range.
With the gas supply shut off to the
range install a pressure tap on the
manifold in the plugged tap
provided.
Continued from Previous Page
Re-light the pilots.
Replace the pressure tap plug in
the manifold.
Test each burner.
If the flame is rising up off of the
ports adjust the burner shutter
closed.
Propane burners may have a small
amount of yellow tipping. This is
normal.
If the flame is long and yellow
adjust the burner shutter open.
Propane burners may have a slight
popping noise when turned off.
This is normal.
NOTE: Griddle and Hot Top
burners may be long and float
when cold. Allow the top to heat
before making burner adjustments.
Each burner should have a steady
blue flame on each port of the
burner.
Reinstall the top valve cover panel
and knobs.
Install the grates or griddle/hot
tops.
Install the thermostat bulbs into
griddle tops.
Be sure the capillary tubes are
away from burners, flames and
excessive heat.
Clockwise increases the pressure
and counter clockwise decreases
the pressure.