Main Burner Malfunctions - Dean SM35 Installation & Operation Manual

DEAN MILLIVOLT SERIES GAS FRYERS (NON-CE)
6.3

Main Burner Malfunctions

A. Main burner will not come "ON"; gas not detected at main burner.
1. Check that the gas valve is open.
2. Check that the pilot is ignited and is operating properly.
3. Check the high limit switch for continuity.
4. The combination gas valve may be defective; replace if necessary.
B. Main burner flames are small and appear lazy; shortening does not come up to temperature
quickly.
1. Check gas pressure at the pressure tap of the gas valve. Use dial type or standard water-
type U-gauge manometer. With burner in operation, the pressure should be 4" W.C. (10
mbar) for natural gas, and 11" W.C. (27.5 mbar) for propane.
2. If not, remove the pressure regulator adjustment cover. Use screwdriver to turn the
adjusting screw for proper pressure. Replace cover, re-check pressure and re-install
pressure regulator adjustment cover.
C. Signs of excessive temperature; shortening scorches and quickly becomes discolored.
1. Check operating thermostat. May be out of adjustment or calibration. Recalibrate if
necessary.
2. Check gas pressure as outlined above.
3. Shortening used is of inferior quality and/or shortening has been used too long. Replace
shortening.
4. Ensure frypot is clean when refilling with new shortening.
D. Fryer will not reach the temperature setting and/or runs erratically.
1. Incorrect location of sensor probe or defective temperature sensor.
2. Loose wiring/wire connection.
E. Fryer shortening temperature cannot be controlled; fryer runs at high-limit temperature.
1. Defective operating thermostat or temperature probe.
2. Call Service Technician.
CHAPTER 6: TROUBLESHOOTING
6-2