Vulcan-Hart SG7800 manual Automatic Shutoff Pilot Instructions, Cleaning

CLEANING

To clean limiting orifice (Fig. 7), turn gas supply to unit OFF. Disconnect pilot tubing at the pilot burner body. The orifice is then accessible at the body end of the pilot burner and can be removed for cleaning. Clean spud, taking care not to enlarge the orifice hole.

Fig. 7

SERVICE INSTRUCTIONS (Fig. 8)

1.If valve fails to open with good pilot flame impinge- ment, replace valve.

2.Do not remove interrupter valve for field service.

NOTE: Make certain gas line to inlet of control is purged of air and that gas flow is available at this point.

THERMOSTATICALLY CONTROLLED GRIDDLE RECALIBRATION

Field recalibration is seldom necessary and should not be resorted to unless cooking results definitely prove that griddle surface temperature and thermostat setting do not agree. To check griddle temperature, use an accu- rate “surface temperature thermometer” in the following manner.

1.Locate thermometer in center of griddle from front to rear: on 17" wide units, use one thermometer and center from side to side; on 34" wide units, use two thermometers, one 8-1⁄2" from each side of the griddle.

2.Set thermostat dial to any temperature and allow griddle to heat thoroughly. When the griddle is com- pletely heated and the burner is on bypass gas, check the thermometer reading against the thermostat

dial setting. If the difference between the readings exceeds 15° F, the thermostat should be recalibrated. Example: With the thermostat dial at 400° F and a thermometer reading of less than 385° F or more than 415° F, the thermostat should be recalibrated.

Recalibration Procedure

Make note of number of degrees thermostat is off. Remove thermostat dial and loosen calibration screws (Fig. 9) until plate moves freely. Turn calibration plate the required number of degrees counterclockwise if the thermometer reading was higher than the dial setting, or clockwise if the thermometer reading was lower than the dial setting. Hold calibration plate in desired position and tighten plate screws firmly. The number of degrees between letters on the calibration plate is 50° F.