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Istruzioni per l'uso Southbend, Modello HDG-72

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4. Repeat Step 3 for each pilot. 5. Replace the control panel and knobs. Figure 17 Pilot Flame Adjustment Screws ADJUSTMENTS OWNER’S MANUAL 1182845 REV 8 PAGE 29 ADJUSTMENTS HEAVY DUTY COUNTERLINE ADJUSTMENTS ADJUSTMENT OF BURNER FLAME The burners are adjusted at the factory. If necessary to adjust the burner flames, do the following for each burner: 1. Turn the burner’s control knob to the full ON position. 2. If the appliance was cold, wait 5 minutes before adjusting the burner flame. 3. Loosen the set screw that holds the sheet-metal air shutter in place. 4. If the burner flame is blowing or lifting off the burner ports, close the air shutter until a stable flame is obtained. If the flame is yellow-tipping, open the air shutter until a stable blue flame is obtained (a small amount of yellow-tipping is normal when using propane gas). 5. Tighten the set screw that holds the sheet-metal air shutter in place. 6. Repeat Steps 1 through 5 for each burner. When adjusting the burners of griddle models, note that over-gassed burners DO NOT heat griddles as efficiently as those that are properly adjusted and also create “hot spots” on the griddle surface. Floating and unstable burner and pilot flames will result when solid tops are lowered into position because the rear openings of the burner compartment are not adequate to vent the enormous flue products generated by over-gassed burners. The “unburned” gas will ignite at the rear and burn in this section and even up inside the backguard or shelf venting system, causing structural members in this area to deteriorate. Also, some of these hot flue products will vent forward into the manifold compartment resulting in problems with valves and thermostats due to overheating. AGAIN, over-rated burners waste energy and cause service problems. CONVERSION FROM ONE TYPE OF GAS TO ANOTHER Each appliance is shipped gas-specific either for use with natural gas or for use with LP gas (propane). To convert an appliance from one type of gas to another, do the following: 1. Remove the front panel by removing the knobs and screws on the front. 2. For each burner, replace the orifice with the type appropriate for the type of gas that will be used. For special gas mixtures, and for altitudes above 2,000 feet, consult factory for appropriate orifice sizes. 3. For griddle models only, replace all the pilot assemblies. 4. Re-install the front panel. 5. Remove the hex-threaded plug from the pressure regulator (on the rear of the appliance). Inside is a removable insert. Pull the insert out, turn it around, and put it back in so that the end facing out has the letters corresponding to the type of gas that will be used (“NAT” or “LP”). Re-attach the hex-threaded plug. 6. Check the manifold pressure (the procedure is on page 28). Note: A kit for conversion to a different type of gas may be purchased from Southbend. PAGE 30 OWNER’S MANUAL 1182845 REV 8 HEAVY DUTY COUNTERLINE ADJUSTMENTS ADJUSTMENT OF GRIDDLE THERMOSTATS Each burner’s control knob operates a snap-action thermostatic valve that was adjusted at the factory. If the griddle surface temperature is different from the thermostat dial setting, adjust the valve using the following procedure: 1. Turn all the control knobs to the 300°F. 2. Wait 30 minutes (or 1 hour if the griddle was cold). 3. Place a reliable thermometer or test-instrument thermocouple (able to register 300°F) halfway back from the front to the back of the griddle and directly over a burner (in line with the burner’s control knob, see Figure 18 below). Check the temperature over each burner every five minutes until the temperature over each burner stabilizes and does not change by more than 30°F between two consecutive measurements. 4. If the average temperature over any burner is not within 30°F of the knob setting (300°F), adjust the corresponding thermostatic valve. To do so, remove the knobs and control panel, adjust the calibration screw on the thermostatic valve (see Figure 18 below), replace the knobs and control panel, then repeat Step 3. Figure 18 Measure each temperature halfway back from front to back and directly over the corresponding burner (in line with the control knob). or clockwise to decrease the temperature. Calibrate the valve using the Thermostat Calibration Screw located at the base of the stem. Turn the screw counterclockwise to increase the temperature, ADJUSTMENTS OWNER’S MANUAL 1182845 REV 8 PAGE 31 TROUBLESHOOTING TROUBLESHOOTING HEAVY DUTY COUNTERLINE TROUBLESHOOTING Consult the following table for troubleshooting guidance. Problem Look for No burners or pilots will turn on – Main gas supply to unit is “OFF” Problem with a particular burner – Valve for that burner in “OFF” position – Pilot out – Burner not level in support brackets – Clogged burner ports – Clogged burner venturi – Clogged burner orifice – Wrong type of burner orifice – Burner orifice out of alignment with burner Griddle will not heat up – Main gas supply to griddle is “OFF...