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Resumen del manual
NAT. GAS MODEL 1451 120VAC 60 HZ. LP GAS POWER SUPPLY Electrical power is supplied to the oven by a three conductor cordset. Voltage from the black conductor to the white conductor is 120VAC. The white conductor is neutral. The green conductor is ground. CONTROL BOX AUTO When the temperature in the control box reaches 120°F ± 3° (48.9°C ± 1.7°C), COOL DOWN the cooling fan thermostat will switch power to the control box cooling fan. The thermostat will interrupt power to the cooling fan when the control box temperature falls to 100°F ± 3° (37.0°C ± 1.7°C). MAIN FAN CIRCUIT Electrical power is permanently supplied, through a 10 Amp fuse, to the normally open contacts of the oven power switch. Power is also supplied to the normally open control box cooling fan thermostat. Closing the oven power switch supplies 120VAC to the main fan motor and to the control box cooling fan. Closing the oven power switch also supplies 120VAC to the burner blower motor, the primary of the oven control transformer and to the centrifugal switch of the main fan motor. BURNER CIRCUIT Closing the oven power switch supplies 120VAC to the burner blower motor and to the normally open centrifugal switch of the main fan motor. As the main fan motor reaches approx.900 RPM, the centrifugal switch closes supplying 120VAC to the oven control and to the primary of the burner transformer. The transformer secondary supplies 24VAC, through the centrifugal switch of the burner blower motor, to the ignition control. IGNITION CONTROL When the ignition control is supplied with 24VAC, the pilot valve and spark igniter are energized. Ignition should now occur. After the pilot flame is proven, the main valve is energized. TEMPERATURE CONTROL Closing the oven fan switch supplies 120VAC to the primary of the control transformer and, through the centrifugal switch of the main fan motor, to the oven control. Secondary voltage, 24VAC, is supplied to the oven control. The oven control is set to desired temperature. The thermocouple will provide varying millivolts to the oven control. The oven control supplies 120VAC to the temperature regulation valve at intermittent intervals to maintain the desired temperature. The display on the oven control will indicate when the temperature regulation valve is energized. NOTE: The display also indicates oven temperature. CONVEYOR DRIVE Closing the oven power switch supplies 120VAC to the conveyor motor and to the primary of the control transformer. Secondary voltage, 24VAC, is supplied to the oven control. Setting the oven control to the desired time outputs voltage, through a reversing switch, to the conveyor motor. NOTE: The conveyor system uses a hall effect sensor and magnet to prove operation of the conveyor motor. If the conveyor motor is not running, “BELT JAM” is indicated on the display. Impinger I – 1450 Series Service Manual - Domestic SCHEMATIC DIAGRAM MODEL 1450, 1451 SERIAL NUMBER N28654 AND ABOVE Impinger I – 1450 Series Service Manual - Domestic TROUBLESHOOTING GUIDE IMPINGER ADVANTAGE GAS OVENS SERIAL NUMBER N28654 AND ABOVE (OVENS WITH PUSH BUTTON CONTROLS) SYMPTOM POSSIBLE CAUSE EVALUATION Oven fan will not run Incoming power supply Check circuit breaker, reset if required. Check power plug to be sure it is firmly in receptacle. Measure incoming power, call power co. if needed. Fuse, 10 Amp Check, replace if necessary. Fuse holder Check, replace if necessary. Switch, oven power Check for 120VAC supply to switch. If no voltage is present, trace wiring back to fuse holder. Check continuity between switch terminals. Replace switch as needed. Motor, main fan Check for 120VAC supply to the motor. If no voltage is present, trace wiring back to the switch. Check motor for opens, shorts or grounds. WITH POWER OFF: Turn fan blade to check for locked rotor. No control box cooling Incoming power supply Check circuit breaker, reset if required. Check power plug to be sure it is firmly in receptacle. Measure incoming power, call power co. if needed. Fuse, 10 Amp Check, replace if necessary. Fuse holder Check, replace if necessary. Switch, oven power Check for 120VAC supply to switch. If no voltage is present, trace wiring back to fuse holder. Check continuity between switch terminals. Replace switch as needed. Cooling fan Check for 120VAC supply to the cooling fan. If no voltage is present, trace wiring back to the oven power switch. If voltage is present and motor does not run, check for opens, shorts or grounds. WITH POWER OFF: Check for locked rotor. No automatic control box cooling Incoming power supply Check circuit breaker, reset if required. Check power plug to be sure it is firmly in receptacle. Measure incoming power. Call power co. if needed. Cooling fan thermostat Check cooling fan thermostat (thermostat closes at 120°F and opens at 100°F). With cooling fan thermostat pre-heated, check for continuity. If thermostat is open, replace cooling fan thermostat. Control box cooling fan continues to run Cooling ...
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