SEQUENCE OF OPERATIONS / 1600-000-A, 1601-000-A
| MODEL |
| MODEL |
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POWER SUPPLY | Electrical power to be supplied to the oven by a three conductor cordset. Voltage from |
| the black conductor to the white conductor to be 120 VAC. |
| White conductor is Neutral. |
| Green conductor is Ground. |
CONTROL BOX | When the temperature in either one of the Control Boxes reaches 120°F ± 3°F (49°C |
AUTO COOL DOWN | ± 1.7°C), the Cooling Fan Thermostats will switch power to the Cooling Fans. The |
| thermostats will interrupt power to the Cooling Fans when the temperature falls to |
| 100°F ± 3°F (37°C ± 1.7°C). |
MAIN FAN CIRCUIT | 120 VAC is permanently supplied to the normally open double pole power switch, a |
| normally open contact of the oven power relay and the normally open cooling fan |
| thermostats. Closing the power switch supplies 120 VAC, through the 3 A cooling fan |
| fuse, through both control box |
| These normally open contacts now close supplying 120 VAC, through the 10A main |
| fan fuse to the 2 main fan motors and the 2 burner motors. Power is also supplied to |
| the cooling fans, the heat and conveyor control systems. |
BURNER CIRCUIT | Closing the Oven Power Relay supplies 120 VAC to the (2) burner Systems |
| NOTE: This oven utilizes (2) complete Burner/Temp. Control systems. The sequence |
| of operations is the same for each system.120 VAC is supplied, through the |
| Centrifugal Switch of the Main Fan Motor (this switch closes when the Main Fan |
| reaches approximately 1600 R.P.M.) through the 10 Amp Fuse, to the Ignition |
| Control, the Electronic Temperature Control, and the burner transformer. As the |
| Burner Blower reaches approximately 1600 R.P.M., its internal centrifugal switch will |
| close, supplying 24 VAC to the ignition control. The Ignition Control operates on both |
| 24 VAC and 120 VAC. When the control is energized by 24 VAC, 120 VAC is |
| switched to the Hot Surface Igniter for 45 seconds for Hot Surface Igniter warm up. |
| The igniter glows red, 24 VAC is switched to the gas valve which opens, and ignition |
| should now occur. If ignition does not occur in 6 seconds, the control will lock out. To |
| recycle after lockout, turn off the burner switch for 45 seconds and then turn the |
| switch back on. |
TEMPERATURE | When the Centrifugal Switch of the Main Fan Motor closes, power is applied to the |
CONTROL | Temperature Control. The1K ohm Temperature Pot is adjusted to desired |
| temperature. Thermocouple will provide varying millivolts to the Temperature |
| Controller. The Temperature Controller supplies 120 VAC to the solenoid valve at |
| intermittent intervals to maintain desired temperature. The heat lamp is energized |
| with the solenoid valve. |
CONVEYOR DRIVE | Closing the on/off switch supplies 120 VAC through the oven power relay to the motor |
| control board. AC volts are converted to DC volts and are supplied to the conveyor |
| motor at terminals A+ and |
| change resistance at terminals P1 and P2 varying the DC voltage to the motor. The |
| speed of the conveyor motor will increase or decrease as the DC voltage from the |
| board increases or decreases respectively. |
NOTE: | The conveyor control uses a sensor and magnet, mounted on the conveyor motor that |
| senses the motor speed. Any change in motor load, (±RPM) is detected by the |
| sensor and the voltage to the motor is adjusted accordingly. |
TEMPERATURE | Closing the switch supplies 120 VAC to the primary of the temperature display |
DISPLAY | transformer. The secondary of this transformer supplies 12 VAC to the temperature |
| display. The thermocouple supplies D.C. millivolts to the temperature display. The |
| display converts this millivolt reading to a temperature reading. |
Low Profile – | 3 |