SEQUENCE OF OPERATION
IMPINGER X2 OVENS
120/230VAC | 60 HZ. | 1 PHASE | |
120/230VAC | 60 HZ. | 3 PHASE | |
120/230VAC | 60 HZ. | 1 PHASE | |
120/230VAC | 60 HZ. | 3 PHASE | |
120/230VAC | 60 HZ. | 1 PHASE | |
120/230VAC | 60 HZ. | 3 PHASE |
| *NOTE: |
| Model number ending in TS indicates top belt is split belt |
| Model number ending in SB indicates bottom belt is split belt |
| Model number ending in SS indicates both belts are split belts |
POWER SUPPLY | Electrical power to be supplied to the oven by a four conductor service for single phase |
| or a five conductor service for three phase. |
| Black conductor is hot. |
| Red conductor is hot. |
| Orange conductor is hot. |
| White conductor is neutral. |
| Green conductor is ground. |
MAIN FAN CIRCUIT | Power is permanently supplied to the normally open contacts of the main fan relay. |
| Power is also supplied, through a 2 amp. fuse, to the 30 minute time delay relay. |
| Closing the oven fan switch enables the 30 minute time delay relay. The 30 minute time |
| delay relay supplies 120VAC to the coil of the main fan relay. These normally open |
| contacts now close energizing the main fan motor. Closing the main fan switch also |
| supplies 120VAC to the burner and conveyor switches. |
BURNER CIRCUIT | Closing the main fan switch supplies 120VAC to the normally open burner switch. |
| Closing the burner switch supplies 120VAC to the electronic temperature control, |
| through the air pressure switch and the oven cavity |
| open contact of the burner blower relay and to the primary of the burner transformer. |
| The transformer’s secondary supplies 24VAC To the normally open contacts of the |
| burner blower motor centrifugal switch and to the coil of the burner blower relay (the |
| normally open contacts close within 30 seconds). The burner blower relay contacts |
| close, supplying 120VAC to the burner blower motor. As the burner blower motor |
| reaches operating speed, it’s internal centrifugal switch closes, supplying 24VAC to the |
| burner control. When the burner control is supplied with 24VAC, the pilot valve is |
| energized and the igniter circuit is energized. Ignition should now occur. After the pilot |
| flame is proven, the main gas valve is energized. |
TEMPERATURE CONTROL | Closing the main fan switch and burner switch supplies 120VAC to the electronic |
| temperature control. The electronic temperature control is adjusted to the desired |
| temperature. The thermocouple will provide varying millivolts to the electronic |
| temperature control. The temperature control supplies 120VAC to the temperature |
| regulation valve at intermittent intervals to maintain desired temperature. |
CONVEYOR DRIVE | THE OVEN WILL CONTAIN BETWEEN TWO AND FOUR SEPARATE CONVEYOR |
| DRIVE SYSTEMS. THE SEQUENCE OF OPERATIONS WILL BE THE SAME FOR |
| EACH MOTOR SYSTEM. |
| Closing the main fan switch and the normally open conveyor switch supplies 120VAC, |
| through a 2 Amp. fuse, to the conveyor control. AC voltage is converted to DC voltage |
| and DC voltage is supplied, at terminals A+ and |
| conveyor control will vary the DC output voltage. The speed of the motor will increase or |
| decrease as the DC voltage from the conveyor control increases or decreases. |
NOTE: | The conveyor control uses a hall effect sensor and magnet, mounted on the conveyor |
| motor that senses motor speed. Any change in motor load (± RPM) is detected by the |
| sensor and the voltage to the motor is adjusted accordingly. |
AUTOMATIC COOL DOWN | When the oven is started, the 30 minute time delay relay is enabled, permitting the oven |
| fan to operate for approximately 30 minutes after the oven is shut off, to cool the oven. |
| When the oven is shut off, the 30 minute time delay relay will keep the coil of the main |
| fan relay closed for 30 minutes, maintaining operation of the main fan motor. |
2 | Impinger X2 – Analog Service Manual – Dom & Int’l |
