Turbo Chef Technologies Residential Single and Double Wall Oven RJ Cables, SD Card, Oven Systems

24 VDC to the activating terminals of the relay. The N.O. switch closes to send L1 voltage to the preheat element. When the RTD registers that the oven has reached 80% of the preset temperature, the control board stops sending 24 VDC to the K8 relay and the switch opens to turn off the preheat element.

Relay - K9 L2 Speedcook Heating Elements

The K9 relay is a 120 VAC single-pole, double- throw, relay. This relay supplies L2 voltage to the three Speedcook oven heating elements. On Gen 1 ovens, this relay also supplies L2 voltage to the upper and lower cooling fans inline with the 5-amp fuse.

Relay - K10 Lower Door Lock (Gen 1 Oven)

The K10 relay works in conjunction with the lower oven’s plunger light switch to activate the lower oven lock motor. Terminal 2 on the selector switch constantly supplies 120 VAC to the K10 relay’s common. The control board activates the K10 relay’s N.O. switch to the lower oven lock motor by using a circuit inline with the plunger light switch.

This means that the K10 relay will only activate the lower oven lock motor when the oven door is closed (plunger pressed).

Relay - K13 L2 Lower Heating Elements (Double Wall Oven Only)

The K13 relay is a 120 VAC single-pole, double- throw, relay. This relay supplies L2 voltage to the four lower oven heating elements.

RJ Cables

The RJ cables connect the control board to the CookWheel and lower oven Mode and Temperature switches.

RTD

The RTD uses resistance to register cook cavity temperature. As heat increases in the oven, so does the resistance registered in the RTD. This allows the control board to accurately monitor the temperature in the oven and activate/deactivate the elements as needed. Refer to the ohms/temperature chart for testing (page 6.5).

SD Card

The SD card, which is inserted into the control board, stores the control software for the oven.

CAUTION: When inserting an SD card, always ensure it is set to unlocked; otherwise the oven will not properly save settings. DO NOT remove the card when the oven is powered up.

Before replacing the SD card, back up Favorites to a USB drive (page 4.3)

After replacing the SD card,

1.Restore Favorites from the USB drive (page 4.3).

2.Set the Oven Configuration to single or double (page 4.4).

Selector Switches

When the CookWheel or the lower oven selector switch is turned to a setting other than off, the switch between terminals 1 and 2 is closed. This supplies L2 voltage to the lower cooling motor, the activating terminal on the K13 lower heating element relay, and the CookWheel to supply power to the upper cooling motor. In other words, whenever an oven is turned on, the electrical compartment cooling fans also turn on. In Gen 1 ovens, the fans will turn off when the oven is turned off. In Gen 2 ovens, the cooling fans will remain on for an additional two minutes after the oven has been turned off.

NOTE: The electrical cooling fans will also turn on at any time regardless of the selector switch position if the temperature within the upper electrical compartment exceeds 140°F (60°C), or if the temperature within the lower electrical compartment exceeds 160°F (71°C).

In double wall ovens, the K13 N.O. closes and sup- plies L2 voltage to the bake, convection, inner broil, and outer broil elements. When a convection cycle is selected, the convection fan is also powered and will remain on until the convection cycle is no longer selected.

5.11

OVEN SYSTEMS