Turbo Chef Technologies Residential Single and Double Wall Oven Oven Systems, Heating Elements

5.12OVEN SYSTEMS

Solid State Relay - K1 L1 Speedcook	Thermostat, Cook Cavity
Heating Elements	To prevent temperature from running away during
The K1 solid state relay is a 240 VAC, dual 40 amp	normal oven operation, each oven is monitored by
relay. This relay supplies L1 voltage to the Speedcook	a thermostat (270°F switch for Speedcook cavity
oven’s heating elements. The control board sends	and 280°F for the lower oven cavity in double wall
24 VDC to the K1 solid state relay to “open” and	ovens). In both the single and double wall oven, the
“close” both sides of the solid state relay, which helps	switch(es) are wired to the control board through
ensure absolute temperature control.	P7-18 and P8-6 (Gen 1) or pins J15-18 and J15-19
	(Gen 2).

Solid State Relay - K11 Bake and Convection Elements (Double Wall Oven Only)

The K11 solid state relay is a 240 VAC, dual 40 amp relay. This relay supplies L1 voltage to the lower oven’s bake and convection elements (24 VDC control voltage).

Solid State Relay - K12 Broil Elements: Inner and Outer (Double Wall Oven Only)

The K12 solid state relay is a 240 VAC, dual 40 amp relay. This relay controls the L1 voltage to the lower oven’s inner and outer broil elements. The control board sends 24 VDC to the K12 SSR to independently “open” and “close” each side of the SSR, over 100 times per second, for absolute temperature control.

Speaker

The speaker provides audible feedback to the operator whenever a key is pressed or a task (such as a cook cycle) is completed, etc. See page 4.1 for adjustments.

Temperature Switch (Lower Oven)

The temperature switch uses a six-wire (RJ) cable to communicate the temperature selection to the control board.

Transformer, Clock, 12 VAC

The 12 VAC transformer supplies voltage to the Speedcook oven clock. For Gen 2 ovens, the 12 VAC transformer is located on the relay board (terminals RBJ18-1 and 2).

Thermostat, Cooling Fan Control

The cooling fan control thermostats are normally- open snap switches that will close 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). They supply voltage from the terminal block to the upper and lower cooling fans, allowing them to operate

if they are needed after the CookWheel or selector switch has been turned to the off position. If either thermostat closes, both cooling fans will be powered on.

USB Port

The USB port allows the oven operator to load software updates from a USB drive. For instructions, see page 4.3.

Connecting the USB Board (Gen 1 Oven)

The USB board connects to the control board via a 10-pin molex cable (for USB board location, see page A.7). Plug one end of the molex cable into the control board’s P25 connector, as shown in Figure

5.4.Ensure that, when facing the oven, the cable’s red stripe is on your right.

NOTE: The picture below shows the molex cable not completely inserted, ensure you completely insert the molex cable.

Red Stripe

Figure 5.4: Control Board, Connecting to USB Board