TurboChef Technologies Residential Single and Double Wall Oven - Manual (Page 60)

5.12 OVEN SYSTEMS
Solid State Relay - K1 L1 Speedcook
Heating Elements
Th e K1 solid state relay is a 240 VAC, dual 40 amp
relay. Th is relay supplies L1 voltage to the Speedcook
oven’s heating elements. Th e control board sends
24 VDC to the K1 solid state relay to “open” and
“close” both sides of the solid state relay, which helps
ensure absolute temperature control.
Solid State Relay - K11 Bake and Convection
Elements (Double Wall Oven Only)
Th e K11 solid state relay is a 240 VAC, dual 40 amp
relay. Th is 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)
Th e K12 solid state relay is a 240 VAC, dual 40
amp relay. Th is relay controls the L1 voltage to the
lower oven’s inner and outer broil elements. Th e
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
Th e 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)
Th e temperature switch uses a six-wire (RJ) cable to
communicate the temperature selection to the
control board.
Transformer, Clock, 12 VAC
Th e 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, Cook Cavity
To prevent temperature from running away during
normal oven operation, each oven is monitored by
a thermostat (270°F switch for Speedcook cavity
and 280°F for the lower oven cavity in double wall
ovens). In both the single and double wall oven, the
switch(es) are wired to the control board through
P7-18 and P8-6 (Gen 1) or pins J15-18 and J15-19
(Gen 2).
Thermostat, Cooling Fan Control
Th e 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). Th
ey
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
Th e 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)
Th e 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: Th e 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