Page 79
SMW Oven Service ManualLower Oven Section
NOTE: The Convection Roast cycle is a continuation of the Convection Roast Preheat cycle.
Press the CONVECTION ROAST keypad and the following events will occur on the relay board:
• The L1 Relay connects L1 line voltage to the Convection and Bake Elements.
• Bake Relay K1 and Convection Relay K3 alternately open and close and connect the L2 (120-volt)
line to the Bake and Convection elements. NOTE: The Convection Element is on for 29-seconds,
and draws 11-amperes during each 1-minute cycle. The Bake Element is on for 30-seconds, and
draws 11-amperes during each 1-minute cycle.
• Convection Motor Relay K4 closes and activates the Convection Motor.
• After the Convection Roast Preheat temperature has been reached, Relays K2 and K3 cycle off
(open). When the thermostat cycles back on, the circuit switches from Relays K2 and K3, to Relays
K1 and K3, for the rest of the selected temperature and cooking time. Relays K1 and K3 will cycle
on and off to maintain the selected temperature.
Convection Roast Cycle
L2
L1
Cooling
Fan
K6
Cooling Fan
Relay
N.O.
Stalled
Fan Relay
Air
Switch
N.O.
Bake
K1
Bake
Relay
N.O.
Conv.
N.O.
K2
Broil
Relay
K3
Conv.
Relay
N.O.
K4
Conv.
Motor
Relay
Conv.
Motor
N.O.
Broil
30 Seconds
11 Amps
29 Seconds
11 Amps
N.O. = Normally Open Contacts
N.C. = Normally Closed Contacts
= Neutral Return
K8
L1 Relay
N.C.
N.O.
High-Temp
Cutout
Stalled Fan
Relay Contacts
N.O.
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