Thermador SMW272 B User Manual

Page 77
SMW Oven Service ManualLower Oven Section
Press the CONVECTION keypad and select an oven temperature and the following events will occur on
the relay board:
• Line Relay K8 closes.
• Cooling Fan Relay K6 closes and turns the Cooling Fan on.
• Cooling Fan air flow closes the Air Switch and activates the Stalled Fan Relay.
• The Stalled Fan Relay contacts close and supply L1 to one side of Relay K8 (already activated).
• The L1 Relay connects L1 line voltage to the Convection Element.
• Convection Relay K3 closes and connects the L2 (120-volt) line to the Convection element. NOTE:
The Convection Element is on for 60-seconds, and draws 11-amperes during each 1-minute cycle.
• Convection Motor Relay K4 closes and activates the Convection Motor.
Convection Cycle – Convection Preheat & Convection Mode
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
60 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.

Thermador SMW272 B Specifications

General

Brand	Thermador
Model	SMW272 B
Category	Oven
Language	English