Thermador SMW272 B User Manual

Page 75
SMW Oven Service ManualLower Oven Section
SEQUENCE OF OPERATION
Press the BAKE 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 Bake and Broil Elements.
• Bake Relay K1 and Broil Relay K2 alternately open and close, and connect the L2 (120-volt) line
to the Bake and Broil elements. NOTE: The Bake Element is on for 51-seconds, and draws 11-
amperes during each 1-minute cycle. The Broil Element is on for 8-seconds and draws 15-amperes
during each 1-minute cycle.
L2
L1
Cooling
Fan
K6
Cooling Fan
Relay
N.O.
Stalled
Fan Relay
Air
Switch
High-Temp
Cutout
N.O.
Stalled Fan
Relay Contacts
N.O.
K8
L1 Relay
N.C.
N.O.
Bake
K1
Bake
Relay
N.O.
K2
Broil
Relay
N.O.
51 Seconds
11 Amps
Broil
8 Seconds
15 Amps
N.O. = Normally Open Contacts
N.C. = Normally Closed Contacts
= Neutral Return
Lower Oven
Bake Cycle — Bake Preheat & Bake Mode

Thermador SMW272 B Specifications

General

Brand	Thermador
Model	SMW272 B
Category	Oven
Language	English