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ELECTRICAL WIRING DIAGRAM
TERMINAL
BLOCK
TSTAT
NC
HI LIMIT
TSTAT
NO
COOL DN
FAN
CONTACTOR
POWER
ON/OFF
(I/O)
SWITCH
HEATING
ELEMENTS
TRANSFORMER
230Vp : 24Vs
TIMER BOARD
AC
IN
R3 R2 R1 12V+
+
-
+
-
+
-
RELAY 1 RELAY 2 RELAY 3
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Wiring Diagram Notes:
Capacitor and resistor inside dashed box are used ONLY on European MBT240
Heating elements are numbered back-to-front
Relay 1 powers elements 1, 4, 7, and 10
Relay 2 controls elements 2, 5, 8, and 11
Relay 3 controls elements 3, 6, 9, and 12
SEE
NOTE
BELOW
0.5A
FUSE
1µF
470k OHMS