Wiring Diagrams - Thermo Scientific 274F Manual

Laboratory freezers
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W
D
IRING
IAGRAMS
L1
BLK
KEY
SWITCH
RED
24
GRN/YEL
DOOR SWITCH #1
BLU
BLU
YEL
DOOR SWITCH #2
(2-DOOR MODEL ONLY)
YEL
BLK
DOOR SWITCH #3
(3-DOOR MODEL ONLY)
BLK
ORN
RED
12 V DC
CONTROLLER
AC
TAB 3
RED
230 VAC
WHT
BLK
EVAPORATOR
FAN CONTROL
BLK
ORN
ORN
DEFROST TIMER
DEFROST
CUT-OUT COIL
SWITCH 1
R1
BRN
PNK
Cool
Relay
Compressor
+
-
Relay
-
+
R1
FREEZER LIGHT
WHT
BLU
PRPL
DEFROST
EVAPORATOR
SWITCH 2
FAN(S)
FACE HEATER(S)
CONDENSATE DRAIN
HEATER
DEFROST HEATER
WHT
RED
DEFROST LIMIT
CONTROL
RED
COMPRESSOR MOTOR
CONDENSER FAN(S)
DEFROST TIMER
MOTOR
N
WHT
WHT

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