©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specifications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone (336) 629-4651
MNL-ASTPS14000 12
Big Dipper
®
AST System
Wiring Diagram
NOTE:
220-240V Units (International Units) have the
following wire color changes:
On the POWER SUPPLY CORD:
The Black Wire becomes Brown
The White Wire becomes Blue
The Green Wire becomes Yellow/Green
Wiring Diagram For
Big Dipper
®
Model W-250-AST
1
2
3
4
5
TIMER
MOTOR
HEATER
THERMOSTAT
GREEN
WHITE
BLACK
WHITE
WHITE
BLACK
BLACK
WHITE
WHITE
WHITE
POWER SUPPLY CORD
BLACK
BLACK
FULLY INSULATED
QUICK CONNECT
PIGGY-BACK
CONNECTOR
FULLY INSULATED
FEMALE CONNECTOR
BLACK
RED
RED
INTERCHANGE FULLY INSULATED
QUICK CONNECTORS TO CHANGE
HEATER OPERATING MODE. RED
WIRE TO THERMOSTAT GIVES
SIMULTANEOUS HEATER/MOTOR
OPERATION. BLACK WIRE TO
THERMOSTAT GIVES CONTINUOUS
HEATER OPERATION.
NEON
LAMP
GREEN
GREEN
RING TERMINALS TO GROUND STUD
ON MOTOR MOUNT BRACKET
GROUND WIRE ATTACHED
TO HEATER
PLUG/PIN
CAP/SOCKT
SWITCH CONNECTOR
BLACK
BLACK
MOTOR
TEST
SWITCH
+
-
C
NO
RECYCLE
NC
SOLENOID
COIL
INTERLOCK
SWITCH
1
2
BLACK
A
4
B
3
C
D
4
3
2
1
A
B
2
ZONE
REV
DESCRIPTION
C
REVISIONS
1
DATE
D
APPROVED
MATERIAL (UNLESS NOTED)
FINISH (UNLESS NOTED)
646 GREENSBORO STREET
PO BOX 2548, ASHEBORO, NC 27203
VOICE 336-629-4651 FAX 336-626-5739
Decimals
.XX +/- .03
.XXX +/- .015
Unless otherwise specified
Dimensions are in inches
Tolerances
Angular
• •••• •••••••
CHECKED
SIZE
REV. NO.
DWG NO.
PART NO.
C
SCALE NTS
RELEASE DATE 05/10/05
SHEET 1 OF 1
ENGINEERING
DRAWN
DATE
THIRD ANGLE PROJECTION
B. KYLES 05/10/05
B. KYLES 05/10/05
5
WD-250-AST
WIRING DIAGRAM FOR W-250-AST
AND W-750-AST BIG DIPPER
D-2
1
ADDED NEON LAMP
10/17/06
BWK
ALL
2
12/13/07
BWK
ALL
3
03/01/11
BWK
D-2
4
03/17/11
BWK
ALL
5
06/02/11
BWK
