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SECTION 5 TROUBLE-SHOOTING
TO FRONT
50
FRAME GRD
STUD
A
B
BUZZER
B1
(UPPER)
5
7
50
PILOT-LIGHT
LT1
GRN
A
B
2
1
105
1
2
3
7
8
4
5
6
9
10
TB1
4
6
106
TIMER
24
DONE
RUN
22
55
ON
21
12
9
11
A
B
53
TIMER
60 MIN. TIMER
TMR1 (UPPER)
TO FRONT
FRAME GRD
NOTES:
STUD
1. ALL WIRES 18 AWG AND YELLOW EXCEPT WHERE INDICATED OTHERWISE.
2. FOR WIRE LEAD SCHEDULE REFER TO DRAWING C 91-6472.
Figure 5-1 Wiring Diagram Mechanical Controls, Model ST-12
CONNECTOR
55
56
11
11
12
12
11
BLK
29
BLK
1
1
3
34
2
2
8
51
9
9
10
30
3
3
4
4
185
49
5
5
184
6
6
32
7
7
10
10
TO 120/240V
SUPPLY BOX
8
8
P1
J1
5-3
56
14
13
51
9
5
WHT
59
REED SWITCH
WHT
S1
BLK
27
28
A
B
47
102
RELAY R1
WHT
COLD WATER
101
CONDENSER
31
A
B
14
13
5
9
33
BLK
59
36
A
THERMOSTAT
SWITCH S3
WHT
A
B
STEAM SOL.
VALVE V3
WHT
BLK
48
EXISTING
WIRES
11
3
TO 120/240V
SUPPLY BOX
L1
L1
N (L2)
(OPTIONAL)
BOILER CONTROL BOX
(AUTOMATIC BOILERS)
60
60
V1
B
47
186
N
TO 120/240V
SUPPLY BOX
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