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18
Wiring Diagram:
Immersion Thermostat Models
with Staging
3 Stage
-GS Models
480
277
240
C
120
120
CONTROL
TRANSFORMER
208
33 35
32 34
20 22
810
712
9 11
21 23
31 36
19 24
ELEMENTS
GRD
THERMOSTATS
LIMIT
BL
W
1
2
3
30
27
18
15
6
3
29
26
17
14
5
2
28
25
16
13
4
1
THREE PHASE CONNECTIONS
1 2 3
SINGLE PHASE CONNECTIONS
ALL BLACK ALL RED
FIELD
WIRING
BLOCK
R
BLK
B
A
3 AMP
CLASS G FUSES
D
CONNECTED TO
HIGH LIMIT
FUSE BLOCKS
35 AMP
CLASS G
FUSES
R
R
R
R
R
R
R
R
R
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
31
32 33
19
20 21
7
89
10
11 12
22
23 24
34
35 36
CONTACTORS
R
R
R
R
R
R
R
R
R
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
RRRRRR
BL
BL
W
W
W
WW
25 26 27 13 14
15
123 45616 17
18
28
29 30
N I
M
H
V
BL
Y
37 38 39
43 44 4537 38 39
49 50 51
49 50 51
43 44 45 40 41 42
40 41 42
46 47 48
46 47 48
52 53 54
52 53 54
Y
NOTE:
THIS WATER HEATER MAY BE SUPPLIED BY A BRANCH CIRCUIT HAVING OVER 300 VOLTS BETWEEN
CONDUCTORS, PROVIDED THE SYSTEM HAS A GROUND NEUTRAL AND NO CONDUCTOR IS OVER
300 VOLTS TO GROUND.
!
THERMOSTAT AND HIGH LIMIT CONTROLS
OPERATE AT INCOMING LINE VOLTAGE.
!
!
!
!
R
D
C
BLK
W
J
BL
G
BL
X
BL
R
F
U
R
E
CONNECTED TO
RATED VOLTAGE ON
TRANSFORMER
R
S
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