Weil-McLain Eco Tec 2 Series Advanced Manual page 24

®
ECO Tec series 2 gas-fired water boiler – advanced manual
EXPRESS Setup — Typical Application B
5
Service
switch T1
Hot
1 1
Neutral
120VAC
2 2
Power
Ground
3 3
4
BK, W, G T2
4 4
Zone Circulator 5 5
8
2.2A Max.
6 6
7 7
8 8
4
BK, W, G
9 9
Zone Circulator
9
2.2A Max.
4
BK, W, G
Zone Circulator
10
T3
2.2A Max.
10 10
11 11
4
12 12
13 13
Zone Circulator
11
14 14
2.2A Max.
15 15
BK, W, G
Boiler circulator
Output 2.2A Max.
120 VAC Power for
boiler circulator
1
5
Service
switch T1
Hot
1 1
Neutral
120VAC
2 2
Power
Ground
3 3
2
BK, W, G T2
4 4
DHW Circulator
1
5 5
2.2A Max.
6 6
7 7
8 8
2
BK, W, G
9 9
DHW Circulator 2
2.2A Max.
2
BK, W, G
DHW Circulator
3 T3
2.2A Max.
10 10
11 11
12 12
13 13
14 14
15 15
BK, W, G
Boiler circulator
Output 2.2A Max.
120 VAC Power for
boiler circulator
1
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See Legend on page 18 for Item number identification.
Shadow 3 Boiler – Field Wiring
BK
W
J3 J3
G
BK
W
G
BK
Control
W
G
J4
W
G
J3 J3
BK
W
G
BK
12
G
ECO Tec-631-B p2
Shadow 4 Boiler – Field Wiring
BK
W
J3 J3
G
BK
W
G
BK
Control
W
G
J4
W
G
J3 J3
BK
W
G
BK
12
G
From Shadow 2 Boiler
B- Gnd
A+
6
J12
8
J21
*
* For redundancy only (not needed)
From Shadow 3 Boiler
B- Gnd
A+
6
J12
8
J21
*
* For redundancy only (not needed)
(cont.)
8 8
7 7
6 6
J16 J16
5 5
4 4
N/C
3 3 C
R
2 2
7
Zone 11
W 70
1 1
70 70
9 9 C
R
8 8
7
Zone 10
70
W
7 7
70 70
6 6 C
5 5
7
R
70 Zone 9
4 4
70 70
W
J17 J17 C
3 3
2 2
7
R Zone 8
70
1 1
70 70
W
9
J19 J19
*
System return
temp. sensor
1 1
Common
2 2
*
System supply
3 3
temp. sensor Common
4 4
5 5
Outdoor air temp.
sensor (if used) 6 6
Common
11
8 8
7 7
6 6
J16 J16
5 5
4 4
N/C
3 3 C
R
2 2
Zone 12
70
W
1 1
70 70
9 9 C
R
8 8
W
7 7
DHW 3
6 6 C
5 5
R
4 4
W
DHW 2
3 3
C
J17 J17
2 2
R
1 1
W
DHW 1
9
J19 J19
*
System return
temp. sensor
Common
*
System supply
Common
temp. sensor
Outdoor air temp.
sensor (if used)
Common
11
Part number 550-100-272/1021
7
10
10
10
1 1
2 2
3 3
4 4
5 5
6 6