•Installation •
Figure 24 Schematic wiring diagram
Red |
| White |
|
120 VAC hot/neutral
Low voltage (colors vary)
Ground connectors
W
B
R
| R |
| Red |
White | hose |
| |
hose |
|
| 120 VAC |
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|
| Service |
| Neutral | Ground |
|
| switch | |
| Hot |
|
| (not provided) | ||
wiring | Service |
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| Thermostat |
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| or end switch |
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| ||
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| |
|
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|
| (not provided) |
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Field | switch |
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provided) |
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| |
| (not |
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| Thermostat |
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| Ground screw | Wire nuts | or end switch | |
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|
| (not provided) | |||
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| |||
wiring | Black | White | Green | Black | Black |
|
Factory | Junction box, |
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| Thermost at |
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| leads, through |
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| jacket left side |
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| boiler left side |
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|
W | W |
G | G |
B | B |
BR
R
Air pressure | Transformer | System circulator | Bypass circulator |
switch |
|
|
|
W
G
B
POWER | TSTATCIRC | LIMIT | PRESSWIT CH | FLAME |
W | W | W | W |
| G | G | G |
B | B | B | B |
GCM
W B
R | BL | R |
|
| BL |
Y |
| Y |
|
| |
B | G | B |
|
| B |
BR | R | B |
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|
Block |
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|
temperature |
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| |
limit switch |
| W G B |
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| Y |
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Y |
| Blower | BL | BL |
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| |
|
| motor |
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| Gas |
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| valve |
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| Y |
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| Water |
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|
| temperature |
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|
85029 | Y | limit switch |
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Part number
Water 
temperature sensor
Hot surface
W
igniter
B
53
