WMRSwitchingRelays
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General wiring | Add circulator to L8124A or C |
| aquastat/relay |
24 vac to | Thermostat or |
thermostat | isolated contact |
| to activate relay |
24 vac to | Thermostat or |
thermostat | isolated contact |
| to activate relay |
Electrical shock hazard — Disconnect power before installing or servicing. Can cause severe personal injury, death or substantial property damage if ignored.
All wiring must be installed in accordance with:
| T | T |
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| C |
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| R | W |
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24 VAC | Remove factory- | |
installed jumper from | ||
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| L1 to 3 to use | |
| as isolated contacts. |
24 VAC
C T T R W
U.S.A. — National Electrical Code and any other national, state or local code requirements. Wiring must be N.E.C. Class 1.
Canada — C.S.A. C22.1 Canadian Electrical Code Part 1 and any other national, provincial or local code requirements. Wiring must be C.S.A. C22.1 C.E.C. Part 1.
120 VAC |
L2 | L1 | 3 | 4 | 5 | 6 |
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Ground |
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screw |
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Ground |
| Normallyopen | contactout | Normallyopen | contactout |
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Hot |
| 85905 | ||||
Neutral |
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120 VAC |
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| Thermostat or |
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| Common | openNormally |
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| isolated contact |
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| to activate relay |
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T | T |
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| C | 5 | 6 |
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| R | W |
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| NO |
| NC |
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24 VAC
120 VAC |
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| Remove factory- |
| L2 L1 3 | 4 | 4 | installed jumper from |
| L1 to 3 to use 3/4/4 | |||
Ground |
| NO NC | as isolated contacts. | |
screw | Common | |||
Ground | openNormally | closedNormally |
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Neutral |
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120 VAC |
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Hot |
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| 85906 |
120 VAC
L2 | L1 | 3 | 4 | 5 | 6 |
Ground |
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screw |
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Ground |
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Neutral |
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120 VAC |
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Hot |
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| Circulator 2 |
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| T |
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| ZR |
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| ZC |
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| B1 |
| L8124A or C | |
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To burner control | B2 | Aquastat/relay |
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| C1 |
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Circulator 1 | C2 |
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Neutral | 1 |
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120 VAC |
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Hot | 2 |
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| 85907 |
Legend |
| 120 VAC field wiring |
24 VAC field wiring |
| 120 VAC ground lead |
24 VAC factory wiring | 120 VAC factory wiring | |
4 | Part Number |
