FIGURE 27: One Zone Operation (with Outside Air Blower) without Control Panel
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| SPST (12 A) |
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| Transformer |
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| Relay |
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| R | C |
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| W G |
| Y |
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| Thermostat |
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| Black |
| 1 |
| 3 |
| 120 V |
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| 2 | ||
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| 4 | 6 | ||
| 1 Ø |
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| COIL | 5 COIL | |
| 60 Hz | Black |
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| L |
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Outside Air | N | White |
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Ground |
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Blower |
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N |
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L |
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| Pressure Switch |
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(Outside Air Blower) |
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| Red | |
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| L | N |
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| L | N |
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Pressure |
| Pump |
| Zone 1 |
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Switch |
| Burners |
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| Motor |
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(Pump) |
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| Nine Burners Maximum | |||
44 |
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