INSTALLATION
Installation
Fig. 1 - Typical Connection of a Single Stage or Multi-Stage System
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SYSTEM | R | RH | RC | C |
| W/E | W2 | Y | Y2 | G | O/B | L |
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Single | 24 VAC | 24 VAC | 24 VAC |
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| Heat | N/A | Cool | N/A | Fan | N/A | System |
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Stage | Power | Power for | Power |
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| Monitor |
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| Heating | for Cooling | 24 VAC |
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Multi | 24 VAC | 24 VAC | 24 VAC | Common |
| Heat | Heat | Cool | Cool |
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Stage | Power | Power | Power | Required |
| mode | mode | mode | mode |
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| 1st | 2nd | 1st | 2nd |
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| stage | stage | stage | stage |
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| NEUTRAL |
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| 24 VAC |
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| 120 VAC | |
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*Factory installed jumper between RH and RC |
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| HOT |
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| CLASS II | ||||||||||||||||||
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Transformer
Fig. 2 - Typical Connection of Heat Pump System up to 4 Stages Heat/2 Stages Cool
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SYSTEM | R | RH | RC | C |
| W/E | W2 | Y | Y2 |
| G | O/B | L |
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Heat | 24 VAC | 24 VAC | 24 VAC |
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| Aux / | Aux / | 1st | 2nd | Fan | Change- | System |
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Pump | Power | Power for | Power | 24 VAC |
| Em | Em | Stage | Stage |
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| over | Monitor |
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| Heating | for Cooling |
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| Common |
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| Required |
| Stage | Stage | pres- | pres- |
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| sor | sor |
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| NEUTRAL |
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| 24 VAC |
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CLASS II
*Factory installed jumper between RH and RCTransformer Note: Dual fuel systems W/E is fossil fuel 1st stage and W2 is fossil fuel 2nd stage.
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