WIRING DIAGRAMS
1
MV | 6 | Y | G | W | O | B | RC | RH |
A
MV | RH |
MV W RH RC G Y O B 6
1 | From millivolt system | NOTE: Thermostat must have batteries installed. | ||||||
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| Figure 4. Typical wiring diagram for millivolt system | ||||||
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| Millivolt System |
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| Changeover Relay Energized in |
| Hot Side |
A |
| G | ||||||
| L | |||||||
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| Heating (Single Stage Heat |
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B | Zone Valve |
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| M | Neutral Side | |
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| Pump System) | ||||
| Cooling System |
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| HEATING TRANSFORMER | |
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C |
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| H | Jumper Wire | ||||||
| Fan Relay |
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| COOLING TRANSFORMER | ||||
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D |
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| TRANSFORMER | O | |||
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| Heating System |
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| Jumper Wire | |
E |
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| P | |||
| J | 24 VAC Side | ||||||
| Changeover Relay Energized in |
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F | K | 120 VAC Side |
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Cooling (Single Stage Heat
Pump System)
10
