!CAUTION
Take care when securing and routing wires so they do not short to adjacent terminals or rear of thermostat. Personal injury and/or property dam- age may occur.
NOTE
These typical wiring diagrams show only the terminal identification and wiring hookup. Always refer to wiring instructions, provided by equipment manufacturer, for system hookup operation.
Fan
Switch
AUTO | ON | |
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G
Moveable
Yellow Jumper
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| Adjustable Heating | |
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| Anticipator | |
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| COOL | OFF | HEAT |
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| System | |
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| Switch | |
RC | O |
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| RH |
| Fixed Cooling |
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| Anticipator |
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| THERMOSTAT |
| Captive |
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| Screws |
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System |
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Switch |
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| COOL |
| SUBBASE |
| OFF |
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| HEAT |
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Y | W | A* | B |
SYSTEM
*Terminal "A" is not for field wiring. See
SPECIAL SYSTEM CONFIGURATIONS section for proper use of terminal "A".
Figure 3. Typical wiring diagram (see figs. 4, 5, and 6 for typical system/thermostat wiring)
KEEP THIS | G | RC |
AREA CLEAR | ||
OF WIRES! |
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| B | |
Red Jumper Wire | O |
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| W |
RH | A | |
Yellow Jumper Wire | ||
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| Y |
THERMOSTAT
WIRING
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| RH | W | B | |||
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| Hot |
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| Heat |
| * * |
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| Relay |
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120 VAC |
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| 24 VAC |
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| Neutral |
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| Terminal energized | ||||
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| * | ||||||
| TRANSFORMER | in cooling |
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O | Y | G RC | A |
* | Compressor | Fan | SYSTEM |
Relay | Relay |
Terminal energized
** in heating
Figure 4. Typical wiring for single transformer heating/cooling system
KEEP THIS
AREA CLEAR
OF WIRES!
Yellow Jumper Wire
NOTE: Remove factory- installed jumper between RC and RH terminals for this application.
G | RC |
| B |
O | THERMOSTAT |
| WIRING |
| W |
RH | A |
| Y |
| RH | W | B |
| A | O | Y | ||||
TRANSFORMER |
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| Heat |
| * * |
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| Compressor | |||
Hot |
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| Relay |
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| Relay | |||
120 VAC | 24 VAC |
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Neutral |
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| Terminal energized |
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| Terminal energized | |||||
| * |
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| in cooling |
| in heating |
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G RC
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| TRANSFORMER | |||||
Fan |
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| Hot | ||
Relay |
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| 24 VAC |
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| 120 VAC SYSTEM | |||
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| Neutral | |
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Figure 5. Typical wiring for two-transformer heating/cooling system
4
