WIRING CONNECTIONS
Typical wiring diagrams are provided below for the following systems: Single Stage Heat/Cool systems
Heat Pump system, one compressor or one speed compressor with Aux. Heat Heat Pump systems, two compressors or two speed compressor with Aux. Heat
Refer to the equipment manufacturers instructions for specific wiring information. After completing the connections configure the thermostat in the Installer Configuration Menu to match your system type.
Figure 4 – Single Stage (No Heat Pump) Terminal Outputs
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| Blower/ |
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| 24 Volt |
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| Circulator | Energized | Energized | Fault | |||||
| 24 Volt | Cool Mode |
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| Heat | Fan Energized | in Cool | in Heat, Off | Indicator | |||||||||
Single Stage | (Common) |
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| No Output | on Call for | Mode | Mode | for Heat | ||||||||||||
(SS1) | (Hot) | Optional | 1st Stage | No Output | Mode | Cool or Fan, | (Change- | (Change- | Pump | |||||||||||
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| Connection | (Compressor) |
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| 1st Stage | Energized on | over Valve | over Valve | Systems | |||||||
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| (Heater) | Call for Heat if | or Damper) | or Damper) | with | |||||
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| Elect/Gas |
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| Switch Set to |
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| Switch | ||
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NEUTRAL |
24VAC |
HOT |
120VAC
CLASS II
TRANSFORMER
* The RC/PS switch shown in Figure 1 configures the thermostat for Hardwire or Power Stealing.
The factory setting is RC (Hardwire) and requires a Common connection from the system transformer to the "C" terminal on the thermostat. If no common wire is available for the thermostat "C" terminal, move the RC/PS switch to PS (Power Steal- ing). NOTE: If set to PS (Power Stealing), the thermostat "C" terminal must not have a wire connected.
Figure 5 – Multi-Stage (No Heat Pump) Terminal Outputs
| R | *C | Y1 | Y2 | W2 | E/W1 | G | O | B | L | ||||||||||
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| Blower/ |
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| 24 Volt |
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| Circulator | Energized | Energized | Fault | |||||
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| Fan Energized | in Cool | in Heat, Off | Indicator | ||||||
| 24 Volt (Common) | Cool Mode | Cool Mode | Heat | Heat | on Call for | Mode | Mode | for Heat | |||||||||||
(MS2) | (Hot) | Optional | 1st Stage | 2nd Stage | Mode | Mode | Cool or Fan, | (Change- | (Change- | Pump | ||||||||||
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| Connection (Compressor 1) (Compressor 2) 2nd Stage | 1st Stage | Energized on | over Valve | over Valve | Systems | ||||||||||||
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| Call for Heat if | or Damper) | or Damper) | with | ||||
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| Elect/Gas |
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| Malfunction | ||
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| Switch Set to |
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| Switch | ||
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NEUTRAL |
24VAC |
HOT |
120VAC
CLASS II
TRANSFORMER
* The RC/PS switch shown in Figure 1 configures the thermostat for Hardwire or Power Stealing.
The factory setting is RC (Hardwire) and requires a Common connection from the system transformer to the "C" terminal on the thermostat. If no common wire is available for the thermostat "C" terminal, move the RC/PS switch to PS (Power Steal- ing). NOTE: If set to PS (Power Stealing), the thermostat "C" terminal must not have a wire connected.
Figure 6 – Heat Pump Terminal Outputs
| R | *C | Y1 | Y2 | W2 | E/W1 | G | O | B | L | ||||||||||
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Heat Pump 1 |
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| Heat |
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(HP1) |
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| Mode |
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| Circulator |
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| No Output | 2nd Stage. |
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| Fan Energized | Energized | Energized | Fault | |||||||
Single |
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| 24 Volt |
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| Emergency |
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| on Call for | in Cool | in Heat, Off, | Indicator | ||||||||
Compressor | 24 Volt (Common) | Heat Mode- |
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| Mode 2nd |
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| Heat/Cool | Mode | Emergency | for Heat | |||||||||||||
Heat Pump | (Hot) | Optional | 1st Stage |
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| Stage | Emergency | |||||||||||||
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| or Fan, | (Change- | Mode | Pump | |||||||||||||||
Heat Pump 2 |
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| Connection | Cool Mode- | Heat Mode- | Heat | Mode |
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| 1st Stage |
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| over Valve) | (Change- | Systems | |||||||||||||
(HP2) |
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| 1st Stage | 2nd Stage | Mode |
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| over Valve) | with | ||||||
Two |
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| (Compressor 1) | Cool Mode- | 3rd Stage. |
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| Elect/Gas |
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Compressor |
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| Emergency |
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or Two Speed |
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| 2nd Stage | Mode 2nd |
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| Emergency |
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Compressor |
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| (Compressor 2) Stage |
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| Mode Heat Type |
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NEUTRAL |
24VAC |
HOT |
120VAC
CLASS II
TRANSFORMER
* The RC/PS switch shown in Figure 1 configures the thermostat for Hardwire or Power Stealing.
The factory setting is RC (Hardwire) and requires a Common connection from the system transformer to the "C" terminal on the thermostat. If no common wire is available for the thermostat "C" terminal, move the RC/PS switch to PS (Power Steal- ing). NOTE: If set to PS (Power Stealing), the thermostat "C" terminal must not have a wire connected.
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