Conventional Heat/Cool wiring and HVAC setup codeUpdated a year ago
The thermostat will support up to 2-stages of cooling (Y1, Y2), 2-stages of heating (W1, W2) and fan control (G).
The thermostat is powered on terminals RH and C. W1-O/B and W2-AUX are multi-purpose terminals and requires an HVAC setup code before it can be used to control the HVAC equipment.
Basic Conventional Setup Codes:
| Conventional systems | Code |
| 1heat/1cool with fan control (gas/oil) | 11B |
| 2heat/1cool with fan control (gas/oil) | 61B |
| 1heat/2cool with fan control (gas/oil) | 16B |
| 2heat/2cool with fan control (gas/oil) | 66B |
| 1heat/1cool with fan control (electric) | 21B |
| 2heat/1cool with fan control (electric) | 71B |
| 1heat/2cool with fan control (electric) | 26B |
| 2heat/2cool with fan control (electric) | 76B |
See Setting the Primary/Advanced HVAC Control Configuration section for more details.