WM-ODR Outdoor Reset Control is a cost-effective answer for outdoor reset and may conserve energy when installed on most heating systems. It is designed to raise or lower the temperature of the boiler supply water based upon a proportionate drop or rise in temperature at the outside sensor.
The Weil-McLain WM-ODR Outdoor Reset Control is a device designed to raise or lower boiler supply water temperature based on outside sensor readings. It provides adjustable settings for maximum temperature, reset ratio, and differential to optimize energy conservation in most heating systems.
This manual covers the installation of the outdoor sensor (North side/shaded) and water supply sensor, as well as wiring configurations for Weil-McLain WMCR Circulator Zone Controllers and WMZV Zone Valve Controllers. It includes setup instructions for adjusting the reset ratio dial, max temp dial, and differential trim pot.
| Power supply | 20-28 VAC |
|---|---|
| Relay capacity | 2 VA |
| Sensor resistance | 1000 ohms @ 70˚F |
| Reset Ratio range | 0.5 to 1.5 |
| Max Temp range | 150˚ to 210˚ |
| Differential range | 5˚ to 15˚ |
Install on the North side or a shaded side of the building, at least 10 feet above grade.
It prevents quick cycling of the boiler by turning it off when water is 10°F above the control point.
Yes, add a jumper between ZC and L when using WMCR with WM-ODR.