Weil-McLain BCP-3 Installation & Operating Instructions Manual

1, 1 How the BCP-3 operates... The BCP-3 establishes ambient comfort by varying the tempera- ture of the heating system's circulating hot water in response to changes in the outdoor temperature. In addition, it provides an outdoor temperature based start/stop and system pump control for…

4, 4 INITIAL CONTROL START-UP • Whenever the BCP-3 is powered up, it will display the software version number and then the current operating parameters. Each display will remain on the screen approximately 5 seconds. If the parameters are correct, there is no need to make any adjust…

3, 3 WIRING THE HEAT DEMAND INPUT • If the HEAT DEMAND inputs are open, the BCP-3 will not energize any output stages. • The BCP-3 is shipped with a jumper across the HEAT DEMAND inputs. DO NOT remove this jumper unless you replace it with a dry contact switch which is closed when heat is r…

5, Weil-McLain BCP-3 5 DISPLAY CHART AND ADJUSTMENTS DISPLAY Press and hold either the UP or DOWN button to adjust the value Once * Computed This is the water temperature the BCP-3 will control boilers to hold. It is based on the outdoor temperature, reset ratio, and the fine tune value. If ON is sh…

7, 7 LEAD STAGE ROTATION • For the single boiler and lo/hi boiler operating mode, when heat is required, the first stage brought on is Output 1 (see output chart pg. 3). • For the 2 and 3 boiler operating modes, the lead stage will rotate among the boilers to promote even wear on…