Weil-McLain BCP-8S Operations Instructions

1INSTALLATION/OPERATING INSTRUCTIONSBCP-6 and BCP-12Lead-Lag System for up to 12 Stages of OutputOperates as either an Outdoor Reset Control or as a S

10* Value can not be adjustedOUTDOOR RESET CONTROLDip Switch 6 and 7 - OFF and 8 - ON DISPLAY Press and hold either the UP or DOWN button to adjust th

11TEMPERATURE SET POINT CONTROLDip Switch 6 and 8 - OFF DISPLAY Press and hold either the UP or DOWN button to adjust the valueTwice *Outdoor TempThis

12 OPERATIONOUTDOOR RESET DISPLAY SETTINGS (WATER)CALCULATEDSelect button pressed ONCE• This is the water temperature the BCP-6/12 will stage units to

13RESET RATIO DEFAULT is 7Select button pressed 5 Times• The Reset Ratio controls how much heat will be added based on outdoor tempera-ture. The

14SET POINT DISPLAY SETTINGS (WATER or STEAM)SET POINTSelect button pressed ONCE• The Set Point is the temperature or pressure value the BCP-6/12 will

15PURGE TIME DEFAULT is 0Select button pressed 6 Times• Many units must go through a purge cycle before they are brought on line and can begin gen

16 4-20mA Input Set Point 4 110°F 6 122°F 8 135°F 10 147°F 12 160°F 14 172°F 16 185°F 18 197°F 20 210°F OUTPUT CONTROLSMANUAL OVERRIDES• Ea

17INTERFACE MODE• The BCP-6/12 can be connected to the BCP-4 for commercial hot water heat applications.• The BCP-4 can directly control up to 4 outpu

18TROUBLESHOOTINGNo Display, or Display of 888Check the 120VAC power input to the BCP-6/12. Turn power to the panel off andback on.TEMPERATURE INPUTS

19EXTERNAL SET POINT INPUTSet Point changes when the knob is rotatedCheck the dip switch (pg. 3).Set Point always reads OFFCheck the wiring is appropr

2INSTALLATIONMOUNTING THE BCP-6/12• Select a location near the equipment to be controlled.• The surface should be flat, and be sufficiently wide and s

20Red stage light is not lit, but the System Combustion Air Damper or Pump is onThe BCP-6/12 is not calling for the unit to run. Remove any wires att

3DIP SWITCH CHART123 45678ONSwitch 1System OutputSwitches 2, 3, and 4Stage TypeSwitch 5RotationSwitches 6 and 7Input Type2Stage Lo/Lo/Hi/HiOn load inc

4WIRING THE POWER INPUTS• Bring the 120VAC 60Hz power wires through a bottom knock out of the enclosure.Class 1 voltages must enter the enclosure thro

5Dry Contact HeatDemand SignalINPUTS67891nsor Com Dry Contact OnlyDry Contact OHEATDEMANDDHWSUREmAINPUTS• Pressure sensors have polarity. If the sens

6INTERFACING TO A BCP-4 OUTDOOR RESET CONTROL• The BCP-4 is a commercial outdoor reset control for heat which can directly controlup to four output st

72 Stage (Lo/Hi) Units(Refer to Chart below)• Each unit has two relays and two OUTPUTS associated with it.• Check the chart for the Lo and Hi stage ou

8For automatic leadstage rotationINCREMENTAUTOLEAD STAGE ROTATIONOFFFor non-activestagesFor stages whichare to be part ofthe automaticsequenceSTAGE 1O

9UPDOWNSELECTSETTINGControl ParameterdisplayPress to scrollthrough controlparametersPress andhold toadjustdno or d_P - NO DHW Priority or DHW Priority