Weil-McLain manual BCP-3 Plumbing Diagrams

BCP-3 Installation and Operation Manual

BCP-3 Plumbing Diagrams

	Outdoor			BCP-3
		SYSTEM		=			147F
		TARGET		=			150F
	Sensor	Boiler			SYS		DHW	3)
					Pump		Pump
		Output 1		Output 2			Output 3
			SET					White Wires (Output
Piping 1 On/Off Boiler +		} System Sensor	} Outdoor Sensor	} DHW Call Dry Contact		} Enable Dry Contact	} Setback Dry Contact
System Pump + DHW Pump
Yellow(OutputWires1)	System	T1 COM	T2 COM	T3+	T3-	EXT+ EXT-	P+ P- COM 24VAC
	Pump
Building								2)
Heat		System						(Output
NOTES:		Sensor
• The BCP-3 does not source any output power to any of its
relays. A power source must supply pumps with power and								Wires
the control can break the hot leg.		Boiler
• Weil McLain recommends using a separate power source
to the control from any pumps, boilers, heavy electric								Blue
equipment.
• When wiring a sensor to the BCP-3, connect the Shield to
the COM terminal on the BCP-3 end. DO NOT connect
the Shield at the sensor end.

• Weil McLain is aware that each installation is unique.	DHW Pump
Thus, any wiring or piping diagrams in this document
are to represent control operation concept only.

Aquastat

DHW

Indirect

BCP-3

SYSTEM	=	147F
TARGET	=	150F
Boiler	SYS	DHW	3
Output 1	OutputPump	2 OutputP mp

Outdoor

Sensor

					SET
1)	2)	WhiteWires	(Output3)
Wires(Output	Wires(Output			T1 COM T2	COM T3+	-T3 EXT+	-EXT	P+ -P	COM 24VAC
				SensorSystem	SensorOutdoor	ContactDryCallDHW	ContactDryEnable	ContactDrySetback		Piping 3 On/Off Boilers
				} } } } }
Yellow	Blue								System
Building									Pump
Heat									System
									Sensor
	Boiler1			Boiler2					Boiler3	Aquastat
										DHW
										Indirect
										DHW
										Pump

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