Weil-McLain manual BCP-3 Output Modes Wiring

BCP-3 Installation and Operation Manual

BCP-3 Output Modes Wiring

BCP-3

SYSTEM			=			147F
TARGET			=			150F
	Boiler			SYS	2	DHW
Output 1			OutputPump			OutputPump 3
		SET
			T3+ T3- EXT+			P+ P- COM 24VAC
T1 COM T2 COM					EXT-

System Sensor	Outdoor Sensor	DHW Call	Enable Dry Contact		Setback Timer
		BCP-3
SYSTEM		=			147F
TARGET		=			150F
Boiler		SYS			DHW
		Pump			Pump
Output 1		Output 2		Output 3
	SET
T1 COM	T2 COM	T3+ T3- EXT+	EXT-	P+	P- COM 24VAC
System Sensor	Outdoor Sensor	DHW Call	Enable Dry Contact		Setback Timer

	L	120 VAC
	N
Power (Black)

Output capped

(White/Output 3)
Boiler
(Blue/
Output 2B)
L	120 VAC
N

System Pump (Yellow/Output 1)

Wiring 1 On/Off Boiler +

System Pump

	L	120 VAC
	N
Power (Black)

Boiler2

(White/

Output 3)

Boiler1

(Blue/

Output 2)

L 120 VAC

N

System Pump (Yellow/Output 1)

Wiring 2 On/Off Boilers +

System Pump

	BCP-3								L 120 VAC
SYSTEM	=			147F			Power (Black)		N
TARGET	=			150F
Boiler		SYS	2	DHW					3)
Output 1	OutputPump			OutputPump 3
SET									Pump (White/Output
T1 COM T2 COM T3+		T3- EXT+ EXT-		P+ P-	COM	24VAC
							Boiler		DHW
							(Blue/
							output 2)		L 120 VAC
Sensor					Timer				N
							System Pump
							(Yellow/Output 1)
System Outdoor Sensor		DHW Call	Enable Dry Contact		Setback		Wiring 1 On/Off Boiler +
							System Pump + DHW Pump
	BCP-3							L	120 VAC
SYSTEM	=			147F			Power (Black)	N
TARGET	=			150F

SYS DHW

Boiler Pump Pump

Output 1 Output 2 Output 3

	SET
T1 COM T2	COM T3+	T3- EXT+ EXT- P+ P-	COM 24VAC
				Boiler Lo	Boiler Hi
				(Blue/	(White/
				Output 2) Output 3)
SensorSystem SensorOutdoor		CallDHW ContactDryEnable	TimerSetback	L	120 VAC
				N
				System Pump
				(Yellow/Output 1)
				Wiring 1 Lo/Hi Boiler +
				System Pump

BCP-3

SYSTEM	=	147F
TARGET	=	150F
Boiler	SYS	DHW
	Pump	Pump
Output 1	Output 2	Output 3
SET

T1 COM T2 COM T3+ T3- EXT+ EXT- P+ P- COM 24VAC

System Sensor
				Setback Timer
	Outdoor Sensor
			Enable Dry Contact
		DHW Call

	L	120 VAC
	N
Power (Black)

Boiler 3 (White/ Output 3)

Boiler 2

(Blue/

Output 2)

Boiler 1 (Yellow/ Output 1)

Wiring 3 On/Off Boilers

NOTES:

•The BCP-3 does not source any output power to any of its relays. A power source must sup- ply the pumps with power and the control can break the hot leg.

•Weil McLain recommends not sharing the power source to the control with any pumps, boilers, or heavy electric 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.

•Eventhough in some Output Modes the BCP-3 does not control the DHW Pump, a DHW call will raise the System Target to whichever is lower of 200F or the Maximum Water Temp.

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