Weil-McLain BCP-3 - Manual (Page 6)

6
BCP-3 Installation and Operation Manual
T1 T2 COM COM T3+ T3- EXT+ EXT
-
P+ P- COM 24V
AC
S
y
st
em S
ensor
Out
door S
ensor
Enable Dr
y C
o
ntac
t
S
etback Timer
120 VAC
Wiring 1 Lo/Hi Boiler +
System Pump
System Pump
(Yellow/Output 1)
Boiler Lo
(Blue/
Output 2)
Boiler Hi
(White/
Output 3)
DHW C
all
Power (Black)
120 VAC
L
N
L
N
T1 T2 COM COM T3+ T3- EXT+ EXT
-
P+ P- COM 24V
AC
S
y
st
em S
ensor
Out
door S
ensor
Enable Dr
y C
o
ntac
t
S
etback Timer
Boiler
(Blue/
Output 2B)
Output capped
(White/Output 3)
Wiring 1 On/Off Boiler +
System Pump DHW C
all
Power (Black)
120 VAC
L
N
120 VAC
L
N
System Pump
(Yellow/Output 1)
T1 T2 COM COM T3+ T3- EXT+ EXT
-
P+ P- COM 24V
AC
S
y
st
em S
ensor
Out
door S
ensor
Enable Dr
y C
o
ntac
t
S
etback Timer
DHW C
all
DHW P
ump (
W
hit
e/Output 3)
Boiler
(Blue/
output 2)
Wiring 1 On/Off Boiler +
System Pump + DHW Pump
Power (Black)
120 VAC
L
N
System Pump
(Yellow/Output 1)
120 VAC
L
N
T1 T2 COM COM T3+ T3- EXT+ EXT
-
P+ P- COM 24V
AC
S
y
st
em S
ensor
Out
door S
ensor
Enable Dr
y C
o
ntac
t
S
etback Timer
Wiring 2 On/Off Boilers +
System Pump
Boiler1
(Blue/
Output 2)
Boiler2
(White/
Output 3)
DHW C
all
Power (Black)
120 VAC
L
N
120 VAC
L
N
System Pump
(Yellow/Output 1)
T1 T2 COM COM T3+ T3- EXT+ EXT
-
P+ P- COM 24V
AC
S
y
st
em S
ensor
Out
door S
ensor
Enable Dr
y C
o
ntac
t
S
etback Timer
Wiring 3 On/Off Boilers
Boiler 2
(Blue/
Output 2)
Boiler 3
(White/
Output 3)
Boiler 1
(Yellow/
Output 1)
DHW C
all
Power (Black)
120 VAC
L
N
Boiler SYS
Pump
DHW
Pump
SET SET
SYSTEM = 147F
TARGET = 150F
Boiler SYS
Pump
DHW
Pump
SET SET
SYSTEM = 147F
TARGET = 150F
Boiler SYS Pump DHW
Pump
SET SET
SYSTEM = 147F
TARGET = 150F
Boiler SYS Pump DHW
Pump
SET SET
SYSTEM = 147F
TARGET = 150F
Boiler SYS
Pump
DHW
Pump
SET SET
SYSTEM = 147F
TARGET = 150F
BCP-3
BCP-3 BCP-3
BCP-3 BCP-3
Output 1 Output 2 Output 3 Output 1 Output 2 Output 3
Output 1 Output 2 Output 3 Output 1 Output 2 Output 3
Output 1 Output 2 Output 3
BCP-3 Output Modes Wiring
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.