Operating instructions

4
WIRING THE POWER INPUTS
• Bring the 120VAC 60Hz power wires through a bottom knock out of the enclosure.
Class 1 voltages must enter the enclosure through a different opening from any
Class 2 wiring.
• Connect the hot line to terminal marked LINE.
• Connect the neutral line to the terminal marked NEUTRAL.
• The green ground screw must be connected to earth ground.
CONNECTING THE SENSORS
System Water Temperature
• The BCP-6/12 sensor is designed for immersion in a 3/8” ID well.
• Dip switches 6 and 7 must be OFF (unless using the External Set Point see pg. 16).
• Locate the sensor in the common header, where it will sense the output of all the
stages. If the sensor can not read the output of all the stages, it will not be able to
sequence properly.
• Temperature sensor wires can be extended up to 500’ by splicing with 18 gauge
shielded wire.
• Do not run sensor wire in conduit with line voltage.
• Temperature sensors have no polarity. Connect either wire from the sensor to
terminal 1 SENSOR.
• Connect the other sensor wire to terminal 2 COM.
• Connect the shield to terminal 3 SHIELD.
Outdoor Sensor
• The BCP-6/12 can be connected to a sensor which reads outdoor temperature.
• If using the BCP-6/12 for Reset Control (dip switch 8 is ON), the Outdoor Sensor
must be installed.
• If using the BCP-6/12 for Set Point control (dip switch 8 is OFF), the Outdoor Sensor
is optional. If it is installed, it provides an Outdoor Starter (see pgs. 10-11).
• Locate the sensor in the shade on the north side of the building.
• Be sure the location is away from doors, windows, exhaust fans, vents, or other
possible heat sources.
• The sensor should be mounted at least 4 inches away from the building wall and
approximately 10 feet above ground level.
• Temperature sensor wires can be extended up to 500’ by splicing with 18 gauge
shielded wire.
• Do not run sensor wire in conduit with line voltage.
• Temperature sensors have no polarity. Connect either wire from the sensor to
terminal 11.
• Connect the other sensor wire to terminal 12.
• Connect the shield (when needed) to terminal 3 SHIELD. (Both sensor shields will
be connected to terminal 3.)
Steam Pressure (Set Point Controls ONLY)
• The BCP-6/12 is designed to be connected to a two wire 4-20mA pressure trans-
ducer with a range of 0-30 psi.
• Dip switch 6 must be ON and dip switches 7 and 8 must be OFF.
• Locate the sensor on the main supply header where it will sense the output of all the
stages. If the sensor can not read the output of all the stages, it will not be able to
sequence properly.
• Attach a 1/4” isolation pigtail to the header.
• Screw the pressure sensor to the pigtail. The sensor has 1/4” NPT threads.
• Pressure sensor wires can be extended up to 500’ by splicing with 18 gauge wire.
• Do not run sensor wire in conduit with line voltage.
To Outdoor Sensor
located in shade
Shield
INPUTS
3
4
567
8
9
10
11
12
Shield
+
Sensor Com Dry Contact Only
Dry Contact Only
HEAT
DEMAND
DHW
PRESSURE
4-20mA
OUT
DOOR
INPUTS
Cut the Green,
White, and
Tube
Connect
to 1/4" pigtail
BLACK
RED
INPUTS
3
4
567
8
9
10
Shield
+
Sensor Com Dry Contact Only
Dry Contact Only
HEAT
DEMAND
DHW
PRESSURE
4-20mA
INPUTS
NEUTRAL
LINE
MUST BE
CONNECTED
POWER
To Temperature Sensor
i
n Common Header
Shield
123
4
5
Sensor Com Shield
+
Sensor
TEMP
P
RESSUR
4-20mA