Installation; Mounting The Controller - Weil-McLain BCP-3 Installation & Operating Instructions Manual

DEFINITIONS
The following defined terms are used throughout this
manual to bring attention to the presence of hazards
of various risk levels, or to important information
concerning the life of the product.
W A R N I N G
Indicates presence of hazard
which can cause severe personal
injury, death or substantial
property damage if ignored.
Indicates presence of hazard
C A U T I O N
which will or can cause minor
personal injury or property
damage if ignored.

MOUNTING THE CONTROLLER

• The BCP-3 is designed to mount on a standard 1900 (4"x4") electrical box (not supplied).
• If panel mounting, or if additional room is needed for wiring, an extension skirt is available.
• Locate the BCP-3 in a convenient location near the unit to be controlled.
• Mount the unit away from excessive heat or cold. Ambient operating temperature is from 20 to 120°F.
• After completing all the wiring connections (see below) use the two screws provided to mount the BCP-3 to the 1900 box.
INSTALL THE HEATING SYSTEM SENSOR
• The BCP-3 heating system sensor is designed to be installed in a 3/8" ID well.
• Locate the sensor in the common header, where it will register the output of all the boiler stages. If the sensor can not read the
output of all the stages, the control will not be able to sequence properly.
• The 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.
• The sensor has no polarity. Connect either
sensor wire to the front terminal marked SYS.
• Connect the other sensor wire and the shield
(where needed) to a front terminal marked
COM.
INSTALL THE OUTDOOR SENSOR
• 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.
• The 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.
• The sensor has no polarity. Connect either
sensor wire to the front terminal marked OUT.
• Connect the other sensor wire and the shield
(where needed) to a front terminal marked
COM.
The Weil-McLain BCP-3 is strictly an operating control;
do not use as limit(s) or safety control(s). Each boiler
must have its own certified limit and safety controls as
required by codes. These controls are the responsibility
of the installing contractor. He must verify proper
operation and correct any safety problems before
installing the BCP-3.
Failure to follow all instructions in proper order can
cause severe personal injury, death or substantial
property damage. Read all instructions before installing
Weil-McLain BCP-3.

INSTALLATION

= Computed Temp
= Outdoor Temp
= Fine Tune
= Outdoor Starter
= Reset Ratio
= Reaction Time
SYS COM OUT COM
Heating System
Sensor
Outdoor Sensor
W A R N I N G
BCP-3
ORANGE
OUTPUT
UP
SELECT SETTING
BLUE
DOWN
HEAT
DEMAND
Heat Demand Input
Dry Contact Only
Output
3
BLACK
Output
2
RED
Output
1
120VAC
Power
NOTE:
COM terminals
are connected
internally and are
interchangeable.
2