BSC Installation and Operation Manual
550-100-074/0408
BSC
MADE IN U.S.A.
PREV.
SAFETY
GROUND
MUST BE
CONNECTED
OUTDOOR
TEMP
SYSTEM
PROVE
STAGE
A
STAGE
B
MENU FUNCTIONS
SELECT
enters menus or accepts changes
ADJUST
selects menu items or changes settings
BACK
returns to previous menu
STAGE
selects stage menus or next stage
PREV./NEXT
steps through output status
SYSTEM
L
I
N
E
N
E
U
T
R
A
L
STAGE
HELP
NEXT
PRESS TO
SELECT
BACK
ADJUST
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
B1
B2
B3
B4
NETWORK
4-20mA
SHUTDOWN
SYSTEM
TEMP
INPUTS
A
C
D
<A> B C D
100 53 OFF STBY
OD= 31
o
F SYS= 114
o
F
B
SYS
A
OPERATING LIMIT
OUTPUTS
C
D
B
T
T
1
2
3
4
5
6
7
8
9
11
10
OUTPUT RATINGS:
120VAC, 6A RESISTIVE
1A PILOT DUTY
15A TOTAL
FOR ALL CIRCUITS
INPUT RATINGS:
115VAC 60Hz
30VA MAX
USE COPPER WIRE,
CLASS 1 WIRE ONLY
S
+
DO NOT APPLY ANY VOLTAGE
TO SENSOR TERMINAL
FULL MODULATION
SEQUENCING CONTROL
LOCKOUT
INPUTS
STAGE
C
STAGE
D
B5
B6
B7
B8
EMS INPUT
+
SIGNAL
SHIELD
12
A
B
C
D
MODULATION OUTPUTS
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
US
C
UL
R
GND
mA
Volt
-
+
+
GND
mA
Volt
-
+
+
GND
mA
Volt
-
+
+
GND
mA
Volt
-
+
+
INSTALLATION AND OPERATION INSTRUCTIONS MANUAL
BSC
Modulating Control
BSC-BAC
Modulating BACnet Control
BSC-8X
Modulating Extension
This Weil McLain control is strictly an operating control; it should never be used as a
primary limit or safety control. All equipment must have its own certified limit and safety
controls required by local codes. The installer must verify proper operation and correct any
safety problems prior to the installation of this Weil McLain control.
WARNING
MODULATING BOILER CONTROL WITH BACNET COMMUNICATION OPTION
