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BMC and BMC-6X Installation and Operation Manual
MULTIPLE MODULATING BOILERS
EXTERNAL 4-20MA SET POINT
USING 4-20MA EMS INTERFACE
Boiler 1
Boiler 2
Boiler 3
Boiler 4
Boiler 1
Boiler 2
Boiler 3
Boiler 4
4 - 20 mA
Signal Outputs
System Sensor
Prove Jumper
Do Not remove
BMC
SYSTEM
A
B
C
D
Full Modulation Sequencing Control
1
2
RUNPROGRAM
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
3
4
5
6
7
8
9
10
11
12
13
15
14
17
16
18
22
20
19
21
24
23
29
25
27
26
28
32
30
31
L
N
-
+
+
T
T
O
O
RS-485
mA
GND
VLT
SYS
A
B
C
D
PWR
CUR / VLT
A
-
+
+
mA
GND
VLT
-
+
+
mA
GND
VLT
-
+
+
mA
GND
VLT
+
mA
TEMP
OUTDOOR
O
O
TEMP
SYSTEM
EXTENSION
MODULE
CUR / VLT
B
CUR / VLT
C
CUR / VLT
D
------
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 30VA MAX
INPUT RATINGS:
USE COPPER WIRE,
CLASS 1 WIRE ONLY.
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
CAUTION
: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
420MOD
4-20mA INPUT
+
Signal GND
1
2
3
RS485
EXTENSION
CONNECTORS
420MOD EMS Interface
To EMS/BMS
4-20mA Set Point
SYSTEM
PROVE
SHUTDOWN
/TSTAT
/SETBACK
L
N
System Pump
L
N
CUS