Weil-McLain BMC Boiler User Manual


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11
BMC and BMC-6X Installation and Operation Manual
WIRING TO MODULATING MOTORS
The BMC can modulate any combination of the following motors. The Output Type must be selected properly
before connecting any output wires to avoid damage components. See Output Type on page 11.
WIRING THE 4-20MA MODULATING MOTORS (A TERMINALS 13, 14), (B TERMINALS 16, 17),...
• The BMC can operate up to four 4-20 mA modulating motors.
• The BMC-6X can operate up to six 4-20 mA modulating motors.
• The BMC and the BMC-6X sources 24VDC excitation voltage for the 4-20mA signal.
• Wire the (-) from the modulating motor to the boiler terminal on the BMC marked (GND). That is for boiler A,
the modulating (-) terminal will be 13.
• Wire the (+) from the modulating motor to the boiler terminal on the BMC marked (mA). That is for boiler A,
the modulating (-) terminal will be 14.
13
15
14
1
16
-
+
+
mA
GND
VLT
CUR / VLT
A
-
GND
CU
R
Boiler 4-20mA
Modulation Output
4-20mA
Burner
Motor
-
+
WIRING THE VOLTAGE MODULATING MOTORS (A TERMINALS 13, 15), (B TERMINALS 16, 18),...
• The BMC can operate up to four 0-5V, 0-10V, 1-5V, or 2-10V modulating motors.
• The BMC-6X can operate up to six 0-5V, 0-10V, 1-5V, or 2-10V modulating motors.
• Wire the (GND) from the modulating motor to the boiler terminal on the BMC marked (GND). That is for
boiler D, the modulating (GND) terminal will be 22.
• Wire the (V+) from the modulating motor to the boiler terminal on the BMC marked (VLT+). That is for
boiler D, the modulating (V+) terminal will be 23.
22
20
9
21
24
23
+
+
mA
D
VLT
-
+
+
mA
GND
VLT
+
mA
U
R / VLT
C
CUR / VLT
D
Boiler Voltage
Modulation Output
Voltage
Burner
Motor
GND
V+
CONNECTING TO THE BMC-6X PANELS
• The BMC is equipped with a 6-pin phone socket (RS485) to connect to extension panels. The BMC-6X is equipped with two
6-pin phone sockets to connect to BMC and an additional BMC-6X.
• Configure the Output Types (see page 11) after connecting the Extension panels to be able to configure their outputs.
• Only 6-wire phone cable must be used for proper operation.
• Connection cable is provided as part of the BMC-6X package.
• Phone cables must be of a 6-wire with 6-pin terminals. Phone cables can extend up to 100'.
Full Modulation Sequencing Extension
F
H
J
Power
CAUTION:
Risk of Electric Shock.
More than one disconnect switch may be required
to de-energize the equipment before servicing.
PWR
LN
12
E
34
F
56
G
78
H
910
I
11 12
EXTENSION
MODULE
RS-485
Ext A
INPUT RATINGS:
115VAC 60Hz, 12VA MAX
Use Copper Conductors Only.
OUTPUT RATINGS:
120VAC, 6A RESISTIVE
1A PILOT DUTY, 15A TOTAL
FOR ALL CIRCUITS
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
E
G
I
Comm
Ext B
K
M
O
L
N
P
1514
VLTmA
CUR / VLT
181716
VLTmAGND
CUR / VLT
212019
VLTmAGND
CUR / VLT
242322
VLTmAGND
CUR / VLT
J
11 12
K M OL N P
EFGH
K ML N
13
GND
16
GND
19
GND
22
GND
2726
VLTmA
CUR / VLT
302916
VLTmAGND
CUR / VLT
25
GND
28
GND
IJ
O P
BMC-6X A
BMC-6X
Full Modulation Sequencing Extension
F
H
J
Power
CAUTION:
Risk of Electric Shock.
More than one disconnect switch may be required
to de-energize the equipment before servicing.
PWR
LN
12
E
34
F
56
G
78
H
910
I
11 12
EXTENSION
MODULE
RS-485
Ext A
INPUT RATINGS:
115VAC 60Hz, 12VA MAX
Use Copper Conductors Only.
OUTPUT RATINGS:
120VAC, 6A RESISTIVE
1A PILOT DUTY, 15A TOTAL
FOR ALL CIRCUITS
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
E
G
I
Comm
Ext B
K
M
O
L
N
P
1514
VLTmA
CUR / VLT
181716
VLTmAGND
CUR / VLT
212019
VLTmAGND
CUR / VLT
242322
VLTmAGND
CUR / VLT
J
11 12
K M OL N P
EFGH
K ML N
13
GND
16
GND
19
GND
22
GND
2726
VLTmA
CUR / VLT
302916
VLTmAGND
CUR / VLT
25
GND
28
GND
IJ
O P
BMC-6X B
Connecting BMC to
Two Extension Panels
using RS485
BMC
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
m
A
G
N
D
V
L
T
SYS
A
B
C
D
PWR
CUR / VLT
A
-
+
+
m
A
G
N
D
V
L
T
-
+
+
m
A
G
N
D
V
L
T
-
+
+
m
A
G
N
D
V
L
T
+
m
A
TEMP
O
U
T
D
O
O
R
O
O
TEMP
S
Y
S
T
E
M
EXTENSION
MODULE
CUR / VLT
B
CUR / VLT
C
CUR / VLT
D
------
P
R
O
V
E
/D
H
W
S
H
U
T
D
O
W
N
/S
E
T
B
A
C
K
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.
BMC-6X
CUS
/T
S
AT
CUS
CUS
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