Weil-McLain Wiring To Modulating Motors, CONNECTING TO THE BMC-6XPANELS, BMC-6XA, BMC-6XB

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.

	A
CUR / VLT			CUR
GND	mA	VLT	GND
-	+	+	-
13	14	15	16	1

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.

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.

-4-20mA + Burner

Motor

Boiler 4-20mA

Modulation Output

CD

UR / VLT						CUR / VLT
D		mA		VLT		GND		mA	VLT
	+		+		-		+		+
9	20		21 22				23		24

		Voltage
GND			V+
		Burner
		Motor
	Boiler Voltage
Modulation Output

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'.

BMC

BMC-6X A

PWR

LN

1 2

BMC

SYSTEM

Full Modulation Sequencing Control

OUTPUT RATINGS:

120VAC, 6A RESISTIVE

A

1A PILOT DUTY, 15A TOTAL

FOR ALL CIRCUITS

INPUT RATINGS:

B

---

---

115VAC 60Hz , 30VA MAX

USE COPPER WIRE,

C

CLASS 1 WIRE ONLY.

C

US

D

ENCLOSED

ENERGY

MANAGEMENT

EQUIPMENT

CAUTION: RISK OF ELECTRIC SHOCK

LISTED

More than one disconnect switch may be required

99RA

to de-energize the equipment before servicing.

PROGRAM

RUN

DO NOT APPLY ANY VOLTAGE

TO INPUT TERMINALS

SYS

A

B

C

D

A

B

C

D

OUTDOOR

SYSTEM

PROVE

SHUTDOWN

/TSAT

CUR / VLT

CUR / VLT

CUR / VLT

CUR / VLT

TEMP

TEMP

/DHW

/SETBACK

GND

mA

VLT

GND

mA

VLT

GND

mA

VLT

GND

mA

VLT

T

O

T

O

O

O

-

+

+

-

+

+

-

+

+

-

+

+

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

EXTENSION MODULE

RS-485

BMC-6X

Full Modulation Sequencing Extension

		E K	F L	OUTPUT RATINGS:
C	US			120VAC, 6A RESISTIVE
		G M	H N	1A PILOT DUTY, 15A TOTAL
ENCLOSED				FOR ALL CIRCUITS
ENERGY		I O	J P	INPUT RATINGS:
MANAGEMENT
EQUIPMENT				115VAC 60Hz, 12VA MAX
LISTED				Use Copper Conductors Only.
99RA		Comm	Power

CAUTION: Risk of Electric Shock. More than one disconnect switch may be required to de-energize the equipment before servicing.

Ext A

Ext B

PWR

E K

F L

G M

H N I O J P

I

O

J P

CUR / VLT CUR / VLT

L

N

GND

GND

GND

GND

GND

mA

VLT GND mA VLT

1

2

3

4

5

6

7

8

9

10 11 12 11 12

13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 2816 29 30

BMC-6X B

BMC-6X

EXTENSION

MODULE

RS-485

Connecting BMC to Two Extension Panels using RS485

Full Modulation Sequencing Extension

		E K	F L	OUTPUT RATINGS:
C	US			120VAC, 6A RESISTIVE
		G M	H N	1A PILOT DUTY, 15A TOTAL
	ENCLOSED			FOR ALL CIRCUITS
	ENERGY	I O	J P	INPUT RATINGS:
	MANAGEMENT
	EQUIPMENT			115VAC 60Hz, 12VA MAX
	LISTED			Use Copper Conductors Only.
	99RA	Comm	Power
				CAUTION: Risk of Electric Shock.
				More than one disconnect switch may be required
				to de-energize the equipment before servicing.

Ext A

Ext B

PWR

E K

F L

G M

H N I O J P

I

O

J P

CUR / VLT CUR / VLT

L

N

GND

GND

GND

GND

GND

mA

VLT GND mA VLT

1

2

3

4

5

6

7

8

9

10 11 12 11 12

13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 2816 29 30

EXTENSION

MODULE

RS-485

11