Weil-McLain BSC Service-Handbuch

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

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

LINE

NEUTRAL

STAGE

HELP NEXT

PRESS TO

SELECT

BACK

ADJUST

A10

A11

A12

NETWORK

4-20mA

SHUTDOWN

SYSTEM

TEMP

INPUTS

ACD

<A> B C D

100 53 OFF STBY

OD= 31oF SYS= 114oF

SYS A

OPERATING LIMIT

OUTPUTS

CDB

123456789 1110

OUTPUT RATINGS:

120VAC, 6A RESISTIVE

1A PILOT DUTY

15ATOTAL

FOR ALL CIRCUITS

INPUT RATINGS:

115VAC 60Hz

30VA MAX

USE COPPER WIRE,

CLASS 1 WIRE ONLY

DO NOT APPLY ANY VOLTAGE

TO SENSOR TERMINAL

FULL MODULATION

SEQUENCING CONTROL

LOCKOUT

INPUTS

STAGE

EMS INPUT

+SIGNAL SHIELD

ABCD

MODULATION OUTPUTS

ENCLOSED

ENERGY

MANAGEMENT

EQUIPMENT

LISTED

99RA

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

BSC Installation and Operation Manual

Content

BSC FUNCTION CHART . . . . . . . . . . 3

BSC OVERVIEW . . . . . . . . . . . . . . 4

Reset Ratio/Outdoor Reset ..........5

INSTALLATION . . . . . . . . . . . . . . . 6

Mounting the Enclosure ............6

Wiring the Power . ...............6

Input Wiring. ................ 6

Wiring the Outdoor sensor ...........6

Wiring The System Sensor. ..........7

Wiring an External Set Point (4-20mA Input) . 7

Wiring the Shutdown . .............7

Wiring the System Prove . ...........8

Wiring the Lockout Inputs ...........8

Wiring A Setback . ...............8

Output Wiring. ............... 9

Wiring the System Output ...........9

Wiring the Stage Outputs ...........9

Modulating Output Card ..........10

BACnet Communication Wiring ......10

Wiring The BSC to Extension Panels . . . 11

USING THE MENUS. ............12

Menu Basics .................12

The Main Display. ..............12

Display Stage Modulation Status. ......12

Display Messages ..............12

SYSTEM STARTUP . . . . . . . . . . . . . 13

Startup Sequence ..............13

Sensor Type .................13

EMS Input Mode ...............13

4 & 20mA Set Points .............16

Output Type .................16

Modulating Mode . ..............16

Operating Mode ...............16

Heat/Cool Mode ...............17

Sensor Fault .................17

MENU SETTINGS . . . . . . . . . . . . . . 14

MENU SETTINGS CONTINUED. ......15

OPERATING SETTINGS . . . . . . . . . . 17

Set Point ...................17

Outdoor Cutoff Temperature .........17

Reset Ratio. .................18

Offset . ....................18

Minimum Water Temperature ........18

Gain/Throttle .................19

Lead Stage . .................19

Lead Auto Rotate. ..............19

Purge Delay .................20

Lag Delay ..................20

Standby Time. ................20

System Run-On ...............21

Setback. ...................21

Rotate Time .................21

Last-Stage-Hold ...............21

$YRLG&RQÀLFWLQJ%RLOHU/LPLWV ........22

Set Point and Default Table .........22

SECURITY . .................23

Enable the Password. ............23

Change the Password ............23

Set the Time .................23

STAGE SETTINGS . . . . . . . . . . . . . 24

The Stage Menu ...............24

Moving around the Stages Menus ......24

Mode .....................24

Ignition %. ..................25

Modulation Start ...............25

Copy Settings (Stage A Only) ........26

MAINTENANCE . . . . . . . . . . . . . . . 27

System and Outdoor Trim ..........27

Stage Output Trim ..............27

Soft-off Delay. ................27

Modulation Speed ..............27

BACNET COMMUNICATION . . . . . . . . 28

BACnet Communication Option .......28

BACnet Device ID ..............28

IP Address ..................28

Mask Address ................28

Gateway Address ..............28

BSC BACnet Variable List ..........28

TROUBLESHOOTING. ...........30

BSC SPECIFICATIONS . . . . . . . . . . . 32

BSC Installation and Operation Manual

BSC FUNCTION CHART

BSC

MADE IN U.S.A.

PREV.

SAFETY

GROUND

MUST BE

CONNECTED

OUTDOOR

TEMP

SYSTEM

PROVE

STAGE

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

LINE

NEUTRAL

STAGE

HELP NEXT

PRESS TO

SELECT

BACK

ADJUST

A10

A11

A12

NETWORK

4-20mA

SHUTDOWN

SYSTEM

TEMP

INPUTS

ACD

<A> B C D

100 53 OFF STBY

OD= 31oF SYS= 114oF

SYS A

OPERATING LIMIT

OUTPUTS

CDB

123456789 1110

OUTPUT RATINGS:

120VAC, 6A RESISTIVE

1A PILOT DUTY

15ATOTAL

FOR ALL CIRCUITS

INPUT RATINGS:

115VAC 60Hz

30VA MAX

USE COPPER WIRE,

CLASS 1 WIRE ONLY

DO NOT APPLY ANY VOLTAGE

TO SENSOR TERMINAL

FULL MODULATION

SEQUENCING CONTROL

LOCKOUT

INPUTS

STAGE

EMS INPUT

+SIGNAL SHIELD

ENCLOSED

ENERGY

MANAGEMENT

EQUIPMENT

LISTED

99RA

ABCD

MODULATION OUTPUTS

GND mA Volt

-++

GND mA Volt

-++

GND mA Volt

-++

GND mA Volt

-++

From heating system sensor

When closed, all stages

are turned off*

Setback

From outdoor sensor mounted

in the shade

Connect to remote 4-20mA

set point signal or to dry-contac

setback signal

If a unit is in LockOut, the BSC

will not consider it an active stag

Depress the knob to move

forward through the menus and to

accept changes. To change a

setting's value, rotate the knob.

Depress the button to go back

through the menus

Digital display shows the system status,

setpoint, lead stage <in brackets>, and

status of each stage. To view and adjust

settings, press the Adjust/Select button.

Checks status of system

components*

Green Ground

screw must be

connected to

Earth Ground

System output controls

pumps, valves or other

system components.

The modulation outputs can be 0-5V, 0-10V,

1-5V, 2-10V, 4-20mA, 0-135 Ohm. Different output

boards mount on the back of the BSC to

determine the type of output.

Each N.O. output is wired in series

with the each unit's limit circuit.

BSC Installation and Operation Manual

BSC OVERVIEW

Sequences up to 4 Fully Modulating Stages

The BSC is the perfect control whenever multiple fully modulating stages are required for heating or cooling applications. The BSC

controls the modulation of each stage to maintain precise set point control.

PID Type Logic

The BSC’s control algorithm allows it to look at the rate of change in the system. If the system temperature/pressure is changing

quickly, the BSC will react quickly to adjust the stages’ modulating output. If the system temperature/pressure changes slowly, the

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around the set point.

Controls 0-5V, 0-10V, 1-5V, 2-10V, 4-20 mA, or 0-135modulating motors

The BSC is designed to accurately control the output from 0 to 100% of modulation for each of these different types of motors. One

BSC can even control two different types of motors.

Process or Normal Applications

The BSC controls the stages based on the type of logic selected. It offers a Normal (PID) logic for slow responding systems. This

option is useful in heating applications where In addition, it offers a Process option for systems that requires fast response.

Digital Display of all System Settings

The BSC’s 80 character alphanumeric digital display names each system parameter in plain English and shows its precise value. The

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Automatic Rotation among Stages

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Manual, Last-On, or Automatic every selected time period from every hour to every 41 days.

Outdoor Reset Control

The BSC has a stand-alone hydronic outdoor temperature reset function (When Sensor Type is set to Reset °F or Reset °C.). This

allows it to change the target set point based on outdoor temperature changes.

Connects to Energy Management Systems

BSCs can accept a 4-20 mA input signal from an EMS to adjust the temperature set point remotely. In addition, an Energy

Management System (EMS) or other controller can disable the BSC when there is no output requirement.

Monitors Stage Status

The BSC is designed to accept Lockout inputs from each stage. If any stage is in Lockout, the BSC will automatically skip it when

adding more capacity. If a stage goes into Lockout during normal operation, the next stage will be activated immediately to maintain

the desired output capacity.

System Output is Active when Any Stage is Active

This output can be used to activate a system pump, combustion air damper, or perform any other function that is required when any

stage is active. A System Prove input checks the status of components activated by the System output before stages can be activated.

BACnet IP Remote Communication Upgrade Available

The BSC can be upgraded to include a BACnet IP remote communication package to monitor and control all BSC functions from a

remote location.

BSC Installation and Operation Manual

UNDERSTANDING OPERATION CONCEPT

The BSC has multiple operating modes that satisfy most hydronic systems. It can change the

System Set Point based on outdoor temperature (Outdoor Reset) or it can modulate its stages

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In Outdoor Reset, the BSC controls a hot water heating system to provide a building with

comfortable and even heat levels. The BSC varies the temperature of the circulating heating

water in response to changes in the outdoor temperature. The heating water temperature is

controlled through the modulation of the stages.

The BSC also controls the system circulating pump with an adjustable Outdoor Cutoff. When

the outdoor temperature is above Outdoor Cutoff, the pump is off and no heating water is

circulated through the system. When the outdoor temperature drops below the Outdoor Cutoff,

the system pump relay is activated and the heating water circulates through the system. The

temperature of the heating water is controlled by the Reset Ratio, Water Offset, and the Outdoor

temperature.

RESET RATIO/OUTDOOR RESET

When a building is being heated, heat escapes through the walls, doors, and windows

to the colder outside air. The colder the outside temperature, the more heat escapes. If

you can input heat into the building at the same rate that it is lost out of the building,

then the building temperature will remain constant. The Reset Ratio is an adjustment

that lets you achieve this equilibrium between heat input and heat loss.

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temperature drops, the temperature of the heating water will increase one degree. The

starting point of the curves is adjustable, but comes factory selected at 70°F Outdoor

Temperature and 100°):DWHU7HPSHUDWXUH)RUH[DPSOHZLWKD2'6<6

ratio, if the outdoor temperature is 50°F, this means the temperature has fallen 20°from

the starting point of 70°F. Therefore, the heating water temperature will increase 20°to

120°F.

Each building has different heat loss characteristics. A very well insulated building will

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2 degrees to increase the water temperature 1 degree. On the other hand, a poorly

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temperature will increase 2 degrees. The BSC has a full range of Reset Ratios to match

any buildings heat loss characteristics.

A heating curve that relies not only on Outdoor temperature but also on type of radiation

will improve heat comfort. The following are suggested initial settings for different

types of radiation based on average building insulation and heat loss. The contractor

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Type of Radiation in Building Reset Ratio Offset

Radiators (Steel & Cast Iron) 1.00 (OD) : 1.00 (SYS) Û)

Baseboard (Finned copper tube& Cast Iron) 1.00 (OD) : 1.00 (SYS) Û)

Radiant (High Mass/Concrete) 4.00 (OD) : 1.00 (SYS) Û)

Radiant (Low Mass/Joists) 2.00 (OD) : 1.00 (SYS) Û)

Fan Coils & Air Handlers 1.00 (OD) : 1.00 (SYS) Û)

Outdoor Temperature

Water Temperature

70 405060

130

120

110

100

Outdoor Temperature

Water Temperature

70 405060

110

100

Outdoor Temperature

Water Temperature

70 405060

150

140

130

120

1:4

With a 0° Offset, the

ratio curves begin at

100° Water Temperature.

With a -20° Offset,the

ratio curves begin at

80° Water Temperature.

With a +20° Offset,the

ratio curves begin at

120° Water Temperature.

1:4

1:4 1:1

1:1

4:1

100

+20 Offset

-20 Offset

Outdoor Temperature (in °F)

70 60 50 40 20

30 0 -10

10 -20

100

120

110

130

140

150

160

180

170

190

200

210

220

1:3 1:2 1:1.5

1:1.25

1:1

1.25:1

1.5:1

2:1

3:1

4:1

Water Temperature (in °F)

Reset Ratio Curves

Reset Ratio is Presented as

Outdoor Temp. : Water Temp. Ratio

1:4

WARNING

When controlling a non condensing

boiler directly without the use of a

mixing valve, minimum boiler water

temperature must be set to boiler

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case, system temperature must not go

below such temperature.

BSC Installation and Operation Manual

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FRQGXFWRUVKLHOGHGFDEOH



HQRUHTX

HQW











'RQRWJURXQ

W

HV

DWW

HVHQVRU

XWDW

e contro

e BSC Out

oor Sensor term

mar

an “O”

(

A12



RQRWUXQVHQVRUZLUHVLQFRQGXLWZLWKOLQHYROWD

HZLULQ

J

ERT

Determinin

the proper location for the Outdoor Sensor is

ery important. The BSC will base the heat on the outdoo

emperature in

ormation it receives

rom this location. I

the

ensor

n t

e sun, or covere

ce,

ts rea

ill

ifferent from the actual Outdoor temperature (OD)

Mounting Holes

MADE IN U.S.A.

SAFETY

GROUND

MUST BE

CONNECTED

LINE

NEUTRAL

Earth

Ground

120VAC

Outdoor

Sensor

snap-in

location

Shield

not connected

Conduit

Outdoor Label

on back of Sens

Outdoor Sensor

Mounting

screws

location

Seal around

sensor and wall

Outdoor

drip-hole

OUTDOOR

TEMP

A11

A12

SHIELD

OUTDOOR SENSOR

BSC Installation and Operation Manual

WIRING THE SYSTEM SENSOR

For proper operation, the BSC must be connected to a temperature or pressure sensor located in the common header.

SYSTEM TEMPERATURE

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IRULQVHUWLRQLQD,'ZHOO

 /RFDWHWKHVHQVRULQWKHFRPPRQKHDGHUZKHUHLWZLOOUHJLVWHUWKHRXWSXWRIDOOWKH

stages before any takeoffs. If the sensor cannot read the output of all the stages, it will not be able to control the system properly.

 7KHVHQVRUZLUHVFDQEHH[WHQGHGXSWR¶E\VSOLFLQJZLWKFRQGXFWRUVKLHOGHGFDEOH%HOGHQRUHTXLYDOHQW

 'RQRWUXQVHQVRUZLUHLQFRQGXLWZLWKOLQHYROWDJH

 7HPSHUDWXUHVHQVRUVKDYHQRSRODULW\&RQQHFWWKHZLUHVIURPWKHVHQVRUWRWKH%6&WHUPLQDOVPDUNHGTEMP- A1, A2.

 &RQQHFWWKHVKLHOGWRWKHFLUFOHGWHUPLQDOTEMP-A2 with one of the sensor wires.

 &XWWKHVKLHOGZLUHDWWKHVHQVRUHQG

SYSTEM PRESSURE

 7KH%6&LVGHVLJQHGWREHFRQQHFWHGWRD36,SUHVVXUHWUDQVGXFHU

+RZHYHULWFDQEHXVHGZLWKDYDULHW\RIP$WUDQVGXFHUV

See Sensor Type selection on page 13.

 /RFDWHWKHVHQVRURQWKHPDLQVXSSO\KHDGHUZKHUHLWZLOOUHJLVWHUWKHRXWSXW

of all the stages. If the sensor can not read the output of all the stages, it will

not be able to control the stages properly.

 $WWDFKDóLVRODWLRQWXEHSLJWDLOWRWKHKHDGHU

 6FUHZWKHSUHVVXUHVHQVRUWRWKHSLJWDLO7KHVHQVRUKDVó137IHPDOHWKUHDGV

 3UHVVXUHVHQVRUZLUHVFDQEHH[WHQGHGXSWRE\VSOLFLQJZLWKJDXJHVKLHOGHGZLUH

 'RQRWUXQVHQVRUZLUHLQFRQGXLWZLWKOLQHYROWDJH

 35(6685(6(16256+$9(32/$5,7<&XWWKH*UHHQZLUH:KLWHZLUHDQGWKHFOHDUWXEH2QO\WKH5HGDQG%ODFNZLUHV

should be connected.

 &RQQHFWWKH5HGZLUHIURPWKHSUHVVXUHWUDQVGXFHUWRWHUPLQDO35(66$

 &RQQHFWWKH%ODFNZLUHIURPWKHSUHVVXUHWUDQVGXFHUWRWHUPLQDO35(66$6

WIRING AN EXTERNAL SET POINT (4-20MA INPUT)

 7KH%6&FDQXWLOL]HDQH[WHUQDOVHWSRLQWDVDP$VLJQDOIURPDQ(QHUJ\0DQDJHPHQW

System (EMS) or any other signal source.

 $V\VWHPVHQVRUPXVWEHLQVWDOOHGDVGHVFULEHGLQWKHSUHYLRXVVHFWLRQ

 7KH([WHUQDO6HW3RLQWPXVWEHVHWXSFRUUHFWO\6HH(06,QSXW0RGHDQG([WHUQDO6HW

Point in the Startup menu on page 13). These settings will allow the BSC to read the

4-20mA input signal and adjust the set point based on its external set point setting.

 7KH%6&FDQVRXUFHWKHFXUUHQWIRUWKHP$LQSXW,WSURYLGHVDQH[FLWDWLRQYROWDJHRI

9'&,IXVLQJWKH%6&WRVRXUFHWKHFXUUHQWDWWDFKWKHVLGHRIWKHP$LQSXWWRWKH

BSC EMS terminal marked +. Attach the (-) side of the 4-20mA signal to the EMS terminal

marked SIGNAL.

 ,IWKH(06VRXUFHVWKHFXUUHQWSURYLGHVWKHH[FLWDWLRQYROWDJHDWWDFKWKHVLGHRIWKH

4-20mA input to the BSC EMS terminal marked SIGNAL. Attach the (-) side of the 4-20mA

input to the EMS terminal marked SHIELD.

WIRING THE SHUTDOWN

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 $W\SLFDOXVHIRUWKLVIHDWXUHZRXOGEHWRWXUQRIIDOOERLOHUVWDJHVZKHQDQ(06SDQHOQRORQJHUUHTXLUHVKHDWLQWKHV\VWHP

 :KHQWKH6KXWGRZQIHDWXUHLVHQDEOHGE\FORVLQJDGU\FRQWDFWDOODFWLYHVWDJHVZLOOLPPHGLDWHO\PRGXODWHGRZQWRORZ7KH\ZLOO

remain in low for the Soft-Off period (See Soft-Off Delay on page 27) and then, turn off.

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over, then it will also turn off.

 7KH6KXWGRZQVLJQDOPXVWEHDGU\FRQWDFWRQO\1RYROWDJHFDQEHSODFHGDFURVVWKH

SHUTDOWN terminals.

 %ULQJWKHWZRZLUHVIURPWKHGU\FRQWDFWWRWKHWHUPLQDOVPDUNHGSHUTDOWN- A3,A4.

A3 SHUTDOWN

SYSTEM

TEMP

SHIELD

SYSTEM SENSOR

Current Modulation Outputs in series with

EMS Sourcing Current

EMS INPUT

EMS

Input

+SIGNALSHIELD (+)

(-)

EMS INPUT

BSC Sources Current

24VDC Excitation Voltage

EMS

Input

+SIGNALSHIELD (+)

(-)

A8 NETWORK

PRESS

4-20mA

SHUTDOWN

BLACK

Transducer

4-20mA

RED

A4 SHUTDOWN

SYSTEM

TEMP

TShutdown Sign

Dry Contact

BSC Installation and Operation Manual

WIRING THE SYSTEM PROVE

 7KH6\VWHP3URYHIHDWXUHLVSURYLGHGWRFKHFNWKHV\VWHPFRPSRQHQWRSHUDWLRQVWDWXV

 $W\SLFDOXVHRIWKLVIHDWXUHLVWRFKHFNIRUZDWHUÀRZEHIRUH¿ULQJDQ\ERLOHUVWDJHV:KHQ

there is a call for heat, the System Output relay activates the system pump. When the pump

HVWDEOLVKHVÀRZDÀRZVZLWFKFORVHVWKHSYSTEM PROVE input terminals. Only then, can the

BSC activate and modulate the boilers as required to hold the set point.

 ,IWKHSYSTEM PROVE input is open on a call, the BSC will enable only the System Output. All Stage outputs will be off when the

SYSTEM PROVE input is open.

 $IDFWRU\LQVWDOOHGMXPSHUSURYLGHVWKH6\VWHP3URYHVLJQDO'RQRWUHPRYHWKHMXPSHUXQOHVVLWZLOOEHUHSODFHGE\D3URYHVLJQDO

 7KH6\VWHP3URYHVLJQDOPXVWEHDGU\FRQWDFWRQO\1RYROWDJHFDQEHSODFHGDFURVVWKHSYSTEM PROVE terminals.

 %ULQJWKHWZRZLUHVIURPWKHGU\FRQWDFWWRWKHWHUPLQDOVPDUNHGSYSTEM PROVE - A9,A10.

WARNING

Do not remove the factory installed System Prove jumper unless it is replaced by a System Prove signal. If the

SYSTEM PROVE input is not closed/shorted, the BSC will NOT activate the stages.

The SYSTEM PROVELQSXWFDQQRWEHXVHGDVDVDIHW\OLPLW$OOHTXLSPHQWPXVWKDYHLWVRZQFHUWL¿HGOLPLWDQG

safety controls as required by code.

WIRING THE LOCKOUT INPUTS

 7KH%6&ZLOOQRWDFWLYDWHRUPRGXODWHDQ\6WDJHLQ/RFNRXW$FORVXUH

across the pair of LOCKOUT INPUT terminals informs the BSC that the boiler stages have

encountered a safety limit and cannot be restarted.

 7KH/RFNRXWVLJQDOLVQRWDVDIHW\IHDWXUH+RZHYHUXVHRIWKH/RFNRXWZLOOGUDVWLFDOO\

LPSURYHWKH%6&VVHWSRLQWFRQWUROSHUIRUPDQFHLQWKHHYHQWRIDVWDJHJRLQJLQWRORFNRXW

when encountering a safety limit.

 $SDLURILOCKOUT INPUT terminals is provided for each stage.

 7KH/RFNRXWVLJQDOPXVWEHDGU\FRQWDFWFORVXUHIURPWKHERLOHUEHLQJFRQWUROOHGE\WKDW

VWDJHVPRGXODWLQJRXWSXW1RYROWDJHFDQEHSODFHGDFURVVWKHWHUPLQDOV

 :LUHWKH/RFNRXWVLJQDOVWRWKHLUUHVSHFWLYHSTAGE terminals.

WARNING

The LOCKOUT INPUTS cannot be used as safety limits. All equipment must

KDYHLWVRZQFHUWL¿HGOLPLWDQGVDIHW\FRQWUROVDVUHTXLUHGE\FRGH

WIRING A SETBACK

 7RXVHWKH6HWEDFNWKH(06,QSXWPRGHPXVWEHVHWWR6HWEDFN6HHSDJH13.

 7KH6HWEDFNIHDWXUHFDQEHXVHGWRVZLWFKWKH%6&WRDORZHU6HW3RLQWZKHQOHVVORDGLVUHTXLUHGGXULQJWKH

night or on the weekends when a building is unoccupied, but a minimum level of heat is still required.

 7KH6HWEDFNIHDWXUHFDQQRWEHXVHGZLWK([WHUQDO6HW3RLQWP$(06LQSXWRU5HVHWRSHUDWLRQ

 7KH6HWEDFNVLJQDOLVZLUHGLQWRWKHEMS terminals (+) and (SIGNAL).

 7KH6HWEDFNVLJQDOPXVWEHDGU\FRQWDFWRQO\1RYROWDJHFDQEHSODFHGDFURVVWKHEMS (+) and SIGNAL terminals.

 :KHQWKHSetback terminals are shorted, the Setback is enabled and the BSC will hold the lower Set Point. The lower Set Point will

DSSHDURQWKHPDLQGLVSOD\LQGLFDWLQJWKLVFRQGLWLRQStb= 150F

 :KHQWKHVKRUWLVUHPRYHGWKH%6&ZLOOUHYHUWWRWKHKLJKHUVDYHG6HW3RLQW

ALERT

The Setback is not equivalent to the 4-20mA input, even though both wire into the

EMS terminals. The 4-20mA input requires 4-20mA source that changes the Set

Point in one degree increments. The Setback provides lower Set Point.

STAGE

LOCKOUT

INPUTS

STAGE

B Lockout Signal

Dry Contact

EMS INPUT

+SIGNAL

SHIELD

Dry Contact

Setback Signa

OUTDOOR

TEMP

SYSTEM

PROVE

A10

A11

NETWORK

Prove Signal

Dry Contact

BSC Installation and Operation Manual

OUTPUT WIRING

WIRING THE SYSTEM OUTPUT

System Output Operation in Set Point Mode

 7KH 6\VWHPUHOD\ZLOOHQHUJL]HZKHQHYHUWKHUHLVDFDOOIRURXWSXWDQGWKH6KXWGRZQIHDWXUHLVQRWDFWLYH

 8QWLOWKHSYSTEM PROVE input is shorted no Stages will be activated. If a Prove is not required, the factory-

installed jumper should remain connected.

 7KH6\VWHPZLOOUHPDLQHQHUJL]HGZKLOHDQ\6WDJHLVDFWLYH

 :KHQWKHODVW6WDJHUHOD\WXUQVRIIDQGLIWKH2XWGRRU&XWRIIZDVVHWNORUWKHRXWGRRUVHQVRUZDVQRW

LQVWDOOHGWKH6\VWHPRXWSXWFDQUHPDLQHQHUJL]HGIRUWKHSHULRGVHWE\WKH6\VWHP5XQ2Q

 $W\SLFDOXVHRIWKH6\VWHPRXWSXWLVWRDFWLYDWHDV\VWHPSXPSVWDUWHU7KHSXPSFDQUXQZKHQHYHUWKHUHLVDFDOO

IRUKHDW+RZHYHUZKHQKHDWLVQRORQJHUUHTXLUHGWKHSXPSZLOOVWD\DFWLYHIRU5XQ2Q'HOD\WRUHPRYHWKH

residual heat from the boilers.

 )RUWKH6\VWHPRXWSXWWRIXQFWLRQDUHOD\PXVWEHLQVWDOOHG7KHUHOD\LVFDSDEOHRIVZLWFKLQJ$SLORWGXW\DW

9$&DSSUR[LPDWHO\ѿ+3

System Output Operation in Reset Mode

 7KH 6\VWHPRXWSXWUHOD\ZLOOHQHUJL]HZKHQHYHUWKHRXWGRRUWHPSHUDWXUHLVEHORZWKH2XWGRRU&XWRII

 7KH6\VWHPZLOOUHPDLQFRQVWDQWO\HQHUJL]HGZKLOHWKHRXWGRRUWHPSHUDWXUHLVEHORZWKH2XWGRRU&XWRII

 :KHQWKHRXWGRRUWHPSHUDWXUHULVHV)DERYHWKH2XWGRRU&XWRIIWKH6\VWHPRXWSXWZLOOUHPDLQHQHUJL]HGIRUWKH6\VWHP5XQ2Q

and then, turn off.

Wiring the System Output

 7KH6\VWHPRXWSXWKDVRQH1RUPDOO\2SHQ12GU\FRQWDFWUHOD\,WGRHVQRWVRXUFHDQ\SRZHU

 &ODVVYROWDJHZLULQJPXVWHQWHUWKHHQFORVXUHWKURXJKDGLIIHUHQWNQRFNRXWIURPDQ\&ODVVYROWDJHZLULQJ

 (DFK12FRQWDFWLVFDSDEOHRIVZLWFKLQJ$SLORWGXW\DW9$&DSSUR[LPDWHO\ѿ+3

WIRING THE STAGE OUTPUTS

 (DFKVWDJHKDVDQRSHUDWLQJOLPLWUHOD\RXWSXWLQDGGLWLRQWRWKHPRGXODWLRQRXWSXW7KH

operating limit output can be used when a boiler requires an activation signal through its limits.

+RZHYHUVRPHQHZHUERLOHUVXWLOL]HWKHPRGXODWLRQVLJQDOWRPDQDJHWKLVIXQFWLRQ,QWKLV

case operating limit outputs are not used.

Installing the Operating Limit Output Relays

 (DFKRSHUDWLQJOLPLWRXWSXWVWDJHAthrough D) that is to be used must have a relay installed in

the socket for the limit output to function.

 7RLQVWDOODUHOD\RULHQWWKHSLQVWRPDWFKWKHVRFNHWDQGWKHQSUHVVLWJHQWO\LQWRWKH

appropriate socket.

Wiring the Stage Outputs

 (DFK6WDJHRXWSXWAthrough D) has one Normally Open (N.O.) relay contact.

 7KH12FRQWDFWVDUHGU\FRQWDFWVRQO\7KH\GRQRWVRXUFHDQ\YROWDJH

 (DFK12FRQWDFWLVFDSDEOHRIVZLWFKLQJ$SLORWGXW\DW9$&

 :LUHWKH12UHOD\FRQWDFWVLQVHULHVZLWKWKHXQLW¶VOLPLWFLUFXLW

 &ODVVYROWDJHZLULQJPXVWHQWHUWKHHQFORVXUHWKURXJKDGLIIHUHQWNQRFNRXWIURPDQ\

Class 2 voltage wiring.

WIRING TO 135:MODULATING MOTORS

 7KH%6&FDQEHHTXLSSHGWRRSHUDWHXSWRIRXU:modulating motors (BSC

ordered with 135 Ohm Output boards.) See Modulating Output Cards on page 10.

 7HUPLQDOV&&&DQG&RQWKH%6&PXVWEHFRQQHFWHGWRWKHPRGXODWLRQ

decreasing terminals on the burners (Blue/Black modulating wires).

 7HUPLQDOV&&&DQG&RQWKH%6&PXVWEHFRQQHFWHGWRWKHPRGXODWLRQ

increasing on the burners (White modulating wires).

 7HUPLQDOV&&&DQG&RQWKH%6&PXVWEHFRQQHFWHGWRWKHPRGXODWLRQ

common terminals on the burners (Red modulating wires).

SYS

SYSTEM

Pump

ACDB

AOPERATING LIMIT

OUTPUTS

CDB

56789 1110 12

Limit Circuit

Typical for Each Stage

ABCD

C10

C11

C12

BRW

135 Ohm

Motor

BRW

135 Ohm

Motor

BRW

135 Ohm

Motor

BRW

135 Ohm

Motor

135 Ohm Modulation Outputs

BSC Installation and Operation Manual

WIRIN

LATI



7KH%6&FDQEHHTXLSSHGWRRSHUDWHXSWRIRXUP$PRGXODWLQ

PRWRUV%6&

UGHUHGDV&9&XUUHQW9ROWD

H6HH0RGXODWLQ

2XWSXW&DUGVRQWKLVSD





7RSUR

UDPW

HFRQWUR

IRUP$RXWSXWVHH2XWSXW7

SHRQSD





\W

HVXSS



PDU

&XUUHQW



WDJH

RZW

HPR

QJWHUP

V



7KH%6&VRXUFHV9'&H[FLWDWLRQYROWDJHIRUWKHP$VLJQDO



7HUPLQDOV&&&DQG&RQWKH%6&PXVWEHFRQQHFWHGWRWKHPRGXODWLRQ

6LJ









WHUP

VRQW

H

XUQHUV





7HUP

V&



&



&



DQ

&RQW

H%6&PXVW

HFRQQHFWH

WRW

HPR

ommon terminals on the burners



QVRPHLQVWDOODWLRQZKHUHWKHERLOHUVGRQRWUH

XLUHDVH

DUDWHDFWLYDWLRQRXW

XW

QDOLWPL

KWEHEHQH¿FLDOWRXWLOL]HWKHOLPLWRXWSXWUHOD

WRPDNHRUEUHDNWKH

urrent signal. In this case, wire the current signal as indicated in the diagram

IRIN

OLT

DULATI

TORS



H%6&FDQ

HHTX

SSH

WRRSHUDWHXSWRIRXU999RU9

QJPRWRUV



%6&RU

HUH

DV&



9



&XUUHQW9R

WDJH









SSO\WKHVXSSOLHGODEHOPDUNHG&XUUHQW9ROWDJHEHORZWKHPRGXODWLQJWHUPLQDOV



7RVHOHFWWKHUDQ

H999RU9VHH2XWSXW7

SHRQSD





7HUP

V&&&DQ

&RQW

H%6&PXVW

HFRQQHFWH

WRW

HPR

roun

term

s on t

urners



7HUPLQDOV&&&DQG&RQWKH%6&PXVWEHFRQQHFWHGWRWKHPRGXODWLRQ9ROWDJH9WHUPLQDOVRQWKHEXUQHUV



QVRPHLQVWDOODWLRQZKHUHWKHERLOHUVGRQRWUHTXLUHDVHSDUDWHDFWLYDWLRQRXWSXWVL

QDOLWPL

KWEHEHQH¿FLDOWRXWLOL]HWKHOLPLW

utput re

ay to ma

e or

rea

e vo

tage s

gna

. In t

s case, w

re t

e vo

tage s

gna

cate

n t

agram on t

e r

DULATI

UTPUT

ARD



(YHU\WZRPRGXODWLQJERLOHURXWSXWVDUHFRQWUROOHGE\RQH0RGXODWLQJ2XWSXW

Card. A and B are controlled b

the same Modulatin

Output Card while C an

are contro

fferent Mo

Output Car



HFDU

VDUH

QVWD

RQW

H

RIW

H%6&PD

Q

RDU

G



7KHUHDUHWZRW\SHVRIFDUGVDYDLODEOH











Cards Operates two 135 Ohm modulatin

motors

&XUUHQW9ROWD

H&DUGVRSHUDWHVP$999RU



PRWRUV<RXFDQVH

HFWRQ

RQHRXWSXWV

SHUFDU





H%6&FRPHVZ



WV0R

QJ2XWSXWFDU

V

QVWD

+RZHYHU





rdering an Extension panel, you must add the Modulating Output Cards neede

s t

o not come w

e Extens

NET

NICATI

IRIN



H%6&FRQWUR

FRPHVH

HUDVD6WDQ

Z

RXWDQ

FRPPXQ

FDW

RQRUZ

net commun

cat



Q\%6&ZLWK%$&QHWFRPPXQLFDWLRQFRQWUROSDFNDJHKDVD%$&QH



ommunication Board installed on the back of the B

main board



&RQQHFWW

H%$&QHW&$7(W

HUQHWFD

HFRP

IURPW

HQHWZRU

WRW

H

ACnet RJ45 Commun

cat

on soc

et on t

e BSC commun

cat

oar



HWWKH%6&%$&QHW1HWZRUN6HWWLQ

VDVGHVFULEHGRQSD

H28.

ABCD

C10

C11

C12

4-20mA

Motor

4-20mA

Motor

4-20mA

Motor

4-20mA

Motor

Common

4-20 mA Modulation Outputs

ABCD

C10

C11

C12

0-5 V or

0-10 V

Motor

V+

GND

V+

GND

V+

GND

V+

GND

Voltage Modulation Outputs

0-5 V or

0-10 V

Motor

0-5 V or

0-10 V

Motor

0-5 V or

0-10 V

Motor

Modulating Output Cards onBack of Control

Fuse

Battery

Softwa

Chip

Modulating

Output Cards

Motherboard

CPU

Board

BACnet or

Ethernet

Communication

Board

DO NOT USE

THIS RS485

Connect to

BACnet Cat-5

Cable

Connect to

RS485 on

Extension Panel

BACnet Communiation

Connection to Back of Control

Motherboard

CPU

Board

BACnet or

Ethernet

Communication

Board

Connect BACnet

Cat-5 cable to

RJ45 socket

BACnet Network

BACnet HUB

or Switch

Control

Stage

A & B

Control

Stage

C & D

AOPERATING LIMIT

OUTPUTS

CDB

456789 1110 12

V+

GND

Voltage Modulation Outputs in series with Limits

0-5 V or

0-10 V

Motor

AOPERATING LIMIT

OUTPUTS

CDB

456789 1110 12

urrent Modulation Outputs in series with Limits

Com

4-20mA

Motor

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