BOILER SEQUENCING CONTROL User Manual

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BSC Installation and Operation Manual

4 & 20MA SET POINTS

4mA Adjustable from 70ºF/21ºC to 200ºF/93ºC Default: 140ºF/ 60ºC

20mA Adjustable from 90ºF/32ºC to 240ºF/116ºC Default: 200ºF/ 93ºC

SELECT: MENU/<System Startup>/..../Sensor Type/EMS Input Mode/EMS 4mA SP

(Available In EMS Control Only)

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EMS 4mA SETPOINT

140

[

]

EMS 20mA SETPOINT

200

[

]

OUTPUT TYPE

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SELECT: MENU/<System Startup>/..../Output Type A&B

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controls two boilers (A & B) or (C & D). The Output Cards normally come pre-

installed on the back of the control main board of the BSC. See Output Cards on

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purchase and install its Output Cards separately.

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selected by the control.

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if the corresponding Output Card is installed.

-OUTPUT TYPE A&B-

Not Installed

135ohm

0-10v

0-5v

2-10v

1-5v

4-20ma

ALERT

Connect the extension panels,

if needed for additional stages,

prior to setting the Output Type.

As the BSC will only show the

output stages it can detect.

4-20MA, 0-5V, 0-10V, 1-5V, OR 2-10V OUTPUTS

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 6HOHFWWKHDSSURSULDWH2XWSXW7\SHIRUVWDJHVA & B. The BSC will then automatically bring up the screen for stages C & D.

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MODULATING MODE

Normal, Parallel Default: Normal

SELECT: MENU/<System Startup>/..../Output Type C&D/Modulating Mode

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units, it is advantageous to run one unit at high modulation than several units at lower

modulation. If the units used are of this type, select Normal. This is the recommended

setting for typical steel and cast iron boilers or boilers with low turndown ratios.

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Parallel. This is typically used on water-tube boilers, low mass boilers, or burners with

high turndown ratios.

-MODULATING MODE -

Normal

Parallel

OPERATING MODE

Normal, Process Default: Normal

SELECT: MENU/<System Startup>/..../Modulating Mode/Operating Mode

(Available with Normal Modulating Mode Only)

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systems, it is best to adjust the modulation based on the rate of system rise or fall. This

PID type of algorithm will help prevent short cycling of the stages, reduce thermal

shock, and maintain an accurate system temperature/pressure. If your equipment is of

this type, select Normal.

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instantaneously. In Process mode, the BSC will react immediately to load changes.

Large load changes may cause stages to be short cycled, as the BSC can enable and

disable stages within seconds.

-OPERATING MODE -

Normal

Process

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User Manual - Page 16