BOILER SEQUENCING CONTROL User Manual

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BSC Installation and Operation Manual

MANUAL

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TIME

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Note: If you do not set the system time, the BSC will assume it was installed at 2 PM.

LAST ON

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PURGE DELAY

Adjustable from 0.0 to 10.0 minutes Default: 1.0

SELECT: MENU/System Settings/Purge Delay

(Not Available in Process)

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line and can begin generating heat.

---- PURGE DELAY ----

1.0min

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to fully come on line and to begin producing output. Once the Purge Delay is over, the BSC can begin adjusting its modulation.

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Purge Delay period.

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LAG DELAY

Adjustable from 0 to 60 minutes Default: 0.0min

SELECT: MENU/System Settings/Lag Delay

(Not Available in Process)

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the load.

---- LAG DELAY ----

0min

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activated. For example, if the Lag Delay was set to 10 minutes, the Lead Stage would need to remain at 100% modulation for a full

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conditions become extreme.

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regardless of Modulation Start % setting, the lead stage must reach 100% and stay there before the lag Stage can be activated.

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to 0 min if you want smooth set point control of multiple units.

STANDBY TIME

Adjustable from 0 to 60 minutes Default: 10 minutes

SELECT: MENU/System Settings/Standby Time

(Not Available in Process)

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100% modulation for the full Standby Time.

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never be a Lead Stage

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temperature/pressure. Therefore, shorter Standby Times will result in smoother set

point operation in extreme conditions. Longer Standby times may prevent a Standby

boiler from starting if the other boilers can eventually meet the load or if the load

decreases.

---- STANDBY TIME ----

10min

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User Manual - Page 20