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User Manual - Page 22

For BOILER SEQUENCING CONTROL.

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22
BSC Installation and Operation Manual
AVOID CONFLICTING BOILER LIMITS
WARNING
The limits set on the boilers MUST be set considerably higher than the BSC's Set Point for the reasons detailed below:
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header will be lower than that registered by sensors in the boilers.
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Hold setting must be accounted for. The boiler limit must be set above the Set Point PLUS the Last-Stage-Hold PLUS the normal
temperature drop experienced in the piping.
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prevent the boilers' internal limits from being reached.
SET POINT AND DEFAULT TABLE
SENSOR
SET POINT SETBACK LAST-STAGE-HOLD THROTTLE TRIM (Default=0)
MIN MAX DEFAULT MIN MAX DEFAULT MIN MAX DEFAULT MIN MAX DEFAULT MIN MAX
°F 702501400750 0300 2202-5+5
°C 21121600420 0170 1111
15 PSI 0155050031.50.25 3 0.5 -1.0 +1.0
30 PSI 030801000630.561-1.0 +1.0
100 PSI 0100300300 020101202 -5+5
200 PSI 0200600600 040202404 -5+5
300 PSI 0300800900 060303606 -5+5
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