Weil-McLain BCP-8X - Manual (Page 4)

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The BCP-8S is the perfect control whenever multiple boilers are required for steam heating applications. The BCP-8S controls the stages
to maintain a precise system set point.
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The BCP-8S’s control PID algorithm allows it to look at the rate of change in the system. If the system oscillation is minimal, the BCP-
8S will make slow and gradual output adjustments. If the load is changing quickly, the BCP-8S can be set to OSS sequencing where it
will react based on load changes.
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set point.
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The BCP-8S’s alphanumeric digital display names each system parameter in simple English and shows its precise value. The easy to
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commands.
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Rotating the lead stage on a call for output promotes even wear on each boiler. The BCP-8S has three modes of rotation: Manual, FOFO
(First-On/First-Off), or Time. The Time option rotates the lead stage every selected period, from every hour to every 41 days.
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in standby mode will remove it from the rotation sequence. In this mode, the boiler will be used as a backup in large demand periods
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These outputs work with the control logic to operate system and a combustion air damper relays. In addition, a System PROVE input
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one of the same boiler. That will be repeated for each of the lag boilers.
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that the operation of the higher stages turn off the lower operating stages. This can be achieved by selecting 'Single' from the Startup
Staging menu.
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As a stand-alone, the BCP-8S is designed to control eight stages. However, it has the capability of expanding its control to two BCP-8X
extension panels each with eight stages. Thus, the BCP-8S can control a total of up to 24 stages.
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Regardless of the type of applications, Setback is an energy saving feature. The BCP-8S offers a built-in day/night schedule for the
setback period. On the other hand, if external scheduling is to be used, the Setback can be activated using an external signal by shorting
the SETBACK input terminals.