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12.0 Cascade
If more boilers are installed at the same installation, it is very handy to let the cascade software start and
stop the boilers, to so the output fit with the needs.
One boiler starts as Master, and the rest as Slave, the Master start the Slave if the load on the Master have
been over the limit for a specified time. If the load still is over the limit after the specified time, the
Master will start the next Slave.
If the load is dropping, the upper side will happen, the Master will stop the Slaves.
To be sure that the Master not run for full load all the time, the Master boiler move the Master role, to the
next boiler after the specified running hours as Master.
There is no limit for how many boilers the Cascade software can control, and other brand of Biomass, Oil
or Gas boilers can be controlled as well.
If the Master faults and goes into alarm mode, it sends the Master role to the Slave in the chain.
If all Slaves are activated, the Master will activate the Oil or Gas boiler, if one of those is a part of the
chain.
The boilers in the Cascade chain, with PCT400 controller, communicate by LAN, and each boiler needs a
IP address and Port no.
Other brand of Biomass, Oil or Gas boiler, we name as” Helper”, and are controlled by a potential free
relay.
12.1 Cascade Setup.
To get the Cascade running, some parameter has to be set, all this parameter are in the menu below, and
an explanation will follow in the next chapters.
Menu / Heating system / Cascade