Flue-gas outlet, combustion-air inlet, flow and return connections and gas connections are all on top of the boiler, with a condensate connection at low level on the right. All electrical and electronic components are contained within the instrument panel mounted on top of the boiler. These boilers are suitable for room-sealed or open-flue applications.

The standard control package allows actual and set values to be read and adjusted on the built-in display, which also provides normal operating and fault-code indications.

The control system can react to external negative influences in the rest of the system to maintain output for as long as possible without locking out. At worst, the boiler will reduce its output or shut down until the negative conditions return to normal before it restarts.

These boiler can be used on new and refurbishment projects in single and cascade configurations.

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