The enhanced Modulex line of condensing boilers can now support projects with higher working pressure up to 92 psig. The 300,000- to 1 million-Btuh boilers also are now equipped with a larger, 2-1/2-inch National Pipe Thread water inlet/outlet connection, resulting in a lower pressure drop across the boiler. Each boiler combines between two and seven independent, 151,500-Btuh, pre-assembled thermal modules housed in a common enclosure. Each module has its own dedicated controller with a combustion safeguard, variable-speed fan, modulating gas valve, electronic ignition, modulating burner, flow temperature sensor, thermostat, and heat exchanger. Each unit is equipped with a boiler communications module (BCM) that supports full interoperability to building automation systems via Modbus protocol, making remote communications and control possible. In the event the boiler’s master controller stops working, the BCM takes over operations of the boiler. The boilers are available in six different sizes with modulating capabilities from 6:1 to 23:1, depending on the unit.
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