Keston boilers deliver two temperatures at the same time

Published:  16 January, 2005

Boiler rig
110 kW condensing boilers from Keston can be installed in a wall-hung rig and provide two different flow temperatures.

Two ranges of wall-hung modulating gas-fired condensing condensing boilers from Keston have two pairs of flow and return tappings for separate connection to heating and DHW circuits. They can deliver two different flow temperatures at the same time to serve, for example, a fast-recovery indirect cylinder and underfloor heating.

The C90 range covers outputs from 22 to 90 kW and the C110 range covers 28 to 110 kW. For large commercial applications, these boilers can be supplied in a bespoke prefabricated plant rig.

High-efficiency stainless-steel heat exchangers are combined with low-emission burners in a compact cabinet. The heat exchangers are highly resistant to corrosion and their corrugated pipes provide a massive surface area in a compact space.

Integral pumps are automatically controlled to match water flow to heat output. There is also an integral pump-exercise function. Integral flue check valves prevent reverse circulation of combustion products, and there is also a frost-protection thermostat.

Optional accessories include an external control interface that can directly drive the boilers from a 0 to 10 V signal and an outside sensor connection for an outdoor sensor.

The 100 mm plastic flue system can be up to 30 m long, both horizontally or vertically.



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