Controls installed without damage to building fabric or decorations, cable holes or visible wiring.“No damage to historic decorations, no cable holes and no visible wiring,” insisted the owners of a stately home in Devon, when specifying controls for a new heating system in their family living areas.  The simple solution was Honeywell CM60RF wireless programmable thermostats, which use safe low power radio signals back to their boiler units.  Each CM60RF combines comfort with energy efficiency by adjusting temperatures within each heating zone precisely and automatically to the household’s needs at different times of the day.Honeywell wireless controls were recommended by The Stove Shop, of Liskeard, Cornwall, which designed and installed the new heating system.  The controls were installed in a small fraction of the time required by conventional “wired” controls, particularly bearing in mind the vastness of the Victorian mansion, the thicknesses of its interiors walls and the long distances up to the system’s two boilers, which are installed with heating manifolds, control valves and a specially designed wiring centre in former servants’ quarters on the top floor.The heating system has five zones: four for space heating, one for domestic hot water.  One space heating zone can provide 113,000 Btu of heating, two of 76,000 Btu and one of 15,000 Btu, while the domestic hot water zone can deliver 20,000 Btu.  Each zone is fed via a Honeywell motorised valve from a common manifold, served by two 150,000 Btu Worcester oil-fired boilers operating in parallel, each via a Grundfos pump.  The first boiler to fire alternates automatically between the two, to even out wear, and is supplemented by the second boiler when necessary.  The Stove Shop designed and built a special wiring centre to control the boilers, valves and pumps in response to heat demand signals from the Honeywell CM60RF programmable thermostats and a Honeywell hot water cylinder thermostat.  Data from additional thermostats mounted within the system’s two return manifolds is used by to control boiler and pump switch-off and to close a motorised valve in each boiler return after a pump over-run period. The home owners are delighted with the comfort and reliability of the heating system and also with the Honeywell CM60RF thermostats which, they say, are very easy and convenient to use and, being wireless, can be wall-mounted or placed on a table.

Email: HVACProductsUK@honeywell.com