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Application.The VT117 radiator thermostat, which has full CEN Standard approval to EN215, regulates individual radiator output in wetcentral heating systems. Radiator thermostats are particularly useful in taking advantage of uncontrolled heat gains (e.g. solargain; open fire in a living room).
Because the valve body design is not sensitive to water flow direction and its radiator tail and copper tube connections areinterchangeable, the VT117 radiator thermostat can be mounted vertically or horizontally at either end of the radiator without water hammer occurring.
The VT117 should not be fitted to a radiator in a room where there is a room thermostat. Suitable for two pipe systems only.
Installation.The tailpiece has a 16mm square section to enable a spanner to be used to tighten the tailpiece into the radiator. The VT117E should not be installed where it is likely to be subjected to direct sunlight.