Honeywell VT117E Reference Manual

THERMOSTATIC RADIATOR VALVE
VT117
FEATURES
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Bi-directional valve body
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Wax sensor provides consistent
and reliable performance
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Sensor head may be mounted vertically
or horizontally by interchanging radiator
tail and copper tube fittings
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Integral balancing adjustment.
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Energy saving button alerts user to
economical setting for comfort
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6mm play on radiator tailpiece to allow
for variation in radiator distance from
valve
OPTIONS
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15, 10 and 8mm angled versions
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15mm straight version
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Range stops available separately
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VT117 heads interchangeable with
CM Zone HR80 heads
© Honeywell Control Products and Systems, Issue 10
APPLICATION
The VT117 Radiator Thermostat senses the air temperature
around it and can limit room temperature by regulating individual
radiator output in wet central heating systems. Radiator
thermostats are particularly useful in taking advantage of
uncontrolled heat gains (e.g. solar gain or an open fire in a
living room).
According to Building Regulations Part L1 radiator thermostats
should be fitted "on all radiators except in rooms with a room
thermostat" to satisfy either Minimum or Best Practice
installations. The valve can be mounted vertically or horizontally
at either end of a radiator.
To work correctly, the VT117 should be installed to a two pipe
heating system and also have a free flow of air around the head
to sense temperature.
5.11