Honeywell VT117E, VT117EPFE, VT117, VT117EPFD, VT117D Reference Manual
5.11
NON-ELECTRIC CONTROLS
VT117
THERMOSTATIC RADIATOR VALVE
FEATURES
■
Bi-directional valve body
■
Wax sensor provides consistent
and reliable performance
■
Sensor head may be mounted vertically
or horizontally by interchanging radiator
tail and copper tube fittings
■
Integral balancing adjustment.
■
Energy saving button alerts user to
economical setting for comfort
■
6mm play on radiator tailpiece to allow
for variation in radiator distance from
valve
OPTIONS
■
15, 10 and 8mm angled versions
■
15mm straight version
■
Range stops available separately
■
VT117 heads interchangeable with
CM Zone HR80 heads
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.
© Honeywell Control Products and Systems, Issue 10
THERMOSTATIC RADIATOR VALVE VT117
■ Specification
Maximum Working Pressure : 10 bar
Maximum Differential Pressure : 1 bar
M
aximum Differential Pressure : 0.2 bar
for quiet operation
Maximum Flow Temperature : 120˚C
Hysteresis :≤0.6˚C
Nominal Flow Rate : 200 litres/hour (+/-10%)
Seat Authority : 0.88
Maximum Static Test Pressure : 10 bar
with decorators cap closed
Standards : CE, EN215
■ Dimensions (mm)
■ Installation
The VT117 tailpiece has a 16mm square
s
ection to enable a spanner to be used
to tighten the tailpiece into the radiator.
In order to function adequately, the
VT117 should not be installed in direct
sunlight, or obscured by furniture,
curtains etc.
The VT117D straight valve must be
installed so the water flow is in the
direction of the arrow.
■ Ordering Specification
VT117E -1/2EG
Radiator thermostat with reversible
flow, angled body and 15mm
compression connection
VT117E -1/2BG
As above, but with 10mm
compression connections
VT117E -1/2AG
As above, but with 8mm compression
connections
VT117EPFD -1/2BG
As above, but with 10mm straight
push-fit connection
VT117EPFE -1/2BG
As above, but with 10mm angled
push-fit connection
VT117D -1/2EG
Radiator thermostat with straight body
and 15mm compression connections
T100 - 353
Replacement thermostatic head for all
ZS100
Set of 10 range stops for all heads
ZS117 -1/2B / E
Spare 10mm / 15mm nut and olive
sets for VT117. Packs of ten
* Plus up to 6mm movement
■ Temperature Range
Mounted on the radiator flow with head vertical.
123456
6˚C Frost 11˚C 14˚C 17˚C 20˚C 23˚C 26˚C
Protection
Overall maximum horizontal length
allowance to accommodate valve to be
more than 162mm. Copper pipe entr y
depth 10mm maximum.
■ Flow Rate Chart
■ Servicing
The VT117 has a removable
insert (V100U) that can be replaced.
The V100U insert also incorporates
the integral balancing device which is
adjusted by inser ting a screwdriver in
the slot and turning. This acts to limit
the maximum opening of the valve.
© Honeywell Control Products and Systems, Issue 10, 5.11
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