5.15
NO
N-ELEC
TRIC
CO
NTR
OLS
VT15
THERMOSTATIC RADIATOR VALVE
FEATURES�
Bi-directional valve body�
Wax sensor provides consistentand reliable performance
�
Sensor head may be mounted verticallyor horizontally by
interchanging radiator
tail and copper tube fittings�
Range stops included in head�
6mm of play on radiator tailpieceto allow for variation in
radiator
distance from valve�
OPTIONS�
15, 10 and 8mm angled versions�
VA8200A001 tool allowsremoval/replacement without
draining down system
APPLICATIONThe VT15 radiator thermostat, which has full CEN
Standardapproval to EN215, regulates individual radiator output in
wetcentral heating systems. Radiator thermostats are
particularlyuseful in taking advantage of uncontrolled heat gains
(e.g. solargain or an open fire in a living room).
Because the valve body design is not sensitive to water
flowdirection and its radiator tail and copper tube connections
areinterchangeable, the VT15 radiator thermostat can be
mountedvertically or horizontally at either end of the
radiator.
The VT15 should not be fitted to a radiator in a room where
thereis a room thermostat. Suitable for two pipe systems only.
© Honeywell Control Products and Systems, Issue 10
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THERMOSTATIC RADIATOR VALVE VT15� Specification
Maximum Working Pressure : 10 bar
Maximum Differential Pressure : 1 bar
Max. Differential Pressure : 0.2 barfor quiet operation
Maximum Flow Temperature : 130˚C
Closing Time : 20 minutes
Approvals : CEN: EN215
� Dimensions (mm)
� Installation
The VT15 tailpiece has a 14mmsquare section to enable a
spannerto be used to tighten the tailpieceinto the radiator.
In order to function adequately, theVT15 should not be installed
in directsunlight, or obscured by furniture,curtains etc.
� Ordering Specification
VT15 - AGRadiator thermostat valve withreversible flow, angled
body and 8mmconnection and instructions
VT15 - BGAs above, but with 10mm connections
VT15 - EGAs above, but with 8mm connections
T9002W0Replacement thermostatic head
VA8200A001Insert replacement tool. Servicewithout draining
system
� Flow Rate Chart
� ServicingThe VT15 valve body has a removable insert that can
be removed andreplaced without the need to drain the system.
Alternatively, the insert canbe removed and the valve seat cleaned.
Both these operations require theuse of the VA8200A001 insert
replacement tool.
� Temperature ScaleMounted on the radiator flow with head
vertical. These temperatures are forguidance only and may vary
slightly depending on the nature of the installation.
* Plus 6mm of movement
0 � 1 2 3 4 5
Off 6˚C Frost 10˚C 15˚C 20˚C 23˚C 26˚C
© Honeywell Control Products and Systems, Issue 10, 5.15
0014_Section 5_dft10_V2.qxd:Section 5_dft9 9/10/07 10:06 Page
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