What is a thermostatic radiator valve (TRV)?
room being controlled at a lower
temperature, and saves energy.
...an explanation for householders
User Manual
TRVs sense the air temperature around them and
regulate the flow of water through the radiator which
they are fitted to. They do not control the boiler.
TRVs need a free flow of air to
sense the temperature, so they
must not be covered by curtains
or blocked by furniture.
They should be set at a level that gives you the room
temperature you want. These settings may have to be
different in each room, and you should set the TRVs to
suit each room and then leave them to do their job.
TRVs cannot turn off the boiler when the whole house
is warm. To do that, you will need a room thermostat as
well. The radiator in the room with the room thermostat
should normally have a TRV, but, if it does, keep the
TRV on the maximum setting and adjust the room
thermostat as explained with the instructions.
Turning a TRV to a higher setting will not make the room
heat up any faster. How quickly the room heats up
depends on the boiler size and setting, and the radiator
size. Turning the TRV to a lower setting will result in the
This manual applies to the following homexperttm by Honeywell products
TRV15AHC: Angled TRV Kit — Chrome
TRV15SHC: Straight TRV Kit — Chrome
TRV15AHW: Angled TRV Kit — White
TRV15SHW: Straight TRV Kit — White
TRV15AHWC: Angled TRV Kit — Chrome & White
TRV15SHWC: Straight TRV Kit — Chrome & White
Thermostatic
Radiator Valve
50051974-001 Rev. A
Installation options
Valve installation
Remove protective cap and connect fittings to radiator and hot water source as shown below. If necessary, cut
supplied copper tubes to an entry depth of 10 mm into the TRV to ensure a secure connection.
Thermostatic
radiator valve (TRV)
Lockshield valve
(optional)
The TRV can be installed on either side
of the radiator, in a vertical or horizontal
position, as shown at left.
Cap
If a lockshield valve is also used on the
same radiator, install it on the opposite
side of the radiator, as shown.
TRV
Connection to radiator
OUT (cool)
IN (hot)
OUT (cool)
IN (hot)
TRV
Connection to
hot water pipe
OUT (cool)
IN (hot)
OUT (cool)
IN (hot)
NOTE: If you are not experienced in equipment installation, we recommend that these
procedures be done by a professional installer.
NOTE: Keep the protective cap.You can remove the thermostat sensor (see next page) and
screw the cap back into place to prevent water overflow if you must remove the radiator later.
ALLOW RADIATOR TO COOL BEFORE INSTALLATION: To avoid injury, turn off boiler or stop
hot water flow to radiator and allow it to cool before installation.
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