VALVE INSTALLATION GUIDELINES AND COMPLIANCE
The valve must be installed so that it is readily accessible for commissioning and maintenance in accordance
with the TMV2 scheme. The valve must be installed with isolation valves on both the hot and cold water
systems as close as possible to the valve; so as to allow the valve to be commissioned and tested correctly.
The valve is fitted with integral check valve cartridges which command the water supply, therefore the
thermostatic valve is protected against cross-flow due to unbalanced line pressures as required by the Water
Supply (Water Fittings) Regulations 1999.
Most problems associated with the operation of thermostatic shower valves are caused by debris in the new
pipe work getting into the thermostat. These problems are easily avoided by thoroughly flushing the pipe work
BEFORE
the shower valve is fitted.
WATER SUPPLY - (WATER FITTINGS) REGULATIONS 1999
This valve complies with the requirements of the above regulations and installation should be carried out in
strict compliance with them.
MOUNTING BAR SHOWER VALVES
There are two methods of mounting the bar shower valve using the components supplied. These methods are
detailed on the following pages. Please read the information below to determine the most suitable option for
your installation:
Option 1 - Cranked connector
This option requires a 1/2” BSP female adapter (not supplied) to connect the cranked connectors to the pipe
work. This method is clip mounted and requires that the pipe work the valve is connected to be supported and
be rigid.
Option 2 - Wall fixed connectors
This option requires a suitably strong wall construction to support the weight of the valve. Suitable wall fixings
must be used (not supplied).
COMMISSIONING
It is important that incoming water supplies conform to the requirements specified for pressure and
temperature. Assure that supply water conditions satisfy any guidance information for the control of bacteria
and that the designation of the supplied valve suits the application. Do not continue commissioning until
supplies are correct and stable considering variation caused by other service users.
Use a calibrated thermometer for testing incoming and mixed water.
1.
Record temperature of the incoming hot and cold supply.
2.
Record temperature of mixed discharge at maximum draw off rate.
3.
Record temperature of mixed discharge at minimum draw off rate.
4.
Isolate the cold water supply and measure the mixed water temperature as the cold water failure device
reacts. This should deviate by no more than + 2°C of the initial maximum set point. Restore the cold supply
and measure the stabilised mixed water temperature. This must not deviate by more than + / - 2°C of the
initial set recorded result. Record these findings.
5.
Record the measuring equipment used for the measurements.
The above records must be retained and updated during the service life of the TMV.
If there is a residual flow during the commissioning or the annual verification (cold water supply isolation test),
then this is acceptable providing the temperature of the water seeping from the valve is no more than 2oC
above the designated maximum mixed water outlet temperature setting of the valve.
Temperature readings should be taken at the normal flow rate after allowing for the system to stabilise.
The sensing part of the thermometer probe must be fully submerged in the water that is to be tested.
Any TMV that has been adjusted or serviced must be re-commissioned and re-tested in accordance with the
manufacturers' instructions.
The installation of thermostatic mixing valves must comply with the requirements of the Water Supply (Water
Fittings) Regulations 1999.
IN SERVICE TESTING & MAINTENANCE
It is a requirement that all TMV2 approved valves shall be verified against the original set temperature results
once a year. When commissioning/testing is due the following performance checks shall be carried out.
Measure the mixed water temperature at the outlet.
The mixed water temperature at the terminal fitting must never exceed 46oC.
Carry out the cold water supply isolation test by isolating the cold water supply to the TMV, wait for five
seconds if water is still flowing check that the temperature is below 46oC.
If there is no significant change to the set outlet temperature (±2°C or less change from the original settings)
and the fail-safe shut off is functioning, then the valve is working correctly and no further service work is
required.
Notes
If there is a residual flow during the commissioning or the annual verification (cold water supply isolation test),
then this is acceptable providing the temperature of the water seeping from the valve is no more than 2oC
above the designated maximum mixed water outlet temperature setting of the valve.
Temperature readings should be taken at the normal flow rate after allowing for the system to stabilise.
The sensing part of the thermometer probe must be fully submerged in the water that is to be tested.
Any TMV that has been adjusted or serviced must be re-commissioned and re-tested in accordance with the
manufacturers' instructions.
The installation of thermostatic mixing valves must comply with the requirements of the Water Supply (Water
Fittings) Regulations 1999.
297mm
G1/2" BSP
129mm
150mm
KINETIC BOTTOM OUTLET BAR VALVE SHOWN
