© Intatec Ltd 2013
26
Commissioning
5. If the mixed water temperature exceeds the recommended temperature of 41˚C by 2˚C or
does not reach 41˚C the shower valve can be adjusted as follows:
5.1 With stable supply conditions remove the temperature control knob.
5.2 Rotate the temperature control knob by one spline clockwise to increase the temperature
and one spline anticlockwise to reduce it.
5.3 Measure the water discharging from the shower.
5.4 Repeat 5.2 until the desired temperature is stabilised and record the temperature.
5.5 Repeat 4.4 and 4.5
5.6 Secure the temperature control knob with the retaining screw and re-fit the cover.
6. The above information must be recorded and updated on every occasion when any work is
carried out on the valve.
In Service Testing
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.
1. Measure the mixed water temperature at the outlet.
2. Carry out the cold water supply isolation test by isolating the cold water supply, wait for five
seconds if water is still flowing check that the temperature is below 43
˚
C.
3. If there is no significant change to the set outlet temperature (±2˚C or less 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 2˚C 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 to be
tested.
• Any thermostatic shower that has been adjusted or serviced must be re-commissioned and
re-tested in accordance with the manufacturers’ instructions.
