Mira DISCOVERY Installation And User Manual page 33

The British Burns Association recommends 37 to 37.5°C as a comfortable bathing
temperature for children. In premises covered by the Care Standards Act 2000, the
maximum mixed water outlet temperature is 43°C.
The thermostatic mixing valve will be installed in such a position that maintenance
of the TMV and its valves and the commissioning and testing of the TMV can be
undertaken.
The fitting of isolation valves is required as close as practicable to the water supply
inlets of the thermostatic mixing valve.
Commissioning notes for Thermostatic Mixing Valves
The first step in commissioning a thermostatic mixing valve is to check the
following:
The designation of the thermostatic mixing valve matches the application.
The supply pressures are within the valves operating range.
The supply temperatures are within the valves operating valve.
Isolating valves (and strainers preferred) are provided.
If all of these conditions are met, proceed to set the temperature as specified in
section: 'Commissioning'.
Important! The mixed water temperature at the discharge point must never exceed
46°C
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.
Carry out the cold water supply isolation test by isolating the cold water to the TMV,
wait for five seconds if water is still flowing check that the temperature is below
46°C.
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 of the valve 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
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