THERMOSTATIC MIXING VALVES: D1088 & D1089
4
COMMISIONING
Since the installed supply conditions are likely to be different from those applied in the
laboratory tests, it is appropriate, at commissioning, to carry out some simple checks and tests
on each mixing valve to provide a performance reference point for future in-service tests.
a)
The designation (TMV3) of the Thermostatic Mixing Valve matches the intended application.
b)
The supply pressures are within the range of operating pressures for the designation of
the valve.
c)
The supply temperatures are within the range permitted for the valve and within guidance
information on the prevention of legionella etc.
d)
Record the temperature of the hot and cold water supplies.
e)
Record the temperature of the mixed water at the largest draw-off flow rate.
f)
Record the temperature of the mixed water at a smaller draw-off flow rate.
g)
Isolate the cold water supply to the mixing valve and monitor the mixed water temperature.
h)
Record the maximum temperature achieved as a result of (g) and the final
stabilised temperature.
Note: The final stabilised mixed water temperature should not exceed the values in the following table.
i) Use recording equipment such as a thermometer etc. used for the measurements.
Application
Mixed Water Temperature
Bidet
40°C
Shower
43°C
Washbasin
43°C
Bath (44°C Fill)
46°C
Bath (46°C Fill)
48°C
Table 4 - Guide to Maximum Stabilised Temperatures Recorded During Site Tests
