11
COMMISSIONING
Commissioning must be carried out in accordance with these instructions, and
must be conducted by designated, qualified and competent personnel.
Note! For Healthcare Installations, all results must be recorded.
1.
Restore the water supply and check that there are no leaks.
2.
Restore the power supply.
3.
Position your hand over the flow sensor (indicated by a tap) on the control panel
to start the DMV, to flush out any air.
4.
Check the supply temperatures and pressures are within the range stated
in
SPeCIFICATIONS
and the guidance information on the prevention of
legionella.
5.
For Type 2 and 3 installations, check that the designation of the DMV matches
the application. The supply pressures and temperatures are within the permitted
range for the application.
6.
Check inlet pipework temperatures for correct function of checkvalves
i.e. the hot water does not cross flow into the cold water supply.
7.
Check that the temperature(s) and flow rates obtainable are acceptable.
8.
Carry out a performance check:
Healthcare
Isolate the cold water supply to the mixing valve and monitor the mixed water
temperature. Record the maximum temperature achieved and the final stabilised
temperature on restoration of the cold water supply.
Note!
The final stabilised mixed water temperature should not exceed 43 °C.
Any higher temperatures should only occur briefly.
Commercial
Locate another outlet on the common cold water supply close to the mixing
valve (operating this outlet should cause a drop in supply pressure), and
note the subsequent effect on blend temperature (should be no more than
2
o
C change).