17
Commissioning Checks
(Temperatures should always be recorded with a thermometer with proven accuracy).
1.
Check inlet pipework temperatures for correct function of checkvalves i.e. that
hot water does not cross flow into the cold water supply and vice versa.
2.
Check that the supply pressures are within the range of operating pressures for
the valve.
3.
All connections and the mixer body are water tight.
4.
Exercise the thermostat.
a) ensure that the hot and cold water are available at the valve inlets, and the
outlet is open.
b) Move the temperature control rapidly from cold to hot and hot back to cold
several times, pausing at each extreme.
5.
Adjust the temperature of the mixed water in accordance with the instructions
(refer to
Maximum Temperature Setting
). For type 3 valves refer to the table
under Application in TYPE 3 VALVES.
6.
Operate the outlet flow control and check:
(a) Flow rate is sufficient for purpose.
(b) Temperature(s) obtainable are acceptable.
It is advisable to establish a performance check at this time, which should be
noted for future reference as part of a Planned Maintenance Programme. The
procedure should be chosen to imitate both typical and difficult operating
conditions, such as any supply pressure fluctuations that may be likely. An ideal
method is to 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).
4.
Remove the shower control
lever, insert the 2.5mm hexagon
key into the centre of valve
head.
5.
Tur n the hexagon key
anticlockwise
to
increase
the
temperature, or
clockwise
to
decrease
temperature.
6.
Refit shower control lever and
turn off the shower valve.
Warmer
Cooler