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coMMiSSioninG
commissioning must be carried out in accordance
with these instructions, and must be conducted by
designated, qualified and competent personnel.
Exercising the Thermostat
thermostatic mixing valves with wax thermostats
are inclined to lose their responsiveness if not
used. Valves which have been in storage, installed
but not commissioned, or simply not used for
some time should be exercised before setting the
maximum temperature or carrying out any tests.
a simple way to provide this exercise is:
(a) Make sure 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.
Maximum Temperature
Note! For type 2 and type 3 valves in healthcare
installations the maximum blend temperature is
determined by the application, refer to section:
'Type 2 and Type 3 Valves, Application'.
the maximum blend temperature obtainable by
the user should be limited, to prevent accidental
selection of a temperature that is too hot.
all Mira thermostatic mixing valves are fully
performance tested and the maximum temperature
is preset to approximately 41°c under ideal
installation conditions at the factory.
Site conditions and personal preference may
dictate that the maximum temperature has to be
reset following installation.
temperatures should always be recorded using
a thermometer with proven accuracy.
Maximum Temperature Setting
Before using the shower, the maximum
temperature level must be checked to make sure
that it is safe. it has been preset to approximately
41°c at the factory, but due to variations in site
conditions the maximum temperature may need
adjustment.
Note! Make sure that the hot water temperature
is at least 55°C and that there is a sufficient
supply.
1. turn on the shower to maximum flow
and temperature (i.e. both controls fully
anticlockwise) and allow the temperature to
stabilise.
if the temperature is too hot or too cold adjust
as follows:
2. Using a 2.5 mm Hexagon Key (supplied),
unscrew and remove the temperature control
lever.
3. insert the 2.5 mm hexagon Key into the centre
of the Green hub and engage with the hidden
temperature adjust Screw.
4. turn the hexagon Key until the required
maximum showering temperature is obtained.
turn anticlockwise to increase or clockwise
to decrease the temperature (¼ turn =
approximately 1°C).
temperature
control lever
5. once the desired maximum blend temperature
has been achieved, turn off the shower.
6. Refit the Temperature Control Lever.
7. check that the showering temperature is
correct.
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