Commissioning; Commissioning Checks - Mira EXCEL Installation & User Manual

Commissioning Checks

After completing the installation the following commissioning checks must be carried
out:
Note! Thermostatic mixing valves with wax capsules could 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, turn on the
flow divertor to bath mode.
(b) Turn the temperature control rapidly from cold to hot and back to cold
several times, pausing at each extreme.
Maximum Temperature
The maximum blend temperature through the bath or shower outlet should be limited
to prevent accidental selection of a temperature which may be too hot. All Mira
thermostatic mixing valves are fully performance tested individually and the maximum
temperature for the Mira Excel BSM is pre-set under ideal installation conditions at
the factory to approximately 46°C for bath fill. When diverting from bath mode to
shower mode the maximum preset temperature will be reduced by approximately
6°C. Site conditions may dictate that the maximum temperature has to be re-set
following installation or servicing.
To check the temperature:
1. Turn the flow divertor lever to bath mode and run for several minutes in order to
stabilise the temperature. Make sure that the hot and cold water supplies are
within Mira recommendations. Refer to section: 'Specifications'.
2. Turn the temperature control handle to the hot position (fully anticlockwise). To
re-set the maximum temperature refer to section: 'Maximum Temperature
Setting'. The actual temperature may vary depending on the supply conditions.
3. Turn the flow divertor lever to shower mode (Check that an adequate spray pattern
is delivered from the shower head) and measure the shower temperature. This is
automatically set when the flow divertor is turned to shower mode.
4. Turn the flow divertor lever to the OFF position.
Note! Draining of residual water held in the outlet fittings, may continue for a period
after the flow is shut off.

COMMISSIONING

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