Mira Activate Series Installation And User Manual page 47

4c - Product flowing water when switched off:
The digital mixing valve reduces the water flow slowly before final shut-off to reduce the
severity of water hammer. The time duration depends on the flow rate and system pressures.
This is normal and not a product fault.
Shower fittings can continue to drain down after the digital mixing valve is shut off, especially
where there are large volumes of water present (e.g. large deluge heads or long pipe runs).
This process can take several hours and may be triggered by changes in temperature or
atmospheric pressure. This is normal and not a product fault. We would therefore recommend
that all water outlets are kept contained within the water catchment area.
1. Check the issue is not a natural draining of the fittings. Remove the fittings and
monitor the outlet if necessary.
2. Activate the shower a number of times at maximum flow to dislodge any debris.
3. If none of the above resolved the issue, isolate the water and power supply and
contact Mira Customer Service Team.
4d - Showering temperature is hotter / colder than indicated or is fluctuating:
Note: The temperature displayed on the user interface is measured inside the digital
mixing valve, not at the shower outlet.
The perceived temperature of the water from your shower can vary with shower fittings and
room temperature. A wider, finer spray will cool more quickly and feel cooler than a direct
spray, and long outlet pipe runs can also influence the blend temperature, in which case
you may need to adjust the showering temperature.
1. Combi Boiler fed products: Check the hot water supply is hot enough when
the shower is in use. Combi boilers are sometimes unable to maintain temperatures
at higher flows or may cut-out at lower flows. Check no other devices are using hot
water at the same time. Reduce or increase the outlet flow to around 8 litres per
minute and see if that solves the issue. Tip: Use the Mira Showers app to check the
temperature of the hot water inlet when the shower is running.
2. Hot water storage tank fed products: Check the hot water supply is not being
depleted in use. Reduce the outlet flow or reduce showering time and see if that
solves the issue. Tip: Use the Mira Showers app to check the temperature of the hot
water inlet when the shower is running.
3. Check the hot and cold supplies are connected to the correct inlets, and that the
temperature and pressures are within the product specification and are stable. Inlet
water pressures must be nominally equal. Note: Use the Mira Showers app to
check the temperature of the hot water inlet.
4. Check no other devices are using water at the same time. Devices switching on/
off (e.g. washing machines, taps etc.) can rapidly change the water pressure of the
system causing rapid pressure and temperature changes.
5. Ensure Inlet filters and check valves, shower head and hose are not blocked (refer
to "Cleaning and Maintenance Section").
6. If none of the above resolved the issue, and the measured temperature is
significantly different to that on the controller display, contact Mira Customer Service
Team.
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