Mira Play 8.5 kW Installation & User Manual page 9

Plumbing (checklist in detail)
1. The appliance is designed to operate with a minimum maintained inlet
pressure of 70 kPa (0.7 bar), for 8.5 kW and 9.5 kW and 100 kPa (1.0 bar)
for 10.8 kW up to a maximum static inlet pressure of 1000 kPa (10 bar).
2. When installed in very hard water areas (above 200 ppm temporary hardness)
your installer may advise the installation of a water treatment device, to reduce
the effects of limescale formation. Your local water company will be able to
advise the hardness of water in your area.
3. It is recommended that a non-restrictive (free flowing) isolating valve is fitted
as part of the cold water supply pipe to allow the complete maintenance of the
appliance. Do not use a valve with a loose washer plate (jumper) as this can
lead to the build up of static pressure.
4. The appliance is only suitable for installation within the shower area. It is fitted
with a pressure relief device and must be positioned over a water catchment
area with the controls at a convenient height for all users.
5.
The appliance must be fitted onto a finished flat and even wall surface (this
wall surface should be tiled or suitably waterproofed). Do not fit the appliance
to the wall and tile up to the case. For safety requirements, an air gap must be
left behind the appliance.
6.
Avoid layouts where the shower hose will be sharply kinked. This may reduce
the life of the hose.
7. A Hose Retaining Ring is supplied to prevent the handset from dropping below
the spill-over level of the bath or shower tray, which could lead to contamination
from back-siphoning. The supplied Hose Retaining Ring should meet the greater
majority of user requirements for shower installations with flexible outlet fittings.
However, there will be occasions where it will not provide a suitable solution. In
these instances an outlet double checkvalve, e.g. a Mira DCV-H, must be fitted.
This will increase the required supply pressure typically by 10 kPa (0.1 bar).
See section "Accessories".
8. Supply pipework must be flushed to clear any debris before connecting to the
appliance.
9.
To avoid damage to the case when soldered fittings are used, pre-solder the
pipework and fittings before connecting them to the inlet connector assembly.
Refrain from applying excessive force when making any connections. Always
provide mechanical support when making the plumbing connections.
10. The appliance is fitted with a plastic inlet compression assembly for connecting
to a 15 mm supply pipe from the top, bottom or back. Double checkvalves, fitted
in the inlet supply to the appliance, cause a pressure build-up, which could
exceed the maximum static inlet pressure and damage the appliance.
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