Mira GO 8.5 Installation, Operation, Maintenance Manual page 11

1.4. The Mira Go is fitted with a plastic inlet connector intended to connect to a
15 mm compression fitting (not supplied) from the top, bottom or back.
1.5. Do not fit the Mira Go to the wall and tile up to the case. The Mira Go must be
fitted on to a finished flat and even wall surface (this wall surface should be tiled
or waterproofed). This is important as difficulty may be encountered when fitting
the cover and subsequent operation of the unit could be impaired (Small pillars
moulded on to the back of the case allow air circulation).
1.6. Refrain from applying excessive force when making any connections. Always
provide mechanical support when making the plumbing connections.
1.7. Do not install the Mira Go in a position where it may become frozen. The
shower unit must not be fitted where it may be exposed to freezing conditions.
Do not operate the unit if suspected of being frozen.
1.8. We recommend that a non-restrictive (free flowing) isolating valve is fitted in the
cold water supply pipe to allow the complete maintenance of the Mira Go. Do not
use a valve with a loose washer plate (jumper) as this can lead to a build up of
static pressures.
1.9. 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.
1.10. The Mira Go is fitted with a ½ " BSP male outlet thread, to accept a Mira shower
hose.
1.11. Supply pipework MUST be flushed to clear debris before connecting the Mira
Go. Debris will reduce the performance of the unit.
1.12. 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. Mira Go malfunction due to excessive
limescale formation is not covered by the manufacturer's guarantee. Your local
water company will be able to advise the hardness of water in your area.
1.13. A hose retaining ring is supplied to prevent the handset from dropping below the
spillover level of the bath or shower, which could lead to contamination from
back-siphonage (refer to Figure 1). The supplied hose retaining ring should meet
the great majority of user requirements for shower installations with flexible
outlet fittings. However, there will be occasions when the hose retaining ring will
not provide a suitable solution. In these instances an outlet double checkvalve,
e.g. the Mira DCV-H, must be fitted. The inclusion of the Mira DCV-H will
increase the required supply pressure typically by 0.1 bar.
Double checkvalves, fitted in the inlet supply to the appliance, cause a pressure
build-up, which could exceed the maximum static inlet pressure for the
appliance.
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