Mira Sprint 7.5 Installation, Operation, Maintenance Manual page 11

1.4. The Mira Sprint is fitted with a plastic inlet connector intended to connect to a
15 mm compression fitting supplied from the top, bottom or back.
1.5. Do not fit the Mira Sprint to the wall and tile up to the case. The Mira Sprint must
be fitted on to a finished flat and even wall surface. 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 Sprint 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 Sprint. 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 Sprint 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
Sprint.
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 Sprint 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. To comply with Regulations/Bye-laws which refer to shower hose connections,
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.
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