Mira Advance ATL Installation & User Manual page 14

1.7. When installing the inlet connector for back inlet supply (refer to Section 8,
"Installation") connection, it is advisable to seal around the incoming mains-
fed supply to prevent water ingress into the wall.
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 Advance.
Do not use a valve with a loose washer plate (jumper) as this can lead to a build
up of static pressures.
1.9. The Mira Advance ATL is fitted with a 1/2" BSP male outlet thread, to accept
a Mira shower hose.
1.10. Refrain from applying excessive force when making any connections. Always
provide mechanical support when making the plumbing connections.
1.11. 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.
Note! Supply pipework MUST be flushed to clear debris before connecting the
Mira Advance ATL. 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 Advance ATL
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 backsiphonage (refer to Figure 2). 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 buildup, which could exceed the maximum static inlet pressure
for the appliance.
1.14. Avoid layouts where the shower hose will be sharply kinked. This may reduce
the life of the hose.
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