Mira elite 2 Installation, Operation, Maintenance Manual page 12

1.4. We recommend that a non restrictive (free flowing) isolating valve is fitted into
the supply from the cold water cistern, for maintenance purposes.
1.5. The Elite 2 must be fitted ONTO the finished wall surface i.e. on top of the tiles.
DO NOT block the air ventilation gaps around the sides of the unit, either by tiling
up to the sides of the unit or by using a sealant around the case. This Elite 2 is
designed to be ventilated. Failure to do this may cause product failure.
1.6. Inlet: 15 mm inlet compression connector is designed to accept plumbing
supplies from the top or back.
1.7. Back entry plumbing is accommodated without the need to recess the
15 mm inlet compression connector, enabling the wall's surface to be completed
and sealed to prevent water ingress, before final fitting.
1.8. Swivel the inlet connector assembly to suit (not directly back into the wall). Avoid
trapping the green earth bonding wire.
1.9. Use only the 15 mm inlet compression connector supplied with the Elite 2, do not
use any other types of fitting.
1.10. Outlet: 1/2" BSP male, to accept Mira flexible hose.
1.11. Refrain from applying excessive force when making connections.
Note! Excessive force on the pump housing can impair pumping
performance. Make sure that the supply pipe is trimmed and bent such that
the 15 mm inlet connector sits (or can be lightly pressed) easily on the back
of the clamp bracket prior to connection with the pump housing.
1.12. To avoid damage to the case when soldered fittings are used, pre-solder the
pipework and fittings before connecting them to the 15 mm inlet compression
connector.
1.13. Supply pipework MUST be flushed to clear debris before connecting the Elite 2.
1.14. 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.
12