Mira JUMP Installation And User Manual page 12

9. This appliance is not designed to have plumbing connected directly to the rear.
For a supply connected behind the shower, add an elbow to the supply pipe
and connect to the inlet as a rising or side supply.
10. Do not install the appliance in a position where it may become frozen. The
shower unit must not be fitted where it may be exposed to freezing conditions.
The shower unit must not be used if you suspect it may be frozen.
11. 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 appliance.
Do not use a valve with a loose washer plate (jumper) as this can lead to a build
up of static pressure.
12. To avoid damage to the case when soldered fittings are used, pre-solder the
pipework and fittings before connecting them to the inlet stub.
13. To ensure the case and other components are not put under strain during
installation always provide mechanical support when making plumbing
connections. Upon completion of the installation ensure connections and
back case are not under any stress due to misaligned pipework or electrical
cables.
14. Supply pipework must be flushed to clear debris before connecting the
appliance.
15. The appliance is fitted with a 1/2" BSP male outlet thread, to accept a Mira Jump
shower hose.
16. When installed in very hard water areas (above 200ppm temporary hardness)
your installer may advise the installation of a water treatment device, to reduce
the effects of limescale formation. Appliance malfunction due to excessive
limescale formation is not covered by the manufacturer's guarantee. Your local
water company will be able to advise on the hardness of water in your area.
17. A hose retaining soap dish is supplied to prevent
the showerhead from dropping below the spillover
level of the bath or shower, which could lead to
contamination from back-siphonage.
The supplied hose retaining soap dish should
meet the majority of user requirements for shower
installations with flexible outlet fittings. However,
there will be occasions when the hose retaining
soap dish will not provide a suitable solution.
In these instances an outlet double checkvalve
must be fitted, this will increase the required
supply pressure typically by 10kPa (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.
18. Avoid layouts where the shower hose will be sharply kinked. This may reduce
the life of the hose.
12