Mira Orbis User's Guide download pdf (Page 8)

Zone of

Backow Risk

30 mm

Minimum

Toilet or Bidet

FC5

Hand Basin

FC3

Bath or Shower

Tray FC3

Electric

Shower

25 mm

Minimum

25 mm Minimum

15. A full bore/non restrictive servicing valve must be tted in a readily accessible

position adjacent to the shower to facilitate maintenance of the shower.

DO NOT use a valve with a loose washer plate (jumper) as this can lead to a

build up of static pressure.

16. A water treatment device should be installed where the water hardness may

exceed 200 ppm. Malfunctions caused by excessive limescale formation are

not covered by this shower’s guarantee (see back page for details).

17. The installation must not cause the hose to be sharply kinked during normal use.

18. DO NOT perform the electrical installation until the plumbing has been completed

and checked for leaks.

Hose Retaining Ring tted and shower ttings xed at a suitable height preventing

dirty water backow.

Note! There will be occasions when the hose retaining ring will not provide a suitable

solution for Fluid Category 3 installations, in these instances an outlet double

checkvalve must be tted, this will increase the required supply pressure typically by

10kPa (0.1 bar). Double checkvalves tted in the inlet supply to the appliance cause

a pressure build up, which affect the maximum static inlet pressure for the appliance

and must not be tted. For Fluid category 5 double checkvalves are not suitable.

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Mira Orbis User's Guide Page 8