BWT Multipur AP Instructions De Montage page 12

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GB GB

> 400 mm

The backwashing process is triggered primarily

by differential pressure.

If heavy soiling of the filter element causes the

pressure difference to exceed the preset value

(approx. 0.8 bar) within the preset backwash in-

terval, the differential pressure generator causes

the unit to backwash. The preset backwash inter-

val starts again.

The filter is equipped with a central instrumenta-

tion and control (CIC) connection (contact closes

in the event of malfunction or power failure).

Preliminary installation

conditions

Local plumbing codes, general guidelines and the

technical data must be observed.

The system must be installed by the water supply

utility or a plumbing company approved by the water

supply utility in accordance with these installation

and operating instructions and the applicable

regulations.

The installation site must be frostproof and ensure

that the filter is protected from solvent vapours,

heating oil, lees, acidic cleaners, chemicals of all

kinds, direct UV radiation and heat over 40 °C.

A separate power socket (230 V AC, 50 Hz) within a

distance of approx. 1.2 m is required. The power supply

must be permanently ensured. Voltage peaks over 1

kV must be avoided.

If the water contains dirt particles > 2 mm, a coarse

dirt trap must be installed upstream from the filter.

min. DN 50

A flushing water quantity of at least 1.4 l/s (5 m³/h)

must be available for backwashing.

A drainage connection (min. DN 50) must be available

for discharge of the rinsing water.

Avoid extreme pressure surges (caused, for example,

by downstream solenoid valves or similar).