Scope Of Supply; Purpose; Filtration; Pressure Reducer (Only E1 Hws) - BWT E1 EHF 3/4-1 Instrucciones De Instalación Y De Servicio

EN

1. Scope of supply

E1 consisting of:
1 Lever (handle)
2 Cap
3 Connection screw joints and seals
3A Connection screw joints and seals, with a back-
flow preventer on the input side (with control
screw or facility for the connection of an inlet
pressure gauge, only E1 HWS)
4 Supporting core incl. hygienic vault (= filter cup
+ filter element)
5 Back pressure manometer (only E1 HWS)
6 Stopcock/unlocking device
7 LED electronic filter change display (visual
signal only) 2xAAA batteries included
Pressure reducer (only E1 HWS, Fig. 4) consisting of:
8 Spring cap
9 Display for back pressure setting value
10 Locking screw
11 Rotary knob for pressure reducer
12 Pressure reducer element
13 Slide ring
To be ordered separately:
Replacement filter element (in pack of 2)
 Order number DE: 10386 (100 µm)
 Order number AT: 810386 (100 µm)
 Order number DE: 10376 (30 µm)
 Order number AT: 810376 (30 µm)
Or for optimum hygiene: hygienic vault = filter cup
+ filter element + individually packaged lid, Replace-
ment without touching components exposed to water.
 Order number DE: 10393 (100 µm)
 Order number AT: 810393 (100 µm)
 Order number DE: 10375 (30 µm)
 Order number AT: 810375 (30 µm)

2. Purpose

2.1 Filtration

The BWT E1 is intended for the filtration of drinking
and service water. It protects the water pipes and the
connected water-bearing system components from
functional defects and corrosion damage by foreign
particles such as rust particles, shavings, sand, hemp,
etc. The filter cannot be used with chemically treated
circulation water, process water and cooling water
for flow cooling. A coarse dirt separator must be ins-
talled upstream for waters with coarse dirt particles.
The filters are not suitable for oils, fats, solvents, soaps
and other lubricating media. Neither are they suitab-
le for the separation of water-soluble substances.
14

2.2 Pressure reducer (only E1 HWS)

The integrated pressure reducer installed downstream
from the filter serves to reduce pressure and regu-
late a desired back pressure, predominantly in the
domestic water supply plant. It keeps the regulated
back pressure almost constant, even when the pre-
pressure fluctuates between, for example, 16 bar
and the set back pressure, e.g. 3 bar. A uniform, not
too high pressure preserves fittings and devices in
the entire domestic water installation, helps to save
up to 50 % of water and minimises noise evolution.
We recommend the installation of a pressure redu-
cer from 4 bar pre-pressure.
Caution: The plant must be set up according to the
installation and operating instructions of the AVB
Water V, Sec. 12.2. by the water supply company
or an installation company entered into the installer
directory of a water supply company.

3. Function

3.1 Filtration
The raw water flows through the raw water inlet
into the filter and then from the outside to the inside
through the filter element to the pure water outlet. The
foreign particles larger than the filter rating are retai-
ned on the outside of the filter fabric. Clean water
enters into the pipeline system.
If as a result of the increasing contamination of the
filter fabric the water pressure decreases perceptib-
ly, the filter element must be replaced. BUT AFTER 6
MONTHS AT THE LATEST! The electronic LED change
display indicates this in a timely manner (see 7).
3.2 Pressure reducer + backflow preventer (only
E1 HWS)
The pressure reducer works according to the prin-
ciple of the relieved single-seat valve. It is controlled
starting from the back pressure via a large-dimen-
sioned membrane and a pressure spring, the ten-
sion and thus the back pressure of which can be
changed with the rotary knob (11). The display (5)
shows the respective back pressure setting value.
The backflow preventer only opens in the direction
of flow when water is removed and is tightly sealed
in idle position or counterpressure.

4. Installation pre-requisites

Heed local installation regulations, general guide-
lines and technical data. Install filters in cold water
pipes upstream from the objects to be protected.
Caution: The installation site must be frostproof and
avoid disruptive influences (e.g. solvent vapours,
heating oil, washing alkalis, all kinds of chemicals,