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5
Installation conditions
5.1
General
Observe all applicable local installation regulations, general guidelines
and technical specifications.
The unit must be installed as described in the installation/operating ins-
tructions in compliance with AVB Wasser V, §12 (general requirements
for the supply of water in Germany) by a qualified water supply company
or by a party registered in the water supply company's index of fitters.
The minimum emission power (switching point) is programmed to the
value (specified in W/m²) certified for the respective rated transmission
(SAC rating). The warning threshold is 1.1 times above the minimum
emission power (in accordance with W294-1 section 9.2).
If the warning threshold or the minimum emission power is not met, this
is displayed by the UV-Control II (cf. EBA UV-Control II) and should be
connected to an audio or visual signal transmitter.
5.2
Installation site and environment
The installation site must be protected against frost and kept free of
chemicals, paint, solvents and fumes. Neither the ambient temperature
nor the radiation temperature may exceed 40°C in the immediate vicinity.
The floor of the installation site must have a sufficient load-bearing
capacity if the unit is to be installed on the floor.
There must be a connection to the sewage system for the flushing
water nearby.
Flushing water hoses must be attached to the sewage connection with
a safety spacing of at least twice the interior diameter of the flushing
water hose or min. 20 mm above the highest possible waste water level
(free outflow).
There must be a clearance above the unit to facilitate emitter replace-
ment (see dimensions).
If the cable length between the UV emitters and the ballast unit is longer
than 6 m, please consult our technical department.
The emission of interference (voltage peaks, high-frequency electro-
magnetic fields, interference voltages, voltage fluctuations, etc.) by the
surrounding electrical systems may not exceed the maximum values
specified in EN 61000-6-4.
5.3
Feed water
The drinking water to be fed into the unit must always meet the
specifications of the German Drinking Water Ordinance ['Trinkwasser-
verordnung'] or EU Directive 98/83/EC.
The hydraulic conditions must be such that a vacuum can never form
in the UV unit.
The Bewades unit has been designed and built primarily for static loads.
Avoid pressure surges and fluctuating loads (e.g. from pumps starting,
pressure booster pulsation, quickly closing valves, etc.).
Suitable installations for avoiding pressure surges or fluctuating loads
(e.g. expansion vessels, compressed air chambers, slowly closing
valves, etc.) must be installed externally.
24
5.4
Installation
The data determined during the consultation must be entered in the
operating data sheet. The data is programmed into the controller on
startup (see UV-Control II installation and operating instructions).
Use corrosion-resistant pipe materials for installation. Take corrosion-
causing chemical properties into consideration when different pipe
materials are combined (mixed installation).
A protective filter must always be installed upstream from the unit to
protect it from foreign particles.
In certain circumstances, the water must be pre-treated. Depending on
the operating conditions and water quality, the water may be partially
softened to prevent deposits on the emitter casing tubes.
The emitter connection cable must be made as short as possible.
It may not be laid in loops.
5.5
Operation
In order to guarantee fault-free, safe operation of the Bewades UV unit,
technical consultation is required before installation. During the consulta-
tion, the rated transmission of the water to be treated will be determined
and the operating parameters required will be set.
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