Heatrae Sadia 7037042, Инструкция по установке, эксплуатации и обслуживанию

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5. Before installation
5.1 Installation regulations
5.2 Installation requirements
Water supply
In an unvented system the pressure and flowrate is
directly related to the incoming water supply. For this
reason it is recommended that the maximum water
demand is assessed and the water supply checked to
ensure this demand can be satisfactorily met.
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We suggest the minimum supply requirements
should be 0.08MPa (0.8 bar) pressure and 20 litres
per minute flow rate. However, at these values
outlet flow rates may be poor if several outlets are
used simultaneously.
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A 22mm cold water supply is recommended,
however, if a 15mm (1/2”) supply exists, which
provides sufficient flow, this may be used (although
more flow noise may be experienced).
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The higher the available pressure and flow rate the
better the system performance.
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The appliance has a maximum operating pressure
of 0.35MPa (3.5 bar) which is controlled by the
Pressure Reducing Valve (PRV).
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The Pressure Reducing Valve can be connected
to a maximum mains pressure of 1.6MPa (16 bar).
Outlet/terminal fittings (taps, etc.)
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The water heater can be used with most types of
terminal fittings.
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Outlets situated higher than the appliance will give
outlet pressures lower than that at the heater, a
10m height difference will result in a 1 bar pressure
reduction at the outlet.
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All fittings, pipework and connections must have a
rated pressure of at least 0.6 Mpa (0.6 Mpa (6 bar))
at 80°C.
Limitations
The appliance should not be used in association with
any of the following:
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Ascending spray type bidets or any other class 1
back syphonage risk requiring that a type A air gap
be employed.
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Situations where maintenance is likely to be
neglected or safety devices tampered with.
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Water supplies that have either inadequate
pressure or where the supply may be intermittent.
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Situations where it is not possible to safely pipe
away any discharge from the safety valves.
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In areas where the water consistently contains a
high proportion of solids, e.g. suspended matter
that could block the strainer, unless adequate
filtration can be ensured.
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In areas where the water supply contains chloride
levels that exceed 250mg/l.
5.3 Choice of location
The appliance must be vertically wall mounted.
Although location is not critical, the following points
should be considered:
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The appliance should be sited to ensure minimum
dead leg distances, particularly to the point of most
frequent use.
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Avoid siting where extreme cold temperatures will
be experienced. All exposed pipe work should be
insulated.
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The discharge pipework from the safety valves
must have minimum fall of 1:200 from the appliance
and terminate in a safe and visible position as per
G3 requirements.
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Access to associated controls and immersion
heaters must be available for the servicing and
maintenance of the system.
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Clearance under the water heater should be at
least 300 mm to allow removal of the cover and
immersion heater.
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Ensure that the wall the appliance is to be mounted
on is capable of permanently supporting the weight
when full of water (see table 1, page 5 for weights).
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The tundish should be installed away from any
electrical components.
5.4 Transport
Prior to installation the appliance should be transported
and stored in an upright position in its orignal packaging
in a dry area free from excessive damp, humidity or
frost.
Please take care when handling a packaged appliance.
The units are heavy and must only be moved manually
using safe working practices. The package weights
are displayed on the carton label. Once the packaging
has been removed decide on a safe lifting method for
the appliance again taking note of the weights noted in
table 1, page 5. DO NOT use the Temperature/Pressure
Relief Valve to lift or manoeuvre the appliance.
WARNING
Installation of the appliance must be done
by a qualified engineer in accordance with
prevailing and national regulations as listed
below.
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Building Regulations G3
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The Building Standards (Scotland)
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The Building Regulations (Northern
Ireland)
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I.E.E Electrical Regulations
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UK Water Regulations