Before Installation; Installation Regulations; Installation Requirements; Choice Of Location - Heatrae Sadia Multipoint ECO 30L H Installation, Operation And Maintenance Manual

5. Before installation

5.1 Installation regulations

WARNING
Installation of the appliance must be done
by a qualified Engineer in accordance with
prevailing and national regulations as listed
below.
Building Regulations G3
`
The Building Standards (Scotland)
`
The Building
`
Ireland)
I.E.E Electrical Regulations
`
UK Water 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.
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.
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).
The higher the available pressure and flow rate the
`
better the system performance.
The water heater has a maximum operating
`
pressure of 0.35MPa (3.5 bar) which is controlled
by the Pressure Reducing Valve (PRV).
The Pressure Reducing Valve can be connected
`
to a maximum mains pressure of 1.6MPa (16 bar).
Outlet/terminal fittings (taps, etc.)
The appliance can be used with most types of
`
terminal fittings.
Outlets situated higher than the water heater 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.
All fittings, pipework and connections must have a
`
rated pressure of at least 0.6 Mpa (6 bar) at 80°C.
Limitations
The appliance should not be used in association with any
of the following:
Ascending spray type bidets or any other class 1
`
back syphonage risk requiring that a type A air gap
be employed.
Regulations (Northern
Situations where maintenance is likely to be
`
neglected or safety devices tampered with.
Water supplies that have either inadequate
`
pressure or where the supply may be intermittent.
Situations where it is not possible to safely pipe
`
away any discharge from the safety valves.
In areas where the water consistently contains a
`
high proportion of solids, e.g. suspended matter
that could block the strainer,
filtration can be ensured.
In areas where the water supply contains chloride
`
levels that exceed 250mg/l.

5.3 Choice of location

The appliance must be horizontally wall mounted.
Although location is not critical, the following points should
be considered:
The appliance should be sited to ensure minimum
`
dead leg distances, particularly to the point of most
frequent use.
Avoid siting where extreme cold temperatures will
`
be experienced. All exposed pipe work should be
insulated.
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 (see page 12 for details)
Access to associated controls and immersion
`
heaters must be available for the servicing and
maintenance of the system.
Clearance to the left hand side of the appliance
`
should be at least 300 mm to allow removal of the
cover and immersion heater.
Ensure that the wall for the appliance is capable
`
of permanently supporting the weight when full of
water (see table 1, page 5 for weights).
The tundish should be installed away from any
`
electrical components.

5.4 Transport

Prior to installation the appliance should be stored and
transported in an upright position in its original 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.
unless adequate
9