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Regulations
Observe the following guidelines and standards:
• Local regulations
• EnEG (Building Regulations) (in Germany)
• EnEV (in Germany)
Installation of, and equipment for, heating and water heating systems:
• DIN and EN standards
– DIN 4753-1 – Water heaters ...; requirements, identification,
equipment and testing
– DIN 4753-3 – Water heaters ...; corrosion protection on the
water side with glass lining; requirements and testing
(product standard)
– DIN 4753-7 – Water heaters, containers with a volume up to
1000 l, manufacturing, thermal insulation and corrosion
protection requirements
– DIN EN 12897 – Water supply - regulation for ... DHW cylinders
(product standard)
– DIN 1988-100 – Technical rules for potable water installations
– DIN EN 1717 – Protection of potable water against pollution ...
– DIN EN 806-5 – Technical rules for potable water installations
– DIN 4708 – Central water heating systems
• DVGW
– Code of Practise W 551 – Potable water heating systems and
pipework; technical measures to inhibit the growth of legionella
bacteria in new systems; ...
– Code of Practise W 553 – Sizing DHW circulation systems ...
Product data for energy consumption
• EU Regulation and Directives
– EU Regulation 2017/1369
– EU Regulation 811/2013 and 812/2013
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Transport
WARNING
Risk of injury from carrying heavy loads and inadequately securing
loads for transport!
▶ Use suitable means of transport.
▶ Secure the cylinder to prevent it falling.
▶ Move packed cylinder with a sack truck and lashing strap
( Fig. 5, page 59).
-or-
▶ Move unpacked cylinder with a transport net, during handling,
protect connections against possible damage.
Stora – 6721835341 (2021/04)
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Mounting method
5.1
Installation location
NOTICE
Risk of damage from inadequate load-bearing capacity of the
installation surface or unsuitable floor surface!
▶ Ensure that the installation surface is level and offers sufficient load-
bearing capacity.
▶ Install the cylinder in a dry frost-free interior.
▶ If there is any danger of water accumulating on the floor of the
installation location: place the cylinder on a plinth.
▶ Observe the minimum wall clearances inside the installation room
( Fig. 6, page 59).
▶ Align the cylinder vertically with the adjustable feet.
5.2
Installation
Preventing heat loss through natural circulation:
▶ Install non-return valves in all cylinder circuits.
-or-
▶ Connect pipework directly to the cylinder connections so that natural
circulation is prevented.
▶ Install connecting pipework free of stress.
5.2.1
Circulation
Connecting a DHW circulation line:
▶ Install a DHW circulation pump which is approved for potable water
and a non-return valve.
A DHW circulation line is not connected:
▶ Seal and insulate connection.
Circulation is only permitted with reference to the heat losses
during cooling with a time- and/or temperature-dependent DHW
circulation pump.
Size the DHW circulation line in accordance with DVGW Code of Practice
W 553. Observe special requirement according to DVGW W 511:
• Maximum temperature drop 5 K
To easily maintain the maximum temperature drop:
▶ Install a control valve with thermometer.
5.2.2
Connection on the heat source side
▶ Connect the flow at the top and the return at the bottom to the heat
exchanger.
▶ Keep primary lines as short as possible and insulate well. This
prevents unnecessary pressure losses and cooling down of the
cylinder due to water circulating through the pipework or similar.
▶ Provide effective ventilation (e.g. bleeding device) at the highest
point between the cylinder and wall mounted boiler to prevent faults
due to air locks.
▶ Install drain valve in the primary line.
It must be possible to drain the heat exchanger via this line.
Regulations
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