Product Description; Regulations; Transport; Installation - Buderus SM290/5 Installations- Und Wartungsanleitung Für Den Fachhandwerker

2.5

Product description

Pos. Description
1 DHW outlet
2 Cylinder flow
3 Sensor well for temperature sensor, heat source
4 DHW circulation connection
5 Cylinder return
6 Solar flow
7 Sensor well for temperature sensor, solar
8 Solar return
9 Cold water inlet
10 Lower indirect coil for solar heating, enamelled smooth
tube
11 Inspection apertures for service and cleaning at the front
12 Models SM290/5E and SM400/5E with female connection
(Rp 1 ½") for installing one immersion heater
13 Upper indirect coil for reheating by the boiler, enamelled
smooth tube
14 Cylinder, enamelled steel
15 Fitted magnesium anode without electrical insulation
16 PS casing lid
17 Casing, painted sheet metal with rigid polyurethane foam
insulation, 50 mm
Table 33 Product description (
page 114)
3

Regulations

Observe the following directives and standards:
• Local regulations
• EnEG (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 through enamel coating; requirements and testing (product
standard)
– DIN 4753-6 – Water heating systems ...; cathodic corrosion
protection for enamelled steel cylinders; requirements and testing
(product standard)
– DIN 4753-8 – Water heaters ... , part 8: Thermal insulation of DHW
cylinders up to 1000 l nominal capacity – requirements and testing
(product standard)
– DIN EN 12897 – Water supply - regulation for ... DHW cylinders
(product standard)
– DIN 1988 – Technical rules for potable water installations
– DIN EN 1717 – Protection of potable water against contamination
...
– DIN EN 806 – Technical rules for potable water installations
– DIN 4708 – Central DHW heating systems
– EN 12975 – Solar thermal systems and their components
(collectors).
• DVGW
– Code of practice W 551 – Potable water heating systems and
pipework; technical measures to inhibit the growth of legionella
bacteria in new systems; ...
– Code of Practice W 553 – Sizing DHW circulation systems ... .
SM290/2 5 | SM300/5 | SM400/5 | SM290/5E | SM400/5E – 6 720 800 023 (2013/01)

Fig. 4, page 112 and Fig. 12,
4

Transport

▶ When handling, prevent DHW cylinders from falling.
▶ Move packed DHW cylinder with a sack trolley and strap ( Fig. 5,
page 112).
-or-
▶ Move unpacked DHW cylinder with a transport net; during handling,
protect connections against possible damage.
5

Installation

The DHW cylinder is delivered as a fully assembled unit.
▶ Check that the DHW cylinder is complete and undamaged.
5.1

Siting

5.1.1 Installation site requirements

NOTICE: System damage through inadequate load
bearing capacity of the supporting surface or unsuitable
substrate.
▶ Ensure that the installation area is level and offers
sufficient load-bearing capacity.
▶ Site the DHW cylinder on a plinth if there is a risk that water may
collect at the installation site.
▶ Site the DHW cylinder in dry internal areas that are free from the risk
of frost.
▶ Observe the minimum room height ( Table 32, page 30) and
minimum wall clearances inside the installation room
( Fig. 7, page 113).

5.1.2 Positioning the DHW cylinder

▶ Stand the DHW cylinder upright and level it ( Fig. 7 to Fig. 9,
page 113).
▶ Remove protective caps ( Fig. 10, page 113).
▶ Apply Teflon tape or Teflon string ( Fig. 11, page 114).
5.2

Hydraulic connection

WARNING: Risk of fire through soldering and welding!
▶ Take appropriate safety measures when soldering
and welding as the thermal insulation is flammable.
For example, cover up the thermal insulation.
▶ Check cylinder casing after completion for perfect
condition.
WARNING: Risk to health through contaminated water!
Work carried out without due care for cleanliness
contaminates the potable water.
▶ Install and equip the DHW cylinder hygienically in
accordance with national standards and guidelines.

5.2.1 Connecting the DHW cylinder on the water side

System example with all recommended valves and stopcocks
( Fig. 12, page 114).
▶ Use installation material that is heat-resistant to 160 °C (320 °F).
▶ Never use open vented expansion vessels.
▶ Use metal connection fittings in DHW heating systems with plastic
lines.
▶ Size the drain line in accordance with the connection.
▶ To facilitate blow-down, never install bends in the drain line.
Regulations 3
31