Buderus SM400/5E, Installation And Maintenance Instructions Manual

Page: 22 / 116

3 Regulations
SU300/5 | SU400/5 – 6 720 800 019 (2015/04) 22
2.5 Product description
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
• 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... .
4 Transport
▶ When handling, prevent DHW cylinders from falling.
▶ Move packed DHW cylinder with a sack trolley and strap (

Fig. 4,
page 106).
-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
▶ 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 4, page 21) and
minimum wall clearances inside the installation room
(

Fig. 6, page 106).
5.1.2 Positioning the DHW cylinder
▶ Stand the DHW cylinder upright and level it (

Fig. 6 to Fig. 8,
page 107).
▶ Remove protective caps (

Fig. 9, page 107).
▶ Apply Teflon tape or Teflon string (

Fig. 10, page 107).
Continuous output (at 80 °C flow temperature, 45 °C DHW outlet temperature and 10 °C cold water
temperature) kW
l/min 36,5
897 56
1376
Heat-up time at rated output min 12 19
Maximum heat input
5)
kW 36,5 56
Maximum heating water temperature °C 160 160
Max. heating water operating pressure bar (positive) 16 16
Connection size, heating water DN R1" R1"
Pressure loss diagram

Fig.
2
, page
105
1) Without solar heating or reheating; selected cylinder temperature 60 °C
2) Mixed water at the draw-off point (at 10 °C cold water temperature)
3) Distribution losses outside the buffer cylinder are not taken into account.
4) The performance factor NL=1 to DIN 4708 for 3.5 occupants, standard bath tub and kitchen sink. Temperatures: cylinder 60 °C, outlet 45 °C and cold water 10 °C. Measured
at max. heat input. The N
L
drops with reduced heat input.
5) Limit to the stated value for heat sources with higher heat input.
Unit SM300/5 SM400/5(E)
Table 4 Dimensions and specification (

Fig. 1, page 104 and Fig. 3, page 105)
Pos. Description
1 DHW outlet
2 Cylinder flow
3 Sensor well for temperature sensor, heat source
4 DHW circulation connection
5 Cylinder return
6 Cold water inlet
7 Inspection apertures for service and cleaning at the front
8 Indirect coil for reheating by the boiler, enamelled smooth tube
9 Cylinder, enamelled steel
10 Fitted magnesium anode without electrical insulation
11 PS casing lid
12 Casing, painted sheet metal with rigid polyurethane foam
insulation, 50 mm
Table 5 Product description (

Fig. 3, page 105 and Fig. 11,
page 108)
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.