Transport; Installation; Siting; Installation Site Requirements - Buderus SU200.5 E Installation And Maintenance Instructions Manual

4

Transport

▶ When handling, prevent DHW cylinders from falling.
▶ Move packed DHW cylinder with a sack trolley and strap ( Fig. 4,
page 67).
-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 9, page 65) and
minimum wall clearances inside the installation room
( Fig. 6, page 67).
5.1.2

Positioning the DHW cylinder

▶ Stand the DHW cylinder upright and level it ( Fig. 7 to Fig. 8,
page 67).
▶ Apply Teflon tape or Teflon string ( Fig. 9, page 68).
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.
SU120.5 | SU160.5 | SU200.5 | SU200.5 E – 6 720 819 283 (2022/03)
5.2.1

Connecting the DHW cylinder on the water side

System example with all recommended valves and stopcocks
( Fig. 10, page 68).
▶ 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.
▶ Keep primary lines as short as possible and insulate them.
▶ If using a non-return valve in the cold water supply: Install a safety
valve between the non-return valve and the cold water inlet.
▶ Install a pressure reducer if the static system pressure is in excess of
5 bar.
▶ Seal all superfluous connections.
5.2.2

Installing a safety valve (on-site)

▶ Install a type-tested safety valve that is approved for potable water
( DN 20) in the cold water supply ( Fig. 10, page 68).
▶ Observe the safety valve installation instructions.
▶ Terminate the discharge pipe where it will be easily visible in the
frost-protected area above a drain.
– The discharge pipe must be at least equal to the outlet cross-
section of the safety valve.
– The discharge pipe must be able to discharge at least the flow rate
that is feasible at the cold water inlet ( Table 4, page 39).
▶ Attach a notice with the following text to the safety valve: "Never
close the discharge pipe. During heating, water may be discharged
for operational reasons."
If the static system pressure exceeds 80 % of the safety valve response
pressure:
▶ Install a pressure reducer upstream ( Fig. 10, page 68).
Mains pressure Safety valve response
(static pressure) pressure
 6 bar
< 4.8 bar
5 bar 6 bar
 8 bar
5 bar
 8 bar
6 bar
7.8 bar 10 bar
Table 7 Selection of a suitable pressure reducer
5.3

Installing the DHW temperature sensor

Fit one DHW temperature sensor respectively at test port [7] (for the
solar thermal system) and [3] (for the heat source) for capturing and
monitoring the DHW temperature at the DHW cylinder
( Fig. 3, page 66).
▶ Install the DHW temperature sensor ( Fig. 11, page 69). Ensure
that the sensor area has contact with the sensor well surface area
over its full length.
5.4

Immersion heater (accessory, only for SU200.5 E)

▶ Install the immersion heater in accordance with the separate
installation instructions.
▶ When installation of the cylinder is complete, inspect the earth
conductor (including metal connection fittings).
Transport 4
Pressure reducer
in the EU outside the EU
Not required
max. 4.8 bar
Not required
max. 5.0 bar Not required
max. 5.0 bar Not required
41