Transport; Assembly; Installation; Requirements For Installation Location - Bosch W 120-5 P Series Installation And Maintenance Instructions For The Contractor

4

Transport

▶ Secure the DHW cylinder during transportation to prevent it from
falling.
▶ Move packed DHW cylinder with a sack trolley and lashing strap
( Fig. 4, page 61).
-or-
▶ Move unpacked DHW cylinder with a transport net; during handling,
protect connections against possible damage.
5

Assembly

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

Installation

5.1.1

Requirements for 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.
▶ Place the DHW cylinder on a plinth if there is a risk of water collecting
at the installation location.
▶ The installation site must be a dry and frost-free room.
▶ Observe minimum room height ( Tab. 9, page 59) and minimum
wall clearance at installation location ( Fig. 6, page 61).
5.1.2

Positioning the DHW cylinder

▶ Stand the DHW cylinder upright and level it ( Fig. 7 to Fig. 8,
page 62).
▶ Apply Teflon tape or Teflon string ( Fig. 9, page 62).
5.2

Hydraulic connections

WARNING: Risk of fire from 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 jacket for damage after completing
work.
WARNING: Risk of injury from 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.
W 120-5 P | W 160-5 P | W 200-5 P | W 200-5 EP – 6 720 821 084 (2018/10)
5.2.1

Connecting the DHW cylinder on the water side

System schematics with all recommended valves and taps ( Fig. 10,
page 62).
▶ Use installation material that is heat-resistant to 160 °C (320 °F).
▶ Never use open, vented expansion vessels.
▶ Use metal connection fittings in potable water heating systems with
plastic lines.
▶ Size the drain line in accordance with the connection.
▶ To facilitate debris removal, never install elbows 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 pressure
relief valve between the non-return valve and cold water inlet.
▶ Install a pressure reducer if the static system pressure is in excess of
5 bar.
▶ Seal all unused connections.
5.2.2

Install a pressure relief valve (provided by the customer)

▶ Install a type-tested pressure relief valve on site that is approved for
potable water (DN 20) in the cold water supply ( Fig. 10,
page 62).
▶ Observe the pressure relief valve installation instructions.
▶ Terminate the discharge pipe of the pressure relief valve where it will
be easily visible in the frost-proof area via a dewatering point.
– The discharge pipe must be at least equal to the outlet cross-
section of the pressure relief valve.
– The discharge pipe must be able to discharge at least the flow rate
that could possibly arise at the cold water inlet ( Tab. 4,
page 33).
▶ Attach a notice with the following text to the pressure relief valve:
"Never close the discharge pipe. During heating, water may be
discharged for operational reasons."
If the static system pressure exceeds 80 % of the pressure relief valve
excess pressure:
▶ Install a pressure reducer upstream ( Fig. 10, page 62).
Gas supply Pressure relief
pressure (static valve excess
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 hot water temperature sensor

Install the hot water temperature sensor at the test point [7] to measure
and monitor the DHW temperature in the DHW cylinder
( Fig. 3 page 60).
▶ Install the hot water temperature sensor ( Fig. 11, page 63).
Ensure that the sensor surface has contact with the sensor pocket
surface over its full length.
5.4

Immersion heater (accessory, only for W 200-5 EP)

▶ Install the immersion heater in accordance with the separate
installation instructions.
▶ When installation of the cylinder is complete, inspect the ground
conductor (including metal connection fittings).
Transport
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
35