Commissioning; Commissioning The Cylinder; Instructions For The User; Shutdown - Bosch Stora WS 300-5 PK Installation And Service Instructions For Contractors

6

Commissioning

DANGER
Danger of cylinder damage through positive pressure!
Positive pressure can result in stress cracks in the glass lining.
▶ Never close the discharge pipe of the pressure relief valve.
▶ Before connecting the cylinder, carry out a tightness test on the
water lines.
▶ Commission the wall mounted boiler, assemblies and accessories
according to the manufacturer's notices and the technical
documentation.
6.1

Commissioning the cylinder

▶ Before filling the cylinder:
purge the pipework and cylinder with potable water.
▶ Fill the cylinder whilst a DHW draw-off point is fully open, until water
flows steadily from it.
▶ Carry out tightness test.
Only perform the tightness test of the cylinder using potable water.
On the DHW side, the test pressure must not exceed 10 bar positive
pressure.
Setting the cylinder temperature
▶ Set the required cylinder temperature in accordance with the operating
instructions of the wall mounted boiler, taking the risk of scalding at the
DHW draw-off points into consideration ( Chapter 6.2).
6.2

Instructions for the user

WARNING
Risk of scalding at the DHW draw-off points!
Depending on the system and operating conditions (thermal
disinfection) there is a risk of scalding at the DHW draw-off points in
DHW mode.
Installation of a thermal mixer is prescribed when setting a DHW
temperature via 60 °C.
▶ Advise users that they should draw off only mixed water.
▶ Explain the operation and handling of the heating system and
cylinder, making a particular point of safety-relevant features.
▶ Explain the function and how to check the pressure relief valve.
▶ Hand all enclosed documents over to the user.
▶ Recommendation for the operator: Conclude a maintenance and
inspection contract with an approved contractor. Have the cylinder
serviced and inspected annually at the specified maintenance
intervals ( Tab. 8).
Highlight the following for the user:
▶ Setting the DHW temperature.
– Water may be discharged from the pressure relief valve when
heating-up.
– Always keep discharge pipe for pressure-relief valve open.
– Comply with maintenance intervals ( Tab. 8).
– Where there is a risk of frost and when the operator is briefly
away: Keep the heating system in operation and set the lowest
possible DHW temperature.
Stora – 6720821526 (2021/06)
7

Shutdown

▶ If an immersion heater has been installed (accessory), isolate the
cylinder from the power supply.
▶ Switch off the temperature controller at the control unit.
WARNING
Risk of scalding from hot water!
Hot water can cause serious burns.
▶ Allow the cylinder to cool down sufficiently.
▶ Drain the cylinder ( Fig. 23 / 24, page 74).
Use the nearest water taps to the cylinder for this.
▶ Decommission all assemblies and accessories of the heating system
according to the manufacturer's notes in the technical
documentation.
▶ Close the shut-off valves ( Fig. 25, page 74).
▶ Depressurise the heat exchanger.
▶ Drain and blow out the heat exchanger ( Fig. 26, page 74).
To prevent corrosion:
▶ Leave the cover of the inspection aperture open to allow the interior
to dry completely.
8

Environmental protection and disposal

Environmental protection is a fundamental corporate strategy of the
Bosch Group.
The quality of our products, their economy and environmental safety are
all of equal importance to us and all environmental protection legislation
and regulations are strictly observed.
We use the best possible technology and materials for protecting the
environment taking account of economic considerations.
Packaging
Where packaging is concerned, we participate in country-specific
recycling processes that ensure optimum recycling.
All of our packaging materials are environmentally compatible and can be
recycled.
Used appliances
Used appliances contain valuable materials that can be recycled.
The various assemblies can be easily dismantled. Synthetic materials are
marked accordingly. Assemblies can therefore be sorted by composition
and passed on for recycling or disposal.
Commissioning
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