Commissioning; Commissioning The Dhw Cylinder; Instructions For The User; Shutdown - Bosch W 300-5 P Notice D'installation Et D'entretien

Commissioning

6 Commissioning
NOTICE: System damage due to positive pressure!
Positive pressure can result in stress cracks in the glass
lining.
▶ Never close the discharge pipe of the pressure relief
valve.
▶ Commission all assemblies and accessories as specified in the
manufacturer's technical documentation.
Use only potable water to test the tightness of the DHW
cylinder.
6.1

Commissioning the DHW cylinder

Use only potable water to test the tightness of the DHW
cylinder.
On the DHW side, the test pressure must not exceed 10 bar (150 psi)
positive pressure.
▶ Flush the DHW cylinder and pipework thoroughly prior to
commissioning ( Fig. 14, page 61).
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, page 31).
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, page 31).
– 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.
30
7

Shutdown

▶ If an immersion heater has been installed (accessory), isolate the
DHW cylinder from the power supply ( Fig. 16, page 61).
▶ Switch off the temperature controller at the control unit.
WARNING: Risk of scalding from hot water!
▶ Let the DHW cylinder cool down sufficiently.
▶ Drain the DHW cylinder ( Fig. 16 and 17, page 61).
▶ Decommission all assemblies and accessories of the heating system
as specified in the manufacturer's technical documentation.
▶ Close the shut-off valves ( Fig. 18, page 62).
▶ Depressurise the heat exchanger.
▶ Drain and blow out the heat exchanger ( Fig. 19, page 62).
▶ To prevent corrosion, dry out the inner space and keep the
inspection aperture covers open.
8

Environment/disposal

Environmental protection is a fundamental principle of the
Bosch Group.
Quality of products, efficiency and environmental protection are equally
important objectives for us. Environmental protection laws and
regulations are strictly adhered to.
Packaging
For the packaging, we participate in the country-specific recycling
systems, which guarantee optimal recycling. All of our packaging
materials are environmentally friendly and recyclable.
Used appliances
Old appliances contain materials that must be recycled.
The relevant assemblies are easy to separate, and all plastics are
identified. This allows the various assemblies to be sorted for
appropriate recycling or disposal.
W 300-5 P – 6 720 821 103 (2021/05)