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7.2
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 above 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.
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 ( Chapter 10.3).
– 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.
8
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. 17 / 16, page 69).
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. 17, page 69).
▶ Depressurise the heat exchanger.
▶ Drain and blow out the heat exchanger ( Fig. 18, page 69).
To prevent corrosion:
▶ Leave the cover of the inspection aperture open to allow the interior
to dry completely.
9
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.
Stora – 6721839992 (2022/07)
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.
10
Inspection and maintenance
WARNING
Risk of scalding from hot water!
Hot water can cause serious burns.
▶ Allow the cylinder to cool down sufficiently.
▶ Allow the cylinder to cool down sufficiently before carrying out any
maintenance.
▶ Carry out cleaning and maintenance procedures in the specified
intervals.
▶ Remedy all faults immediately.
▶ Only use genuine spare parts!
10.1
Inspection
An inspection/check of the cylinders must be carried out every 2 months
in accordance with DIN EN 806-5. During this the set temperature
should be checked and compared with the actual temperature of the
heated water.
10.2
Maintenance
Annual maintenance should be carried out in accordance with
DIN EN 806-5, Appendix A, tab. A1, line 42.
This includes the following work:
• Function check of the pressure-relief valve
• Tightness test of all connections
• Cleaning of the cylinder
• Checking of the anode
10.3
Maintenance intervals
The maintenance to be carried out depends on the flow rate, operating
temperature and water hardness ( Tab. 8). We recommend the
maintenance intervals specified in tab. 8 which are based on many years
of experience.
The use of chlorinated potable water or a water softener unit reduces the
maintenance intervals.
You can check the water quality with your water supply utility.
Depending on the composition of the water, it can make sense to deviate
from the reference values listed.
Water hardness [°dH]
Calcium carbonate
concentration CaCO
[mol/m3]
3
Temperatures
At a normal flow rate (< cylinder content/24 h)
< 60 °C
60...70 °C
> 70 °C
At an increased flow rate (> cylinder content/24 h)
< 60 °C
60...70 °C
> 70 °C
Table 8 Maintenance intervals in months
Shutdown
3...8.4
8.5...14
> 14
0.6...1.5
1.6...2.5
> 2.5
Months
24
21
15
21
18
12
15
12
6
21
18
12
18
15
9
12
9
6
47
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