Bosch 7735500292, Installation And Maintenance Instructions For The Contractor

Page: 30 / 80

30 | Environment/disposal
W 500-5X... | W 750-5X... | W 1000-5X... 6 720 820 733 (2017/09)
Visual check
▶ Shut off the cold water inlet.
▶ Depressurize the DHW cylinder (

Fig. 24, page 73).
▶ Remove and check the magnesium anode (

Fig. 33, page 75 and
Fig. 34, page 76).
If the diameter is < 15 mm:
▶ Replace the magnesium anode (

Fig. 34, page 76).
▶ Check the transfer resistance between the earth connection and the
magnesium anode.
8 Environment/disposal
Environmental protection is a key commitment of the Bosch Group.
Quality of products, efficiency and environmental protection are equally
important objectives for us. Environmental protection laws and
regulations are strictly observed.
To protect the environment, we use the best possible technology and
materials while taking into account economic considerations.
Packaging
Where packaging is concerned, we participate in country-specific
recycling systems that ensure optimum recycling.
All of our packaging materials are environmentally compatible and can
be recycled.
Used appliances
Old appliances contain materials that must be recycled.
The relevant assemblies are easy to separate and all plastics are marked.
In this way the individual assemblies can be easily sorted and directed to
recycling or disposal.
9 Shutdown
▶ If an immersion heater has been installed (accessory), isolate the
DHW cylinder from the power supply.
▶ Switch off the temperature controller at the control unit.
▶ Drain the DHW cylinder (

Fig. 25, page 73).
▶ Shut down all the assemblies and accessories of the heating system
as specified in the manufacturer's technical documents.
▶ Close the shut-off valves (

Fig. 26, page 74 and Fig. 26, page 74).
▶ Depressurize the upper and lower indirect coils.
▶ Drain and blow out the upper and lower heat exchangers
(

Fig. 27, page 74).
To prevent corrosion:
▶ Leave the cover of the inspection port open, so that the interior can
dry out well.
Item Description
1 Red cable
2 Screw for ground wire
3 Hand-hole cover
4 Magnesium anode
5 Thread
6 Ground wiring
7 Black cable
Table 9 Testing with the anode tester (

Fig. 32, page 75)
Never bring the surface of the magnesium anode into
contact with oil or grease.
▶ Keep everything clean.
WARNING: Risk of scalding from hot water.
▶ Let the DHW cylinder cool down sufficiently.