Bosch 7735500278, Installation And Maintenance Instructions Manual

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Environmental protection/disposal | 21
6 720 810 364 (2015/05) W 500-1000-5... | WS 500-1000-5 E... | WS 400-1000-5 EL...
If the anode current is < 0.3 mA:
▶ Replace the magnesium anode.
Visual check
▶ Shut off the cold water inlet.
▶ Depressurize the DHW cylinder (

Fig. 28, page 111).
▶ Remove and check the magnesium anode (

Fig. 37, page 114 and
Fig. 38, page 114).
If the diameter is < 15 mm:
▶ Replace the magnesium anode (

Fig. 39, page 114).
▶ Check the transfer resistance between the earth connection and the
magnesium anode.
8 Environmental protection/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 optimal recycling.
All of our packaging materials are environmentally compatible and can
be recycled.
Old appliance
Old appliances contain materials that must be recycled.
The relevant assemblies are easy to separate, and all plastics are
identified. 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. 27 and 28, page 111).
▶ 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. 29, page 112 and
Fig. 30, page 112).
▶ Depressurize the upper and lower indirect coils.
▶ Drain and blow out the upper and lower heat exchangers
(

Fig. 31, page 112).
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 wire
7 Black cable
Table 10 Testing with the anode tester (

Fig. 36, page 113)
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.