iNSTallaTiON
maintenance
www.stiebel-eltron.com
HSBB 200 S (GB) |
17
15. Maintenance
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with relevant regulations.
WARNING Electrocution
Before any work on the appliance, disconnect all poles
of the appliance from the power supply.
Draining the DHW cylinder
CAUTION Burns
Hot water may escape during draining.
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Close the shut-off valve in the cold water inlet line.
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Open the hot water taps on all draw-off points.
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Drain the DHW cylinder via the "cold water inlet" connection.
Draining the heat exchanger
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3
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Drain the heat exchanger via the drain valve.
Checking the DHW cylinder
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Inspect the appliance via the control aperture (see chapter
"Specification / Dimensions and connections").
Checking / replacing the protective anode
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Check the protective anode after the first two years of use
and replace if necessary. Check that the maximum transition
resistance between the protective anode and the cylinder is
0.3 Ω. If it is not possible to insert a rod anode from above,
install a segmented anode.
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Decide the intervals in which further checks should be car-
ried out.
Checking the diaphragm expansion vessel
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6
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Remove the protective cap of the fill valve on the diaphragm
expansion vessel.
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8
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Shut off the diaphragm expansion vessel from the system at
the cap valve.
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Drain the diaphragm expansion vessel at the drain valve of
the cap valve.
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Check the pre-charge pressure of the diaphragm expansion
vessel using a pressure gauge.
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Refit the protective cap to the fill valve.
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Unblock the diaphragm expansion vessel at the cap valve. If
required, re-seal the aperture.
