Vaillant uniSTOR VIH RW GB 500 BES Operating Instructions Manual page 4

1.2.3 Risk of death due to
changes
to the product or the
product environment
▶ Never remove, bridge or
block the safety devices.
▶ Do not tamper with any of the
safety devices.
▶ Do not damage or remove
any tamper-proof seals on
components.
▶ Do not make any changes:
– The product itself
– The water and electricity
supply lines
– to the expansion relief valve
– to the drain pipework
– to constructional condi-
tions that may affect the
operational reliability of the
product
1.2.4 Risk of injury and
material damage due to
maintenance and repairs
carried out incorrectly or
not carried out at all
▶ Never attempt to carry out
maintenance work or repairs
on your product yourself.
▶ Faults and damage should be
immediately eliminated by a
competent person.
▶ Adhere to the maintenance
intervals specified.
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1.2.5 Risk of burns or scalding
caused by hot parts
Parts of the product become hot
during operation.
▶ Only touch the product and its
parts once these have cooled
down.
1.2.6 Risk of material damage
caused by frost
▶ Ensure that the heating in-
stallation always remains in
operation during freezing con-
ditions and that all rooms are
sufficiently heated.
▶ If you cannot ensure the oper-
ation, have a competent per-
son drain the heating installa-
tion.
Operating instructions 0020235302_03