Vaillant VEN 5 plus, Инструкция по использованию и установке

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Operating instructions for electric domestic hot water cylinders VEN 5/6 U and O (plus) 0020129648_02
19
Care 9
Inspection and maintenance 10
9 Care
Your Vaillant electric domestic hot water cylinder is easy
to care for because all internal parts are protected
against dirt and moisture.
>
Clean the casing of the electric domestic hot water
cylinder using a damp cloth and some soap. Do not
use any scouring or cleaning agents that could dam-
age the casing or temperature selector.
10 Inspection and maintenance
Safety instructions for the operator:
a
Danger!
Risk of injury and material damage due to
improper maintenance and repair.
If maintenance is not carried out, or carried
out incorrectly, this may adversely affect the
operating reliability of your domestic hot
water cylinder.
>
Never attempt to perform maintenance
work or repairs on the electric domestic
hot water cylinder yourself
.
>
Always employ an approved heating engi-
neer to carry out inspections and mainte-
nance work.
b
Caution!
Possible material damage to the unit due
to lack of maintenance.
A lack of maintenance can affect the func-
tional safety of the electric domestic hot
water cylinder. e.g. unit defects caused by
limescale formation. In areas of hard
water (more than 14 °dH = 2.5 CaCO
3
mmol/l)
or very hard water (more than 20 °dH =
3.6 CaCO
3
mmol/l), a significantly more fre-
quent maintenance interval may be required.
>
Have the electric domestic hot water cylin-
der inspected at least every 3 years by an
approved heating engineer.
>
If you live in an area of very hard water,
Vaillant recommends that you have the
maintenance service carried out once a
year.
>
Ensure that only an approved heating engi-
neer carries out maintenance and repair
work.
Safety instructions for the heating engineer:
a
Danger!
Risk of death from electric shock!
Live lines and connections may cause a
potentially lethal electric shock.
>
Unplug the mains plug before you open
the unit.
b
Caution!
Possible water damage.
During maintenance work, water may escape
from the opened VEN.
>
Capture the residual water left inside the
VEN using a suitable container.
INT
EN