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1
General safety precautions
1.1
Particular safety instructions
WARNING
Heaters that have not been set up and
installed correctly can impair the func-
tion of the heater and/or cause serious
or fatal injuries to the user.
▪ Work on the device (such as set-up,
servicing, connection and initial com-
missioning) must only be carried out
by persons who are authorised and
have successfully completed quali-
fying technical or vocational train-
ing and who have taken part in ad-
vanced training sessions recognised
by the relevant responsible authorit-
ies for the specific activity. These in-
clude, in particular, certified heating
engineers, qualified electricians
and HVAC specialists who, be-
cause of their professional training
and expert knowledge, have exper-
ience in the professional installation
and maintenance of heating sys-
tems, gas installations and hot water
storage tanks.
WARNING
Disregarding the following safety in-
structions may result in serious phys-
ical injury or death.
▪ This device may only be used by
children aged 8 and above and by
persons with restricted physical,
sensory or mental capabilities or with
a lack of experience and knowledge
if they are under supervision or if
they have been instructed in the safe
use of the equipment and under-
stand the dangers arising therefrom.
Children must not play with the
device. Cleaning and user mainten-
ance must not be carried out by
children without supervision.
Gas Combi Unit
Floor-standing gas condensing boiler with integrated heat storage
008.1543899_02 – 04/2019 – EN
1
General safety precautions
▪ Establish the power supply in ac-
cordance with IEC 60335-1, via a
separate isolator which separates all
poles with a contact opening dis-
tance that provides full disconnection
in accordance with overvoltage cat-
egory III.
▪ All the electrical work must only be
carried out by electrically qualified
experts and with consideration of the
local and national regulations, and
the instructions in this manual.
Ensure that a suitable electrical cir-
cuit is used.
Insufficient load capacity of the elec-
trical circuit or improperly executed
connections can result in electric
shock or fire.
▪ The customer must install a pressure
relief device with a rated over-pres-
sure of less than 0.6 MPa (6 bar).
The connected drain line must have
a continuous gradient and a free out-
let into a frost-free environment
(see Chap.
4.4).
▪ Water may drip out of the drain line
of the pressure relief device. The
drain opening must be left open to
atmosphere.
▪ The pressure relief device must be
operated regularly in order to re-
move scale deposits and to make
sure it is not blocked.
▪ The storage tank and hot water cir-
cuit can be drained. The instructions
in
Chap. 11.1
must be observed.
▪ All work on gas-carrying parts must
only be carried out by gas-related
qualified experts and with considera-
tion of local and national regulations
and the instructions in this manual.
▪ Improperly performed work on gas or
gas-carrying lines can endanger life
and health and hinder the operation
of the heater.
Installation and operating instructions
5
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