1
General safety precautions
Installation and operating instructions
6
Gas Combi Unit
Floor-standing gas condensing boiler with integrated heat storage
008.1543899_02 – 04/2019 – EN
1.1.1
Observing the instructions
▪ The original documentation is written in German. All other lan-
guages are translations.
▪ Please read this manual carefully and thoroughly before proceed-
ing with the installation or modification of the heating system.
▪ The precautionary measures described in this document cover
very important topics. Follow them meticulously.
▪ The installation of the system, and all activities described in this
manual and the applicable documents for the installer must be
carried out by an approved installer.
This manual provides all the necessary information for installation,
commissioning and maintenance, as well as basic information on op-
eration and settings. Please see the attached documents for a de-
tailed description of operation and control.
All heating parameters needed for smooth operation are already
factory-set. Please refer to other relevant documents for information
on setting the control.
Relevant documents
▪ GCU compact:
▪ Operating instructions for the operator.
▪ Operating manual for the operator
▪ RoCon BF: Operating instructions.
▪ When additional components are connected; the associated in-
stallation and operating instructions.
The instructions are included in the scope of supply for the individual
devices.
1.1.2
Meaning of warnings and symbols
Warnings in this manual are classified according into their severity
and probability of occurrence.
DANGER
Indicates an immediate danger.
Disregarding this warning can lead to serious injury or
death
WARNING
Indicates a potentially dangerous situation
Disregarding this warning may result in serious physical in-
jury or death.
CAUTION
Indicates a situation which may cause possible damage
Disregarding this warning can cause damage to property
and the environment and result in minor injuries.
This symbol identifies user tips and particularly useful in-
formation, but not warnings or hazards
Special warning signs
Some types of danger are represented by special symbols.
Electric current
Danger of explosion
Risk of burns or scalds
Risk of poisoning
Validity
Some information in this manual has limited validity. The validity is
highlighted by a symbol.
Observe the specified tightening torque (see
Only applies to devices with unpressurised solar system
connection (DrainBack).
Only applies to devices with a bivalent solar system connec-
tion (Biv).
Handling instructions
1
Handling instructions are shown as a list. Actions where the se-
quential order must be maintained are numbered.
è
Results of actions are identified with an arrow.
1.2
Safety instructions for installation
and operation
1.2.1
General
WARNING
Heaters that have not been set up and installed correctly
can impair the function of the heater and/or cause serious
or fatal injuries to the user.
▪ Work on the GCU compact (such as set-up, inspection,
connection and initial commissioning) must only be car-
ried out by persons who are authorised and who have
successfully completed
qualifying technical or voca-
tional training
and who have taken part in advanced
training sessions recognised by the relevant authorities
responsible for the specific activity. These include, in
particular,
certified heating engineers, qualified elec-
tricians and HVAC specialists who,
, because of their
professional training
and their
expertise,
have experi-
ence with the professional installation and maintenance
of heating systems, gas installations and hot water stor-
age tanks.
▪ Switch off the external main switch before starting any
work on the GCU compact and secure it against uninten-
tional switch-on.
▪ Do not leave any tools or other objects below the hood
of the device after finishing installation or maintenance
work.
Avoiding danger
The GCU compact conforms to the state of the art and meets all re-
cognised technical requirements. However, improper use may result
in serious physical injuries or death as well as property damage. To
prevent such risks, only install and operate the devices:
▪ as stipulated and in perfect condition,
▪ with an awareness of safety and the dangers involved.
This assumes knowledge and use of the contents of this manual, the
relevant accident prevention regulations and the recognised safety-
related and occupational health rules.
Before working on the heating system
▪ Only authorised and trained heating technicians may work on the
heating system (such as installation, connection and initial com-
missioning).
▪ Switch off the main switch and secure it against unintended
switch-on when carrying out any work on the heating system.
▪ Seals must not be damaged or removed.
▪ Make sure that the safety valves comply with the requirements of
EN 12828 when connecting on the heating side and with the re-
quirements of EN 12897 when connecting on the domestic water
side.
Summary of Contents for GCU compact Series
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