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5833 275 - 04
Vitotrans 300 Installation, Operating and Service
Safety Instructions
Service
Target group
These instructions are intended exclusively for qualified
contractors.
■
Work on gas installations must only be carried out
by a licensed professional heating contractor.
■
Work on electrical equipment must only be carried
out by a qualified electrician.
■
The system must be commissioned by the system
installer or a qualified person authorized by the installer.
■
This appliance has not been designed to be operated
by individuals other than those qualified and trained.
Regulations
Observe the following when working on this system:
■
Statutory regulations regarding the prevention of accidents
■
Statutory regulations regarding environmental protection
■
Codes of practice of the relevant trade associations.
Auxiliary components, spare and wearing parts
Note:
Spare and wearing parts that have not been tested
together with the system can compromise its function.
Installing non-authorized components and making
non-approved modifications or conversions can
compromise safety and may invalidate our warranty.
For replacements, use only original spare parts
supplied or approved by Viessmann.
Note:
Electronic assemblies can be damaged by
electrostatic discharges. Before beginning work,
touch grounded objects, such as heating or water
pipes, to discharge static loads.
Repair work
Note:
Repairing components that fulfil a safety function
can compromise the safe operation of your system.
Replace faulty components only with original
Viessmann spare parts.
Working on the system
■
Where gas is used as the fuel, close the main gas
shut-off valve and safeguard it against unintentional
reopening.
■
Isolate the system from the power supply (e.g. at the
separate fuse or a main switch) and check that it is
de-energized.
■
Safeguard the system against reconnection.
Checking the high limit safety cut-out setting
The high limit safety cut-out is preset to 210°F (99°C).
