Viessmann VITOCELL 300-B Service Instructions Manual page 2

Safety instructions
Safety instructions
Please follow these safety instructions closely to
prevent accidents and material losses.
Safety instructions explained
Danger
This symbol warns against the risk of injury.
!
Please note
This symbol warns against the risk of material
losses and environmental pollution.
Target group
These instructions are exclusively intended for quali-
fied contractors.
Regulations to be observed
National installation regulations
■
■ Statutory regulations for the prevention of accidents
■ Statutory regulations for environmental protection
■ Codes of practice of the relevant trade associations
■ All relevant safety regulations as defined by DIN, EN,
DVGW, VDE and locally applicable standards
ÖNORM, EN and ÖVE
a
SEV, SUVA, SVTI, SWKI and SVGW
c
Working on the system
■ Isolate the system from the power supply (e.g. by
removing the separate fuse or by means of a mains
isolator) and check that it is no longer live.
Safeguard the system against reconnection.
■
!
Please note
Electronic assemblies can be damaged by elec-
trostatic discharge.
Prior to commencing any work, touch earthed
objects such as heating or water pipes to dis-
charge static loads.
Repair work
!
Please note
Repairing components that fulfil a safety func-
tion can compromise the safe operation of the
system.
Replace faulty components only with genuine
Viessmann spare parts.
2
Note
Details identified by the word "Note" contain additional
information.
■ Work on electrical equipment may only be carried
out by a qualified electrician.
■ The system must be commissioned by the system
installer or a qualified person authorised by the
installer.
Danger
Hot surfaces can cause burns.
■ Before maintenance and service work, switch
OFF the appliance and let it cool down.
Never touch the hot surfaces of uninsulated
■
pipes and fittings.