Viessmann Vitocal 300-G Series Installation And 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 author-
ised contractors.
Regulations to be observed
■ National installation regulations
■ Statutory regulations for the prevention of accidents
■ Statutory regulations for the protection of the envi-
ronment
Safety instructions for working on the system
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.
Note
In addition to the control circuit there may be several
power circuits.
Danger
Contact with live components can result in
severe injuries. Some components on PCBs
remain live even after the power supply has
been switched off.
Prior to removing covers from the appliances,
wait at least 4 minutes until the voltage has
completely dropped out.
Safeguard the system against reconnection.
■
Wear suitable personal protective equipment when
■
carrying out any work.
2
Note
Details identified by the word "Note" contain additional
information.
■ Work on the refrigerant circuit may only be carried
out by authorised refrigeration engineers.
■ 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 authorised by the
installer.
■ 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
Danger
Hot surfaces and fluids can lead to burns or
scalding.
■ Before maintenance and service work, switch
OFF the appliance and let it cool down.
■ Never touch hot surfaces on the appliance, fit-
tings or pipework.
!
Please note
Electronic assemblies can be damaged by elec-
trostatic discharge.
Prior to commencing 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.