4
Product-specific information
8
4
Product-specific information
•
The measuring instrument being dropped or any other comparable
mechanical stress may cause breakage of the pipe pieces in the refrigerant
hoses. The valve positioners may also suffer damage, causing further
damage inside the measuring instrument that is not necessarily visible
externally. Therefore, always replace the refrigerant hoses with new ones
after the measuring instrument is dropped or after any comparable
mechanical stress. For your own safety, you should return the measuring
instrument to the Testo Customer Service for technical inspection.
•
Electrostatic charging may destroy the instrument. Integrate all the
components (system, manifold's valve block, refrigerant bottle, etc.) into the
potential bonding (earthing). Please see the safety instructions for the
system and the refrigerant used.
•
Refrigerant gases can harm the environment. Please note the applicable
environmental regulations.
•
Use with A2L refrigerants
Testo measuring instruments (as of July 2020) can be used in compliance
with the prescribed laws, standards, directives and safety regulations for
refrigeration systems and refrigerants as well as regulations of the
manufacturers of refrigerants of safety group A2L as per ISO 817.
Regional standardization and interpretation must always be observed.
For example, DIN EN 378-Part 1-4 applies to the scope of the EN
standards.
During maintenance work, the employer must ensure that a hazardous
explosive atmosphere is prevented (see also: TRBS1112, TRBS2152
VDMA 24020-3).
A hazardous and potentially explosive atmosphere must be anticipated
during maintenance and repair work on refrigeration systems with
flammable refrigerants (e.g. those of category A2L and A3).
Maintenance, repairs, removal of refrigerants and commissioning of
systems may only be carried out by qualified personnel.
5
Use
testo 550s
and
testo 557s
are digital manifolds for maintenance and service
work refrigeration systems, heat pumps, and other air conditioning systems.
They may only be used by qualified authorized personnel.
The functions of the instruments
testo 550s
and
testo 557s
mean they can
replace mechanical manifolds, thermometers and pressure/temperature charts.
Pressures and temperatures can be applied, adapted, tested and monitored.
The instruments
testo 550s
and
testo 557s
are compatible with most non-
corrosive refrigerants, water and glycol. The instruments
testo 550s
and
testo
557s
are not compatible with refrigerants containing ammonia.
The products must not be used in potentially explosive atmospheres!
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.com
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