82
For systems with flammable refrigerants
■
Every person working on the refrigerant circuit must
be able to produce a certificate of competence
issued by an organisation with industry accreditation.
This certificate confirms their competence in the safe
handling of refrigerants by means of a standard
industry procedure.
■
Servicing work may only carried out in accordance
with the manufacturer's specifications. If necessary,
maintenance and repair work can be carried out by
other persons to provide support. However, the per-
son trained in handling flammable refrigerants must
constantly supervise the work.
■
In order to minimise the risk of fire, safety checks
must be carried out before commencing any work on
appliances with flammable refrigerants. Take the fol-
lowing measures before interfering with the refriger-
ant circuit:
Measure Completed Comments
!
General working environment
■
Inform the following persons of the type of work to be carried
out:
–
All maintenance personnel
–
All persons in the vicinity of the system.
■
Shut off the area surrounding the heat pump.
■
Survey the immediate surroundings of the heat pump for flam-
mable materials and sources of ignition:
Remove all flammable materials and ignition sources.
?
Checking for the presence of refrigerant
■
In order to recognise a flammable atmosphere in time:
Before, during and after the work, check the surrounding area
for any escaping refrigerant, using a suitable, fireproof refriger-
ant detector suitable for R32.
This refrigerant detector must not generate any sparks and must
be suitably sealed.
§
Fire extinguisher
A CO
2
or powder extinguisher must be to hand in the following ca-
ses:
■
Refrigerant is being drained.
■
Refrigerant is being topped up.
■
Welding or brazing/soldering work is being carried out.
$
Sources of ignition
■
When carrying out work on a refrigerant circuit that contains or
previously contained flammable refrigerant, never use ignition
sources that could ignite the refrigerant.
Remove all possible ignition sources, including cigarettes, from
the area where installation, repair, dismantling or disposal work
is taking place that may result in refrigerant escaping.
■
Before starting work, survey the immediate surroundings of the
heat pump for flammable materials and sources of ignition:
Remove all flammable materials and ignition sources.
■
Display no smoking signs.
Maintenance
Checklist for maintenance work
6199592
Maintenance
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