Viessmann AWO-M-AC 101.A06, Assembly And Servicing Instructions

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34
6020930
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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 mainte- nance and repair
work requires assistance from additional individuals, the person trained in the han- dling of flammable refrigerants must
constantly supervise the work.
■
In order to minimise the risk of ignition, safety checks must be carried out before any work on appliances with flammable
refrigerants can commence. Take the following measures
before interfering with the refrig- erant circuit:
Measure Completed Notes
1
General working environment
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Inform the following persons of the type of work to be carried
out:
–
All maintenance personnel
–
All persons in the vicinity of the system.
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Cordon off the area around the heat pump.
■
Survey the immediate surroundings of the heat pump for flam-
mable materials and sources of ignition:
Remove all flammable materials and sources of ignition.
2
Checking for the presence of refrigerant
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In order to recognise a flammable atmosphere in time:
Before, during and after the work, check the surrounding area
for any escaping refrigerant, using an explosion-proof refrigerant
detector suitable for R32.
This refrigerant detector must not generate any sparks and must
be suitably sealed.
3
Fire extinguisher
A CO
2
or powder extinguisher must be at hand in the following ca-
ses:
■
Refrigerant is being topped-up.
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Welding or brazing/soldering work is being carried out.
4
Sources of ignition
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When carrying out work on a refrigerant circuit that contains or
previously contained flammable refrigerant, never use sources
of ignition that could ignite the refrigerant.
Remove all possible sources of ignition, 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 sources of ignition.
■
Display no smoking signs.
5
Ventilating the work location
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Carry out repairs outdoors, or provide adequate ventilation for
the work location before interfering with the refrigerant circuit or
commencing any welding or brazing/soldering work.
■
The ventilation must be maintained for the entire duration of the
work. The ventilation should dilute any refrigerant that may es-
cape and should ideally discharge it to atmosphere.