Viessmann VITOCAL 100-AW Installation, Service And Operating Instruction page 69

Vitocal 100-AW AM2V Installation, Service and Operating
Maintenance
General: place of work
H Inform the persons listed below of the work to be carried out:
- All maintenance staff
- All persons who are in the vicinity of the installation.
H Close off the area near the heat pump.
H Check the surroundings of the heat pump for combustible materials and sources of ignition.
Remove all combustible materials and sources of ignition.
Monitoring the presence of refrigerant
H To identify flammable atmosphere in good time: Before, during and after the work, check the
surroundings for refrigerant leaks using an ignition-protected refrigerant detector designed
for R32. The refrigerant detector must not cause any sparks and must be properly sealed.
Fire extinguisher
A CO or powder extinguisher must be available in the cases described below:
2
H Filling the system with refrigerant.
H Performing welding or soldering work.
Sources of ignition
H During any work carried out on a refrigeration circuit that contains or contained a refrigerant,
ignition sources that could ignite the refrigerant must not be used. Any possible sources
of ignition, including cigarettes, must be removed from the area where installation, repair,
dismantling or disposal work is to be carried out that involves a hazard of the refrigerant
leak.
H Before starting work, check that there are no combustible materials or sources of ignition
around the heat pump. Remove all combustible materials and sources of ignition.
H Place no-smoking signs
Work area ventilation
H Carry out repairs in the open air or ventilate the work area well before working on the
cooling system or carrying out welding or soldering work.
H Ventilation must be in operation at all times. The purpose of the ventilation is to dilute the
refrigerant in the event of a leak and to discharge it outdoors if possible.
For systems with flammable refrigerants
H Anyone working on a refrigeration system is
required to submit a proof of qualification issued
by an accredited body authorised to issue
industry certifications. The proof of qualification
is a certificate of competence in the safe
handling of refrigerants as prescribed in industry
standards.
H Maintenance work must always be carried
out in accordance with the manufacturer's
requirements. If assistance by other persons is
required during maintenance and repair work,
then a person trained in the safe handling of
flammable refrigerants is required to supervise the
work being carried out at all times.
H In order to minimise the risk of fire, it is necessary
to carry out safety checks before working on
equipment where flammable refrigerants are used.
Before working on a refrigeration circuit, the
following measures must be taken:
Service
69