6 x Maintenance
56
BA ROTEX HPSU compact 2 - 04/2011
6.2 Activities to be performed annually
WARNING!
Improperly carried out work on the HPSU compact and its components that have been connected as an option
can endanger human life and health and adversely affect the operation of the these components.
• Work on the HPSU compact (such as maintenance or servicing) is only to be carried out by persons who
are authorised and who have successfully completed qualifying technical or vocational training and
who have taken part in advanced training sessions recognised by the appropriate responsible authorities.
These include in particular certified heating engineers, qualified electricians and HVAC specialists,
who because of their professional training and expert knowledge, have experience in the professional
installation and maintenance of heating, cooling and air conditioning systems and heat pumps.
WARNING!
The gaseous refrigerant is heavier than air. In pits or in badly ventilated rooms it can collect in high
concentrations. Breathing in high concentrations of gaseous refrigerant leads to feelings of faintness
and suffocation. Toxic gases can be formed if gaseous refrigerants come into contact with open fire or
hot objects.
• When working on the refrigerant circuit, ensure that the workplace is well ventilated.
• If necessary, before starting work, evacuate the refrigerant system completely.
• Never carry out work on the refrigerant circuit in closed rooms or work pits.
• Do not let refrigerant come into contact with open fire, embers or hot objects.
• Never allow refrigerant to escape into the atmosphere (forms high concentrations).
• After removing the service pipes from the filling connections, carry out a leakproof test on the refrigeration
system. Refrigerant can escape through leaks.
WARNING!
At normal atmospheric pressure and ambient temperatures, liquid refrigerant vaporises so suddenly that on
contact with skin or eyes it can cause the tissue to freeze (danger of going blind).
• Always wear safety goggles and protective gloves.
• Never allow refrigerant to escape into the atmosphere (high pressure at the point of the leak).
• When removing the service pipes from the filling connections, never hold the connections in the direction of
your body. Residual refrigerant could escape.
WARNING!
Under the cover of the HPSU compact temperatures of up to 90 °C can arise during operation. During
operation, hot water temperatures >60 °C arise.
– Touching components during or after operation leads to a risk of burns.
– Water discharged during maintenance and servicing work can cause scalding on contact with the skin.
• Before carrying out servicing and maintenance work, allow the ROTEX HPSU compact to cool down
sufficiently.
• Wear protective gloves.
WARNING!
Touching live parts can result in an electric shock and lead to potentially fatal injuries and burns.
• Before beginning work on live parts, disconnect them from the power supply (switch off fuse,
main switch) and secure against unintentional restart.
• The electrical connection and working on the electrical components should only be performed by
electrical engineers in compliance with valid standards and guidelines as well as the specifications
of the energy supply company.
•The equipment covers and maintenance opening covers must be re-fitted immediately after
completion of the work.
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