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Rooftop Air Conditioning System Citysphere
6.
MAINTENANCE
6.1.
Safety instructions
The safety instructions and regulations in chapter 1.3 must be observed.
6.2.
General
a)
All work on the refrigerant circuit may only be carried out by qualified personnel from duly authorized
specialist repair shops.
b)
The special equipment, tools and accessories listed in chapter 4.6 are required and must be used
for maintenance work on the refrigerant circuit.
c)
Like all parts of the vehicle, the air conditioning system is subject to constant stresses. The specified
maintenance work must be carried out regularly in order to ensure trouble free operation of the
system and avoid damage to the components.
d)
Proper handling of the system and a complete record of all the required scheduled maintenance are
essential for acceptance of possible warranty claims concerning damaged components subject to
maintenance.
e)
To prevent moving parts in the refrigerant circuit from seizing up due to resinification of the oil, the
air conditioning system must be switched on for approx. 10 minutes at least once per month when
it is not in regular use. Requirement: (Minimum outside temperature > 12 °C or heated hall.)
6.3.
Maintenance and Care
a)
Regardless of the following schedule, all screw connections securing the rooftop air conditioning
system must be checked within four weeks of using the system for the first time in order to ensure
that they are secure.
b)
Even if the air conditioning system is not operated, individual components are subject to wear due
to normal ageing or stress due to vehicle operation. All checks listed in the maintenance and
servicing plan must therefore be performed regardless of the system operating hours.
c)
Even if hose connections do not leak, refrigerant may be lost regardless of operating hours.
However, a leak must be assumed to exist somewhere in the system if relatively large quantities of
refrigerant are lost.
d)
Slight contamination of evaporator and condenser fins is removed with compressed air applied
against normal direction of airflow.
Major contamination or greasy deposits must first be removed with soapy water or a suitable
cleaning solvent (not aggressive for copper or aluminium) before cleaning with compressed air or
a water jet.
e)
The receiver-drier must be replaced principally whenever work has been performed on the
refrigerant circuit.
f)
The filter mat must be replaced at regular intervals
g)
The drain holes for rain water in the baseplate must be unobstructed.
Under no circumstances may refrigerant be discharged into the atmosphere.
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