ascon A5RT 120 BR, User Manual

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55
Service Of The Filter
Filter Position
The filters are mounted in front of the indoor heat exchanger.
Unit shown in the diagram is A5RT90BR. Other models shall follow the same method.
Remove filter cover for filter service.
Alternatively, remove service panel for filter service.
Vacuuming And Charging
Invert cylinder
without dip-pipe
Liquid
withdrawal
Dip-pipe
! CAUTION
• R410A must be charged as liquid. Usually R410A cylinder is equipped with a dip-pipe for liquid withdrawal. If
there is no dip-pipe, the cylinder should be inverted so as to withdraw liquid R410A from the valve.
• Do not top-up when servicing leak, as this will reduce the unit performance. Vacuum the unit thoroughly and
then charge the unit with fresh R410A according to the amount recommended in the specification.
Normally , the R410 A cylinder or can is being equipped with a dip-pipe fo r liquid withdrawal. However, if the
dip-pipe is not available, invert the cylinde r or can so as to withdraw liquid fr om the valve at the bottom.
The rooftop package units are factory pre-cha rged with sufficient refrigerant. However , there may be a need for
char ge recovery during service and maintenance works. Therefore, some precautions must be taken to ensure
optimum and trouble-free system operation:
(i) The system should be throughly vacuumed to ensure no incompressible gas and moisture in the system.
(ii) Use a vacuum pump for R410 A exclusively. Using the same vacuum pump for different refrigerants may
damage thevacuum pump or the unit.
(iii) The refrigerant should never be released directly into the environment.
(iv) When char ging R410A, ensure that only liquid is being withdrawn from the cylinder or can.
• Remove any dust adhering to the filter by using a vaccum cleaner or wash in lukewarm water (below 40°C)
with neutral cleaning detergent.
• Rinse the filter well and dry before placing it back onto the unit.
• Do not use gasoline, volatite substances or chemicals to clean the filte r.
• Clean the filter at least once every 2 weeks. Or more frequently if necessar y.
10. SERVICING & MAINTENANCE