Specifications

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Contents, specifications and availability are subject to change due to the technical improvement.
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Fully automatic self-test
R 1234yf service units are subject to special safety regulations. The refrigerant must not
escape into the atmosphere. Therefore, the ASC 5000RPA from WAECO automatically
performs a leak check in regular intervals. This ensures that potential minor leaks in the
system will not remain undetected.
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Service couplers with clearance ventilation
The service connections on R 1234yf air conditioners are dierent from those on R 134a
systems. This eliminates the risk of confusion when connecting the service equipment.
Service couplers on R 1234yf systems must have what is called a “ventilated clearance” to
ensure that no refrigerant escapes from the air conditioner even when you have a defective
Schrader valve.
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Clearly recognisable service equipment
A/C workshops are most likely to have two dierent A/C service units in the future,
because R 134a and R 1234yf are not compatible with each other. To avoid confusion right
from the start, the dierences between the units should be clearly visible.
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Separate manometers for R 1234yf
R 1234yf and R 134a have dierent chemical properties and must not be mixed.
Accordingly, pressurised containers, hoses, gaskets and manometers all have to be
adapted to the specific refrigerant. Universal service units used for both refrigerants must
have separate circuits and separate components wherever they get in touch with the
substances.
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Integrated refrigerant analysis / safe and smooth process flow
R 1234yf is very sensitive to cross contamination with other refrigerants. Therefore, it is
mandatory to use analysis equipment to check the refrigerant purity. You can save time if
the analysis tool is already integrated in the service unit. Also, it is safer because the
analysis is always done automatically.
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Low Emission
The low-emission technology prevents workshop sta are exposed to illegally high
concentrations of R 1234yf.
12 THINGS – YOU OUGHT TO KNOW ABOUT
R 1234YF SERVICE UNITS
Time and again we see A/C service units being offered in the marketplace that do not meet
the technical requirements for use with R 1234yf. Here are some things for you to consider,
just to be “on the safe side”:
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External switch-on delay
R 1234yf is inflammable under certain conditions. Therefore, the system start will only
activate the external fan at first. After the fan has been running for 35 seconds, the voltage
is passed on to the system. This guarantees there’s no inflammable mixture contained in
the system when the electrical components are enabled.
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External ventilation
Prior to system start-up, the service unit is ventilated upon pressing the ON button. For the
purpose the ASC 5000RPA features large ventilation holes in the base. It only makes sense
to use an external fan that draws fresh air in. A fan fitted inside the unit might lead to an
inflammable mixture.
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Easy-to-maintain special filter
Electronic change-filter indicator: After a certain amount of refrigerant recovered the
system automatically tells you it’s time to replace the filter. The filter is accessible from the
outside for easy maintenance.
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Get everything from one source
It’s not enough to have an A/C service unit and maintain a stock of refrigerant. A good
supplier will also provide all the consumables required for A/C service, such as oils and
leak detection additives. Please bear in mind that PAG oils and ester oils for R 134a are not
suitable for use in R 1234yf A/C systems!
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Avoid costly refrigerant loss
It can be expected that the price for R 1234yf will be considerably higher than that
for R 134a – another reason why refrigerant loss should be avoided. Conventional
A/C service units may lose up to 100 kilograms of refrigerant per use through the
vacuum pump and during oil recovery. This is all dierent with the ASC 5000RPA from
WAECO. Based on the low-emission principle, it has a refrigerant loss rate of close to
zero %.
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Connection for external refrigerant recovery (not illustrated)