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Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017
Note
♦ The amount of UV leak detection additive to be charged in the
refrigerant circuit with a refrigerant oil volume up to 150 cm3
is 3.0 ± 0.5 ml. If the volume of refrigerant oil in the refrigerant
circuit is greater, more UV leak detection additive must be
added accordingly, e.g. 5.0 ± 0.5 ml in a refrigerant circuit with
a refrigerant oil volume of 250 cm3. If the UV leak detection
additive is filled with an air conditioner service station , the
volume to be set in your air conditioner service station may
differ. Therefore, observe the relevant operating instructions
⇒ Operating instructions Air conditioner service station .
♦ For the specific volume of refrigerant oil in the refrigerant cir‐
cuit, refer to the vehicle-specific workshop manual ⇒ Heating,
air conditioning; Rep. gr. 00 ; Technical data .
♦ If leak UV leak detection additive was injected during a previ‐
ous repair of the refrigerant circuit, observe the following: do
not inject new UV leak detection additive unless the refrigerant
machine oil has been replaced. If only some of the refrigerant
machine oil was replaced then only the respective amount of
UV leak detection additive should be injected. If, for example,
50 ml of refrigerant oil is replaced in a vehicle with 150 ml of
refrigerant oil, inject only 1.0 ml (cm3) of UV leak detection
additive.
The leak detection system comprises the following parts:
♦ Cleaning agent -3-
♦ UV leak detection lamp -4-
♦ UV absorbing eye protection -5-
lk
♦ Sticker -6-
♦ Gloves -8-
Note
Items -1-, -2- and -7- in the diagram can be disregarded.
Special tools and workshop equipment required
♦ Leak detecting system
♦ Air conditioner service station with means of adding UV leak
detection additive in the refrigerant circuit ⇒ Electronic parts
catalogue .
♦ Approved leak detection additive ⇒ Electronic parts cata‐
logue .
– Evacuate the refrigerant circuit as per the instructions, and
charge the system with UV leak detection additive and refrig‐
erant ⇒ “2.5 Evacuating refrigerant circuit”, page 140 and
⇒ “2.6 Charging refrigerant circuit”, page 146 .
– Wait until the pressures on the high pressure and low pressure
side have settled.
1. Refrigerant circuit
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