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Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017
1.2.10
Receiver
♦ The receiver -B- collects the liquid droplets and directs them
in a continuous stream to the expansion valve. Any moisture
that has entered the refrigerant circuit during assembly is col‐
lected by a dryer -D- in the receiver -B-.
♦ Depending on the layout of the refrigerant circuit and the ver‐
sion of condenser -A-, the receiver -B- may be installed on the
condenser -A- or (integrated) in the condenser -A- ⇒ Heating,
air conditioning; Rep. gr. 87 ; Refrigerant circuit (vehicle-spe‐
cific workshop manual) and ⇒ Electronic parts catalogue .
♦ Installed in the receiver -B- is a dryer (e.g. desiccant bag -D-)
and strainer -F- (that filters out smaller contaminants).
Note
♦ The receiver -B- comes in different versions and different de‐
signs ⇒ Heating, air conditioning; Rep. gr. 87 ; Refrigerant
circuit (vehicle-specific workshop manual) and ⇒ Electronic
parts catalogue .
♦ Renew the receiver -B- and plastic bolt (with seals) -C-, des‐
iccant cartridge -D-, filter carrier -E- and strainer -F- if the
refrigerant circuit was open for an extended period of time and
moisture has been absorbed, or if required to do so owing to
a specific complaint ⇒ page 79 .
♦ Do not remove the sealing plugs of a receiver until immediately
prior to installation as a desiccant bag in a non-sealed reser‐
voir will become saturated with moisture and become unusa‐
ble.
♦ The desiccant cartridge comes in an air-tight transport bag,
which should remain sealed for as long as possible. Do not
open the transport bag until immediately prior to inserting the
desiccant cartridge -D- in the receiver -B- of the condenser.
After the transport bag has been opened, the desiccant car‐
tridge will become saturated with moisture within a short time
and is then unusable.
♦ When installing, observe arrow indicating direction of flow if
applicable.
♦ The procedure to adopt in the event of a complaint differs de‐
pending on the type of receiver/desiccant cartridge. If the
receiver is installed on the condenser, for example, it can be
renewed completely with the desiccant cartridge. If the receiv‐
er is integrated in the condenser, for example, the desiccant
cartridge and an additional filter element (if one is fitted) can
be replaced individually on most versions. If the receiver is
integrated in the condenser and it is not possible to replace
the receiver/desiccant cartridge separately, it may be neces‐
sary to replace the entire condenser ⇒ Heating, air condition‐
ing; Rep. gr. 87 ; Refrigerant circuit (vehicle-specific workshop
manual) and ⇒ Electronic parts catalogue .
♦ Depending on the layout of the refrigerant circuit (with desic‐
cant bag or desiccant cartridge), the receiver may also be
integrated in the refrigerant circuit (it need not always be in‐
stalled on or in the condenser) ⇒ Heating, air conditioning;
Rep. gr. 87 ; Refrigerant circuit (vehicle-specific workshop
manual) and ⇒ Electronic parts catalogue .
1. Refrigerant circuit
47
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