Vacuum Down The System; Fill The Service Station With Oil; Charge The System With Oil And Refrigerant (Frigo Top 24 Rt-D R134A) - Webasto Frigo Top 24 Rt-D Einbauanweisung

9.2

Vacuum down the system

Fig. 23 Gauge set
1 Low-pressure side (Blue)
2 High-pressure side (Red)
3 Vacuum hose / refrigerant supply (Yellow)
Prepare gauge set
The figure shows a common gauge set for vacuum and char-
ging the system. (Gauges can differ from the one shown here)
1. Close all gauge valves before connecting the hoses to the
A/C system.
Connect the gauge to the refrigeration system
Fig. 24 Frigo Top Charge point, high-pressure side
ü The instruction below is only valid for new systems not
already charged with refrigerant.
1. Connect the low-pressure gauge (Blue) to the low-pressure
service port on the compressor suction line (R134a: Fig. 13)
or on the condenser unit (R452A: Fig. 14).
2. Connect the high-pressure gauge (Red) to the high-pressure
service port on the Liquid receiver / Filter drier in the con-
denser unit, (R132a: Fig. 13) or (R452A: Fig. 14).
3. Connect the vacuum hose (yellow) to the vacuum pump.
4. Vacuum down the system.
Make sure that the vacuum reaches 60 Pa.
The sight glass must be green.
5. Close the gauge valves and switch off the vacuum pump.
NOTE
After the vacuum pump is disconnected a maximum
pressure increase of 30 Pa is allowed.
6. If the system is losing vacuum then there is a leakage.
– Use a leak detector to check the system on leakage.
6248543A Frigo Top 24 RT-D _ RT-DG ML
9.3

Fill the service station with oil

Fig. 25 Add the correct quantity of lubricant
ü Keep the service station always lubricated according the in-
structions on the service station.
ü Refrigerant type has been checked.
ü Make sure that the oil type matches with the refrigerant
type.
CAUTION
Use of the wrong refrigerant type
Result: System damage.
u
Check the refrigerant type stated on the type label.
Refrigerant Oil type
R134a PAG
R452A POE68
Table 6: Oil type and quantity
9.4 Charge the system with oil and
refrigerant (Frigo Top 24 RT-D
R134a)
Fig. 26 R134a Compressor/Condenser, high-pressure service port, posi-
tion 4
1. Add 50 ml of oil in the system via the high-pressure service
port.
– You can use the high-pressure service port in the com-
pressor line or the high-pressure service port in the con-
denser unit.
2. Charge system with refrigerant. For the amount of refriger-
ant see chapter 11, "Technical data" on page 14.
3. Check system on leakage.
Vacuum and charge the system | 9
Quantity supplied [ml]
250
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