Dometic Frigo DC Service Manual page 6

Flushing of mechanical impurities
6. After completion of the flushing process, check the amount of waste oil separated in
the waste oil container of the service station (fig. b).
NOTE!
Ensure that the total amount of coolant oil is approximately reached after the
flushing process. Add the amount of waste oil collected to the amount of coolant
oil flushed out. If the amount of oil flushed out is not sufficient, start another
flushing process.
4.3 Activities after the flushing process
1. Remove all flushing adapters from the lines.
2. Install a new filter dryer.
3. Mount the removed magnetic coil back onto the magnetic valve.
NOTICE!
• If the compressor remains in the transport refrigeration system, remove the re-
• When replacing the compressor, it is not necessary to check the coolant
4. Make sure that the compressor contains sufficient coolant oil.
5. If necessary, fill the compressor with the prescribed total amount of oil (200 ml, Zerol
Ester 68 SL or WAECO SE 55 POE).
6. Perform a complete functional test of the transport refrigeration system.
5 Flushing of mechanical impurities
5.1 Preparations
NOTICE!
To protect your A/C service unit, the refrigerant must be recovered via the
low-pressure connection. This ensures that most contaminants remain in the
cooling system and do not enter your service unit.
1. Connect the A/C service station to the transport refrigeration system and dispose of
the transport refrigeration system's refrigerant oil completely.
2. Perform the steps as shown (fig. 2 - fig. 8).
NOTE!
When the magnetic valve opener (fig. 1 4) is put on and the magnetic valve is
tightened, you must hear a distinct clicking sound. If you do not hear a clicking
sound, replace the magnetic valve opener rotated by 180° (fig. 8).
3. Perform the steps as shown (fig. c - fig. f).
4. Perform the steps as shown (fig. 8 - fig. a).
6
maining coolant oil from the compressor and then refill it with the prescribed
total oil quantity.
oil quantity, as a new compressor already contains the prescribed total oil
quantity.
Frigo DC
EN