Dometic Frigo DC Bedienungsanleitung
REFRIGERATION
FRIGO DC
Frigo DC
EN
DE
Electrical transport refrigeration
system
Elektrische Transportkühlanlage
Service manual for Flushing . . . . . . . . . . 3
Serviceanleitung für Spülen . . . . . . . . . 12
3
Frigo DC
EN
Original instructions
Please read this manual carefully before starting the device. Keep it in
a safe place for future reference. If the device is passed on to another
person, this manual must be handed over to the user along with it.
The manufacturer cannot be held liable for damage resulting from improper
usage or incorrect operation.
Table of contents
1 Explanation of symbols. ...................................................... 4
2 Safety instructions.............................................................. 4
2.1 General safety.................................................................................... 4
2.2 Safety during installation ..................................................................... 5
2.3 Intended use ..................................................................................... 5
3 Flushing the refrigeration system.......................................... 5
3.1 Prerequisiteforushing ...................................................................... 6
3.2 Instructions for use ............................................................................. 6
3.3 Preparationforushing ....................................................................... 6
3.5 Aertheushingprocess ....................................................................11
4
Explanation of symbols
Frigo DC
EN
1 Explanation of symbols
DDANGER!
Safety instruction: Failure to observe this instruction will cause death or
serious injury.
!WARNING!
Safety instruction: Failure to observe this instruction can cause death or
serious injury.
!CAUTION!
Safety instruction: Failure to observe this instruction can lead to injury.
ANOTICE!
Failure to observe this instruction can cause meterial damage and impair the
function of the product.
INOTE
Supplementary information for operating the product.
2 Safety instructions
Please observe the prescribed safety instructions and stipulations
from the vehicle manufacturer and service workshops.
The manufacturer accepts no liability for damage in the following cases:
• Faulty assembly or connection
•Damage to the product resulting from mechanical inuences and incorrect
connection voltage
• Alterations to the product without express permission from the manufacturer
• Use for purposes other than those described in the operating manual
2.1 General safety
!• The installation and repair of the transport refrigeration system may only be
carried out by qualied personnel who are familiar with the risks involved
and the relevant regulations. Inadequate repairs may cause serious ha-
zards. For repair service, please contact the service center in your country.
•The inhalation of refrigerant vapor can cause suocation. Ensure that the
coolant has been properly extracted using an air conditioning service unit
before opening the refrigeration system.
5
Flushing the refrigeration system Frigo DC
EN
•Only use the transport refrigeration system for the purpose specied by the
manufacturer and do not make any alterations or structural changes to the
device.
•Danger of injury from leaking uids if the transport refrigeration system is
damaged. Leaking uids on the oor can cause persons to slip and injure
themselves. Wipe up any leaked or dripped uids immediately or absorb
them with a suitable binding agent and dispose of them in an environmen-
tally responsible manner.
• Only for standby-cooling (optional): Pay attention that you do not
come into contact with any live parts. Only use the power cable supplied
for connecting to the external power supply to avoid the risk of injury from
using faulty cables. When in stationary mode, the transport refrigeration
system works with voltages of 230 V at corresponding currents.
2.2 Safety during installation
!• Please note that the installation may only be carried out by persons who
have a corresponding certicate of competence, for example in accordan-
ce with EC Regulation 307/2008, for installation and start-up of transport
refrigeration systems.
• Ensure that you wear protective clothing (especially eye protection and
pro-tective gloves) for all work done on the transport refrigeration system.
2.3
3
Intended use
These instructions serve as working instructions for removing the remaining
refrigerant oil in the system.
Any other instruction or instruction going beyond this is considered as not in
accordance with the intended use.
Proper use also includes observing the safety instructions.
Flushing the refrigeration system
Flushing a Dometic Frigo DC system is absolutely necessary if mechanical com-
pressor damage has occurred.
Flushing may also be necessary to completely remove refrigerant oil remaining
in the system. During the ushing process, all refrigerant oil residues and impu-
rities are removed from the refrigerant circuit.
6
Flushing the refrigeration system
Frigo DC
EN
3.1 Prerequisite for flushing
The following tools and aids are required for flushing the transport refrigeration
system:
•A/C service station with a ushing device
•8885300127 Flushing adapter set III, 5 pieces
•8885300104 Flushing adapter set V, 143 pieces
3.2 Instructions for use
DDANGER! Danger of fatal electric shock!
Before starting any installation work, disconnect the battery and make sure
that no voltage can be transferred to the electrical components. Danger of
injury due to live electrical components. When connecting the electrical com-
po-nents, there is a risk of electric shock.
!WARNING!
Improper interventions or ttings on and in the vehicle’s electrical system and
electronics system can lead to impairment of the functions. This can lead to
the failure of vehicle-mounted components or vehicle safety equipment and
as a result to accidents involving personal injury or damage to the vehicle.
!CAUTION!
•The transport refrigeration system may only be installed by qualied per-
sonnel from a specialist company. The following information is intended for
technicians who are familiar with the guidelines and safety precautions to
be applied.
• Improper installation of the transport refrigeration system can result in irrep-
arable damage to the device and put the safety of the user at risk.
• The manufacturer assumes no liability for malfunctions and for the safety
of the transport refrigeration system, especially for injury and/or damage
to property, if the transport refrigeration system is not tted in accordance
with this installation manual.
• Always wear the recommended protective clothing (e.g. protective gog-
gles, gloves).
3.3 Preparation for flushing
!WARNING!
Improper interventions or ttings on and in the vehicle’s electrical system and
electronics system can lead to impairment of the functions. This can lead to
the failure of vehicle-mounted components or vehicle safety equipment and
as a result to accidents involving personal injury or damage to the vehicle.
7
Flushing the refrigeration system Frigo DC
EN
Before the ushing process, the refrigerant must be recovered from the cooling
system.
In case of mechanical damage to the compressor:
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 the service unit.
For refrigerant oil residues:
To remove the refrigerant oil before ushing, the refrigerant should be reco-
vered through the high pressure connection. If possible, the cooling system
should be run for a few minutes before recovery. This ensures that a higher
amount of oil in the cooling system is already being sucked out and does not
need to be removed by ushing.
Proceed as follows:
➤Connect the A/C service station with the cooling system and dispose of the
coolant of the cooling system completely.
INOTE
For the ushing process, components must be dismantled and bridged with
adapters in order to ensure optimum ow during ushing.
Hoses or components that cannot be integrated into the ushing circuit have
to be replaced or cleaned manually.
8
Flushing the refrigeration system
Frigo DC
EN
1
Fig. 1: Flowchart with the removed components
Pos. Components to be removed Notes
4 Reciever Dryer
5 Compressor
6 Solenoid valve
7Nozzle Expansion valve
ANOTICE!
For a ushing process due to mechanical damage to the compressor, the
expansion valve must also be removed. The connection for the capillary pipe
must then also be closed for the ushing process.
➤Remove the compressor.
➤Remove the solenoid valve.
9
Flushing the refrigeration system Frigo DC
EN
➤Remove the reciever dryer.
➤Remove the internal nozzle of the expansion valve and screw the pipe with
expansion valve back together.
In case of mechanical damage to the compressor:
➤Remove the expansionvalve and the capillary pipe.
INOTE
• For bypassing the dryer and the solenoid valve must be made using the
adapter set 8885300104.
•When ushing residual oil quantities, it is also possible to connect the sole-
noid valve to +12 Volt to open the valve and allow ow.
•The cooling system is ushed against the ow direction.
2
Fig. 2: Connection with the A/C service station
➤Bridge the two pipes from the reciever dryer.
➤Bridge the two pipes from the solenoid valve.
10
Flushing the refrigeration system
Frigo DC
EN
➤Bridge the expansionvalve and close it.
➤Close the opening of the capillary pipe.
➤Connect the A/C service station and the flushing container to the
refrigerant circuit. Use the adapters 8885300127 to connect the refrigerant
hoses of the A/C service station to the disconnected compressor hoses of
the refrigerant compressor, (fig. 2).
−High pressure side (red) of the A/C station with the low pressure side of the
cooling system
−Low pressure side (blue) of the A/C station with the high pressure side of the
cooling system
3
Fig. 3: Sight glass from the ushing tank of the A/C service station
➤Flush the system in reverse ow direction until the refrigerant visible through
the sight glass of the ushing container is clear, (g. 3).
4
Fig. 4: Waste oil collecting tank of the A/C service station
➤Then flush the refrigerant circuit in flow direction until the oil stops leaking
out, (fig. 4).
In case of mechanical damage to the compressor
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2
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