Refrigerant Handling - Dimplex La 1118Cp Montage- Und Gebrauchsanweisungen

English
The following steps must be adhered to before starting the
work
1) Before starting the work, ensure that the power supply to
the device is disconnected externally. The earth connec-
tion must be guaranteed. After disconnecting the power
supply, you have to wait 5 minutes before all components
are de-energised.
2) The refrigeration circuit must not be damaged.
3) Before and when opening the device, check the working
area and the interior of the device for the presence of R290
using the refrigerant detector.
Anyone carrying out work on the refrigeration circuit must be
certified to safely handle flammable refrigerants or be super-
vised by a person with such certification.
If there is a risk of refrigerant escaping during repair work, a mo-
bile ventilation (ex-proof fan) can be used as a supporting or
even essential measure.
Before starting the repair work on the relevant component, the
paint protector must be checked to ensure it is in the original
state. Paint protectors that have to be removed for the repair
work must be mounted again once the work is complete.
If soldering or welding work has to be carried out, an appropri-
ate fire extinguisher must be in the immediate vicinity. A CO2 or
powder extinguisher must also be available in the location
where the device is filled with refrigerant.
DANGER!
Risk of death due to fire or explosion.
The device contains flammable refrigerant (R290). In case of
leakage, the refrigerant can mix with the ambient air and form
a flammable atmosphere.
 Work on the heat pump is only to be carried out by people
with the knowledge set out in Fig. 1.1 on page 4.
Avoid ignition sources (naked flames, hot surfaces,

electrical equipment with ignition sources and static
discharge) and fire loads in the danger zone.
 Before and when opening the device, check the working
area and the interior of the device for the presence of
R290 using the refrigerant detector.
 Cordon off the area around the device to prevent
unauthorised access.
To prevent excessive leakage of refrigerant when connecting
hoses to the refrigeration circuit and sealing them, it is useful to
use a quick opening refrigerant Schrader valve.
CAUTION!
Leakage from the hydraulic circuit can result in damage.
Continuous sealing of the entire hydraulic network must

be ensured.
Check that the wiring is not exposed to any wear, corrosion,
tension, vibrations, sharp edges and other unfavourable envi-
ronmental influences. The check must also take into account
the effects of ageing.
If the high pressure switch has been replaced, correct function-
ing must be ensured during the leakage tightness test with ni-
trogen.
EN-24

11.1 Refrigerant handling

(removal and filling)
Always proceed as follows before opening the
refrigeration circuit:
If possible, siphon off the refrigerant using suitable equipment
and collect it in approved recycling bottles. All personnel must
be trained in handling recycling bottles for R290. Handling re-
cycling bottles as well as their return/disposal must comply
with the safety rules, in this respect refer to the information
supplied by the recycling system's operator. If it is not possible
to siphon and recycle, the refrigerant may alternatively be
drained through a hose into a safe zone containing no ignition
sources, windows, doors, ventilation openings, light wells,
sewer system openings or similar.
Additionally, a suitable fan (Ex zone II) must be used at the hose
outlet point to ensure that the refrigerant is sufficiently diluted.
To achieve the fastest possible dilution of the refrigerant in the
environment, it is useful to raise the outlet point as high as pos-
sible and not to position it at ground level.
The zone around the outlet point must be cordoned off and in-
dicated by appropriate warning notices. In the fan flow direc-
tion for diluting the refrigerant, there must not be any ignition
sources, windows, doors, ventilation openings, light wells,
drainage openings or property boundaries.
Start drainage of the refrigerant with the service valve on

the low pressure side.
After a few minutes, move the expansion valve to the open

position using the permanent magnet.
 Then open the service valve on the high pressure side.
When drainage / extraction is complete, adequately flush

the entire device into a drainage zone with nitrogen using a
drain hose.
Evacuate to 20 mbar absolute pressure. Use vacuum

pumps suitable for R290. The blower (Ex zone II) must be
positioned in such a way that the vacuum pump is in the air
flow.
 Then break the vacuum with nitrogen.
If there is still refrigerant in the refrigeration circuit, repeat

the evacuation and flushing work steps. This must be
checked at all service valves in the refrigeration circuit.
The refrigeration circuit must always be opened with a pipe

cutter. Desoldering of components must not be carried
out.
 During soldering work, flush the area with an adequate
quantity of nitrogen.
Replace the filter dryer whenever any repair work is per-

formed on the open refrigeration circuit
After the repair work is complete, perform the following

tests before adding the refrigerant:

ated


 The leak detector must be suitable for the type of refriger-
ant being used.
During refrigerant emptying and filling, ensure that heating

water is being conveyed through the liquefier.
 Make sure that the filling fittings are not used for different
refrigerants. Hoses should be as short as possible to mini-
mise the quantity of refrigerant they contain.
452171.66.01-EN · FD 0212
Pressure test at solder connections that have been cre-
Leakage tightness test
Evacuate to an absolute pressure of 2.7 mbar or lower.
LA 1118CP
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