14 Decommissioning
132
Installation and maintenance instructions aroTHERM plus 0020297937_01
1.
Procure the tools and units that are required for remov-
ing the refrigerant:
–
Extraction station
–
Vacuum pump
–
Recycling cylinder for refrigerant
–
Manometer bridge
2.
Only use tools and units that are permitted for R290
refrigerant.
3.
Use only recycling cylinders that are approved for R290
refrigerant, have been labelled appropriately, and are
equipped with a pressure relief and isolation valve.
4.
Only use hoses, couplings and valves that are leak-tight
and in proper working condition. Check the tightness
using a suitable gas sniffer.
5.
Drain the recycling cylinder.
6.
Extract the refrigerant. Take into account the maximum
fill quantity of the recycling cylinder, and monitor the fill
quantity using calibrated scales.
7.
Ensure that no air gets into the refrigerant circuit, into
refrigerant-carrying tools or units, or into the recycling
cylinder.
8.
Connect the manometer bridge to both the high-pres-
sure side and the low-pressure sides of the refrigerant
circuit and make sure that the expansion valve is open
in order to ensure that the refrigerant circuit is com-
pletely drained.
13.5
Filling the product with refrigerant
Danger!
Risk of death caused by fire or explosion
when filling with refrigerant!
The product contains the combustible refri-
gerant R290. The refrigerant may mix with air
to form a flammable atmosphere. There is a
risk of fire and explosion.
▶
Only carry out the work if you are compet-
ent at handling R290 refrigerant.
▶
Wear suitable personal protective equip-
ment and bring a fire extinguisher with
you.
▶
Only use tools and units that are permitted
for R290 refrigerant and are in proper
working condition.
▶
Ensure that no air gets into the refrigerant
circuit, into refrigerant-carrying tools or
units, or into the refrigerant cylinder.
Caution.
Risk of material damage when using the
incorrect refrigerant or contaminated refri-
gerant.
The product may be damaged if it is filled
with the incorrect refrigerant or contaminated
refrigerant.
▶
Use only R290 refrigerant that has not
been used before and is specified as
such, and the purity of which is at least
99.5%.
1.
Procure the tools and units that are required for filling
with refrigerant:
–
Vacuum pump
–
Refrigerant cylinder
–
Scales
2.
Only use tools and units that are permitted for R290 re-
frigerant. Only use refrigerant cylinders that are labelled
accordingly.
3.
Only use hoses, couplings and valves that are leak-tight
and in proper working condition. Check the tightness
using a suitable gas sniffer.
4.
Only use hoses that are as short as possible in order to
minimise the refrigerant volume that they can hold.
5.
Flush the refrigerant circuit with nitrogen.
6.
Drain the refrigerant circuit.
7.
Fill the refrigerant circuit with R290 refrigerant. The re-
quired fill quantity is specified on the product's data
plate. Ensure in particular that the refrigerant circuit is
not overfilled.
14 Decommissioning
14.1
Temporarily decommissioning the product
1.
Switch off all of the disconnectors to which the product
is connected in the building.
2.
Disconnect the product from the power supply.
3.
If there is a risk of frost damage, drain the heating water
from the product.
14.2
Permanently decommissioning the product
Danger!
Risk of death caused by fire or explosion
when transporting units that contain refri-
gerant!
The product contains the combustible refri-
gerant R290. When transporting units without
their original packaging, the refrigerant circuit
may be damaged and refrigerant may be re-
leased. When mixing with air, a combustible
atmosphere may form. There is a risk of fire
and explosion.
▶
Ensure that the refrigerant is correctly
removed from the product transport.
1.
Switch off all of the disconnectors to which the product
is connected in the building.
2.
Disconnect the product from the power supply but en-
sure that the product is still earthed.
3.
Drain the heating water from the product.
4.
Remove the top casing, the front casing and the right-
hand side casing.
5.
Remove the refrigerant from the product. (
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Page 131)
6.
Note that refrigerant will continue to escape even after
the refrigerant circuit is completely drained due to out-
gassing from the compressor oil.
7.
Install the right-hand side casing, the front casing and
the top casing.
