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Installation and maintenance instructions 0020326637_00
in order to ensure that the refrigerant circuit is com-
pletely drained.
12.3
Removing components of the refrigerant
circuit
▶
Flush the refrigerant circuit with nitrogen.
▶
Drain the refrigerant circuit.
▶
Repeat the process of rinsing with nitrogen and draining
until there is no longer any refrigerant in the refrigerant
circuit.
▶
If you want to remove the compressor in which the com-
pressor oil is located, use sufficient negative pressure
to drain it for long enough to guarantee that there is no
longer any combustible refrigerant in the compressor oil.
▶
Establish the atmospheric pressure.
▶
Use a pipe cutter to open the refrigerant circuit. Do not
use soldering equipment or sparking or chipping tools.
▶
Remove the component.
▶
Note that removed components could continue to release
refrigerant for a long time due to outgassing from the
compressor oil contained in the components. This applies
in particular for the compressor. Only store and transport
these components in well-aerated locations.
12.4
Installing components of the refrigerant
circuit
▶
Install the component correctly. To do this, use only sol-
dering processes.
▶
Carry out a pressure test of the refrigerant circuit using
nitrogen.
12.5
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
refrigerant. Only use refrigerant cylinders that are la-
belled accordingly.
3.
Only use hoses, couplings and valves that are leak-
tight and in proper working condition. Check the tight-
ness 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
required fill quantity is specified on the product's data
plate. Ensure in particular that the refrigerant circuit is
not overfilled.
8.
Check the refrigerant circuit for leak-tightness using a
gas sniffer. In doing so, check all of the components
and pipelines.
12.6
Completing repair and service work
▶
Installing the casing sections.
▶
Switch on the power supply and the product.
▶
Start up the product. Temporarily activate the heating
mode.
▶
Check the product for leak-tightness using a gas sniffer.
13 Decommissioning
13.1
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 wa-
ter from the product.
13.2
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.
