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▶
Note that removed components may release refrigerant
for an extended period. Only store and transport these
components in well-aerated locations.
12.7.3 Installing components of the refrigerant
circuit
▶
Only use Vaillant original spare parts.
▶
Install the component correctly. To do this, use only sol-
dering processes.
▶
Install a filter dryer outdoors in the liquid pipe to the out-
door unit.
▶
Carry out a pressure test of the refrigerant circuit using
nitrogen.
12.7.4 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 R32. The refrigerant may mix with air
to form a flammable atmosphere. There is
a risk of fire and explosion. In the event of a
fire, toxic or corrosive substances, such as
carbonyl fluoride, carbon monoxide or hydro-
gen fluoride, are produced.
▶
Only carry out the work if you are compet-
ent at handling R32 refrigerant.
▶
Wear suitable personal protective equip-
ment and bring a fire extinguisher with
you.
▶
Only use tools and units that are permitted
for R32 refrigerant and are in proper work-
ing condition.
▶
Ensure that no air gets into the refrigerant
circuit, into refrigerant-carrying tools or
units, or into the refrigerant cylinder.
1.
Make sure that the product is earthed.
2.
Procure the tools and units that are required for filling
with refrigerant:
–
Vacuum pump
–
Refrigerant cylinder
–
Calibrated refrigerant scales
3.
Only use tools and units that are permitted for R32
refrigerant. Only use refrigerant cylinders that are la-
belled accordingly.
4.
Only use hoses, couplings and valves that are leak-
tight and in proper working condition. Check the tight-
ness using a gas sniffer.
5.
Only use hoses that are as short as possible in order to
minimise the refrigerant volume that they can hold.
6.
Flush the refrigerant circuit with nitrogen.
7.
Drain the refrigerant circuit.
8.
Fill the refrigerant circuit with R32 refrigerant. The re-
quired fill quantity is specified on the product's data
plate. Ensure in particular that the refrigerant circuit is
not overfilled.
9.
Check the refrigerant circuit for leak-tightness using a
gas sniffer. In doing so, check all of the components
and pipelines.
8000017440_FT Installation and maintenance instructions
12.8
Replacing electrical components
1.
Protect all of the electrical components against spray-
ing water.
2.
Only use insulated tools that allow you to work safely
up to 1000 V.
3.
Only use Vaillant original spare parts.
4.
Replace the defective electrical component correctly.
5.
Carry out a repeat electrical test in accordance with
EN 50678.
12.9
Completing repair and service work
▶
Installing the casing sections.
▶
Switch on the disconnector to which the product is con-
nected in the building.
▶
Start up the product. Temporarily activate the heating
mode.
▶
Use a gas sniffer to check the tightness of the product.
13 Decommissioning
13.1
Temporarily decommissioning the product
1.
Switch off the disconnector to which the product is con-
nected in the building.
2.
Disconnect the product from the power supply.
13.2
Permanently decommissioning the product
1.
Switch off the disconnector to which the product is con-
nected 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 indoor unit.
4.
Remove the casing sections.
5.
Remove the refrigerant from the product.
(→ Page 233)
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.
Installing the casing sections.
8.
Label the product using a sticker that is visible from the
outside.
9.
Note down on the sticker that the product has been
decommissioned and that the refrigerant has been
completely removed. Sign the sticker and specify the
date.
10.
Recycle the removed refrigerant in accordance with the
regulations. Note that the refrigerant must be cleaned
and checked before it is used again.
11.
Dispose of or recycle the product and its components
in accordance with the regulations.
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