7 Maintenance
22
Installation instructions aroTHERM 0020147164_09
7.2
Preparing for maintenance
7.2.1
Procuring spare parts
The original components of the unit were also certified as
part of the CE declaration of conformity. Information about
available Vaillant genuine spare parts is available by contact-
ing the contact address provided on the reverse of this docu-
ment.
▶
If you require spare parts for maintenance or repair work,
use only Vaillant genuine spare parts.
7.3
Instructions before carrying out
maintenance work
Observe the basic safety rules before carrying out mainten-
ance work or installing spare parts.
Danger!
Risk of injury due to unauthorised access
to the refrigerant circuit.
Escaping refrigerant may cause freezing if
the exit point is touched.
▶
Only carry out work on the refrigerant cir-
cuit if you have been trained to do so and
if you have the required protective cloth-
ing.
▶
Avoid skin and eye contact with the refri-
gerant.
▶
Switch the system off.
▶
Disconnect the system from the power supply.
▶
Where necessary, disconnect the heating circuit from the
product by using the isolation valves.
▶
If you must replace parts on the heating circuit, drain the
product.
▶
When working on the product, protect all electric com-
ponents from spraying water.
7.4
Yearly maintenance
▶
Check that the safety devices are functioning properly.
▶
Check the heating circuit's filling pressure.
▶
Ensure that there are no traces of rust or oil on the refri-
gerant circuit components.
▶
Ensure that the product components are neither worn nor
defective.
▶
Check that all wires sit securely in the connection plugs.
▶
Check the product's earthing.
▶
Check the heating pump's flow temperature and the set
values.
▶
Remove any dust from the electronics box and the in-
verter box.
▶
Clean the ribbed pipe heat exchanger and ensure that air
circulates between the fins and around the product.
▶
Check that the fan rotates freely.
▶
Check that condensate can escape freely from the heat
pump by removing the adapter underneath the heat
pump.
▶
Clean the product as described in the operating instruc-
tions.
▶
Check that the vibration dampers are correctly seated on
the refrigerant pipes.
7.5
Cleaning the product
7.5.1
Cleaning the front
Warning.
Risk of injury due to sharp-edged casing.
The product's casing sections have sharp
edges.
▶
Wear gloves when installing or dismant-
ling the product's casing sections.
3
4
5
3.
6.
5.
1
2
1.
Remove the side casing. (
2.
Remove both screws
(1)
.
3.
Lift off the cover.
4.
Remove both screws
(2)
on the right front casing.
5.
Remove the right front casing.
6.
Lift the louvred grill
(3)
upwards.
7.
Remover the fan grill casing
(4)
.
8.
Remove the nut
(5)
from the fan.
9.
Remove the fan.
10. Clean the product and the finned-pipe heat exchanger.
7.5.2
Cleaning the back
Warning.
Risk of injury due to sharp-edged casing.
The product's casing sections have sharp
edges.
▶
Wear gloves when installing or dismant-
ling the product's casing sections.
