Checking The Expansion Vessel And Heating Circuit Pressure; Checking External Unit Condensate Pan For Free Drainage 12. Checking The Free Running Of The Fan In The External Unit; Cleaning The External Unit Heat Exchanger (Evaporator) - Viessmann VITOCAL 200-S Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps

Checking the expansion vessel and heating circuit pressure

Observe engineering informa-
tion.
Vitocal technical guide
Checking the free running of the fan in the external unit
Danger
Starting the fan with the external
unit open can lead to severe inju-
ries.
Isolate the external unit from the
power supply and safeguard
against reconnection.
Be aware there may be a fan run-
ning downstream.

Cleaning the external unit heat exchanger (evaporator)

Danger
Touching 'live' components and
their contact with water can result
in severe injury due to electric
shock.
Isolate the external unit from the
power supply and safeguard
against reconnection.
Be aware that the fan may run
on.
Cleaning with compressed air
1. Open the casing of the external unit.
!
Please note
The sharp edges of the heat
exchanger can cause inju-
ries.
Avoid contact with the heat
exchanger.
78
(cont.)
1. ■ Type AWB/AWB-AC 201.B04:
First remove the top cover, then the
front panel.
■ Type AWB/AWB-AC 201.B07,
201.B10, 201.B13:
Remove the air discharge grille
from the external unit.
2. Turn the fan by hand.
!
2. Please note
Excessive air pressure from
the front and sides can result
in the deformation of the alu-
minium fins of the heat
exchanger.
Only point the compressed air
gun at the heat exchanger
from the front and at an ade-
quate distance.
Blow out the heat exchanger from
the inside out with compressed air.
3. Check the aluminium fins of the heat
exchanger for deformation and
scratches; if necessary, repair with a
suitable tool (e.g. fin comb).
4. Close the casing of the external unit.