Checking Electrical Connections Of The External Unit; For Firm Seating - Viessmann VITOCAL 242-S Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps
!
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 from an
adequate distance.
Clean the heat exchanger from the
inside out with compressed air.
Checking electrical connections of the external unit for firm seat-
ing
Danger
Contact with 'live' components
can result in severe injuries.
Capacitors remain 'live' after the
power supply has been switched
OFF.
Wait at least 4 min, until the
capacitors have discharged,
before starting work on the exter-
nal unit.
76
(cont.)
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.