Viessmann VITOLIGNO 300-C Installation And Service Instructions Manual page 19

Fitting the programming unit
1.
Fig. 12
!
Please note
An incorrectly routed display ribbon cable can
cause system damage.
■ Do not kink or crush the ribbon cable.
■ Route the ribbon cable (safety extra low volt-
age, SELV) at a sufficient distance from the
mains voltage.
Pull the ribbon cable out of the control unit
■
enclosure as far as possible.
!
Please note
Cutting or kinking the pipeline (capillary) of the
high limit safety cut-out (STB) can cause the
heating system to fail permanently.
■ Observe the 5 mm minimum bending radius of
the pipeline.
■ If the pipeline is kinked or damaged, replace
the high limit safety cut-out.
1. Fit the programming unit.
Note
Unhook and remove the securing straps on the
programming unit.
2. Plug the ribbon cable of the programming unit into
connector aYÖ of the KSK 2.03 PCB.
3. Secure the cover of the control unit enclosure with
screws.
Installation sequence
19