Vaillant VR 92/3 Manual De Uso E Instalación página 29

3 -- Set-up, electrical
installation
3.1 Requirements for the eBUS line
Observe the following rules when routing
the eBUS lines:
▶
Use twin-core cables.
▶
Never use shielded or twisted cables.
▶
Use only appropriate cables, e.g. NYM
or H05VV (-F/-U).
▶
Observe the permissible total length of
125 m. In this case, a conductor cross-
section of ≥ 0.75 mm² up to 50 m total
length and a conductor cross-section of
1.5 mm² from 50 m.
In order to prevent faults in the eBUS sig-
nals (e.g. due to interferences):
▶
Maintain a minimum clearance of
120 mm to power supply cables or other
electromagnetic sources of interference.
▶
For parallel routing to mains connection
lines, guide the cables in accordance
with the applicable regulations, e.g. on
cable trays.
▶
Exceptions: For wall breaks and in the
electronics box, it is acceptable to not
reach the minimum clearance.
0020287935_02 Operating and installation instructions
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