Electrical Installation; Safety And Installation Information; Regulations Pertaining To Electrical Installations - Vaillant geoTHERM VWS Installation Instructions Manual

6 Electrical installation

6 Electrical installation
6.1

Safety and installation information

e
Danger!
Risk of electric shock!
Always switch off all power supplies be-
fore carrying out electrical installation
work. Make sure that they are secured
against inadvertent switching on again.
e Danger!
Risk of electric shock!
The electrical connection must be equip-
ped with a customer-supplied isolation
device having a contact separation of at
least 3 mm on all lines (e.g. a line pro-
tection switch).
It makes sense to fit this isolation device in the immedi-
ate vicinity of the heat pump.
a
Caution!
Risk of damage!
The electrical installation may only be
undertaken by an authorised engineer.
a Caution!
Risk of short circuits!
When connecting 230 V lines to the
ProE plug, do not strip the insulation
back by more than 30 mm for safety re-
asons.
If you strip back by more than this,
there is a risk of short circuits to the
PCB if the lines are not correctly atta-
ched in the plug.
24
a Caution!
Risk of malfunction!
The lines for the outside temperature
sensor and the room thermostat carry
small, weak currents. Interference from
the environment can have an effect on
the sensor lines and transmit incorrect
information to the heat pump controller,
and for this reason the sensor lines
must be run absolutely correctly.
Low current lines must be run at an ade-
quate distance from high current lines. If
low and high current lines are run in par-
allel, a minimum distance of 25 cm ap-
plies for lengths greater than 10 m.
Furthermore, take note:
– For power, connect the heat pump to a 230 V mains
supply with one neutral and one earth conductor.
Fuse this connection as specified in the technical data.
– Install the heat pump with a fixed mains connection.
– The required conductor cross sections must be deter-
mined by a qualified technician, using the values spe-
cified in the technical data for the maximum rated
output. In any case, take into account the on-site in-
stallation conditions.
– If the local power company stipulates that the heat
pump should be controlled by a blocking signal, fit an
appropriate contact switch, as specified by the power
company, and connect it to the heat pump with a two-
core cable.
6.2 Regulations pertaining to electrical installa-
tions
The maximum sensor cable length of 50 m may not be
exceeded.
Where lengths are greater than 10m, route the connec-
tion cables carrying 230V separately from the sensor or
bus cables.
Do not use free terminals on the appliance as support
terminals for other wiring.
Installation instructions geoTHERM VWS 0020046310_01