54
Isolators for non-earthed conductors
■ The mains isolator (if installed) must
simultaneously isolate from the mains
all non-earthed conductors with a min-
imum contact separation of 3 mm.
■ We additionally recommend installing
an AC/DC-sensitive RCD, type B
, for DC (fault) currents that can
occur with energy efficient equipment.
■ RCDs of type A must
not
be used or
installed upstream of the RCD type B.
■ If
no
mains isolator is installed, all non-
earthed conductors must be isolated
from the mains by the upstream circuit
breakers with a minimum contact sep-
aration of 3 mm.
Danger
Incorrectly executed electrical
installations can result in injuries
from electrical current and in
appliance damage.
Connect the power supply and
implement all safety measures
(e.g. RCD circuit) in accordance
with the following regulations:
■ IEC 60364-4-41
■ VDE regulations
■ Technical connection require-
ments specified by the local
power supply utility
Danger
If system components are not
earthed, serious injury from elec-
tric current can result if an elec-
trical fault occurs.
Connect the appliance and pipe-
work to the equipotential bonding
of the building in question.
Danger
Incorrect core allocation can
result in serious injury and dam-
age to the appliance.
Never interchange cores "L" and
"N".
■ In negotiations with your power supply
utility, different supply tariffs for the
main power circuits may be offered.
Observe the technical connection con-
ditions of the power supply utility.
■ If the compressor and/or instantane-
ous heating water heater are operated
at an economy tariff (power-OFF),
either provide an additional cable (e.g.
3 x 1.5 mm
2
) for the power-OFF signal
from the distribution board (meter box)
to the heat pump control unit
or
Combine the cable for the power-OFF
signal and for the heat pump control
unit power supply (3 x 1.5 mm
2
) in a 5-
core cable.
■ The assignment of the power-OFF (for
compressor and/or instantaneous
heating water heater) is made via the
type of connection and by setting
parameters in the heat pump control
unit.
In Germany, the power supply can be
cut off for up to 3 x 2 hours per day
(24 h).
■ The
heat pump control unit/PCB
must be supplied
without
power-OFF.
Tariffs subject to possible shutdown
must not be used here.
Installation sequence
Power supply
5546 699 GB
