61
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.
■ In addition, we recommend the instal-
lation of an AC/DC-sensitive residual
current device (FI category B
)
for DC fault currents that may be
caused by energy efficient equipment.
■ If
no
mains isolator is installed, all non-
earthed conductors must be isolated
from the mains by the upstream circuit
breaker 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 [IEE or local
regulations]
■ Technical connection require-
ments of the local power supply
utility
■ Protect the power supply to the
heat pump control unit with a
fuse of 16 A (max.).
Danger
The absence of component
earthing can lead to serious injury
from electric current if an electri-
cal 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
requirements of the power supply util-
ity.
■ 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 allocation 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).
Installation sequence
Power supply
5623 661 GB
Installation
