Operating instructions

29
General information regarding the power supply
Information regarding the compres-
sor power supply
■
!
Please note
An incorrect phase sequence
can cause damage to the unit.
Make the compressor power
supply only in the phase
sequence specified (see termi-
nal) with a clockwise rotating
field.
■ If full wave soft starter is installed (see
type plate), the compressor power
fuses must have Z characteristics.
■ If compressor and/or instantaneous
heating water heater (accessory) are
operated at a lower tariff (power-OFF),
provide an additional cable (e.g.
NYM 3 x 1.5 mm
2
) for the power-OFF
signal from the distribution board
(meter box) to the control unit.
Information regarding the control unit
power supply
■ Protect the power supply to the control
unit with no more than 16 A.
■ For accessories and external compo-
nents which are not to be connected to
the control unit, we recommend mak-
ing the power connection to the same
fuse, but with at least the same phase
as the control unit.
Connection to the same fuse/MCB
provides additional safety when the
power is switched off. Observe the
power consumption of the consumers
connected (see page 141).
■ The power supply to the control unit
(3 x 1.5 mm
2
) and the cable for the
power-OFF signal can be combined in
a five-core cable. Observe the techni-
cal connection requirements of the
power supply utility.
Information regarding the power sup-
ply utility
■ In negotiations with your power supply
utility, different supply tariffs for the
main power circuits may be offered.
■ The control unit/electronics feed
must be implemented without possi-
ble blocking from the power supply util-
ity; tariffs that are subject to possible
shutdowns must not be applied to
these feeds.
■ The allocation of the power-OFF (for
compressor and/or instantaneous
heating water heater) is made via the
type of connection and by a setting in
the control unit (see pages 31 and
97). In Germany, the power supply
can be cut off for up to 3 x 2 hours
within any 24 h period.
Installation sequence
Power supply
(cont.)
5441 603 GB
Installation