Heat Pump Control Unit Power Supply 230 V - Viessmann Vitocal 300-A Installation And Service Instructions Manual

Installation sequence
Power supply
(cont.)
Danger
Incorrect core assignment can lead to serious
injury from electrical current and result in appli-
ance damage.
Never interchange cores "L" and "N".
In negotiations with your power supply utility, differ-
■
ent supply tariffs for the main power circuits may be
offered.
Observe the technical connection conditions of the
power supply utility.
■ If the compressor and/or instantaneous heating
water heater are operated at an economy tariff
(power-OFF), either provide an additional cable (e.g.
2
3 x 1.5 mm ) for the power-OFF signal from the dis-
tribution board (meter box) to the heat pump control
unit.
or
Combine the cables for the power-OFF signal and
for the heat pump control unit power supply
2
(3 x 1.5 mm ) 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 for a maxi-
mum of 3 x 2 hours per day (24 h).
■ The heat pump control unit/PCB must be supplied
without power-OFF. Tariffs subject to possible shut-
down must not be used here.

Heat pump control unit power supply 230 V~

A
max.16 A
X3.18 L1
X2.1 N
X1.1
?
Fig. 33
Mains terminals inside the heat pump control unit
A
Note
This supply must never be blocked.
40
1/N/PE
230 V / 50 Hz
When using power generated on site (use of power
■
generated by the PV system to meet own require-
ments):
During the power-OFF period, it is not possible to
operate the compressor utilising power generated on
site.
Protect the power cable to the heat pump control unit
■
with an MCB/fuse of max. 16 A.
■ For accessories and external components that will
not be connected to the heat pump control unit, pro-
vide the power supply via the same MCB/fuse, or at
least on the same phase, as the heat pump control
unit.
Connection to the same MCB/fuse provides addi-
tional safety when the power is switched off.
Observe the power consumption of the connected
consumers.
■ The PE wire of the power cable must be approx.
10 mm longer than the N and L wires.
Information regarding the compressor power sup-
ply
!
■ Please note
An incorrect phase sequence can cause dam-
age to the appliance.
Make the compressor power supply only in
the phase sequence specified (see terminals)
with a clockwise rotating field.
■ Characteristics of the compressor power fuses: see
"Specification".
Max. fuse rating 16 A
■
■ Standard tariff: No optional economy tariff with
power-OFF for the heat pump control unit
■ Recommended power cable:
3 x 1.5 mm 2
Recommended power cable with power-OFF for
■
compressor/ instantaneous heating water heater:
2
5 x 1.5 mm