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7.5 Electrical connection
7.5.1 General
All electrical connection work must be carried out by a trained
electrician or a specialist for the specified tasks in accordance
with the
installation and operating instructions,
country-specific installation regulations (e.g. VDE 0100),
technical connection conditions of the energy suppliers and
supply grid operators (e.g. TAB) and
local conditions.
To ensure that the frost protection function of the heat pump
works properly, the heat pump manager must remain connected
to the power supply and the flow must be maintained through the
heat pump at all times.
The switching contacts of the output relay are interference-
suppressed. Therefore, depending on the internal resistance of
the measuring instrument, a voltage can also be measured when
the contacts are open. However, this will be much lower than the
line voltage.
Extra-low voltage is connected to controller terminals N1-J1 to
N1-J11; N1-J24 to N1-J26 and terminal strip X3. If, due to a
wiring error, the line voltage is mistakenly connected to these
terminals, the heat pump manager will be destroyed.
7.5.2 Electrical installation
1)
The electric supply cable for the output section of the heat
pump (up to 5-core) is fed from the electricity meter of the
heat pump via the utility blocking contactor (if required) into
the heat pump (see heat pump operating instructions for
supply voltage). As delivered, the power supply can be
taken from a common mains circuit. As an option, the heat
pump and the second heat generator can be powered by
separate cables, provided that the bridges are removed from
the supply terminals (see circuit diagram in the appendix).
An all-pole disconnecting device with a contact gap of at
least 3 mm (e.g. utility blocking contactor or power contac-
tor) and an all-pole circuit breaker with common tripping for
all external conductors must be installed in the power supply
for the heat pump (tripping current and characteristic in com-
pliance with the device information).
When connecting the device, ensure that the incoming sup-
ply has a clockwise rotating field L1; L2; L3; L10; L20; L30.
ATTENTION!
Ensure that there is a clockwise rotating field: With incorrect wiring the
starting of the heat pump is prevented. A corresponding warning is
indicated on the display of the heat pump manager (adjust wiring).
On delivery, the 2nd heat generator is connected with a
6 kW heat output. To reduce the output to 4 kW or 2 kW, the
copper bridges must be removed according to the circuit di-
agram.
For detailed information, refer to the circuit diagrams in the
appendix Cap. 3.2 on pag. VII.
2)
The three-core electric supply cable for the heat pump
manager (heating controller N1) is fed into the heat pump.
The correct control voltage must be ensured according to
the type plate. The (L/N/PE~230 V, 50 Hz) supply cable for
the heat pump manager must have a constant voltage. For
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this reason, it should be tapped upstream from the utility
blocking contactor or be connected to the household
current, as important protection functions may otherwise be
lost during a utility block.
3)
The utility blocking contactor (K22) with 3 main contacts (1/
3/5 // 2/4/6) and an auxiliary contact (NO contact 13/14)
should be dimensioned according to the heat pump output
and must be supplied by the customer.
The NO contact of the utility blocking contactor (13/14) is
looped from terminal strip X3/G to connector terminal N1-J5/
ID3. CAUTION! Extra-low voltage!
4)
The contactor (K21) for the flange heater (E9) in the hot
water cylinder should be dimensioned according to the
radiator output and must be supplied by the customer. It is
controlled (230 V AC) by the heat pump manager via
terminals X2/N and N1-J16/NO10.
5)
The contactors mentioned above in points 3 and 4 are
installed in the electrical distribution system. Mains cables
for the installed heaters must be laid and secured in
accordance with the valid standards and regulations.
6)
All installed electric cables must have permanent wiring.
7)
The heat circulating pump (M13) is activated via the contact
N1-J13/NO5. The connection points for the pump are
X2/M13 and X2/N. When using pumps where the switching
capacity exceeds the output, a coupling relay must be
interposed.
8)
The auxiliary circulating pump (M16) is activated via the
contact N1-J16/NO9. The connection points for the pump
are X2/M16 and X2/N. A coupling relay is already integrated
in this output.
9)
The domestic hot water circulating pump (M18) is activated
via the contact N1-J18/NO6. The connection points for the
pump are X2/M18 and X2/N. When using pumps where the
switching capacity exceeds the output, a coupling relay must
be interposed.
10) The return sensor (R2) is integrated into air-to-water heat
pumps for indoor installation.
The connection to the HPM is made at terminals X3/GND
and N1-J2/U2.
11) The external sensor (R1) is connected to terminals X3/GND
and N1-J2/U1.
12) The domestic hot water sensor (R3) is included with the do-
mestic hot water cylinder and is connected to terminals X3/
GND and N1-J2/U3.
7.5.3 Connecting an electronically
regulated circulating pump
Electronically regulated circulating pumps have high starting cur-
rents, which may shorten the service life of the heat pump man-
ager. For this reason, a coupling relay is installed or must be in-
stalled between the output of the heat pump manager and the
electronically regulated circulating pump. This is not necessary if
the permissible operating current of 2 A and a maximum starting
current of 12 A are not exceeded in the electronically regulated
circulating pump or if express approval has been issued by the
pump manufacturer.
ATTENTION!
It is not permitted to connect more than one electronically regulated
circulating pump via a relay output.
452161.66.02 · FD 9601
LI 9TES
EN-11
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