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7.5 Electrical connection
7.5.1 General
All electrical connection work may only be carried out by a
trained electrician or a person qualified for the tasks in hand in
accordance with the
installation and operating instructions,
country-specific installation requirements (e.g. VDE 0100)
technical connection requirements of the energy suppliers
and supply grid operators (e.g. TAB) and
the local conditions.
To ensure that the frost protection function of the heat pump
works properly, the heat pump manager must remain con-
nected 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-J19; N1-J20; N1-J23 to N1-J26 and the terminal
strips X3; X5.1. If, due to a wiring error, the line voltage is mis-
takenly connected to these terminals, the heat pump manager
will be destroyed
7.5.2 Electrical installation
1)
The supply cable (with up to 5 cores) for the power element
of the heat pump or the primary pump is routed from the
heat pump's electricity meter to the heat pump.
The cable for the heat pump is routed via the utility contac-
tor (if required). Connection of the mains cable is at the
control panel of the heat pump via the terminals: X1: L1/
L2/L3/N/PE or X1: L10/L20/L30/N0/PE. If no utility con-
tactor is used, the electrical loads are supplied via a shared
feed cable (bridge feeds using bridges supplied). The
power supplies are fitted with an all-phase disconnection
with at least 3 mm contact opening distance (e.g. utility
protection contactor, power contactor), as well as an all-
phase cutout switch, with shared activation of all external
conductors (release currents and characteristics in accord-
ance with device information; see circuit diagram for fur-
ther details).
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).
2)
The three-core electric supply cable for the heat pump
manager (heating controller N1) is fed into the heat pump.
Connection of the control line to the control panel of the
heat pump via terminal X2: L/N/PE.
Details on the power consumption of the heat pump are
listed on both the product information sheet and the type
plate.
The (L/N/PE ~230 V, 50 Hz) supply cable for the heat
pump manager must have a constant voltage. For this rea-
son, it should be tapped upstream from the utility blocking
contactor or be connected to the household current, as im-
portant protection functions could otherwise be lost dur-
ing a utility block.
EN-8
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 X3/
A1. CAUTION! Extra-low voltage!
4)
The contactor (K20) for the immersion heater (E10) of
mono energy systems (HG2) should be dimensioned ac-
cording 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 X2/K20.
5)
The contactor (K21) for the flange heater (E9) in the hot
water cylinder should be dimensioned according to the ra-
diator output and must be supplied by the customer. It is
controlled (230 V AC) by the heat pump manager via termi-
nals X2/N and X2/K21.
6)
The contactors mentioned above in points 3, 4 and 5 are
installed in the electrical distribution system. Mains cables
for the installed heaters must be laid and secured in ac-
cordance with the valid standards and regulations.
7)
All installed electric cables must have permanent wiring.
8)
The heat circulating pump (M13) is activated via the con-
tact N1-J13/NO5. The connection points for the pump are
X2/M13 and X2/N. When using pumps where the switch-
ing capacity exceeds the output, a coupling relay must be
interposed.
9)
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. When using pumps where the
switching capacity exceeds the output, a coupling relay
must be interposed.
10) The domestic hot water circulating pump (M18) is acti-
vated via the contact N1-J13/NO6. The connection points
for the pump are X2/M13 and X2/N. When using pumps
where the switching capacity exceeds the output, a cou-
pling relay must be interposed.
11) The brine or well pump (M11) is activated via the contact
N1-J12/NO3. The connection points for the pump are on
contactor K5:2/4/6. A coupling relay is already integrated
in this output.
12) A return sensor is integrated into the heat pump. The return
flow sensor must be installed in the immersion sleeve in the
manifold when a dual differential pressureless manifold is
used. The single-core wires are then connected to termi-
nals X3/GND and X3/ R2.1. Bridge A-R2 (situated between
X3/B2 and X3/1 when delivered) must then be moved to
terminals X3/1 and X3/2.
13) The external sensor (R1) is connected to terminals X3/GND
and X3/R1.
14) The domestic hot water sensor (R3) is included with the
domestic hot water cylinder and is connected to terminals
X3/GND and X3/R3.
452235.66.21 · FD 9912
WI 10TU - WI 22TU
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