EN-8 452234.66.46 · FD 9306
English
SMW-XP-50TU - SMW-XP-100TU
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-sup-
pressed. 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; N1-J24 and the terminal strips
X3. If, due to a wiring error, the line voltage is mistakenly con-
nected to these terminals, the heat pump manager will be de-
stroyed
7.5.2 Electrical installation
1)
The electric supply cables (with up to 4-core) for the power
element of the heat pump or the primary pump are routed
from the heat pump's electricity meter to the heat pump. The
cable for the heat pump is routed via the utility contactor (if
required). Connection of the mains cable is at the control
panel of the heat pump via the terminals: X1: L1/L2/L3/PE or
X1: L11/L21/L31/PE.
The power supplies are fitted with an all-phase disconnec-
tion 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 further
details).
ATTENTION!
Ensure the rotary field is clockwise when connecting the mains cables (if
the rotary field is not clockwise, the heat pump will not work properly, is
very loud and may cause damage to the compressor).
2)
The three-core electric supply cable for the heat pump man-
ager (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 reason, it
should be tapped upstream from the utility blocking contac-
tor or be connected to the household current, as important
protection functions could 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 X3/A1.
CAUTION! Extra-low voltage!
4)
The contactor (K20) for the immersion heater (E10) of mono
energy systems (HG2) 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 ter-
minals 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 radi-
ator output and must be supplied by the customer. It is con-
trolled (230 V AC) by the heat pump manager via terminals
X2/N and
X2/K21.
6)
The contactors mentioned above in points 3, 4 and 5 are in-
stalled in the electrical distribution system. The mains cable
for the installed pipe heater 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 connected to terminals
X2/N and X2/M13.
9)
The DHW loading pump (M18) is connected to terminals X2/
N and X2/M18.
10) The brine and/or well pump (M11) is connected to terminals
2/4/6 of K5 and PE.
11) 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 terminals
X3/GND and X3/ R2.1. Bridge A-R2 (situated between X3/
B2 and X3/1 when delivered) must then be moved to termi-
nals X3/1 and X3/2.
12) The external sensor (R1) is connected to terminals X3/GND
and X3/R1.
13) The domestic hot water sensor (R3) is included with the do-
mestic hot water cylinder and is connected to terminals X3/
GND and X3/R3.
All lines must be fed into the device from the back and secured
at the switch box using cable connectors. They must additionally
be secured with a strain relief.
