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EN-8 452232.66.13 · FD 9603 www.dimplex.de
English
SI 5ME - SI 14ME
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-J24 and terminal strip X2; X3. If, due to a wiring er-
ror, 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 3-core) are fed from the electricity meter of the
heat pump via the utility blocking contactor (if required) into
the heat pump (see device Information for supply voltage).
Connection of the mains cable to the control panel of the
heat pump via terminal X1: L/N//PE.
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).
2) The three-core electric supply cable for the heat pump man-
ager (heating controller N1) is fed into the heat pump . Con-
nection of the control line to the control panel of the heat
pump via terminal X2: L/N/PE.
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 main contacts and
an auxiliary contact should be dimensioned according to the
heat pump output and must be supplied by the customer.
The NO contact of the utility blocking contactor is looped
from terminal strip X3/G to connector terminal J5/ID3. CAU-
TION! 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 N1-J13/NO4.
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 N1-J16/NO 10.
6) The contactors mentioned above in points 3, 4 and 5 are in-
stalled in the electrical distribution system. Mains cables for
the installed heaters must be laid and secured in accord-
ance with the valid standards and regulations.
7) All installed electric cables must have permanent wiring.
8) The heat circulating pump (M13) is connected to N1-J13/
NO5 and X2/N. When using pumps where the switching ca-
pacity exceeds the output, a coupling relay must be inter-
posed.
9) The auxiliary circulating pump (M16) is connected to N1-
J16/NO9 and X2/N. When using pumps where the switching
capacity exceeds the output, a coupling relay must be inter-
posed.
10) The domestic hot water circulating pump (M18) is connected
to N1-J18/NO6 and X2/N. When using pumps where the
switching capacity exceeds the output, a coupling relay must
be interposed.
11) The brine or well pump (M11) is connected to N1-J12/NO3
and X2/N. When using pumps where the switching capacity
exceeds the output, a coupling relay must be interposed.
12) The return sensor (R2) is integrated into heat pumps for in-
door installation.
The heat pump manager is connected via the following ter-
minals: X3/GND and N1-J2/B2.
13) The external sensor (R1) is connected to terminals X3/GND
and N1-J2/B1.
14) 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/B3.
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.
22


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