Electrical Connection; Electrical Installation - Dimplex LI 9TU Instructions D'installation Et D'utilisation

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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 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 terminal strip
X3; X5.1. 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 Connection of the mains cable to the
switch box of the heat pump via terminal X1: L1/L2/L3/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 characteris-
tic in compliance with the device information).
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 switch box 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 con-
tactor or be connected to the household current, as impor-
tant 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.
EN-10
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/M18 and X2/N. When using pumps
where the switching capacity exceeds the output, a cou-
pling relay must be interposed.
11) The return flow sensor is integrated into the heat pumps
and is connected to the heat pump manager via the control
line. The return flow sensor must be installed in the immer-
sion sleeve in the manifold only 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 terminals 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
domestic hot water cylinder and is connected to terminals
X3/GND and X3/R3.
7.5.3 Connecting an electronically
regulated circulating pump
Electronically regulated circulating pumps have high starting
currents, which may shorten the service life of the heat pump
manager. For this reason, a coupling relay is installed or must be
installed between the output of the heat pump manager and
the electronically regulated circulating pump. This is not neces-
sary 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 is-
sued by the pump manufacturer.
ATTENTION!
It is not permitted to connect more than one electronically
regulated circulating pump via a relay output.
452160.66.74 · FD 9912
LI 9TU - LI 12TU
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