Electrical Connection - Dimplex WI 65TU Installation And Operating Instruction

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7.5 Electrical connection

7.5.1 General
All electrical installation 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 to N1-J20; N1-J23 to N1-J26 and the terminal
strips X3. If, due to a wiring error, the line voltage is mistakenly
connected to these terminals, the heat pump manager will be de-
stroyed.
NOTE
For installation work on the switch box, ensure that the mains cable and
signal cables are inserted separately into the switch box. The specially
arranged switch box inlets must be used for this purpose (see Fig.7.4 on
pag. 8).
The mains cables and signal cables must also always be laid separately
in the switch box during wiring work.
Supply signal cable
extra-low voltage
Supply mains cable
line voltage
Fig. 7.4:Cable inlet switch box
EN-8
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452237.66.11 · FD 9908
7.5.2 Electrical connection
1) The four-core electrical supply cable for the heat pump
power part is fed from the heat pump electricity meter into
the heat pump via the utility company blocking contactor (if
required) (for supply voltage, see heat pump manual).
The mains cable is connected to the heat pump contact
plate via terminals X1: L1/L2/L3/PE.
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).
An all-pole disconnecting device with a contact gap of at least
3 mm (e.g. utility company 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 compliance with
the device information).
2) The three-core supply cable for the heat pump manager
(heating controller N1) is fed into the heat pump. Connection
of the control cable to the contact plate 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 continuous voltage. For this reason, it
should be tapped upstream from the utility company block-
ing contactor or be connected to the household current, as
important protection functions could otherwise be lost during
a utility block.
3) The utility company blocking contactor (K22) with main con-
tacts and an auxiliary contact must be designed and pro-
vided by the customer in accordance with the heat pump
output.
The NO contact of the utility company blocking contactor is
looped from the terminal strip X3/G to the plug-in 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 domes-
tic 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 ter-
minals X2/N and X2/K21.
6) The contactors mentioned above in points 3, 4 and 5 are in-
stalled in the electrical distribution system.
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7) All installed electric cables must have permanent wiring.
8) 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 ca-
pacity exceeds the output, a coupling relay must be inter-
posed.
9) The auxiliary circulating pump (M16) is activated via the con-
tact N1-J16/NO9. The connection points for the pump are
X2/M16 and X2/N. A coupling relay is already integrated in
this output.
10) The domestic hot water circulating pump (M18) is activated
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 coupling relay must
be interposed.
WI 65TU - WI 95TU
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