Electrical Connection; Frost Protection - Dimplex La 1118Cp Montage- Und Gebrauchsanweisungen

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7.6 Electrical connection

7.6.1 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 can only be briefly dis-
connected from the power supply and the flow must be main-
tained through the heat pump.
All supply cables on the heat pump must be fed into the con-
nection socket through the designated free cable glands. The
cables must be secured with strain relief.
7.6.2 Electrical installation work
3 lines/cables must be routed to the heat pump in total:
The heat pump is connected to the power using a com-

mercially available 5-wire cable.
The cable must be provided on-site. The line cross section
is selected in accordance with the power consumption of
the heat pump (see attachment Device Information) and
the applicable VDE (EN) and VNB regulations. All pole dis-
connection with minimum 3 mm contact gap (e.g. utility
company blocking contactor, power contactor) must be
fitted in the power supply for the heat pump.
A 3-pole circuit breaker with common tripping of all phase
conductors (tripping current according to Device Informa-
tion) provides short-circuit protection, taking into consid-
eration the design of the internal wiring.
The relevant components in the heat pump receive internal
overload protection.
The clockwise rotating field of the load supply must be en-
sured when connecting.
Phase sequence: L1, L2, L3.
 The control voltage is supplied via the heat pump manager
(controller -N1).
To this end, a 3-pole cable should be routed as shown in
the electrical documentation. Further information on the
wiring of the heat pump manager is available in the heat
pump manager operating instructions.
 A shielded communication line (J-Y(ST)Y ..LG) (not in-
cluded in the scope of supply) connects the heat pump
manager (controller -N1) with the refrigerant circuit con-
troller -N0 installed in the heat pump. More detailed in-
structions can be found in the heat pump manager operat-
ing instructions and in the electrical documentation.
NOTE
The communication cable is necessary for the function of air-
to-water heat pumps in outdoor installation. It must be
shielded and laid separately from the mains cable
EN-20
7.6.3 Demand sensor connection
The demand sensor R2.2 (NTC 10) is included with the heat
pump manager (controller -N1). It must be installed depending
on the hydraulics used (see cap. 17 on page 38).
If a demand sensor is not connected, the second heat genera-
tor cannot be controlled with the heat pump manager in the
event of an interruption in communication either.
NOTE
The return sensor R2 installed in the heat pump is active when
the compressor is running and must not be disconnected.
NOTE
Sensor cables can be extended up to 50 m with 2 x 0.75 mm
cables.
7.6.4 High-performance circulating pump
In many cases, the supply voltage of the pump is stuck on con-
tinuous current when using larger electronically controlled cir-
culating pumps (the manufacturer's information on the pump
being used should be taken into consideration). The pump is
then generally actuated using the Start/Stop input. This input is
operated with extra low voltage from the pump (a link cable is
usually inserted in the factory default of the pump). In order to
be able to actuate the input, a coupling relay with a floating
contact is required. This must be controlled with the pump
function of a 230 V relay output of the controller. Due to the
extra low voltage to be switched, a suitable relay with the ap-
propriate contact material (gilded) must be selected and inte-
grated on-site.

7.6.5 Frost protection

Regardless of the settings for the heat circulating pumps, they
always run in heating, defrost and frost protection mode. In sys-
tems with multiple heating circuits, the 2nd and 3rd heat circu-
lating pump has the same function.
CAUTION!
Risk of damage.
When the heat pump manager has no voltage, there is no
longer any flow through the heat pump and damage can
occur due to frost.
 To ensure the frost protection function on the heat pump,
do not disconnect the heat pump manager from the
voltage.
 The primary pump M11, the secondary pump M16 and, if
necessary, the heat circulating pump M13 may only be
clamped onto the heat pump manager.
452171.66.01-EN · FD 0212
connection
LA 1118CP
www.dimplex.de