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LA 1422C
6.4 Electrical connection
6.4.1 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 supplier
and supply grid operator (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.
Controller terminals -N0/J2..J15; -N1/J1..15, J25 and J26 or
the LV adapter boards are connected to extra-low voltage. If,
due to a wiring error, the line voltage is mistakenly connected to
these points, the controller will be destroyed.
6.4.2 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. An all-pole
disconnecting device with a contact gap of at least 3 mm
(e.g. utility blocking contactor or power contactor) must be
installed in the heat pump power supply. A 3-pole circuit
breaker with common tripping of all phase conductors
(tripping current according to Device Information) provides
short-circuit protection, taking into consideration the de-
sign 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.
CAUTION!
Ensure that there is a clockwise rotating field: With incorrect
wiring, starting of the heat pump is prevented. A
corresponding warning is indicated on the display of the heat
pump manager (adjust wiring).
The control voltage is supplied via the heat pump manager.
To this end, a 3-pole line should be routed following the
electrics documentation. Further information on the wiring
of the heat pump manager is available in the heat pump
manager operating instructions.
www.dimplex.de
A shielded communication line (not included in the scope
of supply) connects the heat pump manager with the re-
frigeration circuit controller installed in the heat pump.
More detailed instructions can be found in the heat pump
manager operating instructions and in the electrical docu-
mentation.
NOTE
The communication cable is necessary for the function of air-
to-water heat pumps. It must be shielded and laid separately
from the mains cable.
6.4.3 Demand sensor connection
The demand sensor R2.2 (NTC 10) is included with the heat
pump manager. It must be installed depending on the hydrau-
lics used (see attachment, Chap. 3 for S. V).
If no demand sensors are connected, then, in the event of an in-
terruption in communication with the heat pump manager, it is
possible that there will not be any control of the 2nd heat gen-
erator 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.
6.4.4 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.
6.4.5 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!
To ensure that the frost protection function on 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.
452170.66.02-EN · FD 0305
connection
English
EN-11
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