Connecting An Electronically Regulated Circulating Pump; Frost Protection - Dimplex Si 50Tur Montage- Und Gebrauchsanweisungen

SI 50 TUR
10) The domestic hot water circulating pump (M18) is acti-
vated via the contact N1-J13/NO6. Connection points for
the pump are coupling relays KM18/14 and X2/N.
11) The brine or well pump (M11) is activated via the contact
refrigeration circuit controller N0/J18-Out3. A coupling
relay is already integrated in this output. If an additional
well pump is used, the protective motor switch at the site
must be checked and replaced if necessary.
Ensure that the power supply for these terminals cannot be
switched off by the tariff contactor when connecting the
mains cable for the well pump, in order to safeguard the
switch-off delay of the well pump.
12) A return sensor is integrated into the heat pumps. The de-
mand sensor must be installed in the immersion 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 controller N1/J2-U2.
13) The external sensor (R1) is connected to terminals X3/GND
and controller N1/J2-U1.
14) The domestic hot water sensor (R3) is included with the
domestic hot water cylinder and is connected to terminals
X3/GND and controller N1/J2-U3.
15) The connector cable (or the connector) of the hydraulic 4-
way reversing valve must be connected to the receptacle
of the device mounted at the "top" in the rear wall.
All lines must be fed into the device from the back and secured
at the switch box using cable connectors. They must addition-
ally be secured with a strain relief.
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7.7.3 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.
CAUTION!
It is not permitted to connect more than one electronically
regulated circulating pump via a relay output.
7.7.4 Circulating pump connection with
high performance
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.

7.7.5 Frost protection

Regardless of the settings for the heat circulating pumps, they
always run in heating and frost protection mode. In systems
with multiple heating circuits, the 2nd and 3rd heat circulating
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 flow must be maintained
through the heat pump at all times.
CAUTION!
The primary pump (M11 – responsible for the heat source flow
rate) and the secondary pump (M16 – responsible for the
warm/cold water flow rate) must always be clamped to the
heat pump manager in all cases. This is the only way to ensure
the pump flows and returns necessary for operation and to
ensure that the necessary safety measures are in place.
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