Dimplex I 22TU, Installation And Operating Instructions Manual

Page: 20 / 60

EN-6 452235.66.09 · FD 9209 www.dimplex.de
English
WI 10TU - WI 22TU
Fig. 7.2: Sensor characteristic curve, NTC-2 according to
DIN 44574 External temperature sensor
7.4.2 Mounting the external
temperature sensor
The temperature sensor must be mounted in such a way that all
weather conditions are taken into consideration and the meas-
ured value is not falsified.
 On the external wall of a heated room used as living space,
if possible on the north or north-west side of the building
 Do not install in a “sheltered position” (e.g. in a wall niche or
under a balcony)
 Not in the vicinity of windows, doors, exhaust air vents, ex-
ternal lighting or heat pumps

Not to be exposed to direct sunlight at any time of year
Sensor lead: Max. length 40 m; min. core cross-section
0.75 mm²; external diameter of the cable 4-8 mm.
7.4.3 Installing the strap-on sensor
It is only necessary to mount the strap-on sensors if they are in-
cluded in the scope of supply of the heat pump but have not yet
been installed.
The strap-on sensors can be fitted as pipe-mounted sensors or
installed in the immersion sleeve of the compact manifold.
Mounting as a pipe-mounted sensor
 Remove paint, rust and scale from heating pipe.
 Coat the cleaned surface with heat transfer compound
(apply sparingly).
 Attach the sensor with a hose clip (tighten firmly, as loose
sensors can cause malfunctions) and thermally insulate.
7.4.4 Hydraulic distribution system
The compact manifold and the dual differential pressureless
manifold function as an interface between the heat pump, the
heating distribution system, the buffer tank and, in some cases,
even the hot water cylinder. A compact system is used to simplify
the installation process, so that a lot of different components do
not have to be installed individually. Further information can be
found in the relevant installation instructions.
Compact manifold
The return sensor can remain in the heat pump, or should be in-
stalled in the immersion sleeve. The remaining empty space be-
tween the sensor and the immersion sleeve must be filled com-
pletely with heat transfer compound.
Dual differential pressureless manifold
In order for the heating circuit pumps of the generator and
consumer circuits to supply the flow to the return sensor, this
must be installed in the immersion sleeve of the dual differential
pressureless manifold.
7.5 Electrical connection
7.5.1 General
All electrical connection work may only be carried out by a trai-
ned electrician or a person qualified for the tasks in hand in ac-
cordance with the
 installation and operating instructions,
 country-specific installation requirements (e.g. VDE 0100)

technical connection requirements of the energy suppliers
and supply grid operators (e.g. TAB) and
 the 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; N1-J20; N1-J23; N1-J24 and the terminal strips
X3; X5.1. If, due to a wiring error, the line voltage is mistakenly
connected to these terminals, the heat pump manager will be de-
stroyed
7.5.2 Electrical installation
1) The supply cable (with up to 5 cores) for the power element
of the heat pump or the primary pump is routed from the heat
pump's electricity meter to the heat pump.
The cable for the heat pump is routed via the utility contactor
(if required). Connection of the mains cable is at the control
panel of the heat pump via the terminals: X1: L1/L2/L3/N/PE
or X1: L10/L20/L30/N0/PE. If no utility contactor is used, the
electrical loads are supplied via a shared feed cable (bridge
feeds using bridges supplied). The power supplies are fitted
with an all-phase disconnection with at least 3 mm contact
([WHUQDOWHPSHUDWXUHLQ>ƒ&@
5HVLVWDQFHYDOXHLQ
>N2KP@
+RVHFOLS
6WUDSRQVHQVRU
7KHUPDOLQVXODWLRQ