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7.5
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
measured 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,
external 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
included 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 Hot water 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
installed in the immersion sleeve. The remaining empty space
between the sensor and the immersion sleeve must be filled
completely 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.
EN-8
7.5 Electrical connection
7.5.1 General
During start-up, observe the respective national safety
regulations and the applicable VDE safety regulations,
particularly VDE 0100, as well as the technical connection
requirements of the utility companies (EVU) and network
operators!
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-
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.
Extra-low voltage is connected to controller terminals N1-J1 to
N1-J11; N1-J19; N1-J20; N1-J24 and terminal strip X3. If, due to
a wiring error, the line voltage is mistakenly connected to these
terminals, the heat pump manager will be destroyed.
7.5.2 Electrical installation
1)
The supply cable for the output section of the heat pump (up
to 5-core) is fed from the electricity meter of the heat pump
via the utility blocking contactor (if required) into the heat
pump (see heat pump operating instructions for supply
voltage). As delivered, the power supply can be taken from
a common mains circuit. As an option, the heat pump and
the second heat generator can be powered by separate
cables, provided that the bridges are removed from the
supply terminals (see circuit diagram in the appendix).
An all-pole disconnecting device with a contact gap of at
least 3 mm (e.g. utility blocking contactor or power
contactor) 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).
When connecting the device, ensure that the incoming
supply has a clockwise rotating field L1; L2; L3; L10; L20;
L30.
ATTENTION!
Ensure the rotary field is clockwise when connecting the mains cables (if
the rotary field is not clockwise, the heat pump will not work properly, is
very loud and may cause damage to the compressor).
On delivery, the 2nd heat generator is connected with a
2 kW heat output. To increase the output to 4 kW or 6 kW,
the copper bridges included in the scope of supply must be
connected as shown in the circuit diagram.
For detailed information, refer to the circuit diagrams in the
appendix.
2)
The three-core supply cable for the heat pump manager
(heating controller N1) is fed into the heat pump.
The control voltage must be protected by a 10 A fuse. The
(L/N/PE~230 V, 50 Hz) supply cable for the heat pump
manager must have a constant voltage. For this reason, it
should be tapped upstream from the utility blocking
contactor or be connected to the household current, as
important protection functions may otherwise be lost during
a utility block.
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