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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 (ap-
ply 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 domestic hot water cylinder. A compact system is used
to simplify the installation process, so that a lot of different com-
ponents do not have to be installed individually. Further informa-
tion 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 con-
sumer circuits to supply the flow to the return sensor, this must
be installed in the immersion sleeve of the dual differential pres-
sureless manifold.
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7.5 Electrical connection
7.5.1 General
All electrical connection 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 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-J23 to N1-J26 and terminal strip X3. If, due to a wir-
ing error, the line voltage is mistakenly connected to these termi-
nals, the heat pump manager will be destroyed.
7.5.2 Electrical Installation
1)
The 4-core electric supply cable for the output section of the
heat pump is fed from the electricity meter of the heat pump
via the utility company blocking contactor (if required) into
the heat pump (see the device information for supply volt-
age).
The mains cable is connected at the heat pump switch box
using terminals X1: L1/L2/L3/PE.
ATTENTION!
Ensure that there is a clockwise rotating field: With incorrect wiring the
starting of the heat pump is prevented. A corresponding warning is
indicated on the display of the heat pump manager (adjust wiring).
An all-pole disconnecting device with a contact gap of at
least 3 mm (e.g. utility company blocking contactor or power
contactor) and an all-pole circuit breaker with common trip-
ping for all external conductors must be installed in the
power supply for the heat pump (tripping current and charac-
teristic in compliance with the device information).
2)
The three-core electric supply cable for the heat pump man-
ager (heating controller N1) is fed into the heat pump. Con-
nection of the control cable to the contact plate of the heat
pump via terminal X2: L/N/PE.
The (L/N/PE~230 V, 50 Hz) supply cable for the heat pump
manager must have a continuous voltage. For this reason, it
should be tapped upstream from the utility company block-
ing contactor or be connected to the household current, as
important protection functions could otherwise be lost during
a utility block.
3)
The utility company blocking contactor (K22) with main con-
tacts and an auxiliary contact should be dimensioned ac-
cording to the heat pump output and must be supplied on
site.
The NO contact of the utility company blocking contactor is
looped from terminal strip X3/G to connector terminal X3/A1.
CAUTION! Extra-low voltage!
452234.66.54 · FD 9401
SIH 90TU
EN7
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