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7.5.2 Electrical installation work
1)
The four-core electrical supply cable for the heat pump
power part is fed from the heat pump electricity meter into
the heat pump via the utility company blocking contactor (if
required) (for supply voltage, see heat pump manual).
The mains cable is connected to the heat pump contact
plate via 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 contac-
tor) 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).
2)
The three-core supply cable for the heat pump manager
(heating controller N1) is fed into the heat pump. Connection
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 must be designed and pro-
vided by the customer in accordance with the heat pump
output.
The NO contact of the utility company blocking contactor is
looped from the terminal strip X3/G to the plug-in terminal
X3/ID3. CAUTION! Extra-low voltage!
4)
The contactor (K20) for the immersion heater (E10) of mono
energy systems (HG2) should be dimensioned according to
the radiator output and must be supplied by the customer. It
is controlled (230 V AC) by the heat pump manager via ter-
minals X2/N and X2/K20.
5)
The contactor (K21) for the flange heater (E9) in the domes-
tic hot water cylinder should be dimensioned according to
the radiator output and must be supplied by the customer. It
is controlled (230 V AC) by the heat pump manager via ter-
minals X2/N and X2/K21.
6)
The contactors mentioned above in points 3, 4 and 5 are in-
stalled in the electrical distribution system.
7)
All installed electric cables must have permanent wiring.
8)
The heat circulating pump (M13) is activated via the contact
N1-J13/NO5. The connection points for the pump are X2/
M13 and X2/N. When using pumps where the switching ca-
pacity exceeds the output, a coupling relay must be inter-
posed.
9)
The auxiliary circulating pump (M16) is activated via the con-
tact N1-J16/NO9. The connection points for the pump are
X2/M16 and X2/N. A coupling relay is already integrated in
this output.
10) The domestic hot water circulating pump (M18) is activated
via the contact N1-J13/NO6. The connection points for the
pump are X2/M18 and X2/N. When using pumps where the
switching capacity exceeds the output, a coupling relay must
be interposed.
EN-8
11) The brine or well pump (M11) is activated via the contact N1-
J12/NO3. The connection points for the pump are X2/M11
and X2/N. A coupling relay is already integrated in this out-
put.
12) The return sensor (R2) is integrated in the heat pumps for in-
door installation.
The heat pump manager is connected via the following ter-
minals: X3/GND and X3/R2.
13) The external sensor (R1) is connected to terminals X3/GND
and X3/R1.
14) The domestic hot water sensor (R3) is included with the do-
mestic hot water cylinder and is connected to terminals GND
and X3/R3.
7.5.3 Connection of electronically
regulated circulating pumps
Electronically regulated circulating pumps have high starting cur-
rents, which may shorten the service life of the heat pump man-
ager. For this reason, a coupling relay is installed or must be in-
stalled between the output of the heat pump manager and the
electronically regulated circulating pump. This is not necessary 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 issued by the
pump manufacturer.
ATTENTION!
It is not permitted to connect more than one electronically regulated
circulating pump via a relay output.
452237.66.01 · FD 9908
SI 26TU - SI 35TU
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