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4
4 Electrical installation of the heat pump
1)
The three-core or four-core supply cable for the output
section of the heat pump is fed from the heat pump meter via
the utility blocking contactor (if required) into the heat pump
(1L/N/PE~230 V, 50 Hz or 3L/PE~400 V, 50 Hz).
The system must be protected according to the power
consumption data on the type plate using an all-pole circuit
breaker of the phases with C characteristic and common
tripping for all paths. Cable cross-section according to
DIN VDE 0100.
2)
The three-core supply cable for the heat pump manager
(N1 heating controller) is fed into the heat pump (device with
integrated controller) or to the future mounting location of the
heat pump manager (HPM).
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,
because otherwise important protection functions could be
lost during a utility block.
3)
The utility blocking contactor(K22) with 3 main contacts
(1/3/5 // 2/4/6) and an auxiliary contact (NO contact 13/14)
should be dimensioned according to the heat pump output
and must be supplied by the customer.
The NO contact of the utility blocking contactor (13/14) is
looped from terminal strip X3/G to connector terminal N1-J5/
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 (230V AC) by the heat pump
manager via terminals X1/N and N1-J13/NO 4.
5)
The contactor (K21) for the flange heater (E9) in the hot
water cylinder should be dimensioned according to the
radiator output and must be supplied by the customer. It
is controlled (230V AC) by the heat pump manager via
terminals X2/N and N1-X2/K21.
6)
The contactors mentioned in points 3, 4 and 5 are installed
in the electrical distribution system. The mains cables for the
heating elements should be dimensioned and protected
according to DIN VDE 0100.
7)
The heat circulating pump (M13) is connected to terminals
X2/N and N1-X2/M13.
8)
The hot water circulating pump (M18) is connected to
terminals X2/N and N1-X2/M18.
9)
The return flow sensor is integrated into air-to-water heat
pumps for outdoor installation, and is connected to the heat
pump manager via the control line. The return flow 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 X3/ R2.1. Bridge A-R2 (situated between X3/B2
and X3/1 when delivered) must then be moved to terminals
X3/1 and X3/2.
10) The external sensor (R1) is connected to terminals X3/
GND (ground) and N1-X3/R1.
11) The hot water sensor (R3) is installed in the hot water
cylinder and is connected to terminals X3/GND (ground) and
N1-X3/R3.
EN-6
NOTE
If three-phase pumps are implemented, a power contactor can be
controlled via the 230 V output signal of the heat pump manager.
Sensor lines can be extended up to 40 m using 2 x 0.75 mm cables.
Fig. 4.1:
Wall-mounted heat pump manager (heating)
F2
Load fuse for plug-in terminals J12, J13
and J21 5x20 / 4.0AT
F3
Load fuse for plug-in terminals J15 to J18
and J22 5x20 / 4.0AT
N1
Control unit
T1
Safety transformer 230/24V AC
X1
Terminal strip - infeed
X2
Terminal strip, voltage = 230V AC
X3
Terminal strip, extra-low voltage < 25V AC
X11 Module connection plug
X12 Connecting cable plug
Heat pump controller - 230V AC
X13.1Connecting cable plug
Heat pump controller - < 25V AC
X13.2Connecting cable plug
Heat pump controller - < 25V AC
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