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4
4 Electrical Installations for the Heat Pump
1)
The four-core or three-core supply cable for the output
section of the heat pump is routed from the heat pump
meter via the utility company's blocking contactor (if
required) into the heat pump (3L/PE~400 V, 50 Hz) or 1L/N/
PE~230 V, 50 Hz).
The system must be protected according to the power
consumption data on the type plate using a 3-pole or 1-pole
miniature circuit breaker with C characteristic and common
tripping for all paths. Cable cross section in compliance with
DIN VDE 0100.
2)
The three-core supply cable for the heat pump controller
(N1 heating controller) is routed into the future mounting
location of the heat pump controller (HPC).
The (L/N/PE~230 V, 50 Hz) supply cable for the heat pump
controller 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 with main contacts 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 X2/0 V to the connector terminal
J4/ID3. CAUTION! Extra-low voltage!
4)
The contactor (K8) 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 (230 V AC) by the heat pump controller via the
terminals X1/N and J16/NO 10.
5)
The contactors mentioned above in points 3 and 4 are
installed in the distribution cabinet. The mains cables for the
radiators should dimensioned and protected according to
DIN VDE 0100.
6)
The control sensor (R2) must be installed in systems with
cooling functionality in the flow, and in systems with bivalent
heat generator in the return flow. Both single-core wires are
connected to the terminals X2 (GND) and J2/B4.
7)
The external sensor (R1) is connected to the terminals X2
(GND) and J2/B1.
8)
The hot water sensor (R3) is installed in the hot water
cylinder and is connected to the terminals X2 (GND) and J2/
B2.
9)
The heat pump and the heat pump controller are connected
to each other via control lines which must be ordered
separately in the case of heat pumps installed outdoors.
NOTE
If three-phase pumps are implemented, a power contactor can be
controlled via the 230 V output signal of the heat pump controller.
Sensor cables can be extended to up to 30 m with 2 x 0.75 mm cables.
E-4
All manuals and user guides at all-guides.com
Fig. 4.1:
K24 Relay, request for hot water
N1
T1
X1
X2
Wall-mounted heat pump controller
Heating controller
Transformer
230 V AC terminal strip
24 V AC terminal strip
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