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8
7.5.2 Electrical installation
1)
The supply cable for the output section of the heat pump (up
to 4-core) is fed from the electricity meter of the heat pump
via the utility blocking contactor (if required) into the heat
pump Connection of the mains cable to the control panel of
the heat pump via terminal X1: L1/L2/L3/N/PE.
An all-pole disconnecting device with a contact gap of at
least 3 mm (e.g. utility 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 com-
pliance with the device information).
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).
2)
The three-core supply cable for the heat pump manager
(heating controller N1) is fed into the heat pump .
Connection of the control line to the control panel of the heat
pump via terminal X2: L/N/PE.
Details on the power consumption of the heat pump are
listed on both the product information sheet and the type
plate.
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 contac-
tor or be connected to the household current, as important
protection functions could otherwise 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 X3/A1.
CAUTION! Extra-low voltage!
4)
The contactor (K21) for the flange heater (E9) in the hot
water cylinder should be dimensioned according to the radi-
ator output and must be supplied by the customer. It is con-
trolled (230 V AC) by the heat pump manager via terminals
X2/N and X2/K21.
5)
The contactors mentioned above in points 3 and 5 are in-
stalled in the electrical distribution system. The mains cables
for the heating elements should be dimensioned and pro-
tected according to DIN VDE 0100.
6)
All cables must be installed as permanent wiring.
7)
The return flow sensor is integrated into the heat pumps.
The return flow sensor must be installed in the immersion
sleeve in the manifold only when a dual differential pres-
sureless 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.
8)
The external sensor (R1) is connected to terminals X3/GND
and X3/R1.
9)
The domestic hot water sensor (R3) is installed in the do-
mestic hot water cylinder and is connected to terminals X3/
GND and X3/R3.
E-8
8
Start-up
8.1 General Information
To ensure that start-up is performed correctly, it should only be
carried out by an after-sales service technician authorised by the
manufacturer. This may be a condition for extending the guaran-
tee (see Warranty Service).
8.2 Preparation
The following items need to be checked prior to start-up:
The heat pump must be fully connected, as described in
Chapter 7.
The heat source system and the heating circuit must have
been filled and checked.
Dirt traps and breathers must be inserted in the brine inlet of
the heat pump.
All valves that could impair proper flow in the brine and heat-
ing circuits must be open.
The heat pump manager must be adapted to the heating
system in accordance with the controller's operating instruc-
tions.
Ensure the condensate outflow functions.
The outflows of the brine and heating water pressure relief
valves must not be impaired.
8.3 Start-up Procedure
The heat pump is started up via the heat pump manager.
ATTENTION!
The heat pump must be started up in accordance with the installation and
operating instructions of the heat pump manager.
The overflow valve must be adjusted to the requirements of the
respective heating system. Incorrect adjustment can lead to
faulty operation and increased energy consumption. We recom-
mend carrying out the following procedure to correctly adjust the
overflow valve:
Close all of the heating circuits that may also be closed during
operation so that the most unfavourable operating state - with re-
spect to the water flow rate - is achieved. This normally means
the heating circuits of the rooms on the south and west sides of
the building. At least one heating circuit must remain open (e.g.
bathroom).
The overflow valve should be opened far enough to produce the
maximum temperature spread between the heating flow and re-
turn flow listed in the table below for the current heat source tem-
perature. The temperature spread should be measured as close
as possible to the heat pump. The heating element of mono en-
ergy systems should be disconnected during start-up.
Heat source
temperature
between heating flow and return
From
To
-5° C
0° C
1° C
5° C
6° C
9° C
10° C
14° C
15° C
20° C
21° C
25° C
Max. temperature spread
flow
10 K
11 K
12 K
13 K
14 K
15 K
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