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SI 5MER - SI 11MER
7.5 Electrical connection
7.5.1 General
During start-up, observe the respective national safety regula-
tions and the applicable VDE safety regulations, particularly
VDE 0100, as well as the technical connection requirements of
the utility companies (EVU) and network operators!
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
-J11, N17-J1 to -J4, -J9, J10 and terminal strip X3. If, due to a
wiring error, the line voltage is mistakenly connected to these ter-
minals, the heat pump manager will be destroyed.
7.5.2 Electrical installation
1)
The supply cable for the output section of the heat pump (up
to 3-core) are fed from the electricity meter of the heat pump
via the utility blocking contactor (if required) into the heat
pump (see heat pump operating instructions for supply volt-
age).
Connection of the mains cable to the control panel of the
heat pump via terminal X1: L/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).
2)
The three-core supply cable for the heat pump manager
(heating controller N1) is fed into the heat pump . Connec-
tion of the control line to the control panel 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 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 main contacts and
an auxiliary contact should be dimensioned according to the
heat pump output and must be supplied by the customer.
The NO contact of the utility blocking contactor is looped
from terminal strip X3/G (24 VAC) to connector terminal 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 (230 V AC) by the heat pump manager via ter-
minals X2/N and N1-J13/NO4.
5)
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 N1-J16/NO 10.
EN-8
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6)
The contactors mentioned above in points 3, 4 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.
7)
All cables must be installed as permanent wiring.
8)
The heat circulating pump (M13) is connected to terminals
X2/N and N1-J13/NO 5.
9)
The DHW loading pump (M18) is connected to terminals X2/
N and N1-J13/NO 6.
10) The brine or well pump (M11) is connected to terminals X2/
N and N1-J13/NO 3.
11) The return sensor (R2) is integrated into heat pumps for in-
door installation.
The heat pump manager is connected via the following ter-
minals: X3/GND and N1-J2/B2.
12) The external sensor (R1) is connected to terminals X3/GND
and N1-J2/B1.
13) The domestic hot water sensor (R3) is included with the do-
mestic hot water cylinder and is connected to terminals X3/
GND and N1-J2/B3.
8
Commissioning
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).Start-up should be carried out in heating op-
eration.
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.
The dirt trap 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.
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