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LI 20TES - LI 28TES
4)
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 (230 V AC) by the heat pump manager via
terminals X2/N and N1-J16/NO10.
5)
The contactors mentioned above in points 3 and 4 are
installed in the electrical distribution system. The mains
cable for the installed pipe heater must be laid and
secured in accordance with the valid standards and
regulations.
6)
All installed electric cables must have permanent wiring.
7)
The heat circulating pump (M13) is connected to terminals
X2/N and N1-J13/NO 5.
8)
The DHW loading pump (M18) is connected to terminals X2/
N and N1-J13/NO 6.
9)
The return sensor (R2) is integrated into air-to-water heat
pumps for indoor installation.
The connection to the HPM is at terminals X3/GND and N1-
J2/B2.
10) The external sensor (R1) is connected to terminals X3/GND
and N1-J2/B1.
11) 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.
7.5.3 Connecting an electronically
regulated circulating pump
Electronically regulated circulating pumps have high starting cur-
rents, which may shorten the service life of the heat pump man-
ager. A coupling relay is therefore installed or must be installed
between the output of the heat pump manager and the electron-
ically regulated circulating pump. This is not necessary if the
maximum permissible operating current of the heat pump man-
ager of 2 A and the maximum permissible starting current of the
heat pump manager of 12 A are not exceeded by the electroni-
cally regulated circulating pump or a relevant 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.
EN-10
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. These measures can also include an additional
warranty under certain conditions (see Warranty).
8.2 Preparation
The following items need to be checked prior to start-up:
All of the heat pump connections must be established as de-
scribed in Chapter 6.
All valves that could impair the proper flow of the heating
water in the heating circuit must be open.
The air intake and air outlet paths must be clear.
The ventilator must turn in the direction indicated by the ar-
row.
The settings of the heat pump manager must be adapted to
the heating system in accordance with the controller's oper-
ating instructions.
Ensure the condensate outflow functions.
8.3 Procedure
The heat pump is started up via the heat pump manager. Adjust-
ments should be made in compliance with the instructions.
At hot water temperatures under 7° C, start-up is not possible.
The water in the buffer tank must be heated to a minimum
of 18 °C with the second heat generator.
To ensure a problem-free start-up, the following procedure is to
be implemented:
1)
Close all consumer circuits.
2)
Ensure that the heat pump has the correct water flow.
3)
Use the manager to select the automatic operating mode.
4)
In the special functions menu, start the "Start-up" program.
5)
Wait until a return temperature of at least 25 °C has been
reached.
6)
Now slowly reopen the heating circuit valves in succession
so that the heating water flow is constantly raised by slightly
opening the respective heating circuit. The heating water
temperature in the buffer tank must not be allowed to drop
below 20 °C during this process. This ensures that the heat
pump can be defrosted at any time.
7)
When all heat circuits are fully open and a return tempera-
ture of at least 18 °C is maintained, the heat pump start-up
is complete.
ATTENTION!
Operating the heat pump at low system temperatures may cause the heat
pump to break down completely. After a prolonged power failure, the
commissioning procedure detailed above must be followed.
452161.66.04 · FD 9303
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