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6.3 Electrical connection
A standard 3-core cable is used to connect the heat pump to the
power supply.
The cable must be provided by the customer and the conductor
cross-section selected according to with the power consumption
of the heat pump (see appendix "Device information") and the
applicable VDE (EN) and VNB regulations.
A disconnecting device with a contact gap of at least 3 mm (e.g.
utility blocking contactor or power contactor), as well as a 1-pole
circuit breaker, must be installed in the power supply of the heat
pump (tripping current in compliance with the device informa-
tion).
ATTENTION!
The control cable is essential for the operation of air-to-water heat pumps
for outdoor installation. The control cable and mains cable are to be
routed separately. It is not permissible for the customer to extend the
control cable..
The control voltage is supplied via the heat pump manager.
The heat pump manager has a 100 V AC-50 Hz power supply
and is connected in compliance with its own operating instruc-
tions (see device information / type plate for fuse type).
The control lines (not included in the scope of supply) have rec-
tangular plug connectors at both ends. One end is connected to
the heat pump manager, and the other end is connected to the
switch box in the heat pump. The plug connections to the heat
pump are located on the bottom of the switch box.
Two separate lines are used as control lines. One of the lines is
designed for the 100 V control voltage level, the other for the sig-
nal and/or extra-low voltage level.
More detailed information can be found in the operating instruc-
tions of the heat pump manager.
For detailed information, refer to the circuit diagrams in the ap-
pendix.
7
Start-up
7.1 Preparation
Start-up should be carried out in heating operation.
The following items must be checked prior to start-up:
All of the heat pump connections must be installed as de-
scribed in chapter 6.
All valves which 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 latter's operating
instructions.
Ensure that the condensate outflow functions properly.
EN-6
All manuals and user guides at all-guides.com
7.2 Procedure
The heat pump is started up via the heat pump manager. Adjust-
ments should be made in compliance with the instructions.
If an overflow valve is fitted to maintain the minimum heat-
ing water flow rate, the valve must be adapted to the require-
ments of the 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 (depending on the type of heat pump usage) so that
the most unfavorable operating state - with respect 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 following table for the current heat source
temperature. The temperature spread should be measured as
close as possible to the heat pump. The heating element of mono
energy systems should be disconnected during start up.
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)
2)
3)
4)
5)
6)
7)
Operating the heat pump at low system temperatures may cause the heat
pump to break down completely.
452159.66.37 · FD 9311
Heat source
Max. temperature spread
temperature
between heating flow and return
from
to
-20 °C
-15 °C
-14 °C
-10 °C
-9 °C
-5 °C
-4 °C
0 °C
1 °C
5 °C
6 °C
10 °C
11 °C
15 °C
16 °C
20 °C
21 °C
25 °C
26 °C
30 °C
31 °C
35 °C
Close all consumer circuits.
Ensure that the heat pump has the correct water flow.
Use the manager to select the automatic operating mode.
In the special functions menu, start the "Start-up" program.
Wait until a return temperature of at least 25 °C has been
reached.
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.
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!
4 K
5 K
6 K
7 K
8 K
9 K
10 K
11 K
12 K
13 K
14 K
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