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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:
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 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 outflow from the heating water pressure relief valve
must also function correctly.
De-aeration of the heating system:
Ensure that all heating circuits are open and the heat circu-
lating pump is operating (level III).
Connect the voltage to the heat pump manager. Select the
heat generator 2 operating mode and de-aerate the system
at its highest point. Top up with water if required (maintain
static minimum pressure).
8.3 Start-Up Procedure
The heat pump is started up via the heat pump manager. Adjust-
ments should be made in compliance with the instructions.
The performance level of the circulating pump must be adapted
to the respective heating system.
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 (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) 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.
9 Maintenance / Cleaning
9.1 Maintenance
To protect the paintwork, avoid leaning or putting objects on the
device. External heat pump parts can be wiped with a damp cloth
and domestic cleaner.
ATTENTION!
Never use cleaning agents containing sand, soda, acid or chloride as
these can damage the surfaces.
To prevent faults due to sediment in the heat exchanger of the
heat pump, ensure that the heat exchanger in the heating system
can not be contaminated. We recommend protecting the evapo-
rator by installing a bird guard in the inlet duct. At least 80 % of
the cross section of the grating should be open. In the event that
operating malfunctions due to contamination still occur, the sys-
tem should be cleaned as described below.
Heat source
temperature Max. temperature spread
between heating flow and return
flow
From To
-20 °C -15 °C 4 K
-14 °C -10 °C 5 K
-9 °C -5 °C 6 K
-4 °C 0 °C 7 K
1 °C 5 °C 8 K
6 °C 10 °C 9 K
11 °C 15 °C 10 K
16 °C 20 °C 11 K
21 °C 25 °C 12 K
26 °C 30 °C 13 K
31 °C 35 °C 14 K
26


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