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Dimplex LA 25TU Manual

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www.dimplex.de 452163.66.10 · FD 9506 EN-7
English
LA 17TU - LA 40TU
6.3 Electrical connection
A standard four-core cable is used for connecting the heat pump
to the power supply.
The cable must be provided by the customer. The conductor
cross section is selected in accordance with the power consump-
tion of the heat pump (see appendix Device information) and the
applicable VDE (EN) and VNB regulations.
An all-pole disconnecting device with a contact gap of at least
3 mm (e.g. utility blocking contactor or power contactor) as well
as a 3-pole circuit breaker with common tripping for all external
conductors must be installed in the power supply (tripping current
in compliance with the device information).
The relevant components in the heat pump contain an internal
overload protection.
When connecting, ensure that the incoming supply has a clock-
wise rotating field.
Phase sequence: L1, L2, L3.
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).
The control voltage is supplied via the heat pump manager.
The heat pump manager has a 230 V AC-50 Hz power supply
and is connected in compliance with its own operating instruc-
tions (16 A fuse).
ATTENTION!
The control line 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 line.
The control lines (not included in the scope of supply) have rec-
tangular plug connectors on 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 230 V control voltage level, the other for the si-
gnal 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, see circuit diagrams in the appendix.
7 Start-up
7.1 General
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).
7.2 Preparation
The following items need to be checked prior to start-up:
All of the heat pump connections must be installed 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 fan must turn in the direction indicated by the arrow.
The settings of the heat pump manager must be adapted to
the heating system in accordance with the manager’s oper-
ating instructions.
Ensure the condensate outflow functions properly.
7.3 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.
8 Cleaning / maintenance
8.1 Maintenance
To protect the paintwork, avoid leaning anything against the de-
vice or putting objects on the device. External heat pump parts
can be wiped with a damp cloth and domestic cleaner.
NOTE
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
cannot be contaminated. In the event that operating malfunctions
due to contamination still occur, the system should be cleaned as
described below.
… 21 …


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