Bedienungsanleitung Dimplex LA 40TU (Seite 21 von 60) (Deutsch, Englisch, Französisch)

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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.

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