Manual Dimplex LI 16I-TUR (page 36 of 72) (English, German, French)

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EN-14 452169.66.06 · FD 0009 www.glendimplex.de

English LI 16I-TUR

7.5.3 Connecting an electronically

regulated circulating pump

Electronically regulated circulating pumps may have high start-

ing currents, which may shorten the service life of the heat

pump manager. A coupling relay must therefore be installed

between the output of the heat pump manager and the elec-

tronically regulated circulating pump. This is not necessary if

the permissible operating current of 2 A and a maximum start-

ing current of 12 A of the electronically controlled circulating

pump is not exceeded or an explicit release is in place from the

pump manufacturer. Further details can be taken from the elec-

trical documentation.

CAUTION!

It is not permitted to connect more than one electronically

regulated circulating pump via a relay output.

8Start-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 addi-

tional 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

described 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

arrow.

The settings of the Heat pump manager must be adapted

to the heating system in accordance with the controller’s

operating instructions.

Ensure the condensate outflow functions.

Both the accessories pack in the switch box and that which

is located under the ventilator must be removed.

8.3 Procedure

The heat pump is started up via the heat pump manager. Ad-

justments should be made in compliance with the instructions.

If an overflow valve is fitted to maintain the minimum heating

water flow rate, the valve must be adapted to the requirements

of the heating system. Incorrect adjustment can lead to faulty

operation and increased energy consumption. We recommend

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 build-

ing. At least one heating circuit must remain open (e.g. bath-

room).

The overflow valve should be opened far enough to produce

the maximum temperature spread between the heating flow

and return flow listed in the following table for the current heat

source temperature. The temperature spread should be meas-

ured as close as possible to the heat pump. The heating ele-

ment 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.

CAUTION!

Operating the heat pump at low system temperatures may

cause the heat pump to break down completely.

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

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Dimplex LI 16I-TUR Manual

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