Bedienungsanleitung Dimplex SI 8TU (Seite 28 von 76) (Deutsch, Englisch, Französisch)

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English SI 6TU - SI 18TU

7.5.3 Connecting an electronically

regulated circulating pump

Electronically regulated circulating pumps have high starting

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

manager. For this reason, a coupling relay is installed or must be

installed between the output of the heat pump manager and

the electronically regulated circulating pump. This is not neces-

sary if the permissible operating current of 2 A and a maximum

starting current of 12 A are not exceeded in the electronically

regulated circulating pump or if express approval has been is-

sued by the pump manufacturer.

CAUTION!

It is not permitted to connect more than one electronically

regulated circulating pump via a relay output.

8 Commissioning

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:

The heat pump must be fully connected, as described in

Chapter 7.

The heat source system and the heating circuit must have

been filled and checked.

The dirt trap must be inserted in the brine inlet of the heat

pump.

All valves that could impair proper flow in the brine and

heating circuits must be open.

The heat pump manager must be adapted to the heating

system in accordance with the controller’s operating in-

structions.

8.3 Start-up Procedure

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

CAUTION!

The heat pump must be started up in accordance with the

installation and operating instructions of the heat pump

manager.

If an overflow valve is fitted to assure the minimum heating

water flow rate, the valve must be set in accordance with the re-

quirements of the respective heating system. Incorrect adjust-

ment can lead to faulty operation and increased energy con-

sumption. 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 unfavourable 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 table below 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.

Heat source

temperature Max. temperature spread

between heating flow and return

flow

From To

-5 °C 0 °C 10 K

1 °C 5 °C 11 K

6 °C 9 °C 12 K

10 °C 14 °C 13 K

15 °C 20 °C 14 K

21 °C 25 °C 15 K

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