Manual Dimplex LI 16TE (page 25 of 60) (English, German, French)

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8.3

3) The utility blocking contactor (K22) with 3 main contacts (1/

3/5 // 2/4/6) and an auxiliary contact (NO contact 13/14)

should be dimensioned according to the heat pump output

and must be supplied by the customer.

The NO contact of the utility blocking contactor (13/14) is

looped from terminal strip X3/G to connector terminal N1-J5/

ID3. CAUTION! Extra-low voltage!

4) The contactor (K21) for the flange heater (E9) in the hot

water cylinder should be dimensioned according to the

radiator output and must be supplied by the customer. It is

controlled (230 V AC) by the heat pump manager via

terminals X2/N and N1-J16/NO10.

5) The contactors mentioned above in points 3 and 4 are

installed in the electrical distribution system. The mains

cables for the heating elements should be dimensioned and

protected according to DIN VDE 0100.

6) All cables must be installed as permanent wiring.

7) The heat circulating pump (M13) is connected to terminals

X2/N and N1-J13/NO 5.

8) The DHW loading pump (M18) is connected to terminals X2/

N and N1-J13/NO 6.

9) The return sensor (R2) is integrated into air-to-water heat

pumps for indoor installation.

The connection to the HPM is made at terminals X3/GND

and N1-J2/B2.

10) The external sensor (R1) is connected to terminals X3/GND

and N1-J2/B1.

11) The domestic hot water sensor (R3) is included with the

domestic hot water cylinder and is connected to terminals

X3/ GND and X3/R3.

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 settings of the haet pump manager must be adapted to

the heating system in accordance with the controller’s oper-

ating instructions.

Ensure the condensate outflow functions.

8.3 Procedure

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

ments should be made in compliance with the instructions.

If an overflow valve is fitted to maintain the minimum heat-

ing water flow rate, the valve must be adapted to the require-

ments of the 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.

ATTENTION!

Operating the heat pump at low system temperatures may cause the heat

pump to break down completely. After a prolonged power failure, the

commissioning procedure detailed above must be followed.

Heat source

temperature

max. difference between

heating water supply and

return temperature

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 16TE Manual

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