Bedienungsanleitung Dimplex LA 1118BWC (Seite 28 von 68) (Deutsch, Englisch, Französisch)

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English LA 1118BW(C)

7.3 Electrical connection

3 lines/cables must be routed to the heat pump in total:

A standard 5-core cable is used to connect the heat pump

to the power supply.

The cable must be provided on-site. The conductor cross

section is selected in accordance with the power con-

sumption of the heat pump (see attachment Device Infor-

mation) 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 contac-

tor) must be installed in the heat pump power supply.

A 3-pole circuit breaker with joint tripping of all outer con-

ductors (trip current in accordance with device informa-

tion) provides the short circuit protection taking into ac-

count the layout of the internal wiring.

The relevant components in the heat pump contain an in-

ternal overload protection.

When connecting, ensure that the incoming supply has a

clockwise rotating field.

Phase sequence: L1, L2, L3.

CAUTION!

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.

A 3-pole line must be laid for this in accordance with the

electrical documentation. Further information on the wir-

ing of the heat pump manager is available in the heat pump

manager operating instructions.

A shielded communication line(J-Y(ST)Y ..LG) (not included

in the scope of supply) connects the heat pump manager

with the µPC2 installed in the heat pump. More detailed in-

structions can be found in the heat pump manager operat-

ing instructions and in the electrical documentation.

NOTE

ºººº

The communication cable is necessary for the function of air-

to-water heat pumps in outdoor installation. It must be

shielded and laid separately from the mains cable.

7.3.1 Demand sensor connection

The demand sensor R2.2 (NTC 10) is included with the heat

pump manager. It must be installed depending on the hydrau-

lics used (see Appendix Chapter 3 on p. VII).

If a demand sensor is not connected, the second heat genera-

tor can not be controlled with the heat pump manager in the

event of an interruption in communication either.

NOTE

ºººº

The return sensor R2 installed in the heat pump is active when

the compressor is running and must not be disconnected.

8 Commissioning

8.1 General

To ensure that commissioning is performed correctly, it should

only be carried out by an after-sales service technician author-

ised by the manufacturer. This may be a condition for an addi-

tional warranty (see "Warranty service").

8.2 Preparation

The following items must be checked prior to commissioning:

All of the heat pump connections must be installed as de-

scribed in Chapter 7.

All valves which 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 latter's op-

erating instructions.

Ensure that the condensate drain functions properly.

8.3 Procedure

The heat pump is commissioned via the heat pump manager.

Settings should be made in compliance with the HPM's instruc-

tions.

At heating water temperatures below 7 °C, commissioning is

not possible. The water in the buffer tank must be heated with

the second heat generator to at least 18 °C.

To ensure problem-free commissioning, the following proce-

dure 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 "Commissioning"

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 rate is constantly raised by

slightly opening the respective heating circuit. The heat-

ing water temperature in the buffer tank must not be al-

lowed to drop below 20 °C during this process. This en-

sures that the heat pump can be defrosted at any time.

7) When all heating circuits are fully open and a return tem-

perature of at least 18 °C is maintained, the commissioning

is complete.

CAUTION!

Operating the heat pump at low system temperatures may

cause the heat pump to break down completely.

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