Dimplex LA16ASR manual 7COMMISSIONING, Electrical Connection, General, Preparatory Steps

6.3 Electrical Connection

The power connection of the heat pump is effected via a commercially available 4-core cable.

The cable has to be supplied by the client and the wire cross-section to be selected according to the power consumption of the heat pump (see Equip- ment Data in the appendix) as well as the relevant VDE (EN) and VNB regulations.

The power supply of the heat pump must be equipped with an all-pole disconnecting device with a contact gap of at least 3 mm (e.g. utility company shut-off contactor, power contactor) as well as a 3- pole circuit breaker with simultaneous tripping of all external conductors (tripping current as stated on the device data plate).

When making the electrical connection, the clockwise phase sequence of the power supply must be ensured.

Phase sequence: L1, L2, L3.

CAUTION! Clockwise phase sequence to be observed: Damage to the compressor may be incurred if it is operated in the wrong sense of rotation.

The control voltage is supplied via the heat pump controller.

The 230V AC-50 Hz power supply of the heat pump controller is effected as described in its instruction manual (fusing 16 A).

The control lead (not included in the scope of delivery) is connected to the heat pump controller via a multi-pole plug connector. In the heat pump, the plug connector located at the bottom of the unit in the immediate vicinity of the line feed-through through the base of the unit. More detailed instructions are contained in the instruction manual of the heat pump controller.

For more detailed information refer to the wiring diagrams in the appendix.

MOUNTING

COMMISSIONING

7COMMISSIONING

7.1 General

To ensure proper commissioning it should be carried out by an after-sales service authorized by the manufacturer. Only then can an extended warranty period of 3 years in total be granted (cf. Warranty service).

7.2 Preparatory Steps

Prior to commissioning, the following items need to be checked:

-All connections of the heat pump must have been made as described in Chapter 6.

-In the heating circuit all valves that could impair the proper heating water flow must be open.

-The air intake/discharge path must be unobstructed.

-The sense of rotation of the fan must correspond to the direction of the arrow.

-The settings of the heat pump controller must be adapted to the heating installation in accordance with the instructions contained in its instruction manual.

-Proper condensate drainage must be ensured.

7.3 Procedure During Heating Season

The start-up of the heat pump is effected via the heat pump controller. The settings must be made in accordance with its instruction manual.

Malfunctions during operation are displayed on the heat pump controller and may be corrected as described in the heat pump controller's instruction manual.

n the case of outdoor temperatures below 10 °C and heating water temperatures below 16 °C, the buffer tank has to be heated to at least 30 °C using the second heat generator.

The following procedure has to be observed so that the commissioning activities can be carried out without any problems:

a)Close all heating circuits.

b)Open the overflow valve all the way.

c)Select the automatic mode on the controller.

d)Wait until the buffer tank has reached a temperature of 25-30 °C.

e)Subsequently, slowly reopen the valves of the heating circuits, one after the other, in such a way that the heating water flow rate is continually increased by slightly opening the related heating circuit valve. When so doing, the heating water temperature in the buffer tank must not fall below 25 °C so that the heat pump can be defrosted at any time.

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