Dimplex SI 24TE SI 37TE manual Preparatory Steps, Commissioning Procedure

8.3

For more detailed instructions concerning the connection and functioning of the heat pump controller (e.g. the supplied external wall sensor) please refer to the enclosed operating manual of the controller.

An automatic circuit-breaker with simultaneous tripping of all ex- ternal conductors is to be provided in the load power supply. The circuit-breaker must be an all-pole disconnect device with a con- tact gap of at least 3 mm. The same applies to any additional dis- able contactors that may be required, e.g. during shut-off periods imposed by the utility company. The required cross-sectional area of the conductors is to be selected according to the power consumption of the heat pump, the technical connection require- ments of the relevant utility company and all applicable regula- tions. Power consumption data of the heat pump is provided in the product literature and on the nameplate. The terminals are designed for a max. conductor cross-section of 35 mm².

ATTENTION!

The clockwise phase sequence must be observed when connecting the load lines (the heat pump will deliver no output and will be very noisy when the phase sequence is incorrect).

The power cable must be run through the guide tubes, inserted into the side of the control box and secured by means of the strain relief.

8 Commissioning

8.1General Information

To ensure proper commissioning it should be carried out by a customer service authorised by the manufacturer. This will lead, under certain circumstances, to an extension of the warranty pe- riod (cf. Warranty).

8.2Preparatory 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 7.

„The heat source system and the heating circuit must have been filled and checked.

„The strainer must have been fitted in the sole inlet of the heat pump.

„In the brine and heating circuits all valves that might impair the proper flow must be open.

„The settings of the heat pump controller must be adapted to the heating installation in accordance with the instructions contained in the controller's operating manual.

8.3Commissioning Procedure

The start-up of the heat pump is effected via the heat pump con- troller.

ATTENTION!

Commissioning is to be effected in accordance with the installation and operating manual of the heat pump controller.

Where 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 heating installation. An incorrect setting may result in various error symptoms and an increased elec-tric power consumption. To correctly set the overflow valve, the fol- lowing procedure is recommended:

Close all of the heating circuits which may also be closed during operation (depending on the type of heat pump usage) so that the least favourable operating state - with respect to the water flow rate - is achieved. Normally, these heating circuits are those of the rooms located on the south and west sides of buildings. At least one heating circuit must remain open (e.g. bathroom).

The overflow valve is to be opened to such an extent that based on the current heat source temperature the maximum tempera- ture difference between heating supply and return flow tempera- ture is obtained, as indicated in the table below. The tempera- ture difference should be measured as closely to the heat pump as possible. In mono-energetic systems, the electric heating ele- ment is to be deactivated.

Heat source		max. difference between heating
temperature
		supply and return temperature
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

English

Any malfunctions occurring during operation are displayed on the heat pump controller and can be corrected as described in the operating manual of the heat pump controller.

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