Bedienungsanleitung Dimplex LI 16I-TUR (Seite 25 von 72) (Deutsch, Englisch, Französisch)

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www.glendimplex.de 452169.66.06 · FD 0009 EN-3

LI 16I-TUR English

2 Purpose of the heat pump

2.1 Application

The air-to-water heat pump is to be used exclusively for the

heating and cooling of heating water. It can be used in new or

existing heating systems.

The heat pump is suitable for mono-energy and bivalent opera-

tion down to an external temperature of -22 °C.

Proper defrosting of the evaporator is guaranteed by maintain-

ing a heating water return temperature of more than 22 °C

(+2 °C/-0 °C) during continuous operation.

The heat pump is not designed for the increased heat con-

sumption required when a building is being dried out. For this

reason, the additional heat consumption should be met using

special devices provided by the customer. For drying out build-

ings in autumn or winter, we recommend installing a suitable

2nd heat generator (e.g. electric heating element available as an

accessory).

In cooling operation, the heat pump is suitable for air tempera-

tures ranging from +15 °C to + 40 °C. It can be used for silent

and dynamic cooling. The minimum cooling water inlet temper-

ature is +7 °C.

NOTE

ººººº

The device is not suitable for operation with a frequency

converter.

2.2 Operating principle

Heating

Surrounding air is drawn in by the fan and fed through the evap-

orator (heat exchanger). The evaporator cools the air, i.e. it ex-

tracts heat from it. This extracted heat is then transferred to the

working medium (refrigerant) in the evaporator.

The heat is brought to a higher temperature level by increasing

its pressure with the aid of the electrically driven compressor. It

is then transferred to the heating water via the liquefier (heat

exchanger).

Electrical energy is used to raise the temperature of the heat in

the environment to a higher level. As the energy extracted from

the air is transferred to the heating water, this type of device is

called an air-to-water heat pump.

The air-to-water heat pump consists of the main components:

evaporator, ventilator and expansion valve, as well as the low-

noise compressors, the liquefier and the electrical control sys-

tem.

At low ambient temperatures, humidity accumulates on the

evaporator in the form of frost, reducing the transfer of heat.

Uneven accumulation during this process does not indicate a

fault. The evaporator is defrosted automatically by the heat

pump as required. Steam may be emitted from the air outlet de-

pending on the atmospheric conditions.

Cooling

The functions of the evaporator and the liquefier are reversed in

the "Cooling" operating mode.

The heating water transfers its heat to the refrigerant via the liq-

uefier, which is now functioning as an evaporator. The refriger-

ant is brought to a higher temperature level using the compres-

sor. Heat is transferred to the surrounding air via the liquefier

(which, in heating operation, functions as an evaporator).

2.3 Functional description for

integrated thermal energy

metering

The compressor manufacturer's performance specifications for

different pressure levels are stored in the heat pump software.

Two additional pressure sensors for determining the current

pressure level are installed in the refrigerating circuit, one be-

fore and one after the compressor. The current heat output can

be calculated from the compressor data stored in the software

and the current pressure level. The integral for the heat output

over the runtime gives the quantity of thermal energy supplied

by the heat pump, which is displayed separately for heating,

domestic hot water preparation and swimming pool water

preparation on the heat pump manager´s display.

The integrated thermal energy metering must not be used for

heating cost billing purposes. EN 1434 is not applicable.

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