Purpose Of The Heat Pump; Application; Operating Principle; Scope Of Supply - Dimplex LA 35TUR+ Installation And Operating Instructions Manual

2 Purpose of the Heat
Pump

2.1 Application

The brine-to-water heat pump is to be used exclusively for the
heating and cooling of heating water. It can be used in new or al-
ready-existing heating systems.
The heat pump is suitable for mono energy and bivalent opera-
tion down to an external temperature of -25 °C.
Proper defrosting of the evaporator is guaranteed by maintaining
a heating water return flow temperature of more than 18 °C dur-
ing continuous operation.
The heat pump is not designed for the increased heat consump-
tion required when a building is being dried out. For this reason,
the additional heat consumption should be met using special de-
vices provided by the customer. If a building is to be dried out in
autumn or winter, we recommend installing an additional electric
heating element (available as an accessory).
In cooling operation, the heat pump is suitable for air tempera-
tures ranging from +10°C to + 45°C.
It can be used for silent and dynamic cooling. The minimum
water temperature is +7°C.
ATTENTION!
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 compressors. It
is then transferred to the heating water via the liquefier (heat ex-
changer).
Water for domestic use and swimming pool water can be pre-
pared simultaneously or separately via the additional heat ex-
changer.
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, fan and expansion valve, as well as the low-noise
compressors, the liquefier and the electrical control system.
At low ambient temperatures, humidity accumulates on the evap-
orator in the form of frost, reducing the transfer of heat. The
evaporator is defrosted automatically by the heat pump as re-
quired. Steam may be emitted from the air outlet depending 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 refrigerant
is brought to a higher temperature level using the compressor.
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Heat is transferred to the surrounding air via the liquefier (which,
in heating operation, functions as an evaporator).
The waste heat can also be used for hot water preparation,
swimming pool or bathroom heating, via the additional heat ex-
changer.
3

Scope of supply

3.1 Basic Device

The heat pump is of compact design and is supplied complete
with the components listed below.
The refrigerant circuit is "hermetically sealed". It contains the
Kyoto protocol-approved refrigerant R417A with a GWP value of
1950. It is CFC-free, does not deplete ozone and is non-flam-
mable.
1) Evaporator
2) Liquefier
3) Ventilator
4) Switch box
5) Compressor 1
6) Compressor 2
7) Filter dryer
8) Expansion valve
9) Collector
10) Hot water liquefier
3.1
EN-3