E-3
English
3.1
2 Purpose of the Heat
Pump
2.1 Application
The air-to-water heat pump is designed for use in existing or
newly built heating systems.
It is designed exclusively for heating domestic hot water and
heating water!
The heat pump is suitable for mono energy and bivalent opera-
tion down to an external temperature of -20 °C.
Proper defrosting of the evaporator is gua ranteed by mainta ining
a heating water return flow temperature of more than 13 °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. The additional
heat consumption should be met using special devices provided
by the customer. If a building is to be dried out i n autumn or win-
ter, we recommend installing an additional heating element
(available as an accessory).
ATTENTION!
The device is not suitable for operation with a frequency converter.
2.2 Operating Principle
Surrounding air is drawn in by the ventila tor and fed via t he 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 “pumped” to a higher temperature l evel by increasing
its pressure with the aid of electrically driven compressors. It is
then transferred to the heating water via the liquifier (heat ex-
changer).
Electrical energy is used to raise the temperature of the heat in
the environment to a higher level. Because the energy extracted
from the air i s transferred to the h eating water, thi s 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 liquifie r and the electrical co ntrol system.
At low ambient temperatures, humi dity accumulates o n the evap-
orator in the fo rm of frost reducing th e transfer of heat. The evap -
orator is defrosted automatically by the heat pump as required.
Steam may be emitted from the air outlet depending on the at-
mospheric conditions.
3 Scope of Delivery
3.1 Basic Device
The heat pump is of compact design and is supplied complete
with the components listed below.
R290 (propane) is used as refrigerant.
1) Evaporator
2) Ventilator
3) Switch bo x
4) Filter dryer
5) Expansion valve
6) Liquifier
7) Compressor