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2
Purpose of the
swimming pool heat
pump
2.1 Application
The swimming pool heat pump is suitable for heating swimming
pool water or saline water.
The heat pump is equipped with an automatic evaporator de-
frosting (de-icing) system. The heat pump may also be operated
in frosty external air temperatures, providing operating limits and
conditions are observed.
2.2 Operating Principle
The surrounding air is drawn in by the ventilator and fed via a
finned heat exchanger, which extracts heat from the air. This en-
ergy difference is then transferred to the working medium (refrig-
erant) in the heat exchanger.
An electrically driven compressor "pumps" this extracted heat to
a higher temperature level by increasing its pressure. The heat is
then transferred to the water via a titanium heat exchanger.
During heating operation, electrical operating energy is used to
raise the temperature of the heat in the environment to a higher
level. Because energy extracted from the air is transferred to the
water that is to be heated, this device is referred to as an air-to-
water heat pump.
The swimming pool heat pump consists of the main components:
evaporator, ventilator and expansion valve, as well as the low-
noise compressor, liquefier (titanium heat exchanger) and the
electrical control system.
During heating operation at low ambient temperatures, humidity
accumulates on the evaporator in the form of frost, impairing heat
transfer. The evaporator is automatically defrosted according to
need. Depending on atmospheric conditions, steam (water va-
pour) may be briefly visible in the immediate vicinity of the air
inlet or outlet when restarting.
E-4
All manuals and user guides at all-guides.com
2.3 Dimensioning the swimming
Outdoor swimming pool
The heat consumption for heating the water in an outdoor swim-
ming pool depends strongly on the respective usage.
In terms of size, it can easily be the same as the heat consump-
tion of a house - and in such cases must be calculated sepa-
rately.
An approximate estimation of the heat consumption is dependent
on the windage factor, the climatic conditions, the periods of use
and whether or not the pool has a cover.
With cover
Without cover
Sheltered location
Without cover
Partly sheltered loca-
tion
Without cover
Unsheltered location
(subject to high winds)
Reference values for the heat consumption of
outdoor swimming pools used between May and
September
For initially heating the pool to a temperature of over 20 °C, the
quantity of thermal energy required is approx. 12 kWh/m
volume. Heating-up periods ranging from one to three days are
required depending on the size of the pool and the output of the
installed heating system.
Indoor swimming pool
Room tempera-
Reference values for the heat consumption of
indoor swimming pools
These outputs can be reduced by up to 50 % for private swim-
ming pools with a cover that are used for a maximum of 2 hours
per day.
pool heat pump
Water temperature
20 °C
1
2
100 W/m
2
200 W/m
2
300 W/m
2
450 W/m
1. Reduced values for pools with a cover only refer to private swimming pools
used on average up to 2 h per day.
Space heating
Space heating is carried out using radiators or underfloor
heating and/or a heat exchanger in the dehumidification/
ventilation system. In both cases it is necessary to calculate
the heat consumption - according to the system installed.
Hot water heating for a swimming pool
The heat consumption depends on the pool temperature,
the temperature difference between the pool temperature
and the room temperature, and the pool usage.
Water temperature
ture
20 °C
2
23 °C
90 W/m
2
25 °C
65 W/m
2
28 °C
20 W/m
24 °C
28 °C
2
2
150 W/m
200 W/m
2
2
400 W/m
600 W/m
2
2
500 W/m
700 W/m
2
2
800 W/m
1,000 W/m
3
pool
24 °C
28 °C
2
2
165 W/m
265 W/m
2
2
140 W/m
240 W/m
2
2
100 W/m
195 W/m
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