10
SET Energietechnik Ltd. * August-Blessing-Str. 5 * D-71282 Hemmingen * Tel.: +49 (0)7150 9454-0 Fax: +49 (0)7150 2337
3.
Technical data
3.1
Choice of equipment
Choosing the right open-air swimming pool heat pump depends on the required heat pump
performance. This is dependent on the pool type and size. A pool with an overflow gutter has
a larger water surface and thus may have higher losses than a pool with a skimmer. The
greatest loss factor with an open-air swimming pool is the evaporation losses. These losses
increase dramatically in the case of an unprotected water surface. A constant light breeze
over the water surface guarantees significant evaporation losses, and thus also heat losses.
A further loss factor is convection losses, i.e. the heat transfer to air and ground. These two
types of losses represent in total approx. 75% of the heat losses from an open-air swimming
pool. Insulation of the pool in the ground and the use of a cover reduce these losses
significantly. Heating an open-air swimming pool without a cover involves approximately 3-
fold higher investment and operating costs.
The “Silent” open-air swimming pool heat pumps have hot gas defrosting, which even
ensures continuous operation in the range below +8°C.
3.2
Open-air swimming pool heat pump
The SET open-air swimming pool heat pump is a device for outdoor installation. A canopy or
an enclosure is, in principle, not necessary. The installation of the heat pump should be
carried out on a level and firm base. The clearance from buildings, walls or partitions should
be at least 1 m on the air outlet side. On the air intake side, we recommend a clearance of at
least 0.5m to such obstacles.
In heating mode, the heat pump blows out cold air on the fan, and hot air in cooling mode.
This area is not suitable for planting of any kind.
3.3
Accessories
Below, we have given an overview of the accessories available for the devices. For the
features of your device, please refer to the delivery note.
3.3.1
External On/Off
The heat pump can also be switched on or off externally. This requires the use of a potential-
free switch to contact X1 3/4, connected in series. If this switch is open, the regulator is off
and the heat pump will not work. If this switch is closed, the regulator is switched on. After a
short time (about 1 minute) the fan and the compressor will then switch on.