GEA CAIRfricostar - Aspectenvironmental.com
GEA CAIRfricostar - Aspectenvironmental.com
GEA CAIRfricostar - Aspectenvironmental.com
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<strong>GEA</strong> <strong>CAIRfricostar</strong><br />
Dehumidification unit with air mixing and heat pump function<br />
Type CMU<br />
Functional description of the unit<br />
The <strong>GEA</strong> <strong>CAIRfricostar</strong> CMU is designed for private and small public swimming pools.<br />
The series is available in 6 sizes. The unit's function is to dehumidify and heat air in<br />
swimming pools in air mixing mode. The unit is delivered with a DDC controls which<br />
regulates all functions of the system on a fully automated basis.<br />
When in idle mode without dehumidification the air is recirculated in the swimming pool.<br />
When the humidity setpoint has been exceeded the unit switches into dehumidification<br />
mode. At this point the supply air fan is switched into speed 2 and the exhaust air fan<br />
maintains air circulation at speed 1. The refrigeration unit is activated in order to start<br />
dehumidification. Using the bypass damper a certain part of return air is mixed without<br />
further treatment with dehumidified air that has passed through the refrigeration cycle.<br />
The dehumidification stage continues until the actual humidity value lies below that of<br />
the humidity setpoint. After that the fan is switched back into previous speed and the<br />
refrigeration cycle is stopped.<br />
When in active hours swimming pool mode the fresh and exhaust air dampers are<br />
opened, the bypass damper is closed. The dehumidification takes place via the activation<br />
of the refrigeration cycle with both fans switched into speed 2.<br />
Using an optional pool water condenser a certain amount of excess energy produced<br />
by the refrigeration cycle can be fed back into swimming pool water.<br />
Air mixing dehumidifier CMU<br />
Sample selection of operating modes:<br />
Idle mode without dehumidification<br />
demand<br />
Idle mode with dehumidification<br />
demand<br />
Active hours operation mode with<br />
dehumidification demand<br />
28°C<br />
H<br />
Bypass damper mode, exhaust air fan is deactivated,<br />
supply air fan runs at low speed.<br />
Bypass damper mode, exhaust air fan runs at<br />
low speed, supply air fan runs at high speed.<br />
The reheater provides the missing residual<br />
heat supply.<br />
Air mixing operation according to VDI, exhaust<br />
and supply air fans run at high speed.<br />
Compressor is switched on. The reheater<br />
provides the missing residual heat supply.<br />
Using a pool water condenser a certain<br />
amount of excess energy can be fed back<br />
into swimming pool water.<br />
Transition and summer mode with/without<br />
dehumidification demand<br />
Summer mode inactive period „free night cooling“<br />
In case of overheating of the swimming pool and high outdoor temperatures<br />
the heat pump is blocked. The unit operates for ventilation<br />
and dehumidification in air mixing or only outdoor/exhaust air mode.<br />
The fans run at high speed. In case of an optional bypass of the heat<br />
recovery system the latter is not used thanks to a damper system.<br />
If the swimming pool is overheated during the night time or idle period<br />
the unit ventilates only in outdoor/exhaust air mode. The fans run at<br />
high speed and provide cooling of the swimming pool to reach the<br />
setpoint temperature.<br />
PR-2008-0327-GB • Subject to modifications • Status 05/2009 7
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