Airedale EasiCool 6kW 64kW - Manual (Page 21)

EasiCool™ Precision Air Conditioning
Humidification
Control Principles
In a humidifier with electrodes, steam shall be produced by passing a current between electrode plates to generate heat.
The higher the current being passed between the electrodes, the greater the quantity of steam that is produced.
To modulate the rate of steam production, this system shall vary the level of water within the cylinder, thereby increasing
the immersion level of the electrodes and the current being passed between them. The more conducting area that is
available to pass current between the electrodes, the larger the amount of steam that shall be produced.
Modulated by the controller, the water level is varied so that the level of steam being produced ensures that the room
humidity set-point is continually maintained within a tight tolerance.
Optimised Lifetime
The life span of the Airedale humidification system shall be optimised by the inclusion of a water conductivity sensor
into the bottle feed. This sensor shal determine the conductivity level of the supply water and by using an algorithm
embedded in the software, determines the frequency that the bottle should be drained.
Example: (Optimised Lifetime with High Water Conductivity Supply)
As liquid water is boiled off into steam, mineral deposits are left in solution increasing the conductivity of the water.
To counter this, the intelligent software increases the frequency of drain meaning that the replenishing supply water
keeps the concentration of minerals diluted. By maintaining an acceptable mineral concentration, the bottle life span is
maximised.
De-humidification
(With Electric Heating and Humidification only)
Controlled by the microprocessor the de-humidification feature reduces fan speeds by 20% (adjustable). The reduction
of fan speed increases de-humidification which means that the time taken to reduce the room humidity to the required
level is drastically decreased, along with the energy required to do so.
The return temperature is monitored during de-humidification to ensure that the temperature does not fall to a critical
level. If the temperature reaches the low limit de-humidification is cancelled until the return air temperature increases.
21 EasiCool Technical Manual 7525389 V1.1.0_02_2013
Introduction