Air handling units for swimming pools
Sound power level
Sound power level at the supply air fan discharge and the return air fan intake (option), to be taken into account when calculating the silencer required:
110 140 180 230 265 315 355
Sound pressure level
Measurement conditions: in a free field, measured at a distance of 5 metres, directivity 2 and 1.5 metres from the ground.
110 Standard device
NOTE: the sound pressure level depends on the installation conditions and is only given as a guide.
Assembly inside unit.
400 V/3 ph/50 Hz 3 6 9 12 15 18 24 27 36 54
The plates exchangers of Aquair BCP units are made up of SMO-254 stainless steel, and the material used for the plates welding is pure copper. The attached table indicates the behaviour to corrosion for stainless steel SMO-254 with respect to different compositions of water. Values outside these ranges may suppose corrosion problems. If the pool water is introduced directly into the unit water condenser, the addition of chlorine should never be carried out before the inlet to this condenser. These exchangers should never be used in swimming pools with electrolysis efficiency treatment. In these cases it is necessary to install intermediate titanium exchanger, otherwise serious corrosion problems may occur. In the case of a longer standstill, leave the exchanger full of water pool without flowing or empty may cause corrosion problems. During periods of inactivity it is mandatory to fill up the hydraulic circuit of the exchanger completely with demineralised water. To isolate the hydraulic circuit of the rest of the installation, the installer must have shut-off valves at the input and output, and a drain for emptying.
Water content Alkalinity (HCO3-) Sulphate (SO42-) HCO3Concentration < 70 70 - 300 > 300 < 70 70 - 300 > 300 > 1.0 < 1.0 < 10 S/cm 10-500 S/cm > 500 S/cm < 6.0 6.0 - 7.5 7.5 - 9.0 > 9.0 <2 2 - 20 > 20 < 100 100 - 200 200 - 300 > 300 SMO-254 Within 24h No limit No limit No limit + + + + + + + + + + + 0 + + + + + + + + + + Water content Free chlorine (Cl2) (H2S) Free (aggressive) carbon dioxide (CO2) Total hardness (ºdH) Nitrate Iron (NO3-) (Fe) Concentration <1 1-5 >5 < 0.05 > 0.05 <5 5 - 20 > 20 4.0 - 8.5 < 100 > 100 < 0.2 > 0.2 < 0.2 > 0.2 < 0.1 > 0.1 SMO-254 Within 5 horas No limit No limit No limit No limit No limit No limit No limit + 0 + + + + + + + + + + + + + +
Electrical conductivity pH Ammonium (NH4+) Chlorides (Cl-)
Aluminium (Al) Manganese (Mn)
Legend: + Good resistance under normal conditions. 0 Corrosion problems may ocurr specially when more factors are value 0. - Use is not recommended.
Sulfates and nitrates works as inhibitors for piping corrosion caused by chlorides in pH neutral environments. In general, low pH (below 6) increases corrosion risk and high pH (above 7.5) decreases the corrosion risk. Fe3+ and Mn4+ are strong oxidants and may increase the risk for localised corrosion on stalinless steels. SiO2 above 150 ppm increase the risk of scaling.
HEAT PUMPS - AIR CONDITIONING - REFRIGERATION - AIR HANDLING - HEAT EXCHANGE - NA 17.01 A