manuale_EMERITUS_4.0_(MULTI_LANGUAGE)

21 4 FAN The fans installed on the system has to be electronic (EC). After an interval of 4 weeks of inactivity, a running period of 3-5 hours is recommended. Cleaning the finned pack by using the fans is programmable by the controller, and consists of the activation of the fans at a preset speed and for a preset duration, with inverted direction of rotation. The function starts only with the unit switched on (see controller manual details). 5 QUALITY OF WATER SUPPLIED TO THE SYSTEM For Emeritus to function correctly, the water in the system must have the following characteristics in compliance with Directive 98/93/CE concerning drinking water. Additionalty the followings limit has to be considered: Limits for Emeritus Conductivity [µS/cm] 800 Fixed residue [mg/l] 500 Chlorides [mg/l] 100 Sulphates [mg/l] 50 Hardness[°f] 4 – 6 Indicative softener ratio [°f in / °f out] 7 PH 6.5 – 8 This primary source water must undergo a softening process before being nebulized to reduce hardness to a value between 4 and 6 °f . • Complete Emeritus system (spray + adiabatic panel): annual use is generally limited to 2000 hours; the value is automatically balanced by the control system which modulates the water supplied to the exchanger and adiabatic panel depending on the load and the ambient temperature. • System with adiabatic panel only: no limits are set for annual operation (if non-treated water is used, it is necessary to increase water quantity by 30%). • System with spray only: annual use limited to 300 hours. On request, LU-VE can offer a water treatment system. Contact LU-VE for more information. In the event that water from an osmosis plant is used, a special version of the spray system is constructed in stainless steel at additional cost. It is also necessary to add the special protective agent LU-WET 82 which is completely biodegradable. In this case, there are no particular constraints on the maximum annual number of hours of operation of the Spray system.