Duplex _ WATER SOFTENERS

Transcription

1 Duplex _ WATER SOFTENERS

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3 CONTENTS water softening _02 duplex water softeners _03 main components _04 technical characteristics _06 dimensions and weights _07 typical installation _08 handbook _10 1

4 Water softening In nature, water usually contains calcium and magnesium salts, which result in the property of hardness and in the formation of limescale due to precipitation of the mineral contents. The process adopted to reduce water hardness is called "softening". Water is softened by causing it to flow through a layer of ion exchanger resins that transform calcium and magnesium ions into sodium ions, which are soluble and hence do not form scale. When the resins are saturated with calcium and magnesium they are reactivated by means of a sodium chloride solution (regeneration). Regeneration of the resins is completely automatic. During the regeneration process the water softener automatically functions in by-pass mode to ensure water is supplied to the point of use. WHAT ARE THE BENEFITS? The presence of large amounts of calcium and magnesium will result in the formation of deposits over the medium/ long-term, with the consequent fouling of pipes and decline in boiler efficiency. This leads to a rise in heating costs of around 20% / year. Hard water will also damage home appliances, particularly washing machines and dishwashers. These are just examples to demonstrate the importance of a water softening system, which will increase the working life of appliances, guarantee more efficient operation of home and professional heating systems, improve the operation and extend the working life of solar thermal systems, and in general of all applications involving the use of water. Using softened water in an average 4-person household produces: 55% Saving of detergent and soap 33% Saving on wear and tear of laundry 60% Saving of domestic hot water energy costs (2mm thick scale) 92% Saving on maintenance costs of: boilers, water heaters, dishwashers, pumps 2

5 Duplex _ WATER SOFTENERS Duplex water softeners In duplex systems (double column), resin regeneration is programmed to occur on the basis of the volume of water supplied. The columns are regenerated in alternation, so one column is always functioning while the other is either undergoing regeneration or in stand-by mode. The system is managed automatically by an electronic controller that establishes: Regeneration start of depleted column. Functions changeover between the two columns. Hydro-pneumatically controlled diaphragm valves are used to shut off the water outlet flow during regeneration or stand-by stages. The controller responds to signals transmitted by a pulse trigger litre counter installed on the system outlet. Thanks to the two fibreglass cylinders interconnected by means of a controller that alternates the regeneration process, the above water softeners can supply softened water 24h/day without interruption. All our water softeners are constructed in compliance with Italian decree no. 25 of 7 February

6 Main components Practical and ergonomic version designed for easy installation. The entire system is supplied preassembled on a skid made of stainless steel throughout. Brine tank. Made of non-toxic polyethylene, complete with overflow well, grid and float valve. Resin cylinder, made of composite material with PE liner clad in fibreglass and epoxy resin. Suitable for potable and industrial treatment systems; compliant with European pressure equipment Directive 97/23/EC (PED); TUV certified for contact with potable water according to EC and KTW directives; compliant with Italian ministerial decree no. 174 of 6 April 2004 for materials suitable for contact with safe drinking water. Maximum operating pressure 10 bar Maximum operating temperature 50 C Operating test to 250,000 cycles from 0.7 to 10 bar Burst pressure tested at 4 times maximum operating pressure Colour: blue 4

7 Duplex _ WATER SOFTENERS The automated system is composed of two valves, in ABS and fibreglass, controlling all service and regeneration stages. Models for different flow rates in accordance with the demands of the application. Hydro-pneumatically controlled diaphragm valve in N.O. version. To allow automatic changeover between the columns for regeneration in order to obtain a supply of softened water 24 hours/day. Alternated VOLUME electronic timer. Litres available and active column are shown on the display. The timer features an internal memory and back-up battery for data retention during mains lower losses. The electrical section operates on low voltage (12V) supplied by the transformer on the 230V power line. Turbine type pulse trigger litre counter with reed switch pulse emitter. OPTIONAL: Automatic sanitiser for resin disinfection. Blending by-pass for manual adjustment of the required degree of residual hardness. 5

8 Technical characteristics General technical data Water inlet temperature: min+5 C max +30 C Pressure: min 2 - max 6 bar Timer: electronic volume type Power supply: 230Vac (±10%) - 50Hz (± 3%) All Idrobios water softeners are equipped with strong food grade cation ion exchange resin. Model Resin quantity [l] Cyclic capacity [m 3 / f] Peak flow rate* [m 3 /h] Nominal flow rate [m 3 /h] p** [bar] Salt consumption [kg] Brine tank capacity [l] min max min max AD25/132SVD < x100 AD40/132SVD x100 AD50/132SVD x150 AD75/132SVD x150 AD100/132SVD x200 AD125/132SVD x200 AD150/132SVD x300 AD100/230SVD x200 AD125/230SVD x200 AD150/230SVD x300 AD200/230SVD x300 AD150/250SVD x300 AD200/250SVD x300 AD250/250SVD x500 AD300/250SVD x500 For technical flow rates (water outlet from softener at 0 f) consider a flow rate value of <20%. The values of flow rate and cyclic capacity (which varies in accordance with calcium-magnesium salt values in the untreated water) are for 30 f hardness, 20 C temperature, and 3 bar inlet pressure. *Peak Flow Rate - available only for several minutes ** p - Pressure drop with respect to nominal flow rate 6 All our water softeners are constructed in compliance with Italian decree no. 25 of 7 February 2012.

9 Duplex _ WATER SOFTENERS Dimensions and weights in out HB HC HA LC L LC P DIMENSIONS [mm] Model L P LC HC HA HB Connections WEIGHT [kg] operating AD25/132SVD AD40/132SVD AD50/132SVD AD75/132SVD AD100/132SVD /4 405 AD125/132SVD /4 490 AD150/132SVD /4 550 AD100/230SVD /2 409 AD125/230SVD /2 494 AD150/230SVD /2 554 AD200/230SVD /2 611 AD150/250SVD /2 558 AD200/250SVD /2 615 AD250/250SVD /2 767 AD300/250SVD /2 951 Overall dimensions may be altered without notice The quoted weight values are construed as guideline 7

10 Typical installation Suitable installation site: clean and dry, not exposed to sunlight, accessible for maintenance. Presence of drain connection within 4 metres from point of installation. 1 4 Power supply 230 V Untreated water inlet To Services Key: 01 - Check valve 02 - Upstream shut-off valve 03 - Untreated water outlet 04 - Safety filter 05 - By-pass 06 - Softened water outlet 07 - Downstream shut-off valve 08 - Pulse trigger litre counter 09 - Stainless steel skid 10 - Brine tank 11 - Softener Cylinder 12 - Chlorine generator (if required) V mains power supply for timer 14 - Water softener drain 15 - Brine overflow drain 16 - Hydro-pneumatic valves 17 - Brine suction 18 - Softened water outlet 8

11 Duplex _ WATER SOFTENERS Never install the drain line directly in a sewer or culvert. Always leave a space as shown in the figure. Space Drain Maintenance For perfect operation of the equipment carry out a series of simple and indispensable maintenance tasks: Addition of consumables (salt) visible through the opening in the cover on top of the tank. Cleaning brine tank to remove salt residues. Cleaning or replacement of water softener upstream prefilter cartridge. Conformity Constructed in compliance with: Italian ministerial decree 25 of 7 February 2012 Italian ministerial decree 174 of 6 April 2004 In compliance with European Directives (Low Voltage, Electromagnetic Compatibility, RoHS and WEEE), Laws and Regulations. 9

12 Handbook The following parameters are required for correct water softener sizing: Daily water consumption per person (approx [m 3 /day]). Water hardness in [ f] (1 f=10mg of CaCO 3 ), measured with a tester. The following must be taken into account: The average salt quantity required to regenerate one litre of resin is approximately 150 g/l. The maximum quantity of salt that dissolves in one litre of water is 250 g/l. To find the litres of resin required for one day of water softening use the following data: 1 l of resin = H 2 O for 24 hours [l] x hardness [ f] 6,000 [l/ f] Having specified the exchange capacity of 1 l of strong cation resin as [l/ f]. Calculation example of litres of softened water produced by a water softener. To obtain current values use the litres of resin effectively contained in the water softener. Water softener resin contents [l] x 6,000 [l/ f] Litres of treated H 2 O = Hardness [ f] Calculation of salt consumption for each regeneration cycle of a given water softener. salt (g) = Water softener resin contents [l] x 150 [grams per litre of resin] Finally, check the required water contents in the brine tank of a given water softener. Litres of H 2 O in Brine Tank = Water softener resin contents [l] x 150 [grams per litre of resin] 250 [grams of salt per litre of water] 10

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