Vaillant ecoMAX pro SERIES Instructions For Use Installation And Servicing

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Vaillant ecoMAX pro SERIES Instructions For Use Installation And Servicing Manual pdf 11 page image

Water system 5Instructions for Use, Installation and Servicing ecoMAX pro 115.9.3 Pressure GaugeA pressure gauge with a set pointer and covering atleast 0 to 4 bar (0 to 60 lb/in2) shall be fitted perma-nently to the system in a position where it can be seenwhen filling the system.5.9.4 Domestic Hot Water CylinderThe domestic hot water cylinder must be of the doublefeed fully indirect coil type. It must be suitable forworking at a gauge pressure of 0.35 bar above thesafety valve setting.5.9.5 Water MakeupProvision should be made for replacing water loss fromthe system using a make up bottle mounted in a positionhigher than the top point of the system, connectedthrough a non-return valve to the return side of eitherthe heating circuit or the hot water cylinder.Alternatively, provision for make up water should bemade using a proprietary filling loop.5.9.6 Filling a Sealed Water SystemProvision for filling the system at low level must bemade. This can be achieved by the use of a proprietaryfilling loop.5.10 Water TreatmentFor optimum performance the boiler and its associatedcentral heating system should be flushed in accordancewith BS7593: 1992 using a cleanser.For advice on the application of system cleansers andinhibitors contact either;Fernox, Alpha-Fry TechnologiesTandem HouseMarlow WayBeddington Farm RoadCroydon CR0 4XSTel: 0870 601 5000Fernox technical help line01799 550811or:Sentinel, GE BetzWidnesCheshire, WA8 8UDTel: 0151 420 95955.9 Sealed water SystemsThe installation must comply with the appropriaterequirements of the current issue of BS4814, BS5449,BS6759, BS6798 and BS7074 Part 1 and 2. For IE yourattention is drawn to the current edition of IS 813.See Fig. 5.4 for a suggested layout.Fig. 5.45.9.1 Safety ValveA safety valve must be fitted to a sealed system.It shall be preset, non-adjustable with a lift pressure of3 bar, incorporating seating of a resilient material, a testdevice and a connection for drain.The safety valve discharge pipe must be routed tooutside the building, must not discharge above anentrance or window or any type of public access area, beclear of any electrical fittings and positioned so that anydischarge can be seen.5.9.2 Expansion VesselA diaphragm type expansion vessel, conforming to thecurrent issue of BS4814 (see also BS7074 Part 1 and 2).For IE the current edition of IS 813, must be connectedat a point close to the inlet side of the circulating pump,see the diagrammatic layout, Fig. 5.4. unless laid downdifferently by the manufacturer.The expansion vessel volume depends on the total watersystem volume and the initial system design pressure.For any system an accurate calculation of vessel size isgiven in the current issue of BS5449 and BS7074 Part 1.Example: For an initial design pressure of 0.7 bar, theminimum total vessel volume required is 0.063 x TotalSystem Volume.Note!A higher initial design pressure requires a largervolume expansion vessel.The charge pressure must not be less than thestatic head of the system, that is, the height of thehighest point of the system above the expansion vessel.3 LITRES (0.66 gals)MAKE-UP BOTTLE(if required)NON-RETURNVALVEAUTOAIRVENTFLOWDRAINCOCKBOILERSAFETYVALVE(Make-upalternatives)EXPANSIONVESSELPRESSUREGAUGECIRCULATINGPUMPFILLING POINTAIRRELEASEPOINTHEATINGCIRCUITBY-PASS 'B'IF REQUIREDFLOWCONTROLVALVE 'A'FLOWCONTROLVALVE 'A'