Hamworthy F40H Installation, Commissioning And Operating Instructions

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Hamworthy F40H Installation, Commissioning And Operating Instructions Manual pdf 68 page image

HAMWORTHY HEATING LTD62FLEET H series 500001212/FAPPENDIX E - WATER DATAE1.1 Water Circulation SystemThe Fleet boiler has a low water content and the requirements of minimum water flow are given in the abovetable. To ensure these minimum requirements are achieved each boiler is fitted with an integral pump forcirculation through the boiler and primary circuit supplemented by an integral flow switch. Recommendations forthe water circulation system are given in BS 6644 and CP 342.The following details are of particular importance for the correct installation of the water circulation system:1) In a combined central heating and hot water system the hot water storage vessel must be of theindirect cylinder or calorifier type. The hot water storage vessel should be insulated, preferably withnot less than 75mm (3”) thick mineral fibre, or its thermal equivalent.2) Circulating pipe work not forming part of the useful heating surface should be insulated to helpprevent heat loss and possible freezing, particularly where pipes are run through roof spaces andventilated cavities. Cisterns situated in areas which may be exposed to freezing conditions shouldalso be insulated. Furthermore, insulation exposed to the weather should be rendered waterproof.3) Drain valves must be located in accessible positions which permit the draining of the whole system,including the boiler and hot water storage vessel.4) Each boiler module has flow and return connections as detailed in the table above. Multiple boilersshould be connected by flow and return headers. Hamworthy strongly recommend that boilers areconnected in a primary circuit configuration utilising a low loss header arrangement to enablesecondary circuits to be connected to the header. Figure E1.1.1 on the following page show typicallayouts.5) Ideally, individual valves should be fitted to each module to enable isolation from the system,however, the arrangement must comply with the requirements of BS 6644.E1.2 Pressure Relief Valve (Safety Valve)The most important single safety device fitted to a boiler is its safety valve. Each boiler module is provided with anintegral safety valve terminating at the return pipe at the rear of the boiler. BS 6644 provides comprehensiveinformation for the selection and location of safety valves and attention is drawn to the higher capacityrequirements of safety valves for pressurised hot water systems.E1.3 Altitude Gauge (Water Pressure Gauge)Every boiler or group of boilers should be provided with an altitude gauge complete with isolating valve. SeeFigure E1.1.1 for typical position.E1.4 Open Vent and Cold Feed Pipe.Every boiler or group of boilers should have an open vent pipe and cold feed pipe installed between the boiler andthe first water isolating valve. The minimum bore (mm) of these pipes per installation is shown in the table. TheWATER DATA BOILER MODELF40H F50H F60H F70HWater connections (Flow & Return) - BSP R 1”Maximum Water Pressure - bar g 6.0Minimum Water Pressure - bar gWater content (not including headers) - litres 4.0 4.0 5.0 5.0Design Flow Rate @ 20°C ∆T Rise - litre/s 0.48 0.6 0.72 0.84Waterside Pressure Loss @ 20°C ∆T Rise - mbar 70 80 80 1000.5Residual pump performance available - mbar 270 200 140 60F85H F100H F125H F150HWater connections (Flow & Return) - BSP R 1” Rp 1¼”Maximum Water Pressure - bar g 6.0Minimum Water Pressure - bar gWater content (not including headers) - litres 6.0 6.0 7.0 8.0Design Flow Rate @ 20°C ∆T Rise - litre/s 1.02 1.19 1.49 1.79Waterside Pressure Loss @ 20°C ∆T Rise - mbar 100 110 140 4000.5Residual pump performance available - mbar 420 340 220 300