Nordica TERMOSOVRANA DSA Instructions For Installation, Use And Maintenance Manual

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Nordica TERMOSOVRANA DSA Instructions For Installation, Use And Maintenance Manual Manual pdf 23 page image

TermoSovrana DSA7094211 – EN 23delivery. This will be replaced with as much cold water coming from the open expansion tank loading pipe ofopen tank by draining away the excessive heat.5. SAFETY VALVE FROM 1,5bar: maximum operation pressure allowed for the system is 1,5 bar (equal to 15mof the water column). Higher pressures can cause deformation and breakage of the boiler body.6. SAFETY DEVICES envisioned by Regulations in vigour.7. CIRCULATION PUMP : It would be better to install it on the return in order to avoid that it could disconnect itselfat very high water temperatures but checking that it does not drive water in the open expansion tank otherwise itshould cause a continuous water oxygenation with consequent, fast corrosion of boiler body. It must be not toavoid a forced circulation in the open expansion tank. Furthermore it must be electrically connected to athermostat or a electronic control unit that can be purchased with the thermo-fireplace as OPTIONAL part.8. AUTOMATIC THERMOSTATIC MIXING VALVE – (see chapter 3.3)IMPORTANT: temperature safety sensors must be in place on the machine at a distance no greater than 30 cm fromthe flow connection of the thermo-product.Whenever the thermo products lack a device, those missing can be installed on the thermo product flow pipe, within adistance no greater than 1m from the thermo product.ATTENTION: For no reason must the fire be ignited before the system has been completely filled with water;doing this would lead to serious damage of the entire structure. The system must be filled by means of theloading pipe directly from the open vessel tank in a way to prevent an excessive water pressure networkdeforming the body of the thermoheating stove.The system must be kept constantly full of water even during the periods when the use of the thermoheating stove isnot requested. During the winter, inactivity must be faced with the addition of antifreeze.3.2. CLOSED expansion VESSEL systemIt is COMPULSORY that the CLOSED expansion VESSEL system is provided with:1. A 3 bar SAFETY VALVE: maximum operation pressure allowed for the system is 3 bar (equal to 30m of thewater column). Higher pressures can cause deformation and breakage of the boiler body2. AUTOMATIC THERMOSTATIC MIXING VALVE – (see chapter 3.3)3. HEAT DISCHARGE VALVE or HEAT SAFETY DISCHARGE (positive safety, therefore, this continuesdischarge, should the valve be damaged)4. CLOSED EXPANSION VESSEL5. PUMP CONTROL THERMOSTAT6. NOISE ALARM ACTIVATION THERMOSTAT7. NOISE ALARM8. TEMPERATURE INDICATOR9. PRESSURE INDICATOR10. PUMP SYSTEMIMPORTANT: temperature safety sensors must be in place on the machine at a distance no greater than 30 cm fromthe flow connection of the thermo-product.Whenever the thermo products lack a device, those missing can be installed on the thermo product flow pipe, within adistance no greater than 1m from the thermo product.IT IS MANDATORY that the thermo products for domestic heating inserted in CLOSED VESSEL heating systems,must be internally equipped, with a cooling circuit, prepared by the unit manufacturer, which is activated by a thermalsafety valve (see chapter 3.4) which does not require auxiliary power and can guarantee that the standard settemperature limit is not exceeded. Connection between the power supply unit and the valve must be free frominterceptions. Cooling circuit upstream pressure must be at least 1,5 bar.3.3. AUTOMATIC THERMOSTATIC MIXER VALVE (OPTIONAL)The automatic thermostatic mixer valve finds applications in solid fuel heat generators as it prevents cold water returnin the exchanger.Routes 1 Picture 2 and 3 are always open and, along with the pump installed on the return (R), the guarantee watercirculation inside the biomass boiler exchanger (CB).