Installation Manual - Unical Lattner Condensing Hot Water Boilers

Instructions for the installer3.11 - PRESSURE RELIEF VALVE DRAINPIPEA pressure relief valve must be fitted on the flowpipe, within 0,5 m from the boiler. It must bedimensioned for the capacity of the boiler andmust comply to the regulations in force,WARNING!Please remember that it is forbidden tointerpose, between the boiler and thepressure relief valve, any type of cutting-offdevice. Moreover it is recommended to usecutting-off valves which do not exceed themaximum allowable operating pressure.WARNING!In correspondence to the heating pressurerelief valve foresee the installation of adischarge pipe with a funnel and a siphonwhich lead to an adequate drainage. Thedrainage has to be controllable by sight.If this precaution is not made, an eventualintervention of the pressure relief valve couldcause injury to persons, animals or damageto property. The manufacturer shall not beheld liable for any injury and/or damage.3.12 - WORKING PRESSUREThe boiler’s maximum allowable working pressure is set at3 bar; whilst the minimum pressure is pre-charged to 0,5bar.WARNING!The boiler does not have any specific protectivedevice against water loss, as this function iscarried out promptly by the overheatthermostat.However, on the boiler’s electronic board, thepossibility of connection to a minimumpressure switch is foreseen..20