Brunner USA Instructions - Robeys Ltd

The vacuum circuit breaker safety (USA) is used in rooms where aroom sealed combustion and ventilation system can be operatedsimultaneously and shutdown due to an external fault (eg responseto a vacuum monitoring is required to the appliance).The USA is used to monitor a minimum pressure differencebetween the room where the fireplace and the exhaust pipe to ensureadequate combustion air supply and the safe transfer of theflue gases. Falls below a minimum pressure difference in theventilation system (at least the exhaust air fan) will switch the fanoff.The USA can work with all air-ventilated manually fed furnacesaccording to DIN EN 12815, DIN EN 13229 and DIN EN 13240.The design of the stove installation is done without consideration ofthe ventilation system of the Installation room. This ensures thatthe air supply to the combustion process by switching off theventilation is guaranteed by USA.For systems that are monitored by the USA, multiple usage of thechimney is not allowed!Note the maximum temperature stresses (see technical details).This manual, especially the entries in the chapter 'Setting the USA'are from operators preserved and passed on request to the BSMBrunner USA Installation & Operation Manual 6August 2013