Bosch 250 SXO LP User Manual

Also see for 2400 EO NG: User manual Service bulletin Manual

Contents

6 720 607 440Appliance details132.10 Water connectionsWhen facing the heater, the ¾” cold water inlet is on thebottom right and the hot water outlet is on the bottomleft. Install the heater where it’s centrally close to hotwater use points if possible, and make hot water pipingruns as short as possible.Fig. 15B THE USE OF A UNION WHEN CONNECTINGBOTH WATER PIPES TO THE INLET ANDOUTLET CONNECTIONS IS RECOMMENDED,THIS WILL FACILITATE ANY NECESSARYSERVICING AND REQUIRED CLEANING OFTHE INLET WATER PARTICLE SCREEN.Although water piping throughout your structure may beother than copper, we recommend that copper pipingor suitably rated stainless steel flex line piping be usedfor at least three feet before and after the heater (followlocal codes if more stringent). Never sweat any rigidpiping directly to or beneath the water connections,damage can occur to the internal water valve fromheating of the pipe. Plastics or other PEX type plumbingline materials are not suitable for connecting directly tothe water heater. Keep water inlet and outlet pipes to noless than ¾" (19.05mm) diameter to allow the full flowcapacity.It is recommended that all water piping below theheater be properly insulated to avoid heat loss. Ifbelow freezing temperatures are ever anticipatedwhere the heater is located, insulation materialis required and must be capable of protecting thepiping from freezing. The freeze protection that isequipped within the heater will not prevent anyfreeze damage to the exterior water piping.If the cold and hot connections to the heater arereversed, the heater will not function. Be certain thereare no loose particles or dirt in the piping. Blow out orflush the lines before connecting to the water heater.Full port valves should be installed on both the coldwater supply and hot water outlet lines to facilitateservicing the heater (see Fig. 16). For installation on aprivate well system with the use of a pressure tank, thelowest pressure range setting recommended is 30-50psi (2.07 and 3.45bar).Connecting the pressure relief valve (PRV)A listed pressure relief valve supplied with the heatermust be installed at the time of installation. No valve isto be placed between the PRV and the heater. Noreducing coupling or other restriction may be installedin the discharge line. The discharge line must be aminimum of 4” above a drain and installed such that itallows complete drainage of both the PRV and the line.The location of the PRV must be readily accessible forservicing or replacement, and be mounted as close tothe water heater as possible. See Fig. 16. To install thePRV, a suitable fitting connected to an extension on a“T” fitting can be sweated to the hot water line.Support all piping.Fig. 16 Plumbing Connections and Pressure ReliefValveHOTCOLDINLET FILTERSCREEN