Bosch 250 SXO LP - Manuals

6 720 607 440 Appliance details 7 2.4 General rules to follow for safe operation B 1. You should follow these instructions when you install your heater. In the United States: Theinstallation must conform with local codes or, in theabsence of local codes, the National Fuel Gas CodeANSI Z223.1/NFPA 54...

6 720 607 440 8 Appliance details 2.6 Heater Placement and Clearances The 250 SXO is design certified for installation directlyon a combustible wall. (see 2.7 Mounting installation)For installation on vinyl siding see Fig. 10. Keep the areabelow the heater free of combustible material. Minimum clear...

6 720 607 440 Appliance details 9 B After inspection, replace front cover and tightenscrews, then replace plastic decal shields. B Fix the top vent cap on the top of the heater, asshown in Fig. 8). Make sure the vent cap is well fittedby taking special care that the front cover stays insidethe exten...

6 720 607 440 10 Appliance details 2.8 Gas piping & connections Before connecting the gas supply, check the ratingplate on the right side of the heater to be sure that theheater is rated for the same gas to which it will beconnected.In the United States: The installation must conform withlocal c...

6 720 607 440 Appliance details 11 FOR NATURAL GAS Maximum Capacity of pipe in Cubic Feet of Gas per Hour for Gas Pressure of 0.5 Psig or less and a Pressure dropof 0.3 in Water Column (0.75mbar).(Based on a 0.60 Specific Gravity Gas) Btu numbers given in thousands. Fig. 12 Follow boxed numbers for ...

6 720 607 440 12 Appliance details 2.9 Measuring gas pressure 2.9.1 Connecting Manometer B Shut off gas. B Remove front cover and locate inlet gas pressuremeasuring point (see Fig. 14). B Loosen screw inside test point fitting (do not remove)and connect manometer tube on test point. 2.9.2 Static Pre...

6 720 607 440 Appliance details 13 2.10 Water connections When facing the heater, the ¾” cold water inlet is on the bottom right and the hot water outlet is on the bottom left. Install the heater where it’s centrally close to hot water use points if possible, and make hot water piping runs as short ...

6 720 607 440 14 Appliance details 2.11 Electrical connections The 250 SXO requires an electrical power supply froma 120VAC 60Hz circuit and must be properlygrounded.A means for switching off the 120VAC power supplymust be provided.The heater is wired as shown in the wiring diagram(chapter 6, Fig. 2...

6 720 607 440 Appliance details 15 2.13 For your safety read before operating your water heater A. This appliance is equipped with electronic ignition for lighting the main burners. When turning the heater on,follow these instructions exactly. B. Before operating the unit, turn the On/Off switch to ...

6 720 607 440 16 Operation instructions 3 Operation instructions Fig. 19 1 On/Off switch 2 Reset button 3 Program button 4 Increasing temperature button 5 Decreasing temperature button 6 LCD display 3.1 Power On B To start the appliance switch the button to the ONposition (turn to the right position...

6 720 607 440 18 Operation instructions 3.3 Use of remote control accessory Fig. 23 Remote control The wireless remote control accessory and thetemperature selector buttons on the front of the waterheater operate identically. Contact your distributor orCEC to order if the remote control accessory is...

6 720 607 440 Maintenance and service 19 4 Maintenance and service The unit should be checked once a year by a gastechnician. If repairs are needed, the repairs should bedone by a gas technician To remove front cover B See instructions to remove front cover on page 8. Systems and parts that should b...

6 720 607 440 Troubleshooting 21 Display Cause Solution E9 Temperature limiter opened circuit (overheat). Trips at 220F (104C). Check connections. *Check heat exchanger condition.* EA No ionization during safety time (safety time out).Note: appliance makes 3 ignition attempts before entering error m...

6 720 607 440 22 Electrical diagram 6 Electrical diagram Fig. 29 Electrical scheme 1 Intlet water temperature sensor 2 Ionization sensor 3 Water flow sensor 4 Over heat protection 5 Temperature limiter 6 Gas valve 7 Fan 8 Water valve 9 AC Plug 10 Ignition electrode 11 Display PCB 12 ON/OFF switch 13...

6 720 607 440 250 SXO Functional scheme 23 7 250 SXO Functional scheme Fig. 31 Functional scheme

6 720 607 440 24 Interior components diagram and parts list 8 Interior components diagram and parts list 8.1 Interior components Fig. 32 Components 1 Cover 2 On/Off switch 3 Reset button 4 LCD display 5 Program button 6 Temperature buttons 7 Flue gas collector 8 Mixer 9 Heat exchanger 10 Observation...

6 720 607 440 Interior components diagram and parts list 25 8.2 Components diagram Fig. 34 Components Diagram

6 720 607 440 26 Interior components diagram and parts list 8.3 Parts list Item Description Reference 1 Front cover 8 705 421 915 2 Shield 8 705 506 753 3 Heat exchanger 8 705 406 285 4 Heat exchanger top gasket 8 704 701 052 5 Clip 8 716 102 607 6 Heat exchanger bottom gasket 8 704 701 054 7 O-ring...

6 720 607 440 28 Special adjustment for measuring and adjusting CO2 levels D. Returning to Service: 1. Return slotted cover to original position.2. Reinstall Torx cover.3. Remove CO 2 analyzer probe and reinstall plug in exhaust collar.4. Turn ON/OFF switch to the OFF (O) position andthen back to th...

6 720 607 440 Protecting the environment 29 10 Protecting the environment Packing The packing box may be fully recycled as confirmed bythe recycling symbol . Components Many parts in the heater can be fully recycled in the endof the product life. Contact your city authorities forinformation about th...

6 720 607 440 30 Twelve Year Limited Warranty 11 Twelve Year Limited Warranty General Aquastar water heaters are warranted by theManufacturer (BOSCH) through Controlled EnergyCorp. Controlled Energy Corp. (CEC) will furnish areplacement heat exchanger and will furnish areplacement of any other part ...