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Bosch Appliances 250 SXO NG Electrical diagram, Electrical scheme, Anti-freeze electrical scheme

Models: 250 SXO LP 250 SXO NG

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6Electrical diagram

Electrical diagram

6Electrical diagram

Fig. 29 Electrical scheme

1Intlet water temperature sensor

2 Ionization sensor

3Water flow sensor

4	Over heat protection
5	Temperature limiter
6	Gas valve
7	Fan
8	Water valve

9AC Plug

10 Ignition electrode

11 Display PCB

12ON/OFF switch

13 Fuse T 2,5A

14Fuse T 3,15A

15 Terminal block

16 Ground post

17Outlet water temperature sensor

18 Connector for Anti-freeze

19Anti-freeze device (Heating resistors)

20 Temperature sensor

Fig. 30 Anti-freeze electrical scheme

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Image 22

Bosch Appliances 250 SXO NG manual Electrical diagram, Electrical scheme, Anti-freeze electrical scheme, Water flow sensor

Contents

For exterior use only Electronic Ignition and built in Freeze protection250 SXO NG - Natural Gas 250 SXO LP - Liquefied Petroleum LP Gas MODEL 250SXO - OUTDOOR MODELIndex What to do if you smell gas Close gas valve 2.2 250 SXO Specifications Technical data 2.1 Features2 Appliance details Natural Gas. LP Gas Fig. 4 Minimum clearances 2.3 Dimensions and Minimum installation clearancesFig. 3 Dimensions Table 1 Minimum clearances2.5 Proper location for installing your heater 2.4 General rules to follow for safe operationTable 2 Clearances 2.6 Heater Placement and Clearances2.7 Mounting installation Fig. 6 Remove front coverB After inspection, replace front cover and tighten screws, then replace plastic decal shields 2.8 Gas piping & connections FOR LP GAS Appliance details FOR NATURAL GAS2.9 Measuring gas pressure Fig. 14 Gas pressure measuring left tappingFig. 16 Plumbing Connections and Pressure Relief 2.10 Water connectionsValve 2.12 Operating instructions 2.11 Electrical connectionsAppliance electrical power supply 2.14 Lighting and operating instructions 2.13 For your safety read before operating your water heaterNOTE on a first time initial 3.2 Temperature selection 3.1 Power3 Operation instructions Fig. 22 Flow/temperature charts Operation instructions Setting the water temperatureFig. 23 Remote control 3.3 Use of remote control accessory3.5 Reset button Fig. 26 Reset button4 Maintenance and service 5 TroubleshootingTest by following 4th bullet under BURNERS DO NOT IGNITE WHEN HOT WATER IS TURNED ON By installer or service technician only Fig. 30 Anti-freeze electrical scheme 6 Electrical diagramFig. 29 Electrical scheme 1 Intlet water temperature sensor 2 Ionization sensorFig. 31 Functional scheme 7 250 SXO Functional scheme250 SXO Functional scheme Fig. 33 Appliance overview 8 Interior components diagram and parts list8.1 Interior components On/Off switch8.2 Components diagram Fig. 34 Components DiagramDescription 8.3 Parts listInterior components diagram and parts list Reference9 Special adjustment for measuring and adjusting CO2 levels Special adjustment for measuring and adjusting CO2 levels 10 Protecting the environment 11 Twelve Year Limited Warranty S erial Number