Manuals / Bosch Appliances / Household Appliance / Water Heater

Bosch Appliances 250SX NG Electrical diagram, Intlet water temperature sensor 2 Ionization sensor

Models: 250SX NG 250SX LP

1 36

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Electrical diagram

6Electrical diagram

Fig. 36 Electrical scheme

1Intlet water temperature sensor

2 Ionization sensor

3 Water flow sensor

4 Over heat protection

5 Temperature limiter

6 Gas valve

7Fan

8Water valve

9 AC Plug

10 Ignition electrode

11 Display PCB

12 ON/OFF switch

13 Fuse T 2,5A

14 Fuse T 3,15A

15 Terminal block

16 Ground post

17 Outlet water temperature sensor

6 720 607 057

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Image 27

Bosch Appliances 250SX NG, 250SX LP Electrical diagram, Intlet water temperature sensor 2 Ionization sensor, 6 720 607

Contents

Intended for variable flow applications with multiple tapping points Temperature Modulated with Electronic IgnitionMODEL 250SX NG and 250SX LP 250 SX NG 250 SX LPWarning If Index23 For your safety IndexClose gas valve. Open windows 2.1 Features 2.2 250 SX Specifications Technical data2 Appliance details Minimum recommended water pressure 30 PSI 2.07 bar Connections Table 1 Minimum clearances 2.3 Dimensions and Minimum installation clearancesFig. 5 Dimensions Fig. 6 Minimum clearances2.4 General rules to follow for safe operation 2.5 Proper location for installing your heater2.7 Mounting installation 2.6 Clearances2.8 Combustion air requirements 2.9 Venting The maximum flue gas exhaust temperature on the 250 SX is 437F 225C B Attach the flue gas exhaust accessory 8 705 Room sealed installation TWIN PIPE SYSTEM Open combustion installation SINGLE PIPE SYSTEMAppliance details Appliance details Recommended exhaust vent terminator position DescriptionMinimum distance The venting materials and accessories shown Vertical venting installation - Masonry2.10 Gas piping & connections Chimney combustion air piping not beingexample ¾” B.I. Natural Gas pipe for 20 ft 6.1m refer to applicable chart belowFOR NATURAL GAS Follow boxed numbers for piping just one 250 SX2.12 Measuring gas pressure 2.11 Gas line sizing2.13 Water connections 2.17 Lighting and operating instructions 2.16 For your safety read before operating your water heater2.14 Electrical connections 2.15 Operating instructionsNOTE on a first time initial instal 3.1 Power 3.2 Temperature selection3 Operation instructions Hot Water Flow GPM Fig. 29 Flow/temperature chartsHot water temperature ºF Hot water temperature ºC3.6 Program button 3.3 Use of remote control accessory3.5 Reset button 3.4 Operation5 Troubleshooting 4 Maintenance and servicePage chapter By installer or service technician only11 Display PCB 12 ON/OFF switch 13 Fuse T 2,5A 14 Fuse T 3,15A 6 Electrical diagram1 Intlet water temperature sensor 2 Ionization sensor 3 Water flow sensor 4 Over heat protection 5 Temperature limiter7 250 SX Functional scheme 250 SX Functional scheme6 720 607 6 Temperature switches 7 Flue gas collector 8 Mixer 9 Heat exchanger 8 Interior components diagram and parts list8.1 Interior components 1 Cover 2 On/Off switch 3 Reset button 4 LCD display 5 Program button8.2 Components diagram Fig. 40 Components Diagram6 720 607 Reference 8.3 Parts listInterior components diagram and parts list Description9.1 Adjusting the unit 9 Special adjustment for measuring and adjusting CO2 levelsFig. 43 Adjusting clockwise6 720 607 10 Protecting the environment How to Make a Claim 11 Twelve Year Limited WarrantyTwelve Year Limited Warranty Service Labor Coststechsupport@controlledenergy.com Recycled paper Replacement Parts available from North American DistributorCONTROLLED ENERGY CORP 340 Mad River Park Waitsfield, Vermont Phone Fax 802