Bosch 2400 EO NG User Manual Download Page 22 | Manualshive

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6 720 607 440

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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

Fuse T 2,5A

14

Fuse T 3,15A

15

Terminal block

16

Ground post

17

Outlet water temperature sensor

18

Connector for Anti-freeze

19

Anti-freeze device (Heating resistors)

20

Temperature sensor

Fig. 30 Anti-freeze electrical scheme

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Summary of Contents for 2400 EO NG

Page 1: ...cause injury or property damage Refer to this manual For assistance or additional information consult a qualified installer service agency or the gas supplier In the Commonwealth of Massachusetts this product must be installed by a licensed plumber or gas fitter Upon completion of the installation these instructions should be handed to the user of the appliance for future reference What to do if y...

Page 2: ...enting For your safety Do not store or use gasoline or other flammable combustible or corrosive vapors and liquids in the vicinity of this or any other appliance Warning If the information in this manual is not followed exactly a fire or explosion may result causing property damage personal injury or death Warning Improper installation adjustment alteration service or maintenance can cause injury ...

Page 3: ... the gas supplier FCC This device complies with Part 15 of the FCC rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation Fig 1 Fig 2 Warning The heater must be disconnected from the gas supply piping system during any pressure testi...

Page 4: ...eless remote control accessory to operate with the appliance 2 2 250 SXO Specifications Technical data Approved in US Canada Capacity Maximum flow rate 6 35 GPM 24 l min at a 45 F 25 C rise Maximum output 142 968 Btu h 41 8 kW Maximum input 175 000 Btu h 51 2 kW Efficiency in Recovery efficiency 86 5 Min Output 31 131 Btu h 9 1 kW Temperature Control Selection range 100 F 38 C 140 F 60 C Default t...

Page 5: ...e See Fig 6 Installation manual Product registration card Do not lose this manual Please complete and return the enclosed product registration card Before installing the unit be certain you have the correct heater for your type of Gas Propane or Natural Gas Identification labels are found on the shipping box and on the rating plate which is located on the right side panel of the cover The 250SXO i...

Page 6: ...mum installation clearances Fig 3 Dimensions 1 Cover 2 On Off switch 3 Reset button 4 LCD display 5 Program button 6 Temperature buttons Fig 4 Minimum clearances Model 250 SXO TOP A 3 ft FRONT B 4 ft BACK 0 SIDES 4 ft BOTTOM C 1 ft Table 1 Minimum clearances ...

Page 7: ...hould be kept short to save energy Centrally locating the water heater is best It is always best to have the water lines insulated to prevent the possibility of any freeze damage B 3 The water in this heater is cold and always remains cold except for the times that hot water is being used The heater is equipped with freeze prevention equipment that will operate and prevent freezing of the water in...

Page 8: ...ful the washers on the screws are not lost see Fig 7 Fig 7 B Lift the top vent cap completely upward from the heater B From the bottom of the heater holding the sides lift the front cover panel of the heater upward and slightly toward you to remove Danger The top of the kit will get hot due to the flue gases Install away from children Ref Description Min distances A Directly below or from an openi...

Page 9: ...ng bracket will depend on what type of surface it s being mounted to Due to the varying types of building surfaces the installer must decide on how best to support and level the heater on an outside wall It is always recommended that horizontal or vertical support boards or plywood sheathing 1 2 minimum first be attached to the wall surface The heater must also be kept level on the wall surface Fi...

Page 10: ...ne B The use of a union when connecting gas pipe to the gas inlet connection is important this will facilitate any necessary servicing and cleaning of the inlet gas particle screen B The minimum diameter required for any appliance connector used is B National Fuel Gas Code requires that a sediment trap drip leg be installed on gas appliances not so equipped The drip leg must be accessible and not ...

Page 11: ...144 131 1 1 4 37 EHD 639 456 374 325 292 267 Length of Flexible Corrugated Stainless Steel Tubing CSST Feet Maximum Capacity of Semi Rigid copper Tubing in Thousands of BTU per Hour of Undiluted Liquefied Petroleum Gases at 11 inches Water Column Inlet Pressure Based on a Pressure Drop of 0 5 Inch Water Column Source National Fuel Gas Code NFPA 54 ANSI Z223 1 No Additional Allowance is necessary f...

Page 12: ...e program modes are for test purposes only and not intended for normal operation B Turn on high volume of hot water flow at least 6 gpm and heater will ignite B Record operating gas pressure reading in table 3 Gas pressures lower than 5 W C for Natural Gas or 11 W C for LPG will result in insufficient degree rise to the hot water being used and must be corrected See Gas Connections chapter 2 8 Fig...

Page 13: ...ated insulation material is required and must be capable of protecting the piping from freezing The freeze protection that is equipped within the heater will not prevent any freeze damage to the exterior water piping If the cold and hot connections to the heater are reversed the heater will not function Be certain there are no loose particles or dirt in the piping Blow out or flush the lines befor...

Page 14: ...rounded and that the installation meets all electrical codes Outdoor electrical outlets have special requirements Warning For safety reasons disconnect the power supply to the heater before any service or testing is performed Warning This heater must be electrically grounded in accordance with the most recent edition of the National Electrical Code NFPA 70 In Canada all electrical wiring to the he...

Page 15: ...e If you do not smell gas go to the next step B 3 This appliance is equipped with electronic ignition for lighting the main burners When turning the heater on follow these instructions exactly B 4 Set the ON OFF switch to the ON position turn to the right position B 5 Open a hot water tap B 6 The burners will remain on until the hot water tap is turned off When the heater is in operation you will ...

Page 16: ...ature selection To select water temperature outlet B Press buttons and in order to reach requested temperature Fig 21 If the outlet water temperature is set too high the heater can produce temperatures that are too hot A temperature balance shower valve can automatically mix in cold water to reduce such hot water temperature In the event of any temperature instability with the use of a temperature...

Page 17: ...oming and outgoing water temperatures Fig 22 Flow temperature charts Hot Water Flow and Temperature with Various Inlet Temperature lpm Celsius 0 00 4 00 8 00 12 00 16 00 20 00 24 00 35 40 45 50 55 60 65 Hot water temperature ºC Hot Water Flow l min Inlet ºC 4 Inlet ºC 10 Inlet ºC 16 Inlet ºC 21 Hot Water Flow and Temperature with Various Inlet Temperature gpm Fahrenheit 0 00 1 00 2 00 3 00 4 00 5 ...

Page 18: ... If the problem persists contact your installer 3 6 Program button Program button can be used programmed in the appliance and in the remote control Programming Program function Programming actions are similar for both controls appliance control pad and wireless remote control Fig 27 Program key B Press buttons and to select temperature to be memorized B Hold Program button for 3 seconds to save te...

Page 19: ...nlet connection is plumbed to the right side of heater when facing unit Water flow rate at hot water tap is too low A minimum of 0 8 gallon minute 3 l m is required to activate the heater Cold water inlet filter screen is dirty Remove water inlet filter screen and clean The screen is located at the inlet connection to the water heater disconnecting the main cold supply line at the heater is requir...

Page 20: ...o HOT WATER TEMPERATURE FLUCTUATES UNIT DEACTIVATED Unbalanced pressure in water lines Any restriction caused by the water heater in the hot water system can result in uneven pressures between the cold and the hot In such cases when mixing cold water at the tap manually or automatically through a mix type shower valve the lower hot water pressure may be overpowered by the higher cold water pressur...

Page 21: ...d connections Check incoming water temperature to heater it must be above 32 F 0 C A9 flashing Hot water temperature sensor receiver mis assembled from control unit Note if display shows A9 flashing the appliance can be operated normally but performance may be affected Check that the water temperature sensor receiver is properly assembled on the horizontal of the hot water pipe Check that the wate...

Page 22: ...r 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 Fuse T 2 5A 14 Fuse T 3 15A 15 Terminal block 16 Ground post 17 Outlet water temperature sensor 18 Connector for Anti freeze 19 Anti freeze device Heating resistors 20 Temperature sensor Fig 30 Anti freeze electrical scheme ...

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

Page 24: ... 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 window 11 Inlet air duct 12 Control unit 13 Exhaust fan 14 Water valve 15 Gas valve Fig 33 Appliance overview ...

Page 25: ...6 720 607 440 Interior components diagram and parts list 25 8 2 Components diagram Fig 34 Components Diagram ...

Page 26: ...et 8 704 701 050 17 Set of electrodes 8 708 107 020 18 Exhaust Fan 8 707 204 039 19 Gas Air Mixer 8 705 700 115 20 Mixer Fan gasket 8 704 701 059 21 Gas valve washer 8 704 701 062 22 Gas valve 8 707 021 019 23 Gas valve washer 8 700 103 014 24 Remote control 8 707 207 153 25 Control unit 8 707 207 133 26 Ignition cable 8 704 401 220 27 Cables 24V 8 704 401 214 28 Cables 8 704 401 239 29 Power supp...

Page 27: ...o high fire and the flow should increase B Record the CO2 reading in P1 on the next page P2 CO2 Reading CO2 P1 CO2 Reading CO2 Compare your readings to those found in table 1 under the With Front Cover column If CO2 readings are off make adjustments as outlined below Note The Without Front Cover column gives approximate values with the cover off to ease the adjustment process Final readings should...

Page 28: ...he OFF O position and then back to the ON I position 5 Heater is ready for normal operation Final Readings P2 CO2 Reading CO2 P1 CO2 Reading CO2 Fig 37 Fig 38 Without Front Cover With Front Cover Nat Gas Nat Gas max input P1 9 1 0 1 9 7 0 1 min input P2 9 4 0 1 9 7 0 1 LP Gas LP Gas max input P1 10 1 0 1 10 7 0 1 min input P2 10 4 0 1 10 7 0 1 Final reading must be confirmed with the front cover o...

Page 29: ...w limiters They will give you the same comfort level while saving water B Define the temperature you want in the appliance or with the remote control This way you have the precise water flow needed mixing cold water to regulate temperature will increase the water flow with consequent waste of water For increased safety shut off the appliance from the main water supply if your are staying away from...

Page 30: ...lacement part s CEC will provide ground service delivery for these parts Expedited or upgraded shipping will be charged to the customer Service Labor Costs This warranty does not cover any labor costs associated with service removal or re installation of part s All such costs must be borne by the Purchaser Additionally this warranty does not cover any labor costs associated with service removal or...

Page 31: ...inter Temperature __________ Average S ummer Temperature __________ Installing C ompany _____________________________________________ Installer name _____________________________________________ Address _____________________________________________ Phone _____________________________________________ S ee C hapter 3 6 and gas pressure table to be filled out by installer Installation manual should b...

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