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MODEL 250SX NG and 250SX LP - INDOOR MODEL

MODEL 250SX NG and 250SX LP - INDOOR MODEL . Temperature Modulated with Electronic Ignition Suitable for heating potable water only Not approved for space heating purposes (Intended for variable flow applications). 250 SX NG - Natural Gas 250 SX LP - Liquefied Petroleum (LP) Gas Warning: If the information in this manual is not What to do if you smell gas followed exactly, a fire or explosion may result Close gas valve. Open windows. causing property damage, personal injury or death. Do not store or use gasoline or other flammable Do not try to light any appliance. vapor and liquids in the vicinity of this or any other Do not touch any electrical switch; do not use any appliance. phone in your building. If you cannot reach your gas supplier, call the fire Improper installation, adjustment, alteration, department. service or maintenance can cause injury or property damage. Refer to this manual.

MODEL 250SX NG and 250SX LP - INDOOR MODEL Temperature Modulated with Electronic Ignition Suitable for heating potable water only Not approved for …

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Transcription of MODEL 250SX NG and 250SX LP - INDOOR MODEL

1 MODEL 250SX NG and 250SX LP - INDOOR MODEL . Temperature Modulated with Electronic Ignition Suitable for heating potable water only Not approved for space heating purposes (Intended for variable flow applications). 250 SX NG - Natural Gas 250 SX LP - Liquefied Petroleum (LP) Gas Warning: If the information in this manual is not What to do if you smell gas followed exactly, a fire or explosion may result Close gas valve. Open windows. causing property damage, personal injury or death. Do not store or use gasoline or other flammable Do not try to light any appliance. vapor and liquids in the vicinity of this or any other Do not touch any electrical switch; do not use any appliance. phone in your building. If you cannot reach your gas supplier, call the fire Improper installation, adjustment, alteration, department. service or maintenance can cause injury or property damage. Refer to this manual.

2 For Immediately call your gas supplier from a neighbor's assistance or additional information consult a phone. Follow the gas supplier's instructions qualified installer, service agency or the gas Installation and service must be performed by a 6 720 607 057 US ( ) AL. supplier. 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. Index Index 1 Warning 2. 1 Warning Warning: If the information in this 2 Appliance details 4 manual is not followed exactly, a fire or Features 4. 250 SX Specifications (Technical data) 4. explosion may result causing property Dimensions and Minimum installation clearances 6 damage, personal injury or death. General rules to follow for safe operation 7.

3 Proper location for installing your heater 7. Clearances 8 Warning: Improper installation, Mounting installation 8 adjustment, alteration, service or Combustion air requirements 8 maintenance can cause injury or Venting 9. property damage. Refer to this manual. Venting options 12. Gas piping & connections 15 For assistance or additional information Gas line sizing 17 consult a qualified installer, service Measuring gas pressure 17 agency or the gas supplier. Connecting Manometer 17 Upon completion of the installation, Static Pressure Test 17. these instructions should be handed to Operating Pressure Test 17. Water connections 18 the user of the appliance for future Electrical connections 19 reference. Operating instructions 19. For your safety read before operating your water heater 19 Featuring Lighting and operating instructions 19. Electronic Ignition and Power Venting 3 Operation instructions 21 For your safety Power 21 Do not store or use gasoline or other flammable, Temperature selection 21.

4 Use of remote control accessory 23. combustible or corrosive vapors and liquids in the Operation 23 vicinity of this or any other appliance. Reset button 23. Program button 23 Warning: Carefully plan where you Locked condition 23 install the heater. Correct combustion air supply and flue pipe installation are 4 Maintenance and service 24 very important. If a gas appliance is not installed correctly, fatal accidents can result from lack of air, carbon monoxide 5 Troubleshooting 24. poisoning or fire. 6 Electrical diagram 27. Warning: Exhaust gas must be vented to outside using proper vent material 7 250 SX Functional scheme 28 suitable for category III vent systems and temperatures up to 480 F. Vent 8 Interior components diagram and parts list 29 and combustion air connector piping Interior components 29 must be sealed gas-tight to prevent Components diagram 30 possibility of flue gas spillage, carbon Parts list 31.

5 Monoxide emissions and risk of fire, resulting in severe personal injury or 9 Special adjustment for measuring and adjusting CO2 death. levels 32. Warning: Place the heater in a location 10 Protecting the environment 34. where water leaks will do NO DAMAGE. to adjacent areas or lower floors. 11 Twelve Year Limited Warranty 35. 2 6 720 607 057. Warning Warning: Field wiring connections and electrical grounding must comply with local codes, or in the absence of local codes, with the latest edition of the National Electric Code, ANSI/NFPA 70, or in Canada, all electrical wiring must comply with the local codes and the Canadian Electrical Code, CSA Part 1. Warning: Shock hazard line voltage is present. Before servicing the water heater, turn off the electrical power to the water heater at the main disconnect or circuit breaker. Failure to do so could result in severe personal injury or death.

6 What to do if you smell gas Close gas valve. Open windows. Do not try to light any appliance. Do not touch any electrical switch; do not use any phone in your building. Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions. If you cannot reach your gas supplier, call the fire department. Fig. 1. Installation and service must be performed by a qualified installer, service agency or the gas supplier. Warning: The heater must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures equal to or more than psig. 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. Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

7 Fig. 2. 6 720 607 057 3. Appliance details 2 Appliance details Features 250 SX Specifications (Technical Parts data). Touch Pad interface control Approved in US/Canada High power pre-mix compact burner with low Nox Capacity emissions Maximum flow rate: GPM (24 l/min) at a 45 F. Modulating Gas Valve with constant gas:air ratio (25 C) rise. control Maximum output Modulating water valve for improved comfort and temperature control. 142,968 Btu/h ( kW). Safety Maximum input Flame sensor (ionization) rod 175,000 Btu/h ( kW). Overheat sensor Efficiency in %. Temperature limiter Recovery efficiency Fan speed monitoring. Min. Output High Quality Materials for Long Working Life 31,131 Btu/h ( kW). Copper heat exchanger Temperature Control High efficiency Ceramat Burner Selection range: 100 F (38 C) - 140 F (60 C). Compact space saver: mounts on a wall with a Default temperature: 122 F (50 C). supplied bracket.

8 Stability: +/- 2 F (+/- 1 C). Easily removable one-piece cover. Features Gas Requirement Gas connection (inches) - . LCD Display On/Off and Temperature control switches Inlet gas pressure under operation (with a high hot water flow rate)*. Reset button Propane: 11 - 14 water column Program Key (Selectable temperature default). Natural Gas: 5 - 14 water column. Failure codes for easy diagnostic and repair. * To measure Gas Pressure, see Measuring Gas Accessories Pressure, chapter Optional wireless remote control accessory to Venting operate with the appliance A condensate trap is integrated into the exhaust flue Vent termination kit. gas collar of the heater, the supplied condensate drain tube must be installed to it for proper removal of BOSCH is constantly improving its condensate from the trap. See chapter for Venting i products, therefore specifications are subject to change without prior notice.

9 On page 9. Water Hot water connection (inches) - . Cold water connection (inches) - . Water valve material: Polymer (PPS) (Polypropylene Sulfid). Minimum water flow: gallon/minute (3 l/m). Minimum recommended water pressure: 30 PSI. ( bar). Connections: Bottom of heater 4 6 720 607 057. Appliance details Combustion Do not lose this manual. Please complete and return NOx 55 ppm the enclosed product registration card. Before installing the unit, be certain you have the CO 250 ppm correct heater for your type of Gas - Propane or CO2 level set from factory, see chapter 9. Natural Gas. Identification labels are found on the shipping box, and on the rating plate which is located on Dimensions the right side panel of the cover. Depth (in): 8 (220 mm). To remove front cover Width (in): 15 (400 mm). Loosen the two Philips head screws located on front Height (in): 23 (600 mm). panel (beneath plastic decal shields if they are Weight: 47 pounds (21 kg).)

10 Already attached, see Fig. 3). Gas types Lift front cover panel upward and remove. Natural Gas. LP Gas. Converting the gas type can only be done by a certified gas technician with a calibrated CO2 analyzer. Call BBTNA for conversion instructions. Plastic decals Voltage 120 V AC (50/60 Hz). Amperage IDLE - 40 mA. Operation - 2,5 A. Noise 50 db (A). Safety devices Flame failure device (ionization flame rod sensor). Fig. 3 Remove front cover Pressure relief valve (supplied with heater). The 250 SX is not approved or designed for: Over heat prevention (temperature limiter). Manufactured (mobile) homes, RV's or boats Water resistant Heating or other recirculating/pumping applications*. IP X4 (protection against water drops). Outdoor installation (use only Outdoor MODEL 250. UNPACKING THE 250 SX HEATER SXO). This heater is packed securely. Solar/preheat backup or high temperature booster The box includes: use.


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