Bosch C 1050 Manual
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C 1050 ES INDOOR MODEL Temperature Modulated with Electronic Ignition Suitable for heating potable water and space heating (Intended for variable flow applications) C 1050 ES - Natural Gas C 1050 ES - Liquefied Petroleum (LP) Gas 6 720 644 894 (2010/09) US Warning: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any o ther appliance. Improper installation, adjustment, alteration, service or maintenance can 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 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 fi re department. • Installation and service must be performed by a qualified installer, service agency or the gas supp lier.
6 720 644 8942 Index Index 1 Warning 3 2 Appliance details 5 2.1 Features 5 2.2 Specifications (Technical data) 5 2.3 Unpacking the heater 6 2.4 General rules to follow for safe operation 8 2.5 Dimensions and minimum installation clearances 9 3 Installation instructions 10 3.1 Specialized tools 10 3.2 Introduction 10 3.3 Venting 10 3.4 Combustion air requirements 24 3.5 Proper location for installing your heater 25 3.6 Heater placement and clearances 25 3.7 Mounting installation 25 3.8 Gas piping & connections 26 3.9 Water connections 29 3.10 Water quality 29 3.11 Filling the condensate trap 31 3.12 Domestic hot water recirculation 32 3.13 Space heating applications 33 3.14 Measuring gas pressure 35 4 Electrical connections 36 4.1 Electrical power supply 36 4.2 Position of the fuses in control unit 36 5 Operation instructions 37 5.1 Description LCD Display 37 5.2 For your safety read before operating your water heater 38 5.3 Power 38 5.4 Temperature selection 38 5.5 Use of optional remote control accessory (part no. TSTAT2) 39 5.6 Operation 39 5.7 Reset button 39 5.8 Program button 40 5.9 Locked condition 40 6 Maintenance and service 41 6.1 Annual maintenance 41 6.2 Winterizing for seasonal use 41 6.3 Mineral scale build-up 42 6.4 Condensing heat exchanger unit 42 6.5 Adjusting CO2 43 6.6 Program values 45 6.7 Control board diagnostics 46 7 Troubleshooting 47 7.1 Introduction 47 7.2 Burner does not ignite when hot water is turned ON 47 7.3 Water is too hot 47 7.4 Water is not hot enough 47 7.5 Low water flow/pressure 48 7.6 Hot water temperature fluctuates at tap 48 7.7 Noisy burner/heater during operation 48 8 Problem solving 49 8.1 Error code diagnostics 49 9 Electrical diagram 53 10 Sensor resistance charts 54 11 Functional scheme 56 12 Interior components diagram and parts list 57 12.1 Interior components 57 12.2 Components diagram 59 13 Protecting the environment 66 14 Limited Warranty 67
6 720 644 894 Warning3 1 Warning 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: Carefully plan where you install the heater. Correct combustion air supply and flue pipe installation are very important. If a gas appliance is not installed correctly, fatal accidents can result such as carbon monoxide poisoning or fire. Warning: Exhaust gas must be vented to outside using approved vent material See table 2, page 10 (For Canada use only ULCS636 approved material). Vent and combustion air connector piping must be sealed gas-tight to prevent possibility of flue gas spillage, carbon monoxide emissions and risk of fire, resulting in severe personal injury or death. Approved vent terminators must be used when penetrating to the outside. Warning: Place the heater in a location where water leaks will do NO DAMAGE to adjacent areas or lower floors. 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 C22.1 Part 1. Warning: Shock hazard: line voltage is present. Before servicing the water heater, unplug power supply cord from outlet. Failure to do so could result in severe personal injury or death. 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 0.5 psig. Warning: The appliance should be located in an area where leakage of the heater or connections will not result in damage to the area adjacent to the appliance or to lower floors of the structure. When such locations cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be installed under the appliance. The pan must not restrict combustion air flow. Warning: The maximum inlet gas pressure must not exceed the value specified by the manufacturer and the minimum value listed is for the purpose of input adjustment. Warning: If a water heater is installed in a closed water supply system, such as one having a backflow preventer in the cold water supply line, means shall be provided to control thermal expansion. Contact the water supplier or local plumbing inspector on how to control this situation. Warning: Keeping appliance area clear and free from combustible materials, gasoline and other flammable vapors and liquids. Warning: Do not obstruct the flow of combustion and ventilation air. Warning: Precautions must be taken prior to manually operating the relief valve to avoid contact with hot water coming out of the relief valve and to prevent water damage. Caution: Label all wires prior to disconnection when servicing controls. Wiring errors can result in improper and dangerous operation. Verify proper operation after servicing.
6 720 644 8944 Warning FCC: This device complies with Part 15 of the FCC rules. Operation is subject to the following two condition s: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired ope ra- tion. Fig. 1 Warning: If a relief valve discharges periodically, this may be due to thermal expansion in a closed water supply system. Contact the water supplier or local plumbing inspector on how to correct this situation. Do not plug the relief valve. Warning: If the water heater is used in a space heating application, all piping and components connected to the water heater must be suitable for use with potable water. Warning: Toxic chemicals, such such as those used for boiler treatment, shall not be introduced into the potable water used for space heating. Warning: A water heater which will be used to supply potable water shall not be connected to any heating system or component(s) previously used with a nonpotable water heating appliance. HOT BURN D A N G E R Watertemperatureover125°Fcan causesevereburnsinstantlyordeathfromscalds. Children,disabledandelderlyare athighestriskofbeingscalded. Seeinstructionmanualbefore settingtemperatureatwater heater. Feelwaterbeforebathingor showering. 6720608643-16.1AL
6 720 644 894 Appliance details5 2 Appliance details 2.1 Features Parts • Key Pad interface control • High power pre-mix compact burner with low NOxemissions • Modulating Gas Valve with constant gas:air ratio control • Modulating water valve for improved comfort and temperature control. High quality materials for long working life • Copper heat exchanger • High efficiency Ceramat Burner • Compact space saver: mounts on a wall with a supplied bracket. Features • Easily removable one-piece cover • LCD Display with backlight • On/Off and Temperature control switches • Reset button • Program button (Selectable temperature default) • Failure codes for easy diagnostics and repair • Real-time diagnostics for troubleshooting/informa- tional purposes • Built in freeze prevention. Note: The freeze prevention kit is designed to provide protection for the water heater down to approximate ly 5°F for short term conditions only. It will not pro tect the appliance in areas where the temperature is routine ly expected to be below freezing. - The freeze prevention kit will not protect plumbi ng out- side the appliance from freezing. Precautions shoul d be taken. Accessories (Bosch part #) • Optional wireless remote control to operate with t he appliance (TSTAT2) • Cascading kit (77090003962) • Outdoor kit (BTOK) • External water filter (part # 8 703 305 356) • Concentric termination kit (196016) • Exhaust/Intake bird screen (L2594) • Condensate drain tee (196061) [included with Con- centric termination kit] • Pipe Cover (PTPCES) • High temperature kit (7736500074) • Recess box kit (7736500043) • Pressure relief valve (FWL-2). 2.2 Specifications (Technical data) Approved in US/Canada Capacity Maximum flow rate: 8.0 GPM (30 l/min) at a 45°F (25°C) rise. Maximum output 179,300 Btu/h (52.5 kW) Maximum input 199,000 Btu/h (58.3 kW) Efficiency in % Thermal efficiency > 92% Minimum Input 19,900 Btu/h (5.8 kW) Temperature Control Selection range: 100°F (38°C) - 140°F (60°C) Default temperature: 122°F (50°C) Stability: +/- 2°F (+/- 1°C) Gas Requirement Gas connection (inches) - ¾” Inlet gas pressure under operation (with a high hot water flow rate)* • Propane: 8” - 13” water column • Natural Gas: 3.5” - 10.5” water column. * To measure Gas Pressure, see Measuring Gas Pressure, chapter 3.14, page 35. Water • Hot water connection (inches) - ¾” • Cold water connection (inches) - ¾” • Water valve material: Polymer (PPS) (Polypropylene Sulfid) • Minimum water flow: 0.5 gallon/minute (1.9 l/m) Note: Activation varies with inlet water temperatur es from 0.5 - 1.6 gallon/minute (1.9 - 6.1 l/m). • Minimum recommended water pressure: 30 PSI (2.07 bar) • Minimum well pressure 40 psi, see page 29. • Connections: – Bottom of heater i BOSCH is constantly improving its products, therefore specifications are subject to change without prior notice.
6 720 644 8946 Appliance details Combustion • NOx 14 Ng/J (Nanograms of NOx (calculated as NO 2) per Joule of heat output). • CO 290 ppm (measured) • CO 2 level set from factory, see chapter 6.5, page 43. Dimensions • Depth (in): 11¼” (286 mm) • Width (in): 17 7/8” (452 mm) • Height (in): 30½” (775 mm) • Weight: 74 pounds (33.5 kg). Gas types Natural Gas. LP Gas. Voltage 120 V AC (60 Hz) nominal Amperage Idle - 40 mA Operation - 2.5 A Noise 45 - 65 db (A) Safety devices • Flame failure device (ionization flame rod sensor) • Overheat prevention (temperature limiter) • Inlet temperature sensor • Outlet temperature sensor • Back flow temperature sensor • Exhaust gas temperature sensor. Water protection IP X4 (protection against water drops) 2.3 Unpacking the heater 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 loca ted on the right side panel of the cover. Fig. 2 Rating plate A Serial number B Type of gas The box includes: • C 1050 ES • Bracket for wall hanging the heater • Exhaust vent adaptor (with 4 screws and gasket provided) • Combustion air inlet adaptor (with 3 screws and ga s- ket provided) • Installation manual (manual can be downloaded at www.boschpro.com) • Product registration card • Energy Guide label. Please complete and return the enclosed product registration card. The C 1050 ES is not approved or designed for: • Manufactured (mobile) homes, boats or any mobile installation. (Modular homes are acceptable for installation). • Use above 8000 ft A.S.L. altitude (see page 21 ). • Outdoor installation without installation of Outdoor kit (BTOK). • Applications where inlet water temperature is higher than 140 °F (60 °C). A 3-way valve or mixing valve must be installed before the appliance if inlet water temperature exceeds this limit . i If appliance is installed at elevations above 2000ft, refer to Section 3.3.7 Fan speed adjustment.
6 720 644 894 Appliance details7 To remove front cover B Loosen the two Phillips head screws located on bottom rear of cover (see Fig. 3). Fig. 3 Loosen the two screws B Lift front cover panel upward and remove. Fig. 4 Remove the front cover To remove combustion cover (service only) B Open the four clips and remove the combustion cover (see Fig. 5). Fig. 5 Remove the combustion cover 6720644956-11.1V
6 720 644 8948 Appliance details 2.4 General rules to follow for safe operation B1. You must follow these instructions when you install your heater. In the United States: The installation must conform with local codes or, in t he absence of local codes, the National Fuel Gas Code ANSI Z223.1/NFPA 54. In Canada: The Installation must conform with CSA B149.(1,2) INSTALLATION CODES and /or local installation codes. B 2. Carefully plan where you install the heater. Correc t combustion air supply and vent pipe installation ar e very important. If not installed correctly, fatal accidents can occur, such as carbon monoxide poisoning or fire. B 3. When the unit is installed indoors and ROOM SEALED (twin pipe) it is permitted to be located in bathrooms, bedrooms and occupied rooms that are normally kept closed. See chapter 3.3 (page 10). If the unit will be installed indoors and use indoor combustion air, the place where you install the hea ter must have enough ventilation. The National Fuel Gas Codes do not allow UNSEALED gas fired water heater installations in bathrooms, bedrooms or any occupied rooms normally kept closed. See chapter 3.4 (page 24). B 4. You must correctly vent your heater. See chapter 3.3 (page 10) on VENTING. B 5. The appliance and its gas connection must be leak tested before placing the appliance in operation. The appliance must be isolated from the gas supply piping system by closing its individual manual gas shutoff valve (not supplied with heater) during any pressure testing at pressures in excess of ½ Psig (3.5 kPa). B 6. Keep water heater area clear and free from combustibles and flammable liquids. Do not locate the heater over any material which might burn. B 7. Correct gas pressure is critical for the proper operation of this heater. Gas piping must be sized to provide the required pressure at the maximum output of the heater, while all the other gas appliances a re in operation. Check with your local gas supplier, and see the section on connecting the gas supply. See chapter 3.8 (page 26). B 8. Should overheating occur or the gas supply fail to shut off, turn off the gas supply at the manual gas shut off valve, on the gas line. Note: manual gas shutoff valve is not supplied with the heater but m ust be field installed. B 9. Do not use this appliance if any part has been underwater. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been underwater. B 10. Failure to install heater correctly may lead to unsafe operation and void the warranty.
6 720 644 894 Appliance details9 2.5 Dimensions and minimum installation clearances Fig. 6 Dimensions 1On/Off button 2 Reset button 3 Program key 4 Power ON or stand-by LED 5 LCD display 6 Up button 7 Down button Fig. 7 Minimum clearances Note: For servicing access, a 2ft clearance is recommended to the front cover. 6720608000-03.2AL 6 4 Model C 1050 ES TOP (A) 12” FRONT (B) 1” BACK0” SIDES1” FLOOR (C)12” Table 1 Minimum clearances
6 720 644 89410 Installation instructions 3 Installation instructions 3.1 Specialized tools The following specialized tools may be required for installation: • Manometer • Multi-meter • Combustion Gas Analyzer. 3.2 Introduction Please follow these instructions. Failure to follow instructions may result in: B Damage or injury. B Improper operation. B Loss of warranty. 3.3 Venting 3.3.1 Vent material All combustion air and vent pipe materials and fitt ings must comply with the following: For specific questions concerning vent material, specifications, usage or installation, please contact the vent manufacturer directly. All vent connections must be glued, except for the exhaust accessory (see section 3.3.4) which is screwed into place on the top of the appliance. Sli de the vent pipe into the exhaust accessory. The exhau st pipe must be properly supported and must be pitched a minimum of a ¼ inch per foot back to the applianc e. This allows the condensate to drain properly. An optional concentric vent/air intake termination can be used for the installation of a vertical or horiz ontal venting system. (see Fig. 8). The concentric vent/air intake body can be ordered from your local wholesaler. (Part# 196016). The appliance can also be installed with separate a ir intake and exhaust piping (see Fig. 11, Fig. 18 and Fig. 19, page 18).Warning: The water heater must be installed by a qualified installer in accordance with these instructions. If improperly installed, a hazardous condition such as explosion or carbon monoxide poisoning could result. Bosch Thermotechnology Corp. is not responsible for improperly installed appliances. i Common installation practice is to first determine the venting/ combustion air point of termination, then design the piping layout back to the heater. Warning: B Do not reduce the exhaust or combustion air vent pipe sizes. B Do not common vent with any other vented appliance or stove. B Do not use Type-B vent as the actual exhaust vent system for the appliance. Warning: Failure to vent the exhaust gases to the outside (see Table 2 for proper material) may result in dangerous flue gases filling the structure in which it is installed. Warning: In areas where outside temperatures routinely come close to freezing, sealed combustion operation is required. Concentric termination or separate terminations for combustion and vent, must be installed on the same wall or roof surface; however, never facing the direction of prevailing winds. Failure to do so may result in heat exchanger freezing and bursting. This failure is not covered under the manufacturers warranty. Warning: Protect the exhaust and inlet from leaves and debris by installing a screen on the end of the terminator. ¼ mesh minimum opening recommended on screen. ItemMaterialUnited StatesCanada Vent or air pipe and fitting PVC schedule 40 ANSI/ASTM D1785 CSA or ULC certified only (ULC-S636) PVC-DWV ANSI/ASTM D2665 CPVC schedule 40 ANSI/ASTM F441 ABS-DWV schedule 40 ANSI/ASTM D2661 Pipe cement / primer PVC ANSI/ASTM D2564 CPVC ANSI/ASTM F493 ABS ANSI/ASTM D2235 Table 2 Approved vent material i Do not use cellular foam core pipe.