Bosch Appliances 250SX NG, 250SX LP manual Electrical connections, Operating instructions

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Appliance details

2.14 Electrical connections

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 heater should be in accordance with local codes and the Canadian Electrical Code, CSA C22.1 Part 1. Do not rely on the gas or water piping to ground the metal parts of the heater.

The 250 SX requires an electrical power supply from a 120VAC 60Hz circuit and must be properly grounded. A means for switching off the 120VAC power supply must be provided.

The heater is wired as shown in the wiring diagram (chapter 6, Fig. 36).

2.15 Operating instructions

BBefore proceeding with the operation of the heater make sure that the system is filled with water.

BTurn off power supply to heater.

BOpen the cold water inlet supply to the heater fully.

BOpen a hot water faucet to permit the water to fill the heater and the piping and to eliminate the air trapped in the system.

BClose the hot water faucet after the water flows freely and all the air has escaped from the system. Turn on power supply to heater. The water heater is now ready to operate.

NOTE: A default temperature setting of

i122 F will appear on the display screen.

2.16For your safety read before operating your water heater

Warning: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

A. This appliance is equipped with electronic ignition for lighting the main burners. When turning the heater on, follow these instructions exactly.

B. Before operating the unit, set the On/Off switch to the On ( I ) position.

WHAT TO DO IF YOU SMELL GAS

BDo not try to light any appliance.

BDo not touch any electric switch; do not use any phone in your building.

BImmediately call your gas supplier from a neighbors phone. Follow the gas supplier’s instructions.

BIf you cannot reach your gas supplier, call the fire department.

C. Use only your hand to turn the on/off control switch. Never use tools. Follow these instructions exactly. If control switch is jammed, close the gas supply and call a qualified service technician. Attempted forceful repair may result in a fire or explosion.

D. Do not use this appliance if any part has been under water. 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 under water.

2.17Lighting and operating instructions

B1. STOP! Read the previous safety information.

B2. The gas valve must be shut off by putting the ON/ OFF switch to position (0). Wait five (5) minutes to clear out any gas. If you smell gas, STOP! Follow “B” in the safety information above. If you do not smell gas, go to the next step.

B3. This appliance is equipped with electronic ignition for lighting the main burners. When turning the heater on, follow these instructions exactly.

B4. Set the ON/OFF switch to the (I) position. In this position, the water heater is ready to use.

B5. Open a hot water tap.

B6. The burners will remain on until the hot water tap is turned off.

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Contents What to do if you smell gas SX NG SX LPFeaturing For your safetyIndex IndexFCC 250 SX Specifications Technical data FeaturesAppliance details Gas types DimensionsSafety devices CombustionDimensions Dimensions and Minimum installation clearancesGeneral rules to follow for safe operation Proper location for installing your heaterVenting Clearances Mounting installationCombustion air requirements Venting Room Venting options Minimum exhaust vent size and lengthOpen combustion installation Single Pipe System Appliance details Room sealed installation Twin Pipe SystemDescription Minimum distance 720 607 GAS Line Sizing ShownFor LP GAS For Natural GASBe Included in the Pipe Sizing Gas line sizingPlumbing Connections and Pressure Relief Valve Water connectionsWhat to do if YOU Smell GAS For your safety read before operating your water heaterElectrical connections Operating instructionsTo Turn OFF GAS to Appliance Operation instructions PowerTemperature selection Operation instructionsFlow/temperature charts Operation instructions Setting the water temperatureProgram button Use of remote control accessoryReset button OperationTroubleshooting Maintenance and serviceTemperature balance valves TroubleshootingUnbalanced pressure in water lines Chapter Troubleshooting Display Cause SolutionElectrical diagram Electrical diagramSX Functional scheme SX Functional schemeInterior components diagram and parts list Interior components diagram and parts listInterior components Components Diagram Components diagramDescription Reference Parts listAdjusting the unit Special adjustment for measuring and adjusting CO2 levelsLeave Program mode AdjustingComponents Protecting the environmentProtecting the environment PackingTwelve Year Limited Warranty Controlled Energy Corp