A.O. Smith VF VB 500 User Manual Download Page 22 | Manualshive

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Summary of Contents for VF VB 500

Page 1: ...e 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 Installati...

Page 2: ...nces known to the State of California to cause cancer birth defects or other reproductive harm and requires businesses to warn of potential exposure to such substances This product contains a chemical...

Page 3: ...3 GENERAL SAFETY...

Page 4: ...trol assembly pro vided on the boiler met safe lighting and other performance criteria Detailed installation diagrams are found in this manual These diagrams will serve to provide the installer a refe...

Page 5: ...tally vented gas fueled heating appliance or equipment The sign shall read in print size no less than one half 1 2 inch in size GAS VENT DIRECTLY BELOW KEEP CLEAR OF ALL OBSTRUCTIONS INSPECTION The st...

Page 6: ...6 CONNECTION DIAGRAM...

Page 7: ...7...

Page 8: ...8 Figure 1 SCHEMATIC DIAGRAM VB VW 500 750 1000 SCHEMATIC DIAGRAM...

Page 9: ...9 LIGHTING OPERATION INSTRUCTIONS FOR MODELS VB VW 500 750 AND 1000...

Page 10: ...stem or something similar Through this connection multiple boilers can also be linked together CAUTION The internal communications cables should never be connected to the external communications conne...

Page 11: ...me rod is missing or shorted the flame will not be detected OUTPUTS FROM MCB Relay Contact Output Alarm MCB 24VAC optional Provides electrical power to operate an external alarm This can be an audio d...

Page 12: ...u activated screens Within each of the screens helpful information can be displayed by pressing the Help button The LED s visually inform the user about the mode the system is in The touch switches al...

Page 13: ...jump to the error state Description of FCB control states Idle State When any error is declared during idle state The system will remain in this state until the MCB request a heating cycle or a cold...

Page 14: ...to change the automatically resettable High Limit Setpoint 1 Press the MENU key 2 Scrollthe withtheDOWNkeynexttoUSERSETTINGSCREEN 3 Press the SELECT key 4 Scroll the with the DOWN key until it is poin...

Page 15: ...rds in screens to reach a desired item and to change setpoints and user settings They have an auto increment decrement feature for some of the configurations and values When you first press one of the...

Page 16: ...ected wiring Note The MRHL can be checked by disconnecting the outlet probe from the MCB and reading the resistance across the two active pins on the connectorattheendoftheprobecable Thevalueshouldbea...

Page 17: ...Give reasonably quiet operation during initial ignition operation and extinction Cause no excessive lifting of flame from burner ports If the preceding burner characteristics are not evident check fo...

Page 18: ...ible shortened service life BURNER MAINTENANCE Qualified servicers should follow this procedure when the boiler s burner needs cleaning 1 Turn off the electrical power to the boiler and close the main...

Page 19: ...solidsexist Asthewaterisheated these tendtodropoutdepositingasscaleorlime Thisscalemustberemoved before the heat exchanger tubes become blocked DELIMING The amount of calcium carbonate lime released f...

Page 20: ...20 notes...

Page 21: ...21 notes...

Page 22: ...22 notes...

Page 23: ...ation for the boiler or any of its parts Some states and provinces do not allow limitations on how long an implied warranty lasts so the above limitation may not apply to you 5 CLAIM PROCEDURE Any cla...

Page 24: ...24 500 Tennessee Waltz Parkway Ashland City TN 37015 Technical Support 800 527 1953 Parts 800 433 2545 Fax 800 644 9306 www hotwater com...

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