American Water Heater (A)BCL3 85T390 6NOX Technical Information

PRINTED IN THE U.S.A. 0413 324660-001SERVICING SHOULD ONLY BE PERFORMED BY A QUALIFIED SERVICE TECHNICIANService HandbookCOMMERCIAL GAS WATER HEATERS

8Servicing should only be performed by a Qualied Service TechnicianFEATURES AND COMPONENTS – ALL MODELSInlet TubeT & P Relief ValveUpper Thermost

9Servicing should only be performed by a Qualied Service TechnicianBLOWER AND BURNER ASSEMBLYBURNER REPLACEMENT:1. Turn off the gas supply and elect

10Servicing should only be performed by a Qualied Service Technician7. Remove the 4 brass nuts and 4 lock washers holding the flange plate to the sk

11Servicing should only be performed by a Qualied Service TechnicianSPARK IGNITER, FLAME SENSOR, SIGHT GLASSThe spark igniter and the flame sense rod

12Servicing should only be performed by a Qualied Service TechnicianVENTINGINSTALLATION – VENTING CATEGORY AND MATERIALSBCL3 MODELS VENTINGCategory I

13Servicing should only be performed by a Qualied Service TechnicianEXTERIOR CLEARANCESThe illustration below shows the required clearances for venti

14Servicing should only be performed by a Qualied Service TechnicianVENTING TABLES – TECHNICAL VENTING DATATYPE B GAS VENTMultiple Gas Fired Tank-Typ

15Servicing should only be performed by a Qualied Service TechnicianTYPE B GAS VENTSingle Gas Fired Tank-Type HeaterWhen venting single tank type wat

16Servicing should only be performed by a Qualied Service TechnicianOPERATION AND SERVICESEQUENCE OF OPERATION:1. Switch power on to unit.2. Thermo

17Servicing should only be performed by a Qualied Service TechnicianDIAGNOSTIC SEQUENCE OF OPERATION – FLOW CHART

18Servicing should only be performed by a Qualied Service TechnicianSEQUENCE OF OPERATION – FLOW CHART

19Servicing should only be performed by a Qualied Service TechnicianLIGHTING AND OPERATING LABELSNOITCURTSNI GNITAREPOGNITAREPO EROFEB DAER YTEFAS RU

20Servicing should only be performed by a Qualied Service TechnicianTROUBLESHOOTINGCOMPLAINT CAUSEREMEDYUSER QUALIFIED AGENCY*Water not hot enough. T

21Servicing should only be performed by a Qualied Service TechnicianCONTROLS OVERVIEW - CONTROL BOX ASSEMBLYVariable Frequency DriveDigital Thermosta

22Servicing should only be performed by a Qualied Service TechnicianPRESSURE SWITCHES – ALL MODELSAll models are provided with three pressure switche

23Servicing should only be performed by a Qualied Service TechnicianBLOWER PROVER SWITCHThe blower prover switch is provided on the heater to verify

24Servicing should only be performed by a Qualied Service TechnicianDISPLAY LIGHTS – DIGITAL THERMOSTATLED STATUSINDICATION ACTIONCalling for heat No

25Servicing should only be performed by a Qualied Service TechnicianCONTINUITY CHECK OF HIGH LIMIT (ECO)Continuity check of ECO (energy cut-out, high

26Servicing should only be performed by a Qualied Service TechnicianUPPER TEMPERATURE PROBE CONTINUITY CHECKOHMS RESISTANCE TABLE° FOHMS70° 11,884120

27Servicing should only be performed by a Qualied Service TechnicianLOWER TEMPERATURE PROBE CONTINUITY CHECKOHMS RESISTANCE TABLE° FOHMS70° 11,884120

1Servicing should only be performed by a Qualied Service TechnicianTABLE OF CONTENTSINTRODUCTION ...

28Servicing should only be performed by a Qualied Service TechnicianIGNITION CONTROLEach heater is equipped with an ignition control. The solid state

29Servicing should only be performed by a Qualied Service TechnicianSTART UP/ FLAME RECOVERY/ SAFETY LOCKOUTSTART UP - HEAT MODEWhen a call for heat

30Servicing should only be performed by a Qualied Service TechnicianFAULT CONDITIONSThe water heater is equipped with an ignition control that incorp

31Servicing should only be performed by a Qualied Service TechnicianVARIABLE FREQUENCY DRIVE – ALL MODELSThe BCL3 95T199 6NOX, (A)BCL3 85T275 6NOX an

32Servicing should only be performed by a Qualied Service TechnicianTwo conditions must be met for the variable frequency drive to switch the blower

33Servicing should only be performed by a Qualied Service TechnicianWIRING DIAGRAM FOR (A)BCL3 95T1996NOX, 85T2756NOX AND 85T3906NOX WHEN EQUIPPED WI

34Servicing should only be performed by a Qualied Service TechnicianNOTES

35Servicing should only be performed by a Qualied Service TechnicianNOTES

COMMERCIAL GAS WATER HEATERSVisit the "Information Central" link of www.americanwaterheater.com for a listing of available Service Handbooks

2Servicing should only be performed by a Qualied Service TechnicianINTRODUCTIONThe service handbook is designed to aid in servicing and troubleshooti

3Servicing should only be performed by a Qualied Service TechnicianTOOLS REQUIRED• Electrical multimeter capable of measuring continuity/ ohms, ac &

4Servicing should only be performed by a Qualied Service TechnicianINSTALLATION CONSIDERATIONSGAS AND ELECTRICAL CHARACTERISTICSMODELS GAS TYPEGAS SU

5Servicing should only be performed by a Qualied Service TechnicianAIR SUPPLY:Stoichiometric or theoretical complete combustion requires 10 cubic fee

6Servicing should only be performed by a Qualied Service TechnicianMAKE-UP AIR – DIRECT COMMUNICATION WITH OUTDOORS:A fresh supply of make-up air for

7Servicing should only be performed by a Qualied Service TechnicianAIR REQUIREMENTS:For safe operation an adequate supply of fresh uncontaminated air