Commercial Gas BCL275-400 (Series 104) - American Water Heaters

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For Your InformationStart Up ConditionsSmoke/OdorIt is not uncommon to experience a small amount of smoke andodor during the initial start-up. This is due to burning off of oilfrom metal parts, and will disappear in a short while.Strange SoundsPossible noises due to expansion and contraction of some metalparts during periods of heat-up and cool-down do not necessarilyrepresent harmful or dangerous conditions.Condensation causes sizzling, popping, or chirping soundswithin the burner area during heating and cooling periods andshould be considered normal.Operational ConditionsHot Water OdorIn each water heater there is installed at least one anode rodfor corrosion protection of the tank. Certain water conditionswill cause a reaction between this rod and the water. The mostcommon complaint associated with the anode rod is one of a“rotten egg odor” in the hot water. The odor is a result of fourfactors which must all be present for the odor to develop:a. A concentration of sulfate in the supply water.b. Little or no dissolved oxygen in the water.c. A sulfate reducing bacteria which has accumulated within thewater heater (this harmless bacteria is nontoxic to humans).d. An excess of active hydrogen in the tank. This is caused bythe corrosion protective action of the anode.Hot water odor may be eliminated or reduced in some waterheater models by replacing the anode(s) with one of less activematerial, and then chlorinating the water heater tank and allwater lines.Contact the local water heater supplier or service agency forfurther information concerning an Anode Replacement Kit andthis chlorination treatment.If hot water odor persists after anode replacement and chlorinationtreatment, we suggest that chlorination or aeration of the watersupply be considered to eliminate the water problem.Do not remove the anode leaving the tank unprotected. By doingso, all warranty on the water heater tank is voided.“Air” In Hot Water FaucetsHYDROGEN GAS: Hydrogen gas can be produced in a hotwater system that has not been used for a long period of time(generally two weeks or more). Hydrogen gas is extremelyflammable and explosive. To prevent the possibility of injuryunder these conditions, we recommend that the hot waterfaucet located farthest away from the water heater be openedfor several minutes before any electrical appliances whichare connected to the hot water system are used (such as adishwasher or washing machine). If hydrogen gas is present,there will probably be an unusual sound similar to air escapingthrough the pipe as the hot water faucet is opened. Theremust be no smoking or open flame near the faucet at the timeit is open.High Water Temperature Shut Off SystemThis water heater is equipped with a manual reset type highlimit (Energy Cutout) switch. The high limit switch interruptsthe main burner gas flow should water temperature reach203°F (95°C).In the event of high limit switch operation, the water heatercannot be restarted unless the water temperature is reduced toapproximately 120°F (49°C). The high limit reset button on thefront of the thermostat then needs to be depressed. See Figure3. for the location of the reset button.32
TroubleshootingCOMPLAINTCAUSEUSER*Water not hot enough Thermostat set too low. Set thermostat dial to a highertemperatureUpper and/or lower temperature Call qualified service agencyprobe out of calibration.*Insufficient hot water*See WATER TEMPERATURECONTROL WARNING (on page12).Thermostat set too low.Upper and/or lower temperatureprobe out of calibration.Main manual gas shutoff valvepartially closed.Heater too small for demand.Set thermostat dial to a highertemperatureCall qualified service agencyOpen main manual gas shutoffvalve to fullest extent.Space usage to give heater timeto restore water temperature.REMEDYQualified Service AgencyCheck continuity and resistance (Ohms)of upper and lower temperature probes.Replace probes if out of specification.Check continuity and resistance (Ohms)of upper and lower temperature probes.Replace probes if out of specification.Heater recovery is slower. Call qualified service agency Check gas input. If incorrect, checkfor inlet air blockage and/or flue gasexhaust blockage.Water temperature too hot. Thermostat set too high. Set thermostat to a lower setting.Rumbling.Sediment accumulation onbottom of tank.Ticking or metallic sounds. Expansion and contraction -normal.Pounding or water hammer. Air chambers in piping havebecome waterlogged. Thermalexpansion tank damaged,improperly charged, orimproperly sized.Drain a quantity of water throughdrain valve. If rumbling persists,call a qualified service agency.Drain piping system and refill.Heater must be off while thisis being done. Check thermalexpansion tank charge pressurewhen the water system pressureis zero.Water leaks. Drain valve not closed tightly. If drain valve cannot be closedtightly, replace.If leakage source cannot becorrected or identified, callqualified service agency.Shut off gas supply to heaterand close cold water inlet valveto heater.Gas odors. Possible gas leaks. Shut off gas supply to heaterand call gas company at onceDelime heater.Follow the manufacturer's instructionsfor proper charging of the thermalexpansion tank.Repair or in case of suspected tankleakage, be certain to confirm beforereplacing heater.33
Page 1: Instruction ManualCommercial gas wa
Page 6 and 7: IntroductionThank You for purchasin
Page 8: Installation considerationsRough In
Page 14 and 15: No valve or other obstruction is to
Page 16: Multiple Heater ManifoldOutdoor Air
Page 19: Table 7. TECHNICAL DATA VENTING (Co
Page 23 and 24: Gas PipingContact your local gas se
Page 25 and 26: Supply gas pressure shall be measur
Page 27 and 28: Sequence of Operation Flow ChartDes
Page 29 and 30: Draining and FlushingBurn harzard.H
Page 34 and 35: Water Piping DiagramsMULTI FLUE - (
Page 36 and 37: MULTI FLUE - (1 UNIT) WITH MIXING V
Page 38 and 39: MULTI FLUE - (2 UNITS) WITH VERTICA
Page 40 and 41: LEGENDMULTI FLUE - (2 UNITS) WITH H
Page 42: LEGENDMULTI FLUE (2 UNITS) WITH BOO
Page 45 and 46: MULTI-FLUE (3 UNITS) WITH HORIZONTA
Page 47: MULTI-FLUE (4 UNITS) WITH VERTICAL
Page 50 and 51: Notes50

Commercial Gas BCL275-400 (Series 104) - American Water Heaters

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