Ao-smith BPD-400 User Manual

1A DIVISION OF A.O. SMITH CORPORATIONMc BEE, SOUTH CAROLINAPLACE THESE INSTRUCTIONS ADJACENT TO HEATER ANDNOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.PR

10CLEARANCESThe unit is approved for installation on combustible flooring in an alcovewhen the minimum clearance to combustibles is maintained per Fig

11FIGURE 9WIRE FENCEWhen the water heater outlet terminal is low enough to be touchedaccidentally, or is accessible to small children, a wire mesh cha

12FIGURE 10WATER PIPING WARNINGHOTTER WATER CAN SCALD: WATER HEATERS ARE INTENDED TOPRODUCE HOT WATER. WATER HEATED TO A TEMPERATURE WHICHWILL SATISFY

13FILLING THE WATER HEATER CAUTIONNEVER USE THIS WATER HEATER UNLESS IT IS COMPLETELY FILLEDWITH WATER. TO PREVENT DAMAGE TO THE TANK, THE TANK MUSTBE

14WIRING DIAGRAM FOR ROBERTSHAW CONTROLSYSTEM - NATURAL GAS ONLYNOTE: If any of the original wire as supplied with the water heatermust be replaced, i

15VENTING WARNINGTO INSURE PROPER VENTING OF THIS GAS-FIRED WATERHEATER, THE CORRECT VENT PIPE DIAMETER MUST BEUTILIZED. ANY ADDITIONS OF OTHER GAS AP

16VENTING (CONT'D)TYPICAL INSTALLATION - UP TO 110' (33.5 m)Follow illustration above if making an immediate horizontal run of ventoff the b

173. Minimum vent length is 18" (46 cm) when 4" pipe is used and 45'(13.7 m) when 6" pipe is used.CEMENTING PVC OR CPVC PIPE AND F

18The 4" or 6" PVC Schedule 40 or CPVC Schedule 40 or 80 vent pipes canbe run from the water heater through the wall or from the wall to the

19CONNECTING VENT TO BLOWER - 6" VENT PIPING1. If making an immediate horizontal run of vent off the blower, a 7 1/4" (18.4cm) min. long

2Input Capacity SHIPPINGBTU GallonGAS WEIGHTModel (kw-Hr.) (Liters) "A" "B" "C" "D" "

20gas control valve could result in a fire or explosion fromleaking gas. WARNINGIf the main gas line shutoff serving all gas appliances is used,also t

21Before attaching the gas line be sure that all gas pipe is cleanon the inside. To trap any dirt or foreign material in the gassupply line, a drip le

22Before the water heater will operate:1. The control system must be connected to a 110/120 power supply. Thiscontrol system has an overall rating of

23A. This appliance is equipped with an ignition device which automaticallylights the pilot. Do not try to light the pilot by hand.B. BEFORE OPERATING

24TEMPERATURE REGULATION DANGERHOT WATER CAN SCALD: WATER HEATERS ARE INTENDED TOPRODUCE HOT WATER. WATER HEATED TO A TEMPERATURETHAT WILL SATISFY SPA

25SMOKE/ODORIt is not uncommon to experience a small amount of smoke and odorduring the initial start-up. This is due to burning off of oil from metal

26pilot. If the water was extremely hot and is now cold, the highlimit safety temperature shut off may have put out the burnerand pilot. Refer to “Hig

27for cleaning, call the local gas utility to remove and clean the burnerand correct the problem that required the burner to be cleaned.HOUSEKEEPINGVa

28ONE TEMPERATURE - ONE HEATER HORIZONTAL STORAGE TANKFORCED CIRCULATION WITH OR WITHOUT BUILDING RECIRCULATION DANGERTEMPERATURE SETTING SHOULD NOT E

29*PIPE RELIEF VALVE TO OPEN DRAIN.NOTE: IF TEMPERED WATER ISRECIRCULATED, RETURN LINE SHOULD BECONNECTED AT POINT “A”.INSTALL IN ACCORDANCE WITH LO

3TYPICAL INSTALLATIONINTAKE FORCOMBUSTION AIRVENT TOOUTDOORSFLUE PRODUCTSDISCHARGE PIPEAIR INTAKE PIPETEMPERATUREPRESSURE RELIEFVALVEVACUUM RELIEF REQ

30TWO TEMPERATURE - TWO HEATERS HIGH TEMPERATUREWITH OR WITHOUT BUILDING RECIRCULATIONTWO TEMPERATURE - THREE HEATERS (TWO PRE-HEATERS/ONE BOOSTER HEA

31* PIPE RELIEF VALVE TO OPEN DRAIN** 140°F (60°C)TO 150°F (66°C) SHOULD BE MAXIMUM WATERTEMPERATURE MAINTAINED IN THE PRE-HEATERS.120°F (49°C) SHOULD

32NOTE 1: TOGGLE SWITCH CONTROLS 180°F (82°C) WATER CIRCULATION.INSTALL ON OR CLOSE TO DISHWASHER. TOGGLE SWITCH MUST BECLOSED (ON) DURING THE RIN

33MANIFOLD KITSPrecision cut type “L” all copper A.O. Smith manifold kits assure water flow balance of all units. Without this balance, the full water

34SEDIMENT REMOVALWaterborne impurities consist of the particles of soil and sand whichsettle out and form a layer of sediment on the bottom of the ta

35Model BPD 400 Limited WarrantyA. O. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater.1. T

36A.O. SMITH WATER PRODUCTS CO.500 Tennessee Waltz Parkway, Ashland City, TN 37015PHONE: 1-800-433-2545 • FAX: 1-800-433-2515 www.hotwater.com / emai

4These designs comply with the current version of the American NationalStandard for Gas Water Heaters, Volume III, ANSI Z21.10.3 / CSA 4.3 asautomatic

5SERVED BY THIS HEATER THAT HAS NOT BEEN USED FOR A LONGPERIOD OF TIME (GENERALLY TWO WEEKS OR MORE). HYDROGENGAS IS EXTREMELY FLAMMABLE. To reduce th

6foot of air. Therefore, the heater input rate should be reduced at highaltitudes for satisfactory operation with the reduced oxygen supply.Failure to

7ROBERTSHAW 47484A PILOT SENSORROBERTSHAW DERHC-S7C NATURAL 1" x 1" GAS VALVEGAS VALVEThe gas valve is used to supply the gas to the unit du

8STEP DOWN TRANSFORMERThe controls system utilizes a 120/24 VAC step down transformer.Most of the control system utilizes 24 VAC for operation. See wi

9HIGH LIMIT SWITCHThe surface mounted high limit switch monitors the flue gases escapingthrough the blower assembly to ensure the temperatures do not