A.O. Smith SBD 30 150 - Manual

5 In the event of high limit switch operation, the appliance cannotb e r e s t a r t e d u n l e s s t h e w a t e r t e m p e r a t u r e i s r e d u c e d t oapproximately 120°F (49°C). The high limit reset button on thefront of the control then needs to be depressed. Continued manual resetting of...

6 INSTALLATION INSTRUCTIONS REQUIRED ABILITY INSTALLATION OR SERVICE OF THIS WATER HEATERREQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSEDTRADESMAN IN THE FIELD INVOLVED. PLUMBING, AIRSUPPLY, VENTING, GAS SUPPLY AND ELECTRICAL WORK AREREQUIRED. WARNING FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT...

7 UNCONFINED SPACE In buildings of conventional frame, brick, or stone construction,unconfined spaces may provide adequate air for combustion,ventilation and draft hood dilution. If the unconfined space is within a building of tight construction(buildings using the following construction: weather st...

8 • Where a separate vent connection is not available and thevent pipe from the heater must be connected to a commonvent with an oil burning furnace, the vent pipe should enterthe smaller common vent or chimney at a point above thelarge vent pipe. MULTIPLE HEATER MANIFOLD When horizontally manifoldi...

9 GAS PIPING Contact your local gas service company to ensure that adequategas service is available and to review applicable installationcodes for your area. Size the main gas line in accordance with Table 2. The figuresshown are for straight lengths of pipe at 0.5 in. W.C. pressuredrop, which is co...

10 plate. The regulator is factory adjusted to deliver gas to burner atcorrect water column pressure allowing for a nominal pressuredrop through the controls. The minimum gas supply pressure for input adjustment mustnot be less than 4.5" w.c. for natural gas. D o n o t s u b j e c t t h e c o m ...

11 INSTALLATION DIAGRAMS GENERAL The type, size and location of the relief valves must be inaccordance with local codes. The locations of the relief valvesshown in the installation diagrams are typical. The heater has afactory installed high temperature limit switch and temperatureand pressure relie...

12 VERTICAL STORAGE TANK AND FORCED CIRCULATION DANGER T E M P E R AT U R E S E T T I N G S H O U L D N O T E X C E E D S A F E U S ETEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROLWARNING ON PAGE 20. IF HIGHER PREHEAT TEMPERATURES ARENECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD ANANTI-SCA...

13 DANGER T E M P E R AT U R E S E T T I N G S H O U L D N O T E X C E E D S A F E U S ETEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROLWARNING ON PAGE 20. IF HIGHER PREHEAT TEMPERATURES ARENECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD ANANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES. ...

14 INSTALLATION DIAGRAMS-SIDE INLET/OUTLET USAGE DANGER T E M P E R AT U R E S E T T I N G S H O U L D N O T E X C E E D S A F E U S ETEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROLWARNING ON PAGE 20. IF HIGHER PREHEAT TEMPERATURES ARENECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD ANANTI-SC...

18 OPERATION IMPORTANT A qualified person must perform the initial firing of the heater. Atthis time the user should not hesitate to ask the individual anyquestions which they may have in regard to the operation andmaintenance of the unit. An Operational Checklist is included at the rear of this man...

19 A. This appliance does not have a pilot. It is equippedwith an ignition device which automatically lights theburner. Do not try to light the burner by hand. B. BEFORE OPERATING smell all around the appliance areafor gas. Be sure to smell next to the floor becausesome gas is heavier than air and w...

20 WATER TEMPERATURE CONTROL DANGER THIS WATER HEATER IS EQUIPPED WITH AN ADJUSTABLETHERMOSTAT TO CONTROL WATER TEMPERATURE. HOTWATER TEMPERATURES REQUIRED FOR AUT OMAT I CDISHWASHER AND LAUNDRY USE CAN CAUSE SCALD BURNSRESULTING IN SERIOUS PERSONAL INJURY AND/OR DEATH.THE TEMPERATURE AT WHICH INJUR...

21 NOTE:1. Remove main burners from unit. 2. Check that burner venturi and ports are free of foreign debris. 3. Clean burners with bristle brush and/or vacuum cleaner - DO NOT distort burner ports or pilot location. 4. Reinstall burners in unit. Make sure front and rear of burners are installed corr...

23 FIGURE 14 DELIMING SOLVENTS State Water Heaters recommends the use of UN•LIME fordeliming. UN•LIME is a patented food grade acid which is safeto handle and does not create the harmful fumes which areassociated with other products. UN•LIME may be obtained from your dealer or distributor. OrderPart...

24 SYSTEM DIAGNOSTICS Your water heater is equipped with an ignition module thatincorporates a diagnostic system to assist in troubleshootingthe appliance. The indicator codes on the ignition module areas follows: 1 flash System lockout (retries or cycles exceeded) 2 flashes Pressure switch stuck cl...

25 SEQUENCE OF OPERATION FLOW CHART Description of this flow chart can be found in the “SEQUENCE OF OPERATION” section found on page 23. Switch power on to unit. Thermostat calls for heat. Ignition Control Board performs diagnostic check on components Ignition Control Board sends power to Exhaust In...

26 OPERATIONAL CHECKLIST This checklist in conjunction with “TROUBLESHOOTING” and the “SEQUENCE OF OPERATION” should be used as an on-the-jobtroubleshooting guide to identify the cause of incorrect system operation and suggest a remedy for its correction. Becauseimproper piping and wiring can result...

27 Model SBD Limited Warranty State Water Heaters, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater. 1. THE TANK If the glass-lined tank in this water heater shall prove upon examination by the warrantor to have leaked due to natural corrosion from potablewater...