A.O. Smith BTI 120 warranty Operational Checklist, Remedy, Complaint Cause User Serviceman

Page 31

OPERATIONAL CHECKLIST

This checklist in conjunction with “TROUBLESHOOTING” and the “SEQUENCE OF OPERATION” should be used as an on-the-job troubleshooting guide to identify the cause of incorrect system operation and suggest a remedy for its correction. Because improper piping and wiring can result in unsatisfactory system performance, it is suggested that the installation be examined before using the checklist. Be sure to refer to the correct piping and wiring diagram for the type of system that is installed.

The system should be filled with water, purged of air, valves properly set and utilities connected and ready to operate.

 

 

REMEDY

 

 

 

 

 

COMPLAINT

CAUSE

USER

SERVICEMAN

 

 

 

 

 

*Water not hot enough.

Thermostat set too low.

Set thermostat dial to a higher

 

 

 

temperature.

 

 

 

 

 

 

Thermostat out of calibration.

Call serviceman

Recalibrate thermostat. If thermostat cannot

 

 

 

 

be recalibrated, replace.

 

 

 

 

 

*Insufficient hot water

Thermostat set too low.

Set thermostat dial to a higher

 

*See WATER TEMPERATURE

 

temperature.

 

CONTROL WARNING (on

 

 

 

 

 

 

 

 

Page 5).

Thermostat out of calibration.

Call serviceman.

Recalibrate thermostat. If thermostat cannot

 

 

 

 

be recalibrated, replace.

 

 

 

 

 

Main manual gas shutoff

Open main manual gas shutoff

 

 

valve partially closed.

valve to fullest extent.

 

 

 

 

 

 

Heater too small for demand.

Space usage to give heater time

 

 

 

to restore water temperature.

 

 

 

 

 

 

Thermostat differential is

Call serviceman.

Replace dual bulb controller if differential is

 

too wide.

 

 

greater than 4°F.

 

 

 

 

 

Heater recovery is slower.

Call serviceman.

Check gas input. If incorrect, adjust gas

 

 

 

 

pressure or replace main burner orifice.

 

 

 

 

 

Drafthood not installed or

Call serviceman.

Install drafthood or baffles as furnished

 

one or more flue baffles.

 

 

with unit.

 

 

 

 

 

Water temperature too hot.

Thermostat set too high.

Set thermostat to a lower setting.

 

 

 

 

 

 

Heater makes sounds: sizzling.

Condensation on outside

 

 

 

 

of tank, normal.

 

 

 

 

 

 

 

 

Rumbling.

Sediment accumulation on

Drain a quantity of water through

Delime heater.

 

bottom of tank.

drain valve. If rumbling persists,

 

 

 

call a serviceman.

 

 

 

 

 

 

Ticking or metallic sounds.

Expansion and contraction-

 

 

 

 

normal.

 

 

 

 

 

 

 

 

Pounding.

Air chambers in piping have

Drain piping system and refill.

 

 

become waterlogged.

Heater must be off while this is

 

 

 

being done.

 

 

 

 

 

 

Combustion noises.

Too much primary air.

Adjust shutters.

 

 

 

 

 

 

Overfired heater; Incorrect

Call serviceman.

Check and correct as necessary.

 

burners or orifice for type

 

 

 

 

of gas used.

 

 

 

 

 

 

 

 

Water leaks.

Drain valve not closed

If drain valve cannot be closed

 

 

tightly.

tightly, replace.

 

 

 

 

 

 

If leakage source cannot

Shut off gas supply to heater

Repair or in case of suspected tank leakage,

 

be corrected or identified,

and close cold water inlet valve

be certain to confirm before replacing heater.

 

call serviceman.

to heater.

 

 

 

 

 

 

Gas odors.

Heater is overfired.

Shut off gas supply to heater

Check for sooted flue passage.

 

 

and call a serviceman.

 

 

 

 

 

Check for obstructed vent line.

 

 

 

 

 

 

 

 

 

Check backdraft or lack of draft.

 

 

 

 

 

Possible gas leaks.

Shut off gas supply to heater and

 

 

 

call gas company at once.

 

 

 

 

 

 

31

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Contents
Commercial GAS, GLASS-LINED, TANK-TYPE Water Heater Models BTI 120 Thru 400/AFront View TOP View Back View ROUGH-IN-DIMENSIONS ROUGH-IN-DIMENSIONSGasand Electrical Characteristics Foreword Table of ContentsGeneral Safety Information High Altitude Installations FeaturesHigh Limit Switch Dishwashing Machine Requirement Electronic Ignition ControlExhaust Inducer Blower Assy Circulating PumpAIR Requirements LevelingClearances Hard WaterMultiple Heater Manifold VentingModel BTI-120 Type B GAS VentModel BTI-154 Model BTI-275 Model BTI-250Model BTI-310 System Connections Water Line ConnectionsWater Potable Heating and Space GAS PipingType of GAS GAS Piping and Dirt LEG InstallationGAS Pressure Regulator GAS Meter Size Natural Gases onlySingle Unit Wiring Diagram BTI-120 Through 400A Heater WiringCode Restrictions Installation DIAGRAMS-TOP INLET/OUTLET UsageTube Inlet Installation GeneralHorizontal Storage Tank and Forced Circulation Vertical Storage Tank and Forced CirculationPage Circulating Return Line Connection Installation DIAGRAMS-SIDE INLET/OUTLET UsageHeater with Mixing Valve and Recirculated Sanitizing Loop TWO PRE-HEATERS with Booster Heater Horizontal Storage Tank Manifold Kits Model Dimension aOperation Sequence of Operation What to do if YOU Smell GAS For Your Safety Read Before OperatingIgnitor Assembly Preventive MaintenanceWater Temperature Control Check the Ignitor AssemblyVenting System Remote Storage Tank Temperature ControlGAS Valves Checking the Input Draining HOT Water Odor Anode ROD Inspection FlushingDeliming Using FLO-JUG Method Tank Cleanout ProcedureDeliming Solvents Ignition Module System ServiceReplacement Parts System DiagnosticsYES Sequence of Operation Flow ChartComplaint Cause User Serviceman Operational ChecklistRemedy Tank Service and Repair ExpensesClaim Procedure Keepthiswarrantypostedadjacenttotheheaterforfuturereference
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