State Industries STC-074 Test 2 Polarity Check, Test 3 Continuity Check High Limit ECO

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SBN TANK TYPE COMMERCIAL GAS WATER HEATER

SERVICE HANDBOOK

TEST 2 - POLARITY CHECK - continued

TEST 2

Polarity Check

Check from on/off switch center and white wire terminals to ground

	If…	...then
	115-125 VAC is not present	see Test 1.
	voltage is present white (right terminal) to	reverse supply wire connections - polarity is
	ground but not black (center terminal) to	reversed.
	ground	reversed.
	ground

TEST 3 - CONTINUITY CHECK

OF HIGH LIMIT (ECO)

Conditions:

Power On – No Hot Water

Red, heater control “Call for Heat” LED – on

Red, ignition control board diagnostic LED – 4 Flashing

Note LED Flash Code before resetting heater.

See Description of diagnostic LED Flashes.

Turn Power “Off”

Continued on next page

©2003

28

Technical Training Department

Ashland City, Tennessee

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Contents Service Handbook Table of Contents SBN Service Handbook Introduction Custom Commercial Storage Tank Model Number Break Down QualificationsTop and Front Views of Minimum Clearances To Combustibles Installation ConsiderationsRequired Exterior Clearances Exterior ClearanceComb AIR Make-Up Air Direct Communication Not Direct Vent Make-Up Air Horizontal Ducts Make-Up Air Vertical DuctsAir for Combustion Flammable Items Contaminated AirGas Valve Outlet View Venting Atmospheric Multiple Heaters VentingNine Rules for Good Vents SBN Tank Type Commercial GAS Water Heater Service Handbook SBN Tank Type Commercial GAS Water Heater Service Handbook Multiple Gas Fired Tank-Type Heaters Type B GAS VentTechnical Dataventing Top View SequenceFront View of Water Heater SBN Tank Type Commercial GAS Water Heater Service Handbook HSI Integrated Ignition Control Board HSI Lower Front View of SBN Water HeaterECO Wiring DiagramElectrical Sequence of SBN Water Heater Operation PRE-SERVICE Checklist Water Heater Control Ignition Control Board ConditionsTest 2 Polarity Check Flash Codes of Diagnostic IndicatorTest 3 Continuity Check High Limit ECO Test 2 Polarity CheckTest 3 Continuity Check of High Limit ECO Test 4 Upper Temperature Probe Continuity CheckIs indicated Is not presentCheck to Inducer Test on Ignition Board 4 Pin Receptacle E4 Test 5 Calling for Heat no Inducer OperationWater Heater Control VAC Check of Blower Prover/Low Gas Pressure Circuit Test 6 Inducer ON-NO IgnitionVoltage is not present between E4, Pin Test of Igniter and gas valve circuit Test 8 Igniter Heats no Main BurnerContinuity Check Of Gas Valve Coil Test 9 Igniter Heats no Main BurnerFlame Prover Circuit Check Test 10 Main Burner Ignition for Less than 5 SecondsIf… Then Test 11 Water Heater Shutting OFF below SettingDisplay Lights on Integrated Heater Control ECO SBN Tank Type Commercial GAS Water Heater Service Handbook Technical Training Department 120 154 180 199 200A 250A 275A 310A 366A 400A General Questions and Answers SBN Tank Type Commercial GAS Water Heater Service Handbook Draft Proving Pressure Switch Table