State Industries GS6, GSX, GPX manual Normal Operation

Page 10

BASIC INSTALLATION & OPERATION

Burner/Manifold Door Assembly: The burner/manifold assembly consists of several components such as: main burner, burner orifice, manifold tube, pilot burner, pilot orifice, pilot tube, igniter, and thermocouple. See the figure below for the complete list of components.

The pilot burner remains on once it is manually lit. When incoming cold water activates the thermostat, gas flows to the main burner. The pilot flame ignites this gas. The main flame burns until the tank reaches set temperature then the thermostat interrupts this main gas flow.

Figure 3

Igniter Wire

 

Pilot Tube

 

 

 

Manifold Door

Main Burner

 

Burner Orifice*

Manifold Tube

 

 

 

TCO (Thermal Cut

 

Pilot (Burner)

 

 

Off) Switch

 

Thermocouple

 

View Port

 

Pilot Assembly View

Pilot (Burner)

Piezo Igniter Tip

 

Pilot Bracket

NOTE: The base of the

 

Pilot Orifice*

Thermocouple must be

flush with the base of

 

Ferrule

the pilot bracket.

 

 

 

Igniter Wire

Pilot Nut

 

TCO (Thermal Cut

 

TCO Reset

 

Thermocouple

Off) Sensor

 

 

 

Button

 

Burner Screws

Pilot Tube

Front View

Door Gasket

 

 

 

*DO NOT operate the water heater without the pilot and burner orifices installed.

 

Normal Operation

Figure 4

Pilot: The pilot flame heats the end of a thermocouple.

Reset

Button Gas Control Knob

 

As the thermocouple gets hotter, it generates a small

 

(cannot be detected without an electrical meter)

 

electrical current to the bottom of the gas control valve/

 

thermostat. This current powers the electromagnet

Safety Valve

and holds open the main gas interrupter as long as the

 

pilot flame is heating the thermocouple. The normal

 

voltage for a properly working thermocouple is between

 

20 and 30 mv. DANGER! If the pilot is extinguished,

 

it can take up to 180 seconds for the thermocouple to

Safety Valve

cool sufficiently to close the safety valve.

 

 

Pilot

 

Flame

 

RobertShaw Gas Control Valve/Thermostat Shown.

 

10

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Contents
Models GPX, GS6, GSX Series 200/201 06/09 316876-000Page Service Handbook Tools Required for servicing gas modelsFire or Explosion Harzard Insufficient HOT Water No HOT WaterWater Leakage Problem Possible Cause Test / Corrective Action Table of Contents Water Supply- Cold Use & Care Guide for clearances Basic Installation & OperationSee Labels and Installation Instructions To Fixtures HotHot Water Temperature-PressureAnode Rod Cold WaterNormal Operation Thermal Cut Off Switch TCO The water heater Basic Installation & Operation Combustion Air Requirements Carbon Monoxide WarningReference Vent Connectors PER FT Draining and Filling the Water Heater Draining the Water Heater Filling the Water HeaterChecking the GAS Supply Pressure Checking for Sufficient Combustion AIR or Venting IssuesThen Draft Test Testing the Thermocouple and GAS Control VALVE/THERMOSTAT Thermal Switch ModelsRemoving the Burner from the Manifold/ Burner Assembly Removing the Manifold/Burner AssemblyReplacing the Thermocouple Replacing the Thermocouple and GAS Control VALVE/THERMOSTAT Replacing the Manifold/Burner AssemblyExplosion Hazard Removing the Gas Valve Removing and Replacing the Gas Control Valve/ThermostatReplacing the Gas Valve Water Time to Produce 2nd & 3rd GAS Water Heater Sizing Guide Leakage CheckpointsTechnical Bulletins 35-36Effects Water HammerGeneral FIXMineral BUILD-UP SymptomsCause If tank is new with no lime build-up to any degree Aluminum HydroxideIf tank is new with lime build-up to any degree Causes CondensationDiagnosis Discolored Water TreatmentSmelly Water Procedure Chlorination ProcedureStep Test Not Enough HOT Water GASResults Thermal Expansion Outlet Inlet Cold Water Inlet Valve SHUT-OFF Valve Leaking Temperature and Pressure Relief Valve Insulation Blankets General Information Formulas and ConversionsMM millimeters =Inches X Page Page
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