State Industries GPX, GSX, GS6 manual Removing and Replacing the Gas Control Valve/Thermostat

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REPLACING THE THERMOCOUPLE AND GAS CONTROL VALVE/THERMOSTAT

CLOSE-UP INSIDE VIEW OF

THE COMBUSTION CHAMBER.

SLOT

TIP BRACKET

MANIFOLD TUBE

Figure 27

Removing and Replacing the Gas Control Valve/Thermostat

IMPORTANT: This water heater has a resettable thermal switch installed. Do not attempt to disable or modify this feature in any way. Use only factory authorized replacement parts.

Removing the Gas Valve:

1.Turn off the gas supply to the water heater at the manual gas shut-off valve. This valve is typically located beside the water heater. Note the position of the shut-off valve in the open/on position then proceed to turn it off.

2.On the lower front of the water heater locate the gas control valve/thermostat. Before performing any maintenance, it is important to turn the temperature dial on the gas control valve/ thermostat to its lowest setting.

3.On top of the gas control valve/thermostat turn the gas control knob to the “OFF” position. NOTE: On the White-Rodgers® gas control valve/thermostat the knob stop must first be depressed before turning the gas control knob. See Lighting Instructions on the water heater.

4.Drain the water heater. Refer to the section of “Draining and Flushing” section and follow the procedure.

5.Disconnect the piezo igniter wire from the piezo igniter button. NOTE: There are two types of igniters. If you have the square igniter, slide the igniter bracket backwards away from the gas valve to remove it. If you have the round igniter, first remove the igniter from the bracket by depressing front and rear holding tabs and lift. Next remove igniter bracket from the gas valve. Disconnect the thermocouple, pilot tube, the two connectors attached to the thermal switch, and manifold tube at the gas control valve/thermostat. NOTE: L.P. gas systems use reverse (left-hand) threads on the manifold tube.

6.Refer to “Gas Piping” section and disconnect the ground joint union in the gas piping. Disconnect the remaining pipe from the gas control valve/ thermostat.

7.To remove the gas control valve/thermostat, thread a correctly sized pipe into the inlet and use it to turn the gas control valve/thermostat (counterclockwise.) Do not use pipe wrench or equivalent to grip body. Damage may result, causing leaks.

Do not insert any sharp objects into the inlet or outlet connections. Damage to the gas control valve/ thermostat may result.

Replacing the Gas Valve:

1.To replace the gas control valve/thermostat, reassemble in reverse order. When replacing the gas control valve/ thermostat, thread a correctly sized pipe into the inlet and use it to turn the gas valve (clockwise.) DO NOT OVER TIGHTEN or damage may result. NOTE: Use an approved TEFLON® tape or pipe compound only on the threaded section of the gas control valve/ thermostat that screws into the tank.

2.Reconnect the gas piping to the gas control valve/ thermostat. NOTE: Use an approved Teflon tape or pipe compound on the gas piping connections.

3.Attach the igniter and bracket to the new gas control valve/thermostat, clipping it at the back edge of thermostat and snapping it into place. NOTE: Do not use the (pilot) ferrule nut supplied with the new gas control valve/thermostat, unless the existing nut is not usable. Reconnect the pilot tube, manifold tube, igniter wire, and thermal switch wires. NOTE: L.P. gas systems use reverse (left-hand) threads on the manifold tube.

4.Fill the tank completely with water. NOTE: To purge the lines of any excess air, keep the hot water faucet open for 3 minutes after a constant flow of water is obtained.

5.Turn on the gas supply and test the gas supply connections by brushing on an approved noncorrosive leak detection solution. Bubbles forming indicate a leak. Correct any leak found.

6.Check the operation of the burner by following the lighting instructions on the front of the water heater. With the burner lit, check the gas control valve/ thermostat supply line, manifold tube and pilot tube connections for leaks.

7.Verify proper operation and then replace the outer door.

8.If additional information is required, contact Residential Technical Assistance by referencing the phone number on the water heater.

TEFLON® is a registered trademark of E.I. Du Pont De Nemours and Company

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Contents 06/09 316876-000 Models GPX, GS6, GSX Series 200/201Page Tools Required for servicing gas models Service HandbookFire or Explosion Harzard Water Leakage No HOT WaterInsufficient HOT Water Problem Possible Cause Test / Corrective Action Table of Contents To Fixtures Hot Basic Installation & OperationSee Labels and Installation Instructions Water Supply- Cold Use & Care Guide for clearancesCold Water Temperature-PressureAnode Rod Hot WaterNormal Operation Thermal Cut Off Switch TCO The water heater Basic Installation & Operation Carbon Monoxide Warning Combustion Air RequirementsReference Vent Connectors PER FT Draining the Water Heater Filling the Water Heater Draining and Filling the Water HeaterThen Checking for Sufficient Combustion AIR or Venting IssuesChecking the GAS Supply Pressure Draft Test Thermal Switch Models Testing the Thermocouple and GAS Control VALVE/THERMOSTATReplacing the Thermocouple Removing the Manifold/Burner AssemblyRemoving the Burner from the Manifold/ Burner Assembly Explosion Hazard Replacing the Manifold/Burner AssemblyReplacing the Thermocouple and GAS Control VALVE/THERMOSTAT Replacing the Gas Valve Removing and Replacing the Gas Control Valve/ThermostatRemoving the Gas Valve Water Time to Produce 2nd & 3rd Leakage Checkpoints GAS Water Heater Sizing Guide35-36 Technical BulletinsFIX Water HammerGeneral EffectsCause SymptomsMineral BUILD-UP If tank is new with lime build-up to any degree Aluminum HydroxideIf tank is new with no lime build-up to any degree Diagnosis CondensationCauses Treatment Discolored WaterSmelly Water Step Chlorination ProcedureProcedure Results Not Enough HOT Water GASTest Thermal Expansion Outlet Inlet Cold Water Inlet Valve SHUT-OFF Valve Leaking Temperature and Pressure Relief Valve Insulation Blankets Formulas and Conversions General InformationMM millimeters =Inches X Page Page

GPX, GS6, GSX specifications

State Industries offers a range of high-quality residential and commercial water heaters that cater to diverse customer needs. Among their prominent models are the GSX, GS6, and GPX, each equipped with unique features, advanced technologies, and distinct characteristics that enhance their performance and efficiency.

The GSX series is well-known for its energy efficiency and reliability. It utilizes a high-efficiency gas burner to provide fast recovery rates, making it suitable for households with high hot water demand. The GSX water heaters are designed with a Foam Insulation System that minimizes heat loss and maximizes energy conservation. Additionally, their innovative design includes a durable glass-lined tank to prevent corrosion, ensuring long-term performance and extended lifespan.

Moving on to the GS6 model, this water heater is characterized by its user-friendly control features, including an adjustable thermostat that allows for precise temperature settings. The GS6 is built with a robust gas control valve that enhances efficiency and helps maintain consistent water temperature. The model is also designed with an anode rod that minimizes corrosion, prolonging the life of the tank. Its standing pilot light system provides reliable ignition, while its compact design makes it suitable for various installation locations, even in tight spaces.

The GPX series stands out in the market with its advanced technological features and sleek design. It integrates smart technologies designed to monitor and optimize performance. The built-in diagnostics programmable control allows users to track system performance and troubleshoot any potential issues easily. The GPX models also come equipped with a high-efficiency condensing gas burner that maximizes energy use, contributing to reduced utility bills. Furthermore, their stainless steel construction adds to their durability and resistance against rust and corrosion.

In summary, State Industries' GSX, GS6, and GPX models represent innovation in the water heating industry. They incorporate energy-efficient technologies, durable materials, and user-friendly controls, making them reliable choices for both residential and commercial applications. With custom features tailored to meet varied needs, these water heaters uphold State Industries' commitment to quality and customer satisfaction, ensuring that users enjoy consistent hot water while being conscious of energy consumption.
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