GSW 72090 manual External Cleaning Flame-arrester, Resetting and Replacing the Safety TCO Switch

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Note: Visually inspect the flame arrester by placing a mirror underneath the water heater. A flashlight can be used to illu- minate the slots in the flame arrester if necessary. Routine cleaning of the flame arrester is recommended if inspection shows accumulation of debris on the flame arrester. See section titled “External Cleaning of the Flame-arrester” for cleaning instructions.

Important: Verify proper operation after servicing this water heater. If you are unsure of this inspection procedure or the proper operation of the water heater and its special safety features, enlist the services of a qualified service technician.

4.Verify if the quick connects are firmly inserted in the TCO switch contacts.

5.Replace the outer door.

6.Restart the water heater following the “Operating Instructions”.

7.If the pilot burner does not stay lit after several attempts it is possible that the TCO embedded in the safety switch opened due to a flammable vapor incident or the TCO switch was severely damaged. Do not attempt to further operate the water heater. Call a qualified service technician.

External Cleaning of the

Flame-arrester

Important: It is recommended that the flame arrester be visually inspected periodically for accumulation of dust, lint and other debris, especially if the heater is installed in areas having a high dust and/or lint content. Any such accumula- tion should be cleaned as outlined below.

1.Use a vacuum cleaner to remove all loose debris in the flame arrester.

2.If necessary, a soft bristle brush can be used to dis- lodge any remaining debris.

3.Repeat step 1 as necessary to completion.

FLAME

ARRESTER

Figure 16 Flame Arrester (External View)

Resetting and Replacing the Safety (TCO) Switch

The water heater safety system includes a door-mount, manual resettable, safety switch which is designed to dis- able the gas control/thermostat in the event of excessive combustion chamber temperatures. The excessive combus- tion chamber temperatures may be generated by accumu- lation of lint and dust on the flame-arrester (located under- neath the combustion chamber),

1.Follow first the procedure outlined in "External Cleaning of the Flame-arrester".

2.Remove the outer door and locate the TCO switch on the right side of the combustion chamber door.

3.Manually press the contact located on the front-right side of the TCO switch (Figure 17) until a click sound is generated. Do not use a metal tool or a screwdriver to press the TCO switch contact.

THERMAL

LINK

TCO

RESET

CONTACT

Figure 17 TCO Switch

Temperature and Pressure Relief Valve

Manually operate the temperature and pressure relief valve at least once a year to make sure it is working properly. To prevent water damage, the valve must be properly connect- ed to a discharge line which terminates at an adequate drain. Standing clear of the outlet (discharged water may be hot), slowly lift and release the lever handle on the temper- ature and pressure relief valve (see Figure 18) to allow the valve to operate freely and return to its closed position. If the valve fails to completely reset and continues to release water, immediately shut off the manual gas shut-off valve and the cold water inlet and call a qualified service techni- cian.

TEMPERATURE AND

PRESSURE RELIEF VALVE

MANUAL RELIEF VALVE

DISCHARGE LINE TO DRAIN

Figure 18 T&P Relief Valve Test

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Contents For Your Safety What to do if YOU Smell GASPage Limited Warranty Viii Troubleshooting GuideIX Repair Parts Illustration Introduction II Safety For Installations in CanadaFor Installations in the United States User ResponsibilitiesSafety Warning Flammable Vapours Safety Warning ScaldingSafety Warning Carbon Monoxide Backflow PreventionEarthquake Zones Clearances and AccessibilityLocation Requirements Result in a Fire Hazard Failure to Properly Install this Heater MAYGas Supply Gas line purging Gas Leak TestingGas Pressure Local Codes Confined Space Air Requirements for Canadian InstallationsAir Requirements Confined Space Air Requirements for Installations Exhaust Venting Water SupplyValve is dripping or leaking, have a Licensed plumber repair itDo not plug valve Do not remove valveDischarge Line Installations CheckTemperature And Pressure Relief Valve IV Operating Instructions Water Temperature Regulation Temperature AdjustmentLighting Instructions Robertshaw 110R What to do if YOU Smell GASLighting Instructions Robertshaw 220R Lighting Instructions White-Rodgers 37C AvantOperation Burner Flames Emergency Shut DownChecking the Draft Operating ConditionsPeriodic Inspection VI MaintenanceDraining and Flushing Temperature and Pressure Relief Valve External Cleaning Flame-arresterResetting and Replacing the Safety TCO Switch VII Combo Heating System RequirementsViii Troubleshooting Guide Problem Possible Causes CorrectionThermostat Fails to Shut IX Repair Parts Illustration Repair PartsLimited Warranty WHO is CoveredHOW the Original Owner can Make a Warranty Claim

72090 specifications

The GSW 72090 is a remarkable addition to the world of modern heating solutions, designed to provide efficient and effective space heating. It epitomizes advanced technology, reliability, and user-centric design, making it an ideal choice for homes and commercial spaces alike.

One of the main features of the GSW 72090 is its impressive heating capacity. Engineered to deliver optimal warmth, it can efficiently heat larger areas, ensuring that spaces remain comfortable even during the coldest months. The unit’s high-grade alloy construction enhances durability and helps maintain consistent performance over time.

A vital technology integrated into the GSW 72090 is its modulating control system. This system intelligently adjusts the temperature output based on the current heating demand, optimizing energy usage and contributing to lower utility bills. This efficiency not only benefits the consumer but also has a positive impact on the environment by reducing greenhouse gas emissions.

The GSW 72090 also boasts a sleek and modern aesthetic, making it an attractive addition to any space. Its design allows for easy installation and maintenance, ensuring that users can focus on comfort without worrying about the complexities of upkeep. The unit operates quietly, providing a peaceful environment without the disruptive noises often associated with traditional heating systems.

Incorporating safety features is another key characteristic of the GSW 72090. It includes overheat protection, which automatically turns the unit off if it detects excessive temperatures, ensuring a safe environment for occupants. Additionally, the product is constructed with materials that are resistant to corrosion and wear, enhancing longevity.

As an environmentally conscious option, the GSW 72090 is designed to comply with stringent energy efficiency regulations. Its performance not only meets but often exceeds the required standards, making it a smart choice for those looking to reduce their carbon footprint.

Overall, the GSW 72090 stands out due to its combination of advanced technologies, user-friendly features, aesthetic appeal, and commitment to safety and efficiency. Its multi-faceted capabilities make it a prime option for anyone seeking reliable and effective heating solutions in their home or business.
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