Carlin G3B Instruciton Manual
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Contents
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Model G3B Gas burner — Instruction manualMNG3B Gas 04101517Annual start-up & serviceThis burner should be started and serviced at least annuallyby a qualified service technician. Failure to properly maintainand service the burner could result in severe personal injury,death or substantial property damage.Turn off power to appliance and close main manual gasvalve when servicing burner. See WARNINGS on page 2and elsewhere in this manual regarding correct procedures.Failure to comply could result in severe personal injury, deathor substantial property damage.❏ Discuss burner/appliance operation with user to determine any prob-lems that may have occurred during the previous season and to verifyuser is aware of proper operation and care of the burner/appliance.❏ Turn off power to appliance and close main manual gas valve.❏ Remove burner from appliance and inspect flame holder, hot surfaceignitor and burner components.❏ Inspect ignitor and ignition tube assembly.1. The hot surface ignitor (HSI) is a silicon carbide element that performs dualfunctions of ignition and flame detection. On a call for heat, the ignitoris powered with 120 vac and is electrically heated to about 2600°F. Thisignites the gas/air mixture when the primary control energizes the gasvalve.2. The primary control then switches the HSI to the flame detector circuit,using flame rectification to monitor the flame.3. The ignitor is positioned in the ignition tube assembly against a factory-set non-adjustable stop ring for proper ignition and flame sensing.4. To inspect the HSI, first be sure the 120 vac power supply to burner isdisconnected. Then slide the two silicone insulating boots off of theinsulators.5. Pull off the quick-disconnect terminals.6. Remove the four #8-32 screws securing the air tube back plate.6. Maintenance and Service Procedures7. Swing the hold-on bracket away and carefully pull out the ignition tubeassembly.As the white ceramic is exposed, support it using a rag. Itcould be HOT. Do not let the hot surface ignitor element bumpinto anything. Do not drop the assembly or ignitor element.The element is very fragile. Even a small hairline fracture willdestroy the HSI.8. If the ignitor element is damaged in any way, replace it with a newone.9. If replacing the ignition tube assembly in the burner, replace the backplate gasket with a new one. Replace the hold-on bracket and screws.Ensure the back plate gasket is sealed gas-tight to the burner air tube.❏ Inspect and clean flameholder.1. Remove the ignition tube assembly from the burner as described in thesteps for inspecting the hot surface ignitor.2. Reach in and, with one finger through the center hole of the flameholder,pull the flameholder out of the burner air tube.3. Use a small brush to remove dirt and lint from the inside surface of theflameholder. All holes must be clean and unobstructed.4. If the flameholder is damaged, dented or defective in any way, replaceit with a new one.5. Replace the flameholder in the air tube.6. Replace the ignition tube assembly as described in the steps for inspectingthe hot surface ignitor. Be sure to install a new back plate gasket andseal assembly to air tube gas-tight.7. Follow the instructions on page 8 to inspect the hot surface ignitor.If the inside surface of the air tube needs to be cleaned,clean with a vacuum cleaner with brush attachment whilethe ignition tube assembly is out of the burner.❏ Check the burner flange gasket. It must be in good condition. Replacegasket on burner flange and mount burner in appliance, securing tomounting studs.❏ Perform the complete checkout procedures of pages 12 through 17,including system inspection and checks.Annual start-up & service (continued) |
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