RBI FUTERA III Series HeatNet Installation & Operation Manual

Also see for FUTERA III MB-1000: Installation & operation manual

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RBI FUTERA III Series HeatNet Installation & Operation Manual Manual pdf 32 page image

FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS32RETURN TEMP < 130°F: If the Return Inlet temperatureis less than 130°F this warning will be displayed. Thiswarning does not affect operation and does not set thealarm relay. A log entry is made to aide in diagnosingwhy this may be occuring. Condensing will occur withreturn temperatures below 130°F and a shortened heatexchanger life will occur.PREPURGERETURN TEMP < 130°FLOCAL SET41˚FMAINTENANCEWARNING: Disconnect electrical power and closethe manual gas shut off valve before performingmaintenance or severe personal injury mayresult!CAUTION: Servicing, inspection and adjustment mustbe done by a trained technician in accordance with allapplicable local and national codes. Improper servicingor adjustment can damage the boiler/water heater!The boiler/water heater must be cleaned and inspected atleast once a year and before each heating season. Makesure that the burner and ignition components are free fromdust, soot, dirt, corrosion or other deposits that wouldimpair the boiler/water heater ‘s performance. Refer toFigure 19 for component identification.CAUTION: Improper burner servicing can result inpremature burner failure voiding the warranty!Burner Removal1. Close the manual shutoff valves in the gas supply lineand turn off electrical power to the boiler/water heater.2. Remove the jacket top panel.3. Disconnect the wires to the fan and remove the fourbolts that secure the fan to the transition piece.4. Remove wires from the spark rods and remove the UVsense from the transition piece.5. Disconnect the compression nut at the back of thetransition piece to remove pilot gas tubing.6. Remove the four nuts holding the transition piece to theheat exchanger.7. Lift and remove the transition piece and burner togetherfrom the boiler/water heater, taking care not to damagethe spark rods and or their alignment.8. Disconnect the compression nut from the inside of thetransition piece.9. Remove the transition piece, taking care not to damagethe spark rods and or their alignment.Heat Exchanger Inspection1. Close the manual shutoff valves in the gas supply linesand turn off electrical power to the boiler/water heater.2. Remove burner following the instructions in the BurnerRemoval section.3. Remove the front jacket panel and combustion chamberdoor.4. Inspect the inside and outside of the heat exchangerfor signs of damage, sooting or corrosion.5. The outside surfaces of the copper tubes should be freeof any soot deposits. A slight black smudge is normal withsome types of gases. Black soot indicates poorcombustion. Green deposits indicate condensation dueto low return water temperatures. In either case the heatexchanger must be cleaned thoroughly and the problemresolved before the boiler/water heater is returned toservice.6. If there are no signs of damage, sooting or corrosion,reassemble the unit following the previous steps inreverse order.7. A badly corroded or damaged heat exchanger mustbe replaced, see the Heat Exchanger Repair &Replacement section.Heat Exchanger Cleaning1. Close the shut off valves in the inlet and outlet piping.On heating systems close the system fill valve andrelieve the system pressure from the boiler by carefullylifting the relief valve or opening the drain valve.2. Disconnect the boiler/water heater from the systempiping.3. Remove the eight bolts on the rear pipe enclosurepanel.4. Remove the front jacket panel and combustionchamber door.5. Slide the heat exchanger out of the unit.6. Remove the “V” baffle straps and “V” baffles.7. Thoroughly clean the heat exchanger with water froma high-pressure hose. Use a soft bristle brush ifnecessary.8. Replace the cleaned heat exchanger and othercomponents in the reverse order of their removal.