Thermo Products OHFA199DV5R, OHFA199DV5B operation manual Heat Exchanger

Page 55

B. HEAT EXCHANGER:

WARNING: A qualified heating contractor must clean the heat exchanger.

At least once a year, inspect the heat exchanger for evidence of corrosion, pitting, warpage, deterioration, and carbon (soot) build-up. A layer of soot on the inside of the heat exchanger will act as an insulator and reduce heat transfer, resulting in less heating efficiency.

Also, look for loose or deteriorated gaskets and insulation around the flue pipe, the burner, and accessible areas of the heat exchanger. If this inspection indicates heat exchanger cleaning is necessary, follow the heat exchanger cleaning instructions below.

C. HEAT EXCHANGER CLEANING INSTRUCTIONS:

WARNING: THE HEAT EXCHANGER MUST BE CLEANED BY A QUALIFIED SERVICE PERSON.

It is important to inspect and clean the heat exchanger once a year, or as necessary, to remove any build- up of soot. A layer of soot on the inside of the heat exchanger will act as an insulator and reduce heat transfer, resulting in less efficiency.

1.To clean the heat exchanger, first turn off all power to the unit. Remove clean-out plugs, the vent connector pipe to the chimney, the burner, and the burner mounting plates. When removing the clean-out plugs, turn T-handle counterclockwise approximately two (2) full turns or just until the plug is able to be pulled from tube. Take care not to remove T-handle from assembly.

2.With access to the inside of the heat exchanger through the burner area, clean-out openings, and vent pipe connection, it is possible to use a long, flexible wire brush and an industrial type vacuum cleaner to remove any soot build-up. NOTE: A one inch (outside diameter) vacuum cleaner hose will fit into the radiator.

To vacuum and brush the outer radiator of the heat exchanger, go through the clean-out openings in both directions, as shown in figure 25 on the next page.

3.Reassemble the furnace to its original construction*. Remount the burner being certain that the air tube is properly inserted into the chamber opening. If heavy soot deposits were found in the heat exchanger, this may indicate the burner is out of adjustment.

*When returning clean-out plugs to their original position, insert plug and turn T-handle clockwise 2-3 turns or until plug cannot be pulled from the clean-out access tube. This is sufficient for sealing the access tube.

Replace any damaged or corroded components. All gaskets and insulation must be inspected, and replaced, if they show any signs of damage.

52

Page 54 Page 56
Image 55
Page 54 Page 56
Contents OH6FA072DV4R OH6FA072DV4BOH6FA072DV4N OH6FX072DV4R Contents = Front = Highboy D = DownflowWARNING and Cautions Safety SectionCAUTION do not Attempt to Start the Burner When Page Combustible material Codes and ClearancesNon-combustible material Highboy II. General Instructions Read Before Start of InstallationPrevention of Chimney Condensing ChimneyProper Chimney Height Proper Vent Connector PIPE/CHIMNEY ConnectionFlue Pipe CLEARANCES, Sizing and Type Tight CLEAN-OUT Doors and ConnectionsTight Joints No Interconnected Chimney FluesReduction of Clearances with Specified Forms of Protection Venting Duct WORK/AIR Conditioning Draft RegulatorsAirflow Requirements and Sizing of Duct Work Page Page Supply air duct sizing Example Examples Air Filter Mounted External to FurnaceA typical filter rack and dimensions for the OH6 furnace Maximum Filter Type Air Velocity Model Number Ft/min Limit Position and LocationOH6 OH8 Do not remove this retainer when installing burner Burner InstallationDo not Change Position of the Chamber Burner Specifications and ApplicationsBTU/HR Beckett RielloBTU/HR Heating Capacity Mounting the 2-STAGE Riello BurnerOIL Tank and Piping Electrical Wiriing OIL FilterOH6FA072DV5 Electronic Air Cleaner EAC and Humidifier InstallationOH8FA119DV5 Fan Control Module Thermostat Anticipator SettingHeat Anticipator Adjustment Scale Preferred method of adjustmentBlower Motor Speed Selection Draw Amps/ / Watts vs Heating Speed Set-upsOH6FA072DV4 Furnace Motor Current1A ECM blower motor speed chart OH6FX072DV4 Heating Speed Set-ups 2 StageCooling blower motor speed chart Draw Amps/Watts vs Cooling Speed Set-upsHigh OH6FA072D48HTG Speed by Input Blower Controller Information for PSC Motor Terminal Definitions & Field WiringOutputs InputsOperating Modes On and OFF Blower Delay Time Switch Settings Diagnostic Features PSC Trouble ShootingSTOP! Read the safety information above Startup ProceduresOperating Instructions To Turn Off Oil to Appliance Adjustment of Burner CombustionPreliminary Adjustment of Burner Air Band and Air Shutter Combustion Head Setting for 2-STAGE Riello BurnerTurn to the Right Sign + AIR Damper AdjustmentTurn to the Left Sign 2nd Stage Adjustment 1st Stage AdjustmentAdjustment Of Heat Input Rate Page Checkout Procedure Inspection Areas III. Users Information Section Caution do not Attempt to Make Repairs Yourself Starting the Burner Filter Cleaning and LocationIV. Installers Instructions to User Safety During Servicing and Inspection Dealer MaintenanceGeneral Inspection Heat Exchanger OH6 8FT OH8 8FT SUPPLY/RETURN AIR Filter Filter maintenance procedureElectrical System SUPPLY/RETURN AIR BlowerExtended Appliance Shutdown Filter replacementOn Shutdown On Startup VI. HOMEOWNER/USER Information and Routine MaintenanceBeckett Burner Location of oil primary control reset buttonPage Number of flashes Cad Cell Resistance in ohms Model R7184B DiagnosticsDiagnostic Features CAD Cell Checkout ProcedurePage VIII. Sequence of Operations Flow Chart Page IX. Trouble Shooting Flow Chart Page Page Page Page Customer Appendix a Replacement Parts Replacement Parts for OH8FA119D Appendix B Wiring Diagrams OH6FA072DV4 ECM Wiring Diagram OH6FX072DV4 ECM 2-Stage Wiring Diagram OH8FA1119D60 PSC Wiring Diagram OH8FA1119DV5 ECM Wiring Diagram
Top Page Image Contents