Thermo Products OH6FX072DV4R, OH8FA119DV5R, OH8FA119D60R, OH6FA072D48B, OH6FA072D48N Inputs, Outputs

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A. Inputs

Power supplies

Line voltage is applied between the “S1” and “N1” quick connect terminals. 24 VAC Class II Transformer secondary voltage supplied to X and C

Limit switch

The 120 VAC optically isolated limit switch input is connected on pin P2-1 & 9. Refer to the Heat Mode section for the control operation.

Thermostat call for heat “W”

24 VAC thermostat input. A call for heat is recognized when the thermostat connects “W” to “R”. This input has an indicator LED that will light when the control receives a call for heat. Refer to the Heat Mode section for the control operation.

Thermostat call for cool, “Y”

24 VAC thermostat input. A call for cooling is recognized when the thermostat connects “Y” to “R”. This input has an indicator LED that will light when the control receives a call for cooling. Refer to the Cool Mode section for the control operation.

Thermostat call for dehumidification “DEHUM”

24 VAC thermostat input. A call for dehumidification is recognized when the humidistat connects “DEHUM” to “R”. This input has an indicator that will light when the control receives a call for dehumidification. Refer to the Cool Mode section for the control operation.

Thermostat call for fan “G”

24 VAC thermostat input. A call for fan is recognized when the thermostat connects “G” to “R”. This input has an indicator LED in that will light when the control receives a call for fan. Refer to the Fan Mode section for the control operation.

B. Outputs

PSC Control

The control shall control a five-speed indoor blower motor. Rating shall be 10 FLA, 30 LRA @ 120 VAC. Connections are made via 0.250 x 0.032” male quick connect terminals labeled “HEAT”, “COOL”, and “LOW”. “HEAT” is energized when the heat speed blower is to run. “COOL” is energized when the Cool speed blower is to run. “LOW” is energized during a call for fan is received or a call for dehumidification is received.

Oil Burner

Control

The control provides dedicated contacts to operate the T-T input of an oil primary control. Rating shall be class 2 – 24 VAC pilot duty @ 24 VAC (<200mA).

Power

The switched 120 VAC power from the LIMIT switch passes through the board between Pins 1 & 2 of connector P1.

Compressor contactor

The control provides switched 24VAC to operate a compressor contactor. Rating shall be class 2 – 24 VAC pilot duty @ 24 VAC (<200mA).

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Contents OH6FA072DV4B OH6FA072DV4ROH6FA072DV4N OH6FX072DV4R Contents = Front = Highboy D = DownflowSafety Section WARNING and Cautions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 Draft Regulators Duct WORK/AIR ConditioningAirflow 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 Limit Position and Location Maximum Filter Type Air Velocity Model Number Ft/minOH6 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 FilterElectronic Air Cleaner EAC and Humidifier Installation 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 CurrentCFM OH8FA119DV560,000 72,000 90,000 Heating Approx Switch CFM/RISE SettingsHeating Speed Set-ups 2 Stage OH6FX072DV4Cooling blower motor speed chart Draw Amps/Watts vs Cooling Speed Set-upsHigh OH6FA072D48969 OH8FA119D60Blower Controller Information for PSC Motor Terminal Definitions & Field WiringOutputs InputsOperating Modes On and OFF Blower Delay Time Switch Settings Diagnostic Features ECM & PSC Trouble ShootingStartup Procedures STOP! Read the safety information aboveOperating 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 BurnerAIR Damper Adjustment Turn to the Right Sign +Turn to the Left Sign 2nd Stage Adjustment 1st Stage AdjustmentAdjustment Of Heat Input Rate Page Checkout Procedure III. Users Information Section Inspection Areas Caution do not Attempt to Make Repairs Yourself Starting the Burner Filter Cleaning and LocationIV. Installers Instructions to User Dealer Maintenance Safety During Servicing and InspectionGeneral Inspection Heat Exchanger OH6 8FT OH8 8FT SUPPLY/RETURN AIR Filter Filter maintenance procedureElectrical System SUPPLY/RETURN AIR BlowerFilter replacement Extended Appliance ShutdownOn 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
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OH6FA072D48R, OH8FA119D60B, OH6FA072DV4B, OH8FA119DV5B, OH6FX072DV4R specifications

Thermo Products has established a reputation for delivering high-quality heating solutions tailored for various applications. Among their standout offerings are the OH8FA119DV5R, OH8FA119D60R, OH6FA072D48B, OH6FA072D48N, and OH6FA072DV4N models. These units are engineered with precision and incorporate advanced technologies to deliver reliable performance in residential and commercial settings.

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