Thermo Products OHFA199DV5B, OHFA199DV5R operation manual Operating Modes

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EAC (electronic air cleaner)

The control provides a 120 VAC output for an electronic air cleaner. This output is energized whenever the fan motor is energized (either low, heat or cool speed). Connection is made via male quick connect terminal labeled “EAC”.

Humidifier

The control provides a 120 VAC output for a humidifier. Connections are made to a male quick connect terminal labeled “FAN”. The control does not switch this output, it provides a pass-through connection from P1-7 from the switched primary voltage of the Burner Module.

Status LED

A red LED is provided to indicate any thermostat input has been recognized by the microprocessor on the control. See Diagnostic Features for a function description of operation.

Thermostat Input LEDs

Four green LEDs are placed beneath their respective thermostat connections (W, Y, G and DEHUM) and operate whenever a call is present. See Diagnostic Features for a function description of operation.

C. Operating Modes

Standby Mode

All outputs are off and the control is waiting for a thermostat demand. The thermostat inputs, and limit switch are continuously monitored. The control initiates action when a thermostat call is received or limit switch opens.

Fan Mode

A call for fan (“G”) is received from the thermostat. If no other mode is calling for blower operation, the control will operate the fan relay (K4) and power the “Low” blower speed terminal. The fan mode will be operated as long as the “G” input is calling and neither the Heat mode nor the Cool mode is calling for blower operation. When the Heat and Cool modes call for blower operation, their respective outputs will take precedence after their respective turn-on time delays have expired.

Cooling Mode

A call for cool (“Y”) is received from the thermostat. If the heat mode is not active or the anti-short cycle delay is not in effect, the control will energize the “CC” terminal and after a 10 second power demand conservation delay energizes the “COOL” speed blower terminal.

When the call for cool is satisfied, the “CC” terminal is de-energized and the cooling off delay of 45 seconds is started. Forty-five seconds later the “COOL” speed blower terminal is de-energized and the control reverts to Standby Mode.

Dehumidification Operation

If a call for dehumidification is received while the Cool Mode is active, blower speeds will be reduced. The PSC “COOL” blower speed terminal (1158-100 model only) will be de-energized and “Low” blower speed will be energized.

Anti-Short Cycle Operation

To prevent compressor short cycling, a call for cooling will be ignored for four minutes after the termination of any cooling call. The anti-short cycle delay is also in effect at power-up.

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Contents OH6FA072DV4R OH6FA072DV4BOH6FA072DV4N OH6FX072DV4R Contents = Highboy D = Downflow = FrontWARNING and Cautions Safety SectionCAUTION do not Attempt to Start the Burner When Page Codes and Clearances Combustible materialNon-combustible material II. General Instructions Read Before Start of Installation HighboyChimney Prevention of Chimney CondensingProper Vent Connector PIPE/CHIMNEY Connection Proper Chimney HeightTight CLEAN-OUT Doors and Connections Tight JointsNo Interconnected Chimney Flues Flue Pipe CLEARANCES, Sizing and TypeReduction 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 Air Filter Mounted External to Furnace ExamplesA typical filter rack and dimensions for the OH6 furnace Maximum Filter Type Air Velocity Model Number Ft/min Limit Position and LocationOH6 OH8 Burner Installation Do not remove this retainer when installing burnerBurner Specifications and Applications Do not Change Position of the ChamberBeckett Riello BTU/HRMounting the 2-STAGE Riello Burner BTU/HR Heating CapacityOIL Tank and Piping OIL Filter Electrical WiriingOH6FA072DV5 Electronic Air Cleaner EAC and Humidifier InstallationOH8FA119DV5 Thermostat Anticipator Setting Fan Control ModulePreferred method of adjustment Heat Anticipator Adjustment ScaleBlower Motor Speed Selection Heating Speed Set-ups OH6FA072DV4Furnace Motor Current Draw Amps/ / Watts vs1A ECM blower motor speed chart Heating Speed Set-ups 2 Stage OH6FX072DV4Cooling blower motor speed chart Cooling Speed Set-ups Draw Amps/Watts vsOH6FA072D48 HighHTG Speed by Input Terminal Definitions & Field Wiring Blower Controller Information for PSC MotorInputs OutputsOperating Modes On and OFF Blower Delay Time Switch Settings PSC Trouble Shooting Diagnostic FeaturesSTOP! Read the safety information above Startup ProceduresOperating Instructions Adjustment of Burner Combustion To Turn Off Oil to ApplianceCombustion Head Setting for 2-STAGE Riello Burner Preliminary Adjustment of Burner Air Band and Air ShutterTurn to the Right Sign + AIR Damper AdjustmentTurn to the Left Sign 1st Stage Adjustment 2nd Stage AdjustmentAdjustment Of Heat Input Rate Page Checkout Procedure Inspection Areas III. Users Information Section Caution do not Attempt to Make Repairs Yourself Filter Cleaning and Location Starting the BurnerIV. Installers Instructions to User Safety During Servicing and Inspection Dealer MaintenanceGeneral Inspection Heat Exchanger OH6 8FT OH8 8FT Filter maintenance procedure Electrical SystemSUPPLY/RETURN AIR Blower SUPPLY/RETURN AIR FilterExtended Appliance Shutdown Filter replacementOn Shutdown VI. HOMEOWNER/USER Information and Routine Maintenance On StartupLocation of oil primary control reset button Beckett BurnerPage Diagnostics Diagnostic FeaturesCAD Cell Checkout Procedure Number of flashes Cad Cell Resistance in ohms Model R7184BPage 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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