Thermo Products OHFA199DV5B, OHFA199DV5R Draft Regulators, Duct WORK/AIR Conditioning

Page 14

C. DRAFT REGULATORS:

Note: Do not use with Direct Vent application.

A draft regulator is supplied with the furnace and should be installed according to the regulator manufacturers recommendations. With the burner operating, use a draft gauge to adjust the regulator to the proper setting. (refer to the instructions enclosed with draft regulator to adjust to the proper setting). When the burner air supply and draft are properly adjusted, the over fire draft should be a negative (-).01" to (-).02" WC, as measured at the 5/16" over fire air tap (See Fig. 12). This tap is provided in the upper burner mounting plate. To measure the flue draft, punch a small hole in the vent connector pipe as close to the furnace as possible and always before the draft regulator.

Note: Draft over fire may be positive for high fire applications but not to exceed (+).02" WC.

D. DUCT WORK/AIR CONDITIONING:

If the furnace is used in connection with summer air conditioning (cooling), the furnace should be installed parallel with or on the upstream side of the evaporator coil to avoid condensation in the furnace heat exchanger. If the cooling unit is installed with a parallel flow arrangement, dampers or other means used to control flow of air should be provided to prevent chilled air from entering the furnace. If such a damper is manually operated, it must be equipped with a means to prevent operation of either unit, unless the damper is in the full heat or cool position.

The duct system should again follow the current design standard of Air Conditioning Contractors of America (ACCA) or ASHRAE Fundamentals volume. The most common location for the A-shaped coil (A style) is shown in Fig. 8.

Fig 8: Acceptable locations for the air conditioner evaporator coil.

NOTICE: The minimum coil pan clearance for a sectional or drum type heat exchanger is three inches unless specified otherwise by the individual coil manufacturer.

NOTICE: The minimum return air temperature is 55° F.

Airflow Requirements and Sizing of Duct Work:

The duct system must be sized and installed by a qualified installer or service person, following the design standards of the Air Conditioning Contractors of America (ACCA) or the American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE). This furnace has been designed to operate against a maximum external static pressure of 0.5 in. W.G. This is equivalent to 0.1 in. W.G. supply, and 0.1 in. W.G. return, and 0.3 in. W.G. for evaporator coil.

11

Page 13 Page 15
Image 14
Page 13 Page 15
Contents OH6FA072DV4N OH6FX072DV4R OH6FA072DV4BOH6FA072DV4R Contents = Highboy D = Downflow = FrontCAUTION do not Attempt to Start the Burner When Safety SectionWARNING and Cautions 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 HeightNo Interconnected Chimney Flues Tight CLEAN-OUT Doors and ConnectionsTight Joints Flue Pipe CLEARANCES, Sizing and TypeReduction of Clearances with Specified Forms of Protection Venting Airflow Requirements and Sizing of Duct Work Draft RegulatorsDuct WORK/AIR Conditioning Page Page Supply air duct sizing Example Air Filter Mounted External to Furnace ExamplesA typical filter rack and dimensions for the OH6 furnace OH6 OH8 Limit Position and LocationMaximum Filter Type Air Velocity Model Number Ft/min 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 WiriingOH8FA119DV5 Electronic Air Cleaner EAC and Humidifier InstallationOH6FA072DV5 Thermostat Anticipator Setting Fan Control ModulePreferred method of adjustment Heat Anticipator Adjustment ScaleBlower Motor Speed Selection Furnace Motor Current Heating Speed Set-upsOH6FA072DV4 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 FeaturesOperating Instructions Startup ProceduresSTOP! Read the safety information above 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 Left Sign AIR Damper AdjustmentTurn to the Right Sign + 1st Stage Adjustment 2nd Stage AdjustmentAdjustment Of Heat Input Rate Page Checkout Procedure  Caution do not Attempt to Make Repairs Yourself III. Users Information SectionInspection Areas Filter Cleaning and Location Starting the BurnerIV. Installers Instructions to User General Inspection Dealer MaintenanceSafety During Servicing and Inspection Heat Exchanger OH6 8FT OH8 8FT SUPPLY/RETURN AIR Blower Filter maintenance procedureElectrical System SUPPLY/RETURN AIR FilterOn Shutdown Filter replacementExtended Appliance Shutdown VI. HOMEOWNER/USER Information and Routine Maintenance On StartupLocation of oil primary control reset button Beckett BurnerPage CAD Cell Checkout Procedure DiagnosticsDiagnostic Features 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
Top Page Image Contents