Allied Air Enterprises 80G1UH High Altitude, Manifold Pressure Settings and Pressure Switch

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High Altitude

High Altitude

The manifold pressure may require adjustment to ensure proper combustion at higher altitudes. Refer to Table 12 for manifold pressure and pressure switch change.

Manifold Pressure Settings and Pressure SwitchOther Unit Adjustments IMPORTANT

For Safety, shut unit off and remove manometer as soon as an accurate reading has been obtained. Take care to replace pressure tap plug.

Manifold Pressure Settings and Pressure Switch

NOTE: A natural to L.P. propane gas changeover kit is necessary to convert this unit. Refer to the changeover kit installation instruction for the conversion procedure.

NOTE: For Altitudes of 7501' - 10,000' call Lennox Technical Support Product Applications.

Table 12

Other Unit Adjustments

Primary and Secondary Limits

The primary limit is located on the heating compartment vestibule panel. The secondary limits (if equipped) are located in the blower compartment, attached to the back side of the blower. These auto reset limits are factory set and require no adjustment.

Flame Rollout Switches

This manually reset switches are located on the top of the burner box.

Pressure Switch

The pressure switch is located in the heating compartment adjacent to the combustion air inducer. The switch checks for proper combustion air inducer operation before allowing ignition trial. The switch is factory set and requires no adjustment.

Temperature Rise

After the furnace has been started, and supply and return air temperatures have been allowed to stabilize, check the temperature rise. If necessary, adjust the blower speed to maintain the temperature rise within the range shown on the unit nameplate. Increase the blower speed to decrease the temperature. Decrease the blower speed to increase the temperature rise. Failure to adjust the temperature rise may cause erratic limit operation.

Fan Control

The fan on time of 45 seconds is not adjustable. The heat fan off delay (amount of time that the blower operates after the heat demand has been satisfied) may be adjusted by changing the jumper position across the five pins on the integrated control. The unit is shipped with a factory fan off delay setting of 90 seconds. The fan off delay affects comfort and is adjustable to satisfy individual applications. Adjust the fan off delay to achieve a supply air temperature between 90° and 110° F at the moment that the blower is deenergized. Longer off delay settings provide lower return air temperatures; shorter settings provide higher return air temperatures. See Figure 37.

HEAT FAN OFF TIME IN SECONDS

Figure 37

506526-01

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Contents Warm Air Gas Furnace TABLE OF CONTENTSINSTALLATION INSTRUCTIONS A80UH & 80G1UHFRONT VIEW A80UH & 80G1UH Unit Dimensions - inches mmSIDE VIEW 506526-01 A80UH & 80G1UHA80UH & 80G1UH Gas Furnace Safety InformationInstalled Locations DANGERUse of Furnace as a Construction Heater Installed in Combination with a Cooling CoilHeating Unit Installed Upstream of Cooling Unit Temperature Rise215 Metropolitan Drive West Columbia, SC GeneralProduct Contains Fiberglass Wool Allied Air Enterprises, IncFigure Air from Inside Unconfined SpaceConfined Space Equipment in Confined Space - All Air From InsideEQUIPMENT IN CONFINED SPACE Upflow Application Installation Clearances Setting EquipmentUpflow Applications 5.Bottom and one side return air Return Air - Upflow Applications1800 cfm 850 L/s must have one of the following 3.Bottom return air 4.Return air from both sidesHorizontal Applications Horizontal Application Installatioin clearancesRemoving the Bottom Panel Removing the Bottom Panel FigureSupply Air Plenum Horizontal Application Unit installed on PlatformFilters Table Duct SystemFigure UPFLOW POSITION VentingMounting Screws Location Figure UPFLOW POSITION UPFLOW POSITIONHORIZONTAL RIGHT POSITION Horizontal PositionHORIZONTAL LEFT POSITION Figure HORIZONTAL LEFT POSITIONIssue Venting Using a Masonry ChimneyCommon Venting Using Metal Lined Masonry Chimney Vent Connection FigureGeneral Venting Requirements Page 17 of Issue506526-01 Serving a Single Category I ApplianceIssue Page 18 of506526-01 Serving a Single Category I ApplianceIssue Page 19 ofServing Two or More Category I Appliances Vent Connector CapacityServing Two or More Category I Appliances Common Vent CapacityServing Two or More Category I Appliances Table Common Vent CapacityServing Two or more Category I Appliances Table Vent Connector CapacityPage 22 of Removal of the Furnace from Common VentCARBON MONOXIDE POISONING HAZARD IssueIssue Gas PipingGas Supply Gas Pipe Capacity - ft³/hr m³/hrPage 24 of Possible Gas Piping ConfigurationsFigure Horizontal Applications IssueINTERIOR MAKE-UPBOX INSTALLATION Figure INTERIOR MAKE-UPBOX INSTALLATION FigureLeak Check Figure Electrical ELECTROSTATIC DISCHARGE ESDCondensing Unit Thermostat Designations Accessory TerminalsGenerator Use - Voltage Requirements Thermostat506526-01 Wiring Diagram FigureIssue Page 27 ofIntegrated Control Typical Field Wiring Diagram FigureAutomatic Hot Surface Ignition System Gas Valve Operation Figure FOR YOUR SAFETY READ BEFORE LIGHTING UNITUnit Start-UP Placing the Furnace into OperationManifold Pressure Measurement Gas Pressure Adjustment Gas Flow ApproximateHeating Sequence Of Operation Figure Supply Pressure MeasurementPressure Switch Manifold Pressure Settings and Pressure SwitchOther Unit Adjustments Flame Rollout SwitchesElectronic Ignition Thermostat Heat AnticipationElectrical Blower SpeedsFlue And Chimney ServiceELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD Blower506526-01 Cleaning the Heat Exchanger and BurnersIssue Page 34 ofNOx INSERTS Figure Remove 5 Screws If NecessaryPage 36 of PLANNED SERVICEFAILURE CODES IssueControl Panel REPAIR PARTS LISTCabinet Parts Heating Parts506526-01 START-UP& PERFORMANCE CHECK LIST UNIT SET UPIssue Page 38 of506526-01 IssueUNIT OPERATION Page 39 of
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