Allied A97USMV Specifications

506887-01 Page 1 of 78Issue 1213As with any mechanical equipment, personal injury canresult from contact with sharp sheet metal edges. Becareful when

506887-01Page 10 of 78 Issue 1213Setting and Upflow UnitWhen the side return air inlets are used in an upflowapplication, it may be necessary to insta

506887-01 Page 11 of 78Issue 1213Return Air - Horizontal ApplicationsReturn air must be brought in through the end of a furnaceinstalled in the horizo

506887-01Page 12 of 78 Issue 1213Pipe and Fittings SpecificationsAll pipe, fittings, primer and solvent cement must conformwith American National Stan

506887-01 Page 13 of 78Issue 1213Joint Cementing ProcedureAll cementing of joints should be done according to thespecifications outlined in ASTM D2855

506887-01Page 14 of 78 Issue 1213Removal of the Furnace from Common VentIn the event that an existing furnace is removed from aventing system commonly

506887-01 Page 15 of 78Issue 1213NOTE: The exhaust collar on all models is sized toaccommodate 2” Schedule 40 vent pipe. In horizontalapplications,

506887-01Page 16 of 78 Issue 1213Figure 17

506887-01 Page 17 of 78Issue 1213Table 5Maximum Allowable Intake or Exhaust Vent Length (feet) Standard Termination at Elevation 0 - 7500 f t

506887-01Page 18 of 78 Issue 1213TYPICAL EXHAUST AND INTAKE PIPE CONNECTIONSIN UPFLOW APPLICATIONSFigure 18Figure 19TYPICAL EXHAUST AND INTAKE PIPE CO

506887-01 Page 19 of 78Issue 1213VENT TERMINATION CLEARANCESFOR DIRECT VENT INSTALLATiONS IN THE USA AND CANADAFigure 20

506887-01Page 2 of 78 Issue 1213Unit Dimensions - inches (mm)* NOTE - C/D20 size units that require second stage air volumesover 1800 cfm (850 L/S) mu

506887-01Page 20 of 78 Issue 1213Table 6Maximum Allowable Vent pipe Length without Insulation in Unconditioned Space for Winter DesignTemperatures Mod

506887-01 Page 21 of 78Issue 1213NOTE: Care must be taken to avoid recirculation of exhaustback into intake pipe.Details of Intake and Exhaust Piping

506887-01Page 22 of 78 Issue 1213FIELD SUPPLIED WALL TERMINATION ORSee venting Table 5 for maximum venting lengths with thisarrangement.* Use wall sup

506887-01 Page 23 of 78Issue 12135. On field supplied terminations for sidewall exit, exhaustpiping may extend a maximum of 12 inches (305 mm)for 2” P

506887-01Page 24 of 78 Issue 1213DIRECT VENT CONCENTRIC WAL TERMINATION71M80, 69M29 OR 60L46 (US)44W92 or 44W93 (Canada)Figure 27Figure 28FLUSH-MOUNT

506887-01 Page 25 of 78Issue 12131. Determine which side condensate piping will exit theunit, location of trap, field-provided fittings and length ofP

506887-01Page 26 of 78 Issue 1213A separate drain line must be run to the drain from thecondensate trap. DO NOT connect the condensate trapdrain into

506887-01 Page 27 of 78Issue 1213When combining the furnace and evaporator coil drainstogether, the A/C condensate drain outlet must be ventedto relie

506887-01Page 28 of 78 Issue 1213Trap / Drain Assembly using 1/2” PVC or 3/4” PVCFigure 38

506887-01 Page 29 of 78Issue 1213Gas Piping1. Gas piping may be routed into the unit through eitherthe left or right hand side in upflow applications,

506887-01 Page 3 of 78Issue 1213A97USMV Exploded ViewFigure 1

506887-01Page 30 of 78 Issue 1213Figure 36NOTE: BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINETHorizontal ApplicationsPossible Gas Piping Configu

506887-01 Page 31 of 78Issue 1213GAS PIPE CAPACITY - FT³/HR (kL/HR)NOTE: Capacity given in cubic feet of gas per hour (kilo liters of gas per hour) a

506887-01Page 32 of 78 Issue 1213ElectricalELECTROSTATIC DISCHARGE (ESD)Precautions and ProceduresFigure 38INTERIOR MAKE-UP BOX INSTALLATIONFigure 39I

506887-01 Page 33 of 78Issue 12138. One line voltage “HUM” 1/4” spade terminal is providedon the furnace integrated control. Any humidifier or other1

506887-01Page 34 of 78 Issue 1213Typical A97USMV Field Wiring Diagram for Standard Non-Communicating ThermostatFigure 44

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506887-01Page 36 of 78 Issue 1213Figure 46

506887-01 Page 37 of 78Issue 1213Thermostat DIP Switch Settings and On-Board Links (figure NO TAG) Wiring Connections DIP Switch 1 W915 (Y1 to Y2) T

506887-01Page 38 of 78 Issue 1213Thermostat DIP Switch Settings and On-Board Links (figure NO TAG) Wiring Connections DIP Switch 1 W915 (Y1 to Y2) Tw

506887-01 Page 39 of 78Issue 1213

506887-01Page 4 of 78 Issue 1213A97USMV Gas FurnaceThe A97USMV Category IV gas furnace is equipped with avariable capacity, variable speed integrated

506887-01Page 40 of 78 Issue 1213Typical A97USMV Wiring DiagramFigure 47

506887-01 Page 41 of 78Issue 1213Integrated ControlFigure 48

506887-01Page 42 of 78 Issue 1213Low Voltage Field WiringTable 142 StageSingle Stage

506887-01 Page 43 of 78Issue 1213These units are equipped with an integrated control. Thiscontrol manages ignition timing, combustion air inducerspee

506887-01Page 44 of 78 Issue 1213Switches 8 and 9 - Cooling Mode Blower Speed-The unit is shipped from the factory with the DIP switchespositioned for

506887-01 Page 45 of 78Issue 1213Switches 14 through 19 - Heating Mode Blower SpeedThese switches are factory set at the OFF position whichprovides 10

506887-01Page 46 of 78 Issue 1213BLOWER DATA

506887-01 Page 47 of 78Issue 1213BLOWER DATA

506887-01Page 48 of 78 Issue 1213BLOWER DATA

506887-01 Page 49 of 78Issue 1213BLOWER DATA

506887-01 Page 5 of 78Issue 1213For installation in a residential garage, the furnace must beinstalled so that the burner(s) and the ignition source a

506887-01Page 50 of 78 Issue 1213BLOWER DATA

506887-01 Page 51 of 78Issue 1213BLOWER DATA

506887-01Page 52 of 78 Issue 1213BLOWER DATA

506887-01 Page 53 of 78Issue 1213BLOWER DATA

506887-01Page 54 of 78 Issue 1213BLOWER DATA

506887-01 Page 55 of 78Issue 1213TABLE 22

506887-01Page 56 of 78 Issue 1213TABLE 23

506887-01 Page 57 of 78Issue 1213Unit Start UpFOR YOUR SAFETY READ BEFORE OPERATINGDo not use this furnace if any part has been underwater.A flood da

506887-01Page 58 of 78 Issue 1213Manifold Pressure MeasurementTo correctly measure manifold pressure, the differentialpressure between the positive ga

506887-01 Page 59 of 78Issue 1213Table 25High Altitude InformationNOTE: In Canada,certification for installationa at elevationsover 4500 feet (1372 m

506887-01Page 6 of 78 Issue 1213• Air filters must be replaced upon construction completion.• The input rate and temperature rise must be set per thef

506887-01Page 60 of 78 Issue 1213Figure 50

506887-01 Page 61 of 78Issue 1213Other Unit AdjustmentsPrimary LimitThe primary limit is located on the heating compartmentvestibule panel. This limi

506887-01Page 62 of 78 Issue 1213Heating Sequence of OperationThe integrated control initiates a pressure switch calibrationat the initial unit start-

506887-01 Page 63 of 78Issue 12135. If second-stage heat is required, the thermostat secondstage heat contacts close and send a signal to theintegrate

506887-01Page 64 of 78 Issue 1213ServiceAt the beginning of each heating season, system should bechecked as follows by a qualified service technician:

506887-01 Page 65 of 78Issue 121318. Remove screws along vestibule sides and bottom whichsecure vestibule panel and heat exchanger assemblyto cabinet.

506887-01Page 66 of 78 Issue 1213Planned ServiceA service technician should check the following items duringan annual inspection. Power to the unit m

506887-01 Page 67 of 78Issue 1213Integrated Control Diagnostic CodesPress the diagnostic push button and hold it to cycle through a menu of options. E

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506887-01 Page 69 of 78Issue 1213

506887-01 Page 7 of 78Issue 1213SETTING EQUIPMENTFigure 5UNIT MUST BE LEVEL SIDE TO SIDE IN ALL APPLICATIONS FOR PROPER OPERATION.A SLIGHT TILT TOWARD

506887-01Page 70 of 78 Issue 1213

506887-01 Page 71 of 78Issue 1213Troubleshooting: Heating Sequence of OperationIgnition and Call for Low Fire With Two StageThermostat

506887-01Page 72 of 78 Issue 1213Troubleshooting : Heating Sequence of Operation (continued)Call for High Fire With Two Stage Thermostat

506887-01 Page 73 of 78Issue 1213Troubleshooting : Heating Sequence of Operation (continued)Call for Heat Satisfied

506887-01Page 74 of 78 Issue 1213Troubleshooting : Heating Sequence of Operation (continued)Ignition and Call for Heat with Single Stage Thermostat

506887-01 Page 75 of 78Issue 1213Troubleshooting : Cooling Sequence of OperationCall for Cooling

506887-01Page 76 of 78 Issue 1213Troubleshooting : Continuous Fan Sequence of OperationContinuous Low Speed Indoor Blower Sequence of Operation

506887-01 Page 77 of 78Issue 1213REPAIR PARTS LISTThe following repair parts are available through Allied Air distributors. When ordering parts, incl

506887-01Page 78 of 78 Issue 1213REQUIREMENTS for COMMONWEALTH of MASSACHUSETTSModifications to NFPA-54, Chapter 10Revise NFPA-54 section 10.8.3 to ad

506887-01Page 8 of 78 Issue 1213Removing the Bottom PanelRemove the two screws that secure the bottom cap to thefurnace. Pivot the bottom cap down to

506887-01 Page 9 of 78Issue 1213NOTE: Units with 1/2 hp blower motor are equipped withthree flexible legs and one rigid leg. The rigid leg is equipp