Nordyne M3RL Series User Manual

Installation InstructionsM3RL Series 90+ Downflow Condensing FurnaceDirect Vent (Sealed Combustion) Forced Air Gas FurnacesLEAVE THESE INSTRUCTIONS W

10Figure 7. Cut-Out Locations2-3/421-3/417-29/3221-7/161-3/43-19/3214-1/214-1/22-1/423-1/412-7/814-3/4202421-3/41015-1/2˚ALT FUEL LINEENTRY1-1/4VENTFU

11Figure 9. Duct ConnectorScrew DownDuct ConnectorsPlatinum SeriesFigure 8. Mounting PlateREAR WALLSUPPLY AIR DUCTFUEL LINE HOLESMOUNTING PLATEFLOOR O

12TABS TABSDUCT DUCT1. INSERT DUCT PLENUM CONNECTOR INTO DUCT CUT-OUT.2. BEND BOTTOM TABS OVER AND ONTO THE UNDERNEATH DUCT SERVICE.Stap

13MTG. PLATE TABSSLIDE FURNACE ALL THE WAY BACK ONTO MTG. PLATESUPPLY AIR DUCTKnockout Over HolesSECURE FURNACE WITH 2 FASTENERS AT FRONT CORNER HOLES

14! CAUTION:Do not allow debris to fall into the fur-nace. This could cause unsafe opera-tion and voids the furnace warranty.VENTING REQUIREMENTS! WAR

15*NOTES1. Subtract 3.5 ft. for each additional 3" 90 degree elbow.2. Two 45 degree elbows are equivalent to one 90 degree elbow.3. One short rad

16escape through such appliances or vents. Donot vent the furnace to a fireplace chimney orbuilding chase.If removing an existing furnace in a ventin

17Figure 16. Horizontal VentingDownflow FurnaceSeal/CaulkAround Pipeat Building90˚ Elbow12"Min.Normal Snow LevelWallCouplingFirst Support Should

18Horizontal VentingVent and combustion air intake terminationsmust be as shown in Figure 19 unless theconcentric vent termination kit is used.! WARNI

1936" max.12" min.Exhaust VentOption BExhaust VentOption AExhaust VentOption CMounting KitFaceplate Securedto Wall with Screws12" Min.3

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20Figure 21. Furnace with Condensate Drain Trap AssemblyAAClampStep 1: LoosenStep 2: Rotate to drain directionStep 3: RetightenKeepDownwardSlopeAlt. D

21Figure 22. Typical Gas PipingTable 7. Capacity of Black Iron Gas Pipe (cu. ft. per hour) for Natural Gas(specific gravity = .60)To Gas SupplyFloor

22Table 8. Approximate Orifice Size for Natural and LP GasesNat LP Nat LP Nat LP Nat LP Nat LP060A-A/BW 60,000 4 50 57 50 57 51 58 51 58 52 59080A-A/B

23Figure 25. Typical Installation For SealedBurner Box With Access Cover PlateBurner OrificesGasManifoldFlameObservationPortGasValveAccessCoverPlateB

247. After the flame ignites, visually inspect theburner assembly to ensure that the flameis drawn directly into the center of the heatexchanger tube,

25Field Supplied Disconnect Within Sight of FurnaceField SuppliedPanel ConnectorField SuppliedFused ServicePanelBlack (Hot)White (Neutral)Green or Bar

26Figure 28. Low Voltage Field,Four-wire Heating/Cooling ApplicationsR C Y G WA/C Condensing UnitCondensing UnitControl BoxRoomTherm

275. After the furnace has run for approximatelyfive minutes, set the thermostat below roomtemperature and verify steps 9 - 11 of theSEQUENCE OF OPERA

28TIME FOR TIME FORONE REVOLUTION ONE REVOLUTION(SECONDS) 1 5 10 (SECONDS) 1 5 1024 150 750 1500 80 45 225 45026 138 692 1385 82 44 220 43928 129 643

29Gas Valve – The gas valve controls the flow ofgas to the burners. When the gas valve isenergized it automatically opens and regulatesthe gas pressur

3ApplicationM-Manufactured HomeFurnace SeriesComfort ModelRL - Condensing DownflowM 3 R L - 060 A - A WDoor ColorW - WhiteG - GrayCabinet DimensionsA

30! WARNING:Never operate the furnace without afilter in place. Dust and lint in the returnair can build up on internal compo-nents, resulting in los

31Initial Power up: After 30 seconds of igniterwarm-up the gas valve (24 VAC) will thenopen. The igniter circuit will stay ener-gized for 3 seconds af

32123456789101112131415161718192122M3 Downflow Furnace1 Door Assembly - Louvered2 Filter Inside Door3 Blower Assembly4 Control Board5 Pressure Switch6

33Figure 30. Downflow Furnace Wiring DiagramWD #710240BIfanyoftheoriginalwiththefurnacemustbereplaced, itmustbereplaced wiringmaterialhavingaratingof

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35UNIT MODEL NUMBER ________________Minimum Clearances per Table 3? ________Electrical Connections tight? _____________Line Voltage Polarity correct?

O’Fallon, MO708219D (Replaces 708219C)Specifications and illustrations subject to change withoutnotice and without incurring obligations. Printed in

419-7/819-7/824-5/824-5/856-1/1656-1/1620-9/3220-9/3221-17/3221-17/3221-29/3221-29/3221-15/1621-15/1619-3/1619-3/1623-7/1623-7/1628-15/3228-15/323-17/

5! WARNING:Do not use this appliance if any parthas been submerged under water. Im-mediately call a qualified service tech-nician to inspect the appli

6Follow the instructions in this booklet carefullyand this appliance will provide many years ofsuperior performance.If you wish to cool your home auto

7CE générateur d'air chaud doit être installéconformément aux instructions du fabricant etaux codes locaux. En l'absence de code local,resp

8Figure 4.Figure 3.13 1/4"10 1/4"19” 19"Top Viewof DuctConnectorxSUPPLY AIR DUCTFLOOR CAVITY(depth equal to "X" in Figure 5

9Figure 6. Closet or Alcove10"23 -1/4"FLOOR OPENINGCLCLALT. FUELLINE HOLESSIDE WALLREAR WALLFUEL LINE HOLEFigure 5.XSEE TABLE 5REDUCERFELT-S