Instruction/ maintenance manual of the product M3RL Series Nordyne
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Installation Instructions M3RL Series 90+ Downflo w Condensing Furnace Direct Vent (Sealed Combustion) Forced Air Gas Furnaces LEAVE THESE INSTRUCTIONS WITH THE HOMEOWNER. ! W ARNING: FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in serious injury, death or property damage.
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3 Application M-Manufactured Home Furnace Series Comfort Model RL - Condensing Downflow M 3 R L - 060 A - A W Door Color W - White G - Gray Cabinet Dimensions A - 56" x 19-3/4" x 23-3/4” B - w/Coil Cavity, 76" x 19-3/4" x 23-3/4" Electrical Code A - 1PH, 60 Hz, 120 VAC Conversion .
4 19-7/8 19-7/8 24-5/8 24-5/8 56-1/16 56-1/16 20-9/32 20-9/32 21-17/32 21-17/32 21-29/32 21-29/32 21-15/16 21-15/16 19-3/16 19-3/16 23-7/16 23-7/16 28-15/32 28-15/32 3-17/32 3-17/32 4-11/16 4-11/16 4-.
5 ! W ARNING: Do not use this appliance if any part has been submerged under water. Im- mediately call a qualified service tech- nician to inspect the appliance and to replace any part of the control system and any gas control that has been submerged underwater.
6 Follow the instructions in this booklet carefully and this appliance will provide many years of superior performance. If you wish to cool your home automatically with a central air conditioning system investi- gate the excellent NORDYNE cooling systems available from your heating and cooling con- tractor.
7 CE générateur d'air chaud doit être installé conformément aux instructions du fabricant et aux codes locaux. En l'absence de code local, respecter la norme ANSI Z223.,1, institulé Na- tional Fuel Gas Code ou les codes d'installation CAN/GCA-B149.
8 Figure 4. Figure 3. 13 1/4" 10 1/4" 19” 19" T op Vie w of Duct Connector x SUPPLY AIR DUCT FLOOR CAVITY (depth equal to "X" in Figure 5 and Table 5) RETURN AIR PROVISIONS U.
9 Figure 6. Closet or Alcove 10" 23 -1/4" FLOOR OPENING C L C L ALT. FUEL LINE HOLES SIDE WALL RE AR WALL FUEL LINE HOLE Figure 5. X SEE TABLE 5 REDUCER FELT-SEAL( 1 ) SPACERS C ( )OPENING TO DUCT (1) WITH PLATE (C) REMOVED OPENING BECOMES 13-1/4” x 13-1/4” (2) WITH PLATE (C) REMOVED OPENING BECOMES 13" X 13".
10 Figure 7. Cut-Out Locations 2-3/4 2 1-3/4 17-29/32 21-7/16 1-3/4 3-19/32 14-1/2 14-1/2 2-1/4 23-1/4 12-7/8 14-3/4 20 24 21-3/4 10 15-1/2 ˚ AL T FUEL LINE ENTR Y 1-1/4 VENT FUEL LINE ENTR Y FURNACE.
11 Figure 9. Duct Connector Screw Do wn Duct Connectors Platinum Series Figure 8. Mounting Plate REAR W ALL SUPPLY AIR DUCT FUEL LINE HOLES MOUNTING PLATE FLOOR OPENING BEND CONNECTOR TABS UNDER DUCT .
12 TABS TABS DUCT DUCT 1. INSERT DUCT PLENUM CONNECTOR INTO DUCT CUT-OUT. 2. BEND BOTTOM TABS OVER AND ONTO THE UNDERNEATH DUCT SERVICE. Staple Folded Duct Flap (typ) to side of Duct Connector Duct STEP 4.
13 MTG. PLATE TABS SLIDE FURNACE ALL THE WAY BACK ONTO MTG. PLATE S UPPLY AIR D UC T Knockout Over Holes SECURE FURNACE WITH 2 FASTENERS AT FRONT CORNER HOLES SUPPLY AIR DUCT FUEL LINE HOLES MTG. PLATE TABS SLIDE FURNACE ALL THE WAY BACK ONTO MTG. PLATE SECURE FURNACE WITH 2 FASTENERS AT FRONT CORNER HOLES Figure 13.
14 ! CA UTION: Do not allow debris to fall into the fur- nace. This could cause unsafe opera- tion and voids the furnace warranty. VENTING REQUIREMENTS ! W ARNING: FURNACE MUST NOT BE COMMON VENTED WITH OTHER APPLIANCES. General This section specifies installation requirements for 2-pipe combustion air piping.
15 *NOTES 1 . 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 radius elbow is equivalent to two long radius elbows. 4 . Do not include termination elbows in calculation of vent length.
16 escape through such appliances or vents. Do not vent the furnace to a fireplace chimney or building chase. If removing an existing furnace in a venting system, the venting system may not be properly sized. To test the vent system with the remaining appliances, follow the test outlined below.
17 Figure 16. Horizontal V enting Downflow Furnace Seal/Caulk Around Pipe at Building 90˚ Elbow 12" Min. Normal Snow Level W all Coupling First Support Should be as Close to Furnace Connection a.
18 Horizontal Venting Vent and combustion air intake terminations must be as shown in Figure 19 unless the concentric vent termination kit is used. ! W ARNING: Ensure that the combustion air vent and the exhaust vent are configured as shown in Fig. 19.
19 36" max. 12" min. Exhaust V ent Option B Exhaust V ent Option A Exhaust V ent Option C Mounting Kit Faceplate Secured to Wall with Screws 12" Min. 36" Max. 12" Min. 36" Max. 7" Min. 8" Min. 12" Min. to Normal Snow Level Combustion Air Inlet Grade Level or Normal Snow Inlet Exhaust Figure 20.
20 Figure 21. Furnace with Condensate Drain Trap Assembly A A Clamp Step 1: Loosen Step 2: Rotate to drain direction Step 3: Retighten Keep Downward Slope Alt. Drain Alt. Drain Alt. Drain Alt. Drain Floor Ca vity Floor “Hard ” J Drain T ube Burner Box Collector Box 1.
21 Figure 22. Typical Gas Piping Table 7. Capacity of Black Iron Gas Pipe (cu. ft. per hour) for Natural Gas (specific gravity = .60) To Gas Supply Floor Inducer Alt. Gas Line Entry Floor Cavity Gas Valve Burner Box Control Board Main Blower N OM IN AL LE N G TH OF PIPE R U N B LA C K IR ON ( f ee t ) PIPE DIAM ETER ( i n .
22 Table 8. Approximate Orifice Size for Natural and LP Gases Nat LP Nat LP Nat LP Nat LP Nat LP 060A-A/ B W 60, 000 4 5 0 57 50 57 51 58 51 58 52 59 080A-A/ B W 80,000 5 49 1. 15 mm 49 1.15 mm 50 57 50 57 51 58 Fur na c e Mod el Numbe r M3R L - Fur na c e R a t ing P l ate I n p u t (B tuh) No .
23 Figure 25. T ypical Installation For Sealed Burner Bo x With Access Cover Plate Burner Orifices Gas Manifold Flame Observation Port Gas Valve Access Cover Plate Burner Box Inlet Pressure Ta p Inlet On/Off Lever Figure 24. Burner Inspection Figure 23.
24 7. After the flame ignites, visually inspect the burner assembly to ensure that the flame is drawn directly into the center of the heat exchanger tube, as shown in Figure 23. The end of the flame will be out of sight around the bend of the heat exchanger tube.
25 Field Supplied Disconnect Within Sight of Furnace Field Supplied Panel Connector Field Supplied Fused Service Panel Black (Hot) White (Neutral) Green or Bare (Ground) Black White Black White Black White Field Line Voltage Wiring Factory Line Voltage Wiring Ground Ground Ground Junction Box (may be internal or external to the furnace).
26 Figure 28. Low Voltage Field, Four-wire Heating/Cooling Applications R C Y G W A/C Condensing Unit Condensing Unit Control Box Room Thermostat Flame Signal Light (Yellow) Status Light (Red) 60 90 1.
27 5 . After the furnace has run for approximately five minutes, set the thermostat below room temperature and verify steps 9 - 11 of the SEQUENCE OF OPERATION. Shut Down Procedure In the event that the furnace must be shut down, follow this procedure: 1.
28 TIME FOR TIM E FOR ON E R EV OLU TION ON E R E VOLU TION (S ECONDS ) 1 5 10 (S ECONDS ) 1 5 10 24 150 750 1500 80 45 225 450 26 138 692 1385 82 44 220 439 28 129 643 1286 84 43 214 429 30 120 600 1.
29 Gas Valve – The gas valve controls the flow of gas to the burners. When the gas valve is energized it automatically opens and regulates the gas pressure in the manifold. Pressure Switch – The pressure switch veri- fies that the inducer is drawing the combustion gases through the heat exchanger.
30 ! W ARNING: Never operate the furnace without a filter in place. Dust and lint in the return air can build up on internal compo- nents, resulting in loss of efficiency, equipment damage, and possible fire. Lubrication The bearings in the circulating air blower mo- tors are pre-lubricated and sealed at the fac- tory.
31 Initial Power up: After 30 seconds of igniter warm-up the gas valve (24 VAC) will then open. The igniter circuit will stay ener- gized for 3 seconds after the gas valve opens.
32 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 21 22 M3 Do wnflow Furnace 1 Door Assembly - Louvered 2 Filter Inside Door 3 Blower Assembly 4 Control Board 5 Pressure Switch 6 Flame Rollout Switch 7 “J” Trap Hard Tube 8 Low Voltage Transformer 9 In Line Drain Assembly 10 Junction Box 1 1 Vent Safety Switch Figure 29.
33 Figure 30. Downflow Furnace Wiring Diagram WD #710240B If an y o ft h e ori g ina l wit h th e f u rn ace m us t be re p laced, i t m us t be re p laced wirin g m a t e ri a l h avin g a ratin g of a tl eas t ˚ C. U se co pp e r co n duc t o r s o nl y.
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35 UNIT MODEL NUMBER ________________ Minimum Clearances per Table 3? ________ Electrical Connections tight? _____________ Line Voltage Polarity correct? ____________ Supply Voltage: _________________.
O’Fallon, MO 708219D (Replaces 708219C) Specifications and illustrations subject to change without notice and without incurring obligations. Printed in U.
An important point after buying a device Nordyne M3RL Series (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Nordyne M3RL Series yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Nordyne M3RL Series - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Nordyne M3RL Series you will learn all the available features of the product, as well as information on its operation. The information that you get Nordyne M3RL Series will certainly help you make a decision on the purchase.
If you already are a holder of Nordyne M3RL Series, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Nordyne M3RL Series.
However, one of the most important roles played by the user manual is to help in solving problems with Nordyne M3RL Series. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Nordyne M3RL Series along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
