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N9MP1 & N9MP2
90 Single Stage
*9MPD *Denotes Brands (C, H, T)
FAN ASSISTED, DIRECT
Category IVFurnace
VENT GAS FURNACE
SAFETY REQUIREMENTS
Recognize safety information. This is the safety- alert symbolZ.l_. When you see this symbol on the furnace and in instructions manuals be alert to
the potential for personal injury.
Understand the signal words DANGER, WARNING, or CAUTION. These words are used with the safety-alert symbol. DANGER identifies the
most serious hazards, those that will result in
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START-UP CHECK SHEET For 90+ Furnace (Keep this page for future reference) Dealer Name: Address: Business Card Here City, State(Province), Zip or Postal Code: Phone: Owner Name: Manual Gas Shut-Off Upstream YES NOE_ of Furnace/Drip- Leg? Address: YES NO Condensate Drain Connected? City, State(Province), Zip or Postal Code: NO Condensate Drain Trapped? YES Transition Pressure switch hose relocated for U/D/H Model Number: Application? YES _ NO Blower Speed Checked? YES _ NO Serial Number: All Elec
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1. Safe Installation Requirements • This furnace is NOT approved for installation in mo- bile homes, trailers or recreation vehicles. FIRE, EXPLOSION, AND ASPHIXlATION HAZARD • Seal around supply and return air ducts. • Install correct filter type and size. Improper adjustment, alteration, service, maintanence or installation could cause serious • Unit MUST be installed so electrical components are pro- injury, death and/or property damage. tected from direct contact with water. Installation or
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Have someone check the structure frequently during cold FrozenWater PipeHazard weather to make sure it is warm enough to prevent pipes from freezing. Instruct them on a service agency to call to provide service, if required. WATER DAMAGE TO PROPERTY HAZARD -or- Failure to protect against the risk of freezing could 3. Install a reliable remote sensing device that will notify some- result in property damage and/or personal injury. body of freezing conditions within the home. Do not leave your home
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Installation Requirements Typical Upflow Installation 1. Install furnace level. Aluminumor non-rustingshield recommended.(See 2. This furnace is NOT to be used for temporary heat of buildings Vent TerminationShieldingfor dimensions). or structures under construction. Coupling on ends of *8" Min. _l[q _I_ exhaust pipe. Total 3. Install the vent pipes as short as practical. (See Gas Vent 20' Max. Inlet Pipe (not Installation section). in same _ _ used on Single pipe & coupling out- atmospheric <_
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Dimensions & Clearances MINIMUM CLEARANCES TO r-- ] COMBUSTIBLE MATERIALS FOR ALL UNITS REAR O TOP FRONT (combustion air openings in 3" furnace and in structure) Required For Service *24" | _A_ ALL SIDES Of SUPPLY PLENUM 1" B_ SIDES O ] VENT O LEFT SIDE [-_ _ TOP OF FURNACE 1" 11/4 FRONT *30" clearancerecommendedfor casingremoval. TRAP(COUNTERFLOW) _ / ELECTRICAL GASt_ 11/16 Horizontalposition:Linecontactispermissibleonly between VENT ) 1/1 linesformed by intersectionsof top and two sidesof furn
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drain line must be provided. See "Condensate Drain Trap"section Installation Positions for further details. This furnace can be installed in an upflow, horizontal (either left or Leveling right) or downflow airflow position. DO NOT install this furnace on its back. For the upflow position, the return air ductwork can be at- Proper leveling of the furnace must be provided to insure proper tached to either the left or right side panel and/or the bottom. For drainage of the condensate from the furn
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3. Combustion & Ventilation Air Air Openings and Connecting Ducts For Single Pipe Installation Total input rating for all non direct vent gas appliances MUST be considered when determining free area of open- ings. CARBON MONOXIDE POISONING HAZARD 2, Connect ducts or openings directly to outside. Failure to provide adequate combustion and 3. When screens are used to cover openings, they MUST be ventilation air could result in death and/or personal no less than 1/4" mesh. injury. The minimum dimen
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NOTE: Refer to definitions in section titled Unusually Tight Free Area Construction, If any one of the conditions apply, the space MUST be considered confined space regardless of size. BTUH MinimumFreeArea Requiredfor Each Opening 1. Adjoining rooms can be considered part of an unconfined Input HorizontalDuct VerticalDuctor openings RoundDuct area if there are openings without doors between rooms. Rating (2,000 BTUH) to outside(4,000 BTUH) (4,000 BTUH) 2. An attic or crawl space may be considere
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For Two Pipe Installation CARBON MONOXIDE POISONING HAZARD This furnace can NOT be common vented or connected to any type B, BW or L vent or vent connector, nor to any portion of a facto- Failure to follow the steps outlined below for each ry-built or masonry chimney. If this furnace is replacing a previous- appliance connected to the venting system being ly common-vented furnace, it may be necessary to resize the existing vent and chimney to prevent oversizing problems for the placed into opera
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bustion orthefurnace can use airfrom inside the structure forcom- 4. Use of vertical piping is preferred because there will be bustion. TheINLET airpipe isoptional. Ifcombustion aircomes some moisture in the flue gases that may condense as it from inside thestructure, adequate make upairMUST beprovided leaves the vent pipe (See 5peciallnstruction ForHorizontal tocompensate foroxygen burned. See Confined Space Installa- Vents). tion in the Combustion and Ventilation Air chapter. If combus- 5. The
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3. Insulate combustion air inlet piping when run in warm, hu- If more than five elbows are required, reduce the length of mid spaces such as basements. both the inlet and exhaust pipes 5' for each additional elbow used. Sizing Combustion Air and Vent Pipe For "Concentric Termination Kit" Venting table, see Consult Table 3 or Table 4 to select the proper diameter exhaust "Section 11" in this manual. and combustion air piping. Exhaust and combustion air piping is sized for each furnace Btuh size b
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Canadian Installation (1) U.S. Installation (2) Item Clearance Description A Clearance above grade, veranda, porch, deck, balcony, or 12" (30cm)# 12" (30cm) anticipated snow level B Clearance to a window or door that may he opened 6" (15 cm) for appliances _< 10,000 BTUH (3kW), 12" (30 6" (15 cm) for appliances_<10,000BTUH(3kW),9" (23 cm) cm) for appliances > 10,000 Btuh (3 kW) and _<100,O00 Btub for appliances>10,000Btuh(3 kW)and _<50,000Btuh(15 (30 kW), 36" (91 cm) for appliances > 100,000 Bta
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Canadian Installation (1) Item Clearance Descriptions U.S. Installation (2) A Clearance above grade, veranda, porch, deck, balcony, or 12" (30cm)# 12" (30 cm) anticipated snow level B Clearance to a window or door that may be opened 6" (15 cm) for appliances _< 10,000 BTUH (3kW), 12" (30 4' (1,2 m) below or to the side of the opening. 1' (30 cm) cm) for appliances > 10,000 Btuh (3 kW) and _<100,000 Btuh above the opening. (30 kW), 36" (01 cm) for appliances > 100,000 Btub (30 kW) C Clearance to
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CondensateDrainTrap FROZEN AND BURST WATER PIPE HAZARD This furnace removes both sensible and latent heat from the prod- ucts of combustion. Removal of the latent heat results in con- Failure to do so could result in burst water pipes, densation of the water vapor. The condensate is removed from the serious property damage and/or personal injury. furnace through the drains in the plastic transition and the vent fit- If a condensate pump is installed, a plugged ting. The drains connect to the ext
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Upflow Installations Top Vent ONLY Caps(2) _ ellowor blackPlastic Co_ (Optional) VentDrain & Clamps Pressure Switch Detail le Pressure Switch IDRubberTube 1/2"ID Drain StreetEIbow /'CPVC Drain Connector Black PVC (Loosepartsbag) 3/4"PVC X l/z" CPVC (Loose partsbag) Casing Grommet Black Rubber 5/8"ID (Loose parts bag) Drain LineVentTee3/4"PVC or l/z" CPVC(Field supplied) 25-24-42 Drain Tube(& Clamps) Black Rubber /8 ID, Cut length to fit (Loose partsbag) Upflow Installations Top Vent (SeeFigure 9
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UpflowInstallationsVentthru LeftSide Yellow or black Plastic Cap 2" PVCCoupling ONLY Coupling oj Vent Drain Either: The PVC & Clamps Drain Tee or a field supplied 2" PVC Te_ Dual Pressure Switch Detail Single Pressure Switch ID RubberTube TeeTrapWhite PVC (loose partsbag) Sl8" ID Hose Black (Movefrom bottom of draintee & Clamps if installed) DrainConnector Black PVC 314" PVCX 112"CPVC SIDE VIEW (Loosepartsbag) ,,,_ Rotate downward Casing Grommet Black Rubber s/8" ID (Loose parts bag) NOTET Bw]t-
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All ModelsVentthru RightSide 4} Yellow or black Plastic Cap On SomeModels ONLY 2" PVC Coupling Either: The PVC oJ Drain Teeor a field Vent Drain & Clamps supplied2" PVC Tee Single Pressure Switch Detain Dual Pressure Switch TeeTrap White PVC & Clamps ElbowsTubes (2) & Clamps Black, 1/z" ID (loose partsbag) Barbed Coupling, 112"OD parts bag) Drain Line VentTee3/4"PVC CPVC(Field supplied) SIDE VIEW _otate downward 314"PVCX 1/2" CPVC (Loose partsbag) Casing Grommet NOTE.'f Built-in channel will "Bl
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DownflowLeft Side Vent and Trap SIDE VIEW Yellow or black Plastic Cap /,,_ Rotate downward 2" PVCCoupling Coupling&Clamps >_ (Optional)_ I._ NOTE_. Bw]t-in channel will be angled 5° to 10° also. VentDrain ]|mm|l & Clamps Either: The PrO Drain Teeor a field supplied 2" PVC Tee Dual Pressure Switch 3/16"ID On Some Models TeeTrapWhtte PVC___ _ ONLY INLET _) 4= (loosepartsbag) -__ Hose Single Pressure Switch Detail Connector, 3/16" OD (loose parts hag) E,how!l WARNING _._ _1 M°veCap s ReliefTube, -
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Downflow Right Side Vent and Trap Yellow or black Plastic Cap Trap Connection _Clamp ears '_ ointed OUT / Vent Drain Pmassemble& &Clamps insert intofurnace 3/16" ID SIDE VIEW Rubber Tube ,_Rotate downward Coupling & Clamps Splice Connector 112"ID Barbed Drain Hose & Clamps Dual Pressure Switch On Some NOTE.'_Built-in channel will be angled 5° to 10° also. 2" PVCCoupling ModelsONLY Single Pressure Switch Detail Either:The PVC supplied 2" PVC Tee Drain TubeBlack, sis" ID Corrugated PVC3/4" WARNING
