Portions of the text and tables are reprinted from NFPA 54 /ANSI Z223.1−2009©, with permission of National Fire Protection Association, Quincy, MA 02269 and American Gas Association, Washington, DC

20001. This reprinted material is not the complete and official position of the NFPA or ANSI, on the referenced subject, which is represented only by the standard in its entirety.

Printed in U.S.A.

N9MP1, N9MP2, N9MPD

C9MPD, H9MPD, T9MPD

Safety Labeling and Signal Words

DANGER,

WARNING,

. . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . .

Signal Words in Manuals

The signal word WARNING is used throughout

this manual in the following manner:

WARNING

The signal word CAUTION is used throughout

this manual in the following manner:

CAUTION

Signal Words on Product Labeling

Signal words are used in combination with

colors and/or pictures or product labels.

Safety−alert symbol

When you see this symbol on the unit and in

instructions or manuals, be alert to the

potential for personal injury.

WARNING

PERSONAL INJURY, AND/OR PROPERTY

DAMAGE HAZARD

Failure to carefully read and follow this warning could

result in equipment malfunction, property damage,

personal injury and/or death.

Installation or repairs made by unqualified persons could

result in equipment malfunction, property damage,

personal injury and/or death.

The information contained in this manual is intended for

use by a qualified service technician familiar with safety

procedures and equipped with proper tools and test

instruments.

Installation must conform with local building codes and

with the Natural Fuel Gas Code (NFCG) NFPA 54/ANSI

Z223.1,

and

CAN/CSA−B149.1 and .2 Natural Gas and Propane

Installation Codes.

INSTALLER: Affix these instructions on or adjacent to the

furnace.

CONSUMER:

Retain

reference.

National

standards

these

instructions

440 01 1024 04

Canada

for

future

Dec. 2010

Table of Contents

Summary of Contents for International comfort products N9MP1

Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS 90+ Single Stage, Category IV, Gas Furnace N9MP1, N9MP2, N9MPD C9MPD, H9MPD, T9MPD (Upflow/Downflow/Horizontal) These instructions must be read and understood completely before attempting installation. Safety Labeling and Signal Words DANGER, WARNING, CAUTION, and NOTE Signal Words in Manuals...
Page 2 Required Notice for Massachusetts Installations Important The Commonwealth of Massachusetts requires compliance with regulation 248 CMR as follows: 5.08: Modifications to NFPA−54, Chapter 10 2) Revise 10.8.3 by adding the following additional requirements: (a) For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied: INSTALLATION OF CARBON MONOXIDE DETECTORS.
Page 3 START−UP CHECK SHEET For 90+ Furnace (This sheet is optional. Keep this page for future reference.) Date of Start−Up: Calculated Firing Rate:(See Checks and Adjustments Section). Dealer Name: Heating Check Address: Measured Line Pressure when Firing Unit: City, State(Province), Zip or Postal Code: Measured Manifold Gas Pressure: Phone: Temperature of Supply Air:...
Page 4: Safety Considerations
SAFETY CONSIDERATIONS WARNING Improper ins t allation, adjus t ment, alteration, serv ic e, maintenance, or use can cause explosion, fire, electrical shock, ELECTRICAL SHOCK HAZARD or other conditions which may cause death, personal injury, or Failure to follow this warning could cause personal property damage.
Page 5: Safety Rules
• unit and to replace any part of the control system and any gas When a furnace is installed so that supply ducts carry air control which has been under water. circulated by the furnace to areas outside the space containing the furnace, the return air shall also be handled Never obstruct the vent grilles, or any ducts that provide by a duct(s) sealed to the furnace casing and terminating...
Page 6: Installation
Installation WARNING Figure 2 Typical Downflow Installation CARBON MONOXIDE POISONING HAZARD See Vent Termination Failure to follow this warning could result in Coupling on inside Shielding in Vent Section. personal injury or death. and outside of wall to restrain vent pipe This furnace can NOT be common vented or connected to any type B, BW or L vent or vent (203.2mm)
Page 7: Installation Requirements
This furnace may be used for construction heat provided that all Installation Requirements the following conditions are met: Install furnace level. • The furnace is permanently installed with all electrical This furnace is NOT to be used for temporary heat of buildings wiring, piping, venting and ducting installed according to or structures under construction.
Page 8 Figure 3 Dimensions & Clearances MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS FOR ALL UNITS AIR INTAKE REAR VENT (N9MPD & *9MPD) FRONT (combustion air openings 3″ (76.2) in furnace and in structure) Required For Service 24″ (609.6) ALL SIDES Of SUPPLY PLENUM 1″...
Page 9: Installation Positions
for upflow and downflow installations or top to bottom for horizontal Knock Outs installations. CAUTION Vent and Combustion Air Connections CUT HAZARD For venting information literature, call 931.270.4100 with the complete model and serial number of the furnace. Failure to follow this caution may result in personal injury.
Page 10: Combustion & Ventilation Air
mentionnées. Le standard Canadien recommande l’inspection Typical Horizontal Installation Figure 5 par un personel qualifié et ce, une fois par année. Attic Les autoritées ayant juridiction (inspecteurs de gas, inspecteurs en bâtiments, département des incendies, etc) devraient être Inlet Pipe (not used on Single Pipe model) consultées avant l’installation afin de déterminer si un permis est requis.
Page 11 5. When sizing a grille, louver, or screen use the free area of 2. Figure 6 illustrates how to provide combustion and ventilation opening. If free area is NOT stamped or marked on grill or air when two permanent openings, one inlet and one outlet, louver, assume a 20% free area for wood and 60% for metal.
Page 12 standard method permits indoor air to be used for combustion and Indoor Combustion Air ventilation air. WARNING The Known Air Infiltration Rate Method shall be used if the infiltration rate is known to be less than 0.40 air changes per hour CARBON MONOXIDE POISONING HAZARD (ACH) and equal to or greater than 0.10 ACH.
Page 13 WARNING openings in doors or floors having a total minimum free area of 2 in. /1,000 BTUH (44 cm /kW) of total input rating of all appliances. CARBON MONOXIDE POISONING HAZARD • An attic or crawl space may be considered a space that freely Failure to follow the steps outlined below for each communicates with the outdoors provided there are adequate appliance connected to the venting system being...
Page 14: Vent And Combustion Air Piping
Core Materials Fittings Primer Pipe Pipe Cement Pipe D2468 Single Pipe (N9MP1 Models) D1527 F628 & −− D2235 D2661 This furnace is certified as a Category IV appliance. This furnace requires ventilation openings to provide air for proper combustion D2466 and ventilation of flue gases.
Page 15: Vent Termination Clearances
Figure 9, Figure 22, through Figure 24. For concentric vent termination clearances, refer to Concentric Termination Kit instructions. For Single Pipe Installation, models N9MP1, N9MP2, N9MPD or *9MPD, refer to Figure 9 for vent termination clearances. For Direct Vent Installation, models N9MP2, N9MPD or *9MPD, refer to Figure 8 for vent termination clearances.
Page 16 Figure 8 Direct Vent Termination Clearance U.S. Installation (2) Item Clearance Description Canadian Installation (1) Clearance above grade, veranda, porch, deck, balcony, or 12″ (30cm) # 12″ (30 cm) anticipated snow level 12″ (30 cm) for appliances u 10,000 Btuh (3 kW) and v 9″...
Page 17 Figure 9 Other than Direct Vent Termination Clearance Item Clearance Descriptions Canadian Installation (1) U.S. Installation (2) Clearance above grade, veranda, porch, deck, balcony, or 12″ (30cm) # 12″ (30 cm) anticipated snow level 12″ (30 cm) for appliances u 10,000 Btuh (3 kW) and v Clearance to a window or door that may be opened 4′...
Page 18 DO NOT trap the drain line in any other location than at the Condensate Drain Trap condensate drain trap supplied with the furnace. CAUTION This furnace removes both sensible and latent heat from the products of combustion. Removal of the latent heat results in condensation of the water vapor.
Page 19 Figure 11 Upflow Installations Top Vent On Some Models ONLY Plastic Caps (2) Yellow or black Coupling & Clamps (Optional) Single Pressure Switch Vent Drain & Clamps Dual Pressure Switch Detail Drain Tee Relief Tube Black Rubber Drain Tube (4.8mm) ID Black Rubber , (12.7mm) ID &...
Page 20 Clamp both ends of the drain tube using clamps provided. to exit the cabinet and connect the vent drain to either: Glue the CPVC street elbow to the trap using appropriate cleaner • A standard field supplied 2″ (50.8mm) PVC tee (N9MP1 or and solvent cement. N9MP2 models), or Connect the tee trap and the main drain line exiting the casing as •...
Page 21 Connect the tee trap and the main drain line exiting the casing as • A standard field supplied 2″ (12.7mm) PVC tee (N9MP1 or shown in Figure 20. N9MP2 models), or...
Page 22 • A standard field supplied 2″ (50.8mm) PVC tee (N9MP1 or secure with screws. N9MP2), or Move the caps to the top of the trap and mount the trap externally A 2″...
Page 23 Disconnect the hoses from the trap assembly, and remove trap and trap mounting bracket from the blower compartment. Using • A standard field supplied 2″ (50.8mm) PVC tee (N9MP1 or N9MP2 models), or cover plate and gasket provided in the loose parts bag, cover the hole from the burner compartment to the blower compartment and •...
Page 24 Remove knockout from the side of the furnace casing where drain • A standard field supplied 2″ (50.8mm) PVC tee (N9MP1 or tube will exit. N9MP2 models), or Mount the trap externally to the bottom side of the unit using the •...
Page 25 Using cover plate and gasket provided in the loose parts bag, cover the • A standard field supplied 2″ (50.8mm) PVC tee (N9MP1 or hole from the burner compartment to the blower compartment and N9MP2 models), or secure with screws.
Page 26 Figure 18 Horizontal Right through Top Alternate Orientation Single Pressure Switch Detail , (4.8mm) ID Rub ber Tube Trap Connection Plastic Cap AIR FLOW Yellow or black “Clamp ears” Pointed OUT Coupling & Clamps (Optional) Preassemble & insert into furnace Drain Tube Black , (12.7mm) Rubber...
Page 27 • A standard field supplied 2″ (50.8mm) PVC tee (N9MP1 or N9MP2 models), or Remove knockout from the side of the furnace casing where drain tube will exit.
Page 28 Connecting Vent and Combustion Air Piping Connecting Tee Trap to Condensate Figure 20 WARNING Trap and Main Drain Line CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in personal injury or death. Cement or mechanically seal all joints, fittings, etc. to prevent leakage of flue gases.
Page 29: Joining Pipe And Fittings
to inside surface of socket and outside of pipe. Do NOT Proper Sealing Procedure for allow primer to dry before applying cement. Figure 21 Combustion Blower Apply a thin coat of cement evenly in the socket. Quickly apply a heavy coat of cement to the pipe end and insert pipe into fittings with a slight twisting movement until it bottoms Vent Pipe Rubber Coupling...
Page 30 Install the couplings, nipple and termination elbows as shown Using Exterior Risers and maintain spacing between vent and combustion air piping as indicated in Figure 22, Figure 23 and Figure 24. Install elbows and pipe to form riser as shown in Figure 23. A metal shield is recommended 18″...
Page 31 Concentric Vent and Combustion− Sidewall Inlet Vent and Exhaust−Air Figure 26 Figure 29 Air Roof Termination Termination with Exterior Risers 2” (50.8mm) Max 18, Min. for Cold Climates Exhaust 36” Min (Sustained temperatures 05 F (914.4mm) and below for 24 or more con 8, Min.
Page 32: Concentric Termination
Concentric Termination WARNING Concentric Termination Kit Table 6 NAHA001CV & NAHA002CV Venting CARBON MONOXIDE POISONING, FIRE AND Table for N9MP2 Models EXPLOSION HAZARD 50,000 & 80,000 Btuh Furnaces Failure to follow this warning could result in NAHA002CV − 35′ (10.7m) & (4) 90° elbows personal injury, death and/or property damage.
Page 33: Gas Supply And Piping
Gas Supply and Piping WARNING Install gas piping in accordance with local codes, or in the absence of local codes, the applicable national codes. Refer to NFPA 54/ANSI Z223.1 for proper gas pipe size. FIRE AND EXPLOSION HAZARD It is recommended that a manual equipment shutoff valve be Failure to follow this warning could result in installed in the gas supply line outside the furnace.
Page 34 Figure 31 Typical Gas Piping for Upflow Vent Pipe Grommet (Single Pipe) Drip Leg and Union, Union* should be outside the Manual shut-off cabinet. Manual shut-off valve MUST be upstream of valve dripleg, union, and furnace. Use elbows and 3, (76.2mm)pipe nipple to con nect valve to piping when using right side gas pipe entry.
Page 35 Alternate BTUH Input Ratings (USA Only) * 50,000 40,000 75,000 60,000 The input rating of these furnaces can be changed from the 100,000 80,000 standard input rating to the alternate input rating shown in Table 8, by changing the main burner orifices. Changing of burner orifices 125,000 100,000 MUST be done by a qualified service technician.
Page 36 NATURAL GAS MANIFOLD PRESSURE (in wc) Table 11 FOR THE 40k, 60k & 80k BTUH MODEL AND ALTERNATE INPUT MODELS 20,000 BTU per burner MEAN ELEVATION ABOVE SEA LEVEL − ft(m) HEATING 0 to 2000 2001 to 3000* 3001 to 4000 4001 to 5000 5001 to 6000 6001 to 7000...
Page 37 Natural Gas Input Rating Check High Altitude Input Rate = Nameplate Sea Level Input Rate x (Multiplier) [USA] SEE CHECKS AND ADJUSTMENTS, Natural Gas Input Rating High Altitude Multiplier Elevation Check in this manual. ft (m) Natural Gas Propane Gas Final Gas Piping Check 2001′...
Page 38: Electrical Wiring
Electrical Wiring WARNING All wiring from furnace to optional equipment MUST conform to local codes or, in the absence of local codes with the latest edition of The National Electric Code, ANSI NFPA 70 and/or The ELECTRICAL SHOCK HAZARD Canadian Electric Code CSA C22.1. Install wiring in accordance Failure to follow this could result in personal injury with manufacturer’s instructions.
Page 39: Ductwork And Filter
Furnace Control Fuse The 24V circuit contains a 5−amp, automotive−type fuse located on furnace control. (See Figure 35) Any electrical shorts of 24V wiring during installation, service, or maintenance may cause fuse to blow. If fuse replacement is required, use only a fuse of identical size (5 amp.) Control Board Figure 35...
Page 40 Side Mounted Filter Rack Figure 37 Side Return Air Cutout Figure 36 A = 14 ″ Height of Cutout for 16″ x 25″ Filter B = 22 ″ Width of Cutout for 16″ x 25″ Filter Embossed Area on Side of Furnace 25-20-90 Filter Installation using Optional Filter Rack Furnace...
Page 41 A 3″ (76.2mm) clearance is required on the right side of the furnace Figure 40 Standoff Filter Rack in order to run the copper or plastic condensate drain line. Downflow Furnace Installation Non-Combustible Floor Installation Using Optional Fabricate a plenum to the dimensions given in Table 13, for the Standoff Filter furnace outlet.
Page 42: Checks And Adjustments
The Subbase for Combustible Floors MUST be used when a Exploded View of Base for downflow furnace is set on a combustible floor, even when the Figure 42 Downflow Cased Coil furnace is installed on a coil box. Cut the opening in the floor according to Table 13. The hole in the floor must be cut to the dimensions listed in Table 13 since the base is equipped with locating tabs that center the base over the opening.
Page 43: Main Burner Flame Check
WARNING Example (BTUH) No. of Time Per Natural Gas BTU Per FIRE OR EXPLOSION HAZARD Seconds Cubic Foot in BTU Content Hour Per Hour Seconds Failure to follow this warning could result in personal injury, death and/or property damage. 1,000 3,600 75,000 If any sparks, odors or unusual noises occur,...
Page 44: Temperature Rise Check
Change the heat or cool blower motor speed by removing Temperature Rise Check the motor lead from the “Heat” or “Cool” terminal and The blower speed MUST be set to give the correct air temperature replace it with the desired motor speed lead from the rise through the furnace as marked on the rating plate.
Page 45: Furnace Maintenance
Furnace Maintenance WARNING See “User’s Information Manual”. WARNING ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD FIRE, EXPLOSION, OR CARBON MONOXIDE Failure to follow this warning could result in HAZARD personal injury, death and/or property damage. Failure to follow this warning could result in •...
Page 46: Sequence Of Operation & Diagnostics
Sequence of Operation & Diagnostics The following is the normal operating sequence. Cooling (Y) Request: 24VAC signals applied to Y & G terminals of FCB (furnace control board) • Cool motor speed is energized after 5 second Cool Fan On Delay time. Y &...
Page 47 Heating Request with Gas Shut Off: 24 VAC signal applied to W terminal of FCB. The FCB will attempt 4 cycles for ignition then go to soft lockout for 3 hours then try for ignition again as long as the heat call remains. Power reset will clear lockout.
Page 48: Technical Support
N9MP2050B12C2 *9MPD050F12C2 N9MP2075B12C2 *9MPD075F12C2 N9MP2080F16C2 *9MPD080J16C2 N9MP2100F14C2 *9MPD100J14C2 N9MP2100J20C2 *9MPD100J20C2 N9MP2125J20C2 *9MPD125L20C2 * Denotes Brand International Comfort Products, LLC Lewisburg, TN 37091 U.S.A. Save This Manual For Future Reference 440 01 1024 03 Specifications are subject to change without notice...
Page 49 Model Specifications Manufacturers Number (Mfr No -See Rating Plate) ALL Models Specifications (N9MP1) N9MP1040B08C N9MP1050B12C N9MP1060B12C N9MP1075B12C General Gas Type Nat./Propane Nat./Propane Nat./Propane Nat./Propane Input (Btuh) 40,000 50,000 60,000 75,000 Output (Btuh) 36,000 45,500 54,000 68,000 Transformer Size (VA) T'stat Heat Anticipator Temp.
Page 50 Model Specifications Manufacturers Number (Mfr No -See Rating Plate) ALL Models Specifications (N9MP1) N9MP1080F16C N9MP1100F14C N9MP1100J20C N9MP1125J20C General Gas Type Nat./Propane Nat./Propane Nat./Propane Nat./Propane Input (Btuh) 80,000 100,000 100,000 125,000 Output (Btuh) 72,000 91,000 96,500 113,750 Transformer Size (VA) T'stat Heat Anticipator Temp.
Page 51 Model Specifications Manufacturers Number (Mfr No -See Rating Plate) ALL Models Specifications (N9MP2) N9MP2050B12C N9MP2075B12C N9MP2080F16C N9MP2100F14C N9MP2100J20C N9MP2125J20C General Gas Type Nat./Propane Nat./Propane Nat./Propane Nat./Propane Nat./Propane Nat./Propane Input (Btuh) 50,000 75,000 80,000 100,000 100,000 125,000 Output (Btuh) 45,500 68,000 72,000 91,000 96,500...
Page 52 Model Specifications Manufacturers Number (Mfr No -See Rating Plate) ALL Models Specifications (N9MPD) N9MPD040F08A N9MPD050F12A N9MPD060F12A N9MPD075F12A General Gas Type Nat./Propane Nat./Propane Nat./Propane Nat./Propane Input (Btuh) 50,000 75,000 40,000 60,000 Output (Btuh) 46,000 69,000 37,000 55,000 Transformer Size (VA) T'stat Heat Anticipator Temp.
Page 53 Model Specifications Manufacturers Number (Mfr No -See Rating Plate) ALL Models Specifications (N9MPD) N9MPD080J16A N9MPD100J14A N9MPD100J20A N9MPD125L20A General Gas Type Nat./Propane Nat./Propane Nat./Propane Nat./Propane Input (Btuh) 80,000 100,000 100,000 125,000 Output (Btuh) 73,600 92,000 92,000 115,000 Transformer Size (VA) T'stat Heat Anticipator Temp.
Page 54 Model Specifications Manufacturers Number (Mfr No -See Rating Plate) ALL Models Specifications (*9MPD) *9MPD050F12C *9MPD075F12C *9MPD080J16C *9MPD100J14C *9MPD100J20C *9MPD125L20C General Gas Type Nat./Propane Nat./Propane Nat./Propane Nat./Propane Nat./Propane Nat./Propane Input (Btuh) 50,000 75,000 80,000 100,000 100,000 125,000 Output (Btuh) 46,000 69,000 73,600 92,000 92,000...
Page 55 CIRCULATION AIR BLOWER DATA (CFM#) N9MP1040B08 (1)(5) N9MPD040F08 (1)(5) Speed Speed Med L Med H Med L Med H in wc 0.10 1079 0.10 1009 0.20 1032 0.20 0.30 0.30 0.40 0.40 0.50 0.50 0.60 0.60 0.70 0.70 0.80 0.80 0.90 0.90 1.00...
Page 56 CIRCULATION AIR BLOWER DATA (CFM#) N9MP1075B12, N9MP2075B12 (1)(5) N9MPD075F12, *9MPD075F12 (1)(5) * Denotes Brand Speed Speed Med L Med H Med L Med H in wc in wc 0.10 1163 1368 0.10 1163 1368 0.20 1120 1319 0.20 1120 1319 0.30 1076 1263...
Page 57 NOTE: Disposable filters are typically rated at 300 FPM (1.5 M/s). These filters only allow half the airflow when compared to 600 FPM (3.0 M/s) filters. See Tables below for bellyband location on motor Bellyband Location on *9MPD Motor Bellyband Location on N9MP1 & N9MP2 Motor Model Model *9MPD...
Page 58 Wiring Diagram (Single Stage, PSC Blower Motor) Specifications are subject to change without notice. 440 01 1024 04...
Page 59: Parts Replacement Information Guide
TO OBTAIN INFORMATION ON PARTS: Consult your installing dealer or the classified section of your local telephone directory under the “Heating Equipment“ or “Air Conditioning Contractors and Systems” headings for dealer listing by brand name, or contact: International Comfort Products, LLC Consumer Relations Department P.O. Box 128 Lewisburg, TN 37091, USA 931−270−4100...

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