Portions of the text and tables are reprinted from NFPA 54 /ANSI Z223.1−2012, 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.

Single−Stage, PSC Blower Motor

N9MSE (A Series)

Safety Labeling and Signal Words

DANGER,

WARNING,

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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.

INSTALLER: Affix these instructions on or adjacent to the

furnace.

CONSUMER:

Retain

reference.

Use of the AHRI Certified TM Mark indicates a

manufacturer's participation in the program.

For verification of certification for individual

products, go to www.ahridirectory.org .

these

instructions

440 01 4103 03

for

future

12/5/2013

Table of Contents

Summary of Contents for International comfort products N9MSE Series

Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS Single−Stage, PSC Blower Motor 35” Tall, High Efficiency Condensing Gas Furnace N9MSE (A Series) 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 signal words DANGER,...
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: Safety Considerations
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Safety Considerations changing residential construction practices. We require these instructions as a minimum for a safe installation. Follow all safety codes. Wear safety glasses, protective WARNING clothing, and work gloves. Have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit.
Page 4: Introduction
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE accessory gas conversion kit is required to convert thermostat. Return−air temperature must not exceed 80°F furnace for use with propane gas. (27°C) db. Failure to follow these return−air temperature limits See Table 1 for required clearances to combustible may affect reliability of heat exchangers, motors, and controls construction.
Page 5: Electrostatic Discharge Precautions Procedure
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE General Installation Disconnect all power to the furnace. Multiple disconnects may be required. DO NOT TOUCH THE US: NFGC and the NFPA 90B. For copies, contact the CONTROL OR ANY WIRE CONNECTED TO THE National Fire Protection Association Inc., CONTROL PRIOR TO DISCHARGING YOUR BODY’S Batterymarch Park, Quincy, MA 02269;...
Page 6: Dimensions
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Figure 2 Dimensions SD5060−4 Rev F N9MSE SHIP WT. CABINET BOTTOM LB (KG) FURNACE SIZE OUTLET WIDTH AIR INTAKE WIDTH INLET WIDTH 0401410 14−3/16 (361) 12−1/2 (319) 12−9/16 (322) 7−1/8 (181) 123 (55) 0401712 17−1/2 (445) 15−7/8 (403) 16 (406) 8−3/4 (222)
Page 7: Location
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Location not be installed directly on any combustible material other  than wood flooring (refer SAFETY CONSIDERATIONS). CAUTION be located close to the chimney or vent and attached to an  air distribution system. Refer to Air Ducts section. be provided ample space for servicing and cleaning.
Page 8 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Figure 3 Multipoise Orientations THE BLOWER IS LOCATED BELOW THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED UPWARD. THE BLOWER IS LOCATED TO THE RIGHT OF THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED TO THE LEFT. THE BLOWER IS THE BLOWER IS LOCATED TO THE LEFT...
Page 9: Location Relative To Cooling Equipment
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Location Relative to Cooling CAUTION Equipment FURNACE CORROSION HAZARD The cooling coil must be installed parallel with, or on the Failure to follow this caution may result in furnace downstream side of the unit to avoid condensation in the heat damage.
Page 10 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE ONE OUTDOOR OPENING requires: The Standard Method: a. 1 sq. in. (25.4 square mm)of free area per 3,000 Btuh The space has no less volume than 50 cubic feet per (734 mm /kW) for combined input of all gas 1,000 Btuh (4.8 cubic meters per kW) of the maximum appliances in the space per Table 3 and input ratings for all gas appliances installed in the space...
Page 11: Combination Of Indoor And Outdoor Air
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE In spaces that use the Indoor Combustion Air Method, Air for Combustion, Ventilation, Figure 7 infiltration should be adequate to provide air for and Dilution from Indoors combustion, permanent ventilation and dilution of flue gases. However, in buildings with unusually tight construction, additional air MUST be provided using the methods described in the Outdoor Combustion Air Method...
Page 12: Condensate Trap
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Table 4 Minimum Space Volumes for 100% Combustion, Ventilation and Dilution Air from Outdoors OTHER THAN FAN-ASSISTED TOTAL FAN-ASSISTED TOTAL (1,000’S BTUH GAS INPUT RATE) (1,000’S BTUH GAS INPUT RATE) Space Volume Ft 1,050 1,400 1,750 1,400 1,500...
Page 13 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Figure 9 Unconverted Factory Configuration as viewed in the Downflow Orientation Remove pressure switch tube from front pressure switch and discard. A new tube is shipped in the loose parts bag. Remove relief tube from relief Remove tube from relief port.
Page 14 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Condensate Trap − Horizontal NOTICE Orientation The condensate trap extends below the side of the When the furnace is installed in the horizontal right position, the casing in the horizontal position. A minimum of 2-in. condensate trap will be initially located at the bottom of the (51 mm) of clearance is required between the casing collector box, as received from the factory.
Page 15 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Horizontal Right Trap Configuration (CONTINUED) NOTE: Remove knockout in casing before re−installing the condensate trap. Slide relief tube in stand−offs to adjust length. Vent elbow shown in alternate Attach condensate orientation. Tighten clamp on trap with screw to inlet to vent elbow 15 lb.−in.
Page 16 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Horizontal Left Trap Configuration (CONTINUED) NOTE: Remove knockout in casing before re−installing the Install two plugs previously condensate trap. removed in open ports on Rotate elbow to collector box. desired position and torque clamp Connect relief tube to port on inlet 15 lb.−in.
Page 17 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE 5. Pull the grommet through the casing from the outside GROMMET OR THE RUBBER ELBOW. Both of these until it is seated in the knockout pieces will be used. 6. Attach the plain end of the drain elbow to the outlet stub Assemble and route the drain line to the opposite side of the on the drain trap.
Page 18 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE 1/2−in. CPVC to 3/4−in. PVC adapter is supplied in the approved for use with acidic furnace condensate and loose parts bag for use as required. compatible with mineral and vegetable oils, such as canola oil. 15.
Page 19: Installation
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Figure 16 Formed Rubber Drain Grommet Figure 18 Furnace Pitch Requirements INSTALL CLAMPS ON DRAIN ELBOW LEVEL 0-IN. (0 MM) TO ATTACH DRAIN ELBOW TO CONDENSATE 1/2-IN. (13 MM) MAX DRAIN TRAP PULL DRAIN STUB MIN 1/4-IN.
Page 20: Downflow Installation
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Install another nut on other side of furnace base. (Install Figure 19 Removing Bottom Closure Panel flat washer if desired.) Adjust outside nut to provide desired height, and tighten inside nut to secure arrangement. Reinstall bottom closure panel if removed. DOWNFLOW INSTALLATION NOTE: The furnace must be pitched as shown in Figure 18 for proper condensate drainage.
Page 21: Return Air Connections
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE subbase, or a factory−approved air conditioning coil casing. DO The return−air duct must be connected to return−air opening NOT cut main furnace casing to attach supply side air duct, (bottom inlet) as shown in Figure 27. DO NOT cut into casing humidifier, or other accessories.
Page 22 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Table 5 Opening Dimensions − in. (mm) FURNACE PLENUM OPENING FLOOR OPENING CASING WIDTH APPLICATION IN. (mm) Upflow Applications on Combustible or Noncombustible Flooring 12−11/16 21−5/8 13−5/16 22−1/4 (subbase not required) (322) (549) (338) (565) Downflow Applications on Noncombustible Flooring 12−9/16 13−3/16...
Page 23: Horizontal Installation
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Bottom Return Air Inlet CAUTION These furnaces are shipped with bottom closure panel installed in bottom return−air opening. Remove and discard this panel MINOR PROPERTY HAZARD when bottom return air is used. To remove bottom closure Failure to follow this caution may result in minor property panel, perform the following: damage.
Page 24: Bottom Return Air Inlet
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Figure 26 Working Platform for Attic Installation COMBUSTION − AIR PIPE (SEE VENTING SECTION) 2−in. (51 mm) ROLLOUT PROTECTION RE- QUIRED Install 1.2” x 22” (305 x 559 mm) sheet metal in front of burner compartment area.
Page 25: Filter Arrangement
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Filter Arrangement Filter and Return Duct Sizing WARNING Pressure drop must be taken into account when sizing filters, filter racks, IAQ devices, and associated system ductwork. See Table 7 for a comparison of Pressure Drop (initial/clean FIRE, CARBON MONOXIDE AND POISONING...
Page 26 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Table 7 Filter Media Pressure Drop (Clean) Versus Airflow - in. w.c. (Pa) Representative After-Market Filter Media* Factory-Accy Fiberglass* Pleated* 14 x 25 Filter Washable (1-in. / 2.5 cm) (1-in. / 2.5 cm) (2-in. / 5 cm) (1-in.
Page 27 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE External Filter Cabinet Configurations Downflow Return Air Figure 27 Configurations and Restrictions Figure 30 Accessory Bottom Filter Rack L10F033 Upflow Return Air Configurations Figure 28 and Restrictions L10F031 22−5/16 (566.4) 28−7/16 (722.2) L10F032 Horizontal Return Air Figure 29 Configurations and Restrictions HORIZONTAL TOP...
Page 28: Air Ducts
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Systems Design Guidelines reference tables available from Figure 31 Accessory Side Filter Rack your local distributor. The duct system should be sized to handle the required system design CFM at the design external static pressure. The furnace airflow rates are provided in the Service and Technical Support Manual.
Page 29 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE WARNING Table 10 Maximum Capacity of Pipe NOMINAL LENGTH OF PIPE − FT (M) INTERNAL IRON PIPE FIRE OR EXPLOSION HAZARD DIA. SIZE IN. (MM) (3.0) (6.0) (9.1) (12.1) (15.2) Failure to follow this warning could result in personal IN.
Page 30: Electrical Connections
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE ELECTRICAL CONNECTIONS Figure 33 Gas Valve − Single Stage ON/OFF Switch WARNING 1/2” NPT Inlet ELECTRICAL SHOCK, FIRE EXPLOSION Regulator Seal Cap HAZARD Regulator Adjustment Failure to follow safety warnings could result in Regulator Seal Cap under Cap dangerous operation, serious injury, death or property damage.
Page 31: J−Box Installation
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE 115−V Wiring WARNING Furnace must have a 115-v power supply properly connected and grounded. FIRE HAZARD NOTE: Proper polarity must be maintained for 115-v wiring. If Failure to follow this warning could result in personal polarity is incorrect, control status indicator light flashes rapidly injury, death, or property damage.
Page 32 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Pull furnace power wires through 1/2-in. (12 mm) Figure 36 Optional J−Box Locations diameter hole in J−Box. If necessary, loosen power wires from strain−relief wire-tie on furnace wiring harness. Connect any code required external disconnect(s) to field power wiring.
Page 33: Alternate Power Supplies
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE BX Cable Installation in Furnace J−Box male 1/4−in quick−connect terminals on the control board marked EAC and NEUTRAL. The terminals are 1. Install J−Box mounting bracket to inside of furnace rated for 115 VAC, 1.0 amps maximum and are casing.
Page 34 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Figure 39 Isolation Relay for Humidifiers with Internal Power Supply To HUM 24 VAC Terminal To Humidifier Leads On Furnace Control Board 24 V Coil To Humidifier Leads To C Screw Terminal on Thermostat Strip A11157 Figure 40 Example of Single Stage Furnace Control for PSC Blower Motor...
Page 35: Venting
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE VENTING PVC/CPVC, Purple pour évacuation des gaz de combustion et système IPEX 636(1)t, ciment PVC pour évacuation des gaz NOTE: Planning for the venting system should be done in de combustion, coté classe IIA, 65 deg C. doivent être utilisés conjunction with planning for the ductwork, drainage, and avec le système d’évacuation IPEX 636 –...
Page 36 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE General Venting Systems If this furnace replaces a furnace that was connected to a vent WARNING system or chimney, the vent or vent connectors of other remaining appliances may need to be re−sized. Vent systems or vent connectors of other appliances must be sized to the CARBON MONOXIDE POISONING HAZARD minimum size as determined using appropriate table found in...
Page 37 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE attenuation. To aid sound attenuation, point the inlet air pipe NOTICE away from occupants. An extra elbow and/or five feet (1.5 M) of pipe may be used to accomplish the sound attenuation OPTIONAL CONFIGURATION FOR COMBUSTION function.
Page 38 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Table 13 Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials (U.S.A. Installation) ASTM SPECIFICATION SOLVENT CEMENT AND MATERIAL PIPE FITTINGS DESCRIPTION (MARKED ON PRIMERS MATERIAL) Pipe − − Schedule−40 D1527 Pipe − − Schedule−40 D1785 For ABS −...
Page 39: Direct Vent / 2−Pipe System
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Locating the Vent Termination WARNING General CARBON MONOXIDE POISONING HAZARD NOTE: Termination Requirements for the Provinces of Failure to follow the instructions outlined below for Alberta and Saskatchewan are located at the end of this each appliance being placed into operation could result section.
Page 40 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE or tee, certified to ULC S636 from the adjacent property line Figure 46 Vent Terminations must be used. (See Figure 44 and Figure 46) The concentric vent kit currently cannot be modified to attach an elbow to the vent portion of the rain cap. A tee attached to the rain cap could potentially direct the flue gas plume toward the intake air stream and contaminate the incoming combustion air for the furnace.
Page 41 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Figure 47 Combustion Air and Vent Pipe Termination for Direct Vent (2−Pipe) System Roof Termination (Preferred) Note: 36−in. separation between pairs of inlets only required for direct−vent systems Note: Vertical separation between At least 36 in. “A”...
Page 42 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Size the Vent and Combustion Air Pipes furnace. Connecting a drain line to the trap is optional as trace amounts of moisture will evaporate into the intake air stream. If General the combustion air inlet is located near a moisture exhaust duct, or there are other concerns of excessive moisture being Approved 2−pipe drawn into the combustion air inlet, it is encouraged to connect...
Page 43 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE 3. For each pipe, multiply the number of elbows by the b. If the Total Vent Length is longer than the Maximum equivalent length for the type of elbow used. Record the Equivalent Vent Length for the diameter of pipe equivalent length of all the elbows for each pipe.
Page 44: Configure The Furnace
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Configure the Furnace Figure 52 Upflow Configurations WARNING CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in personal injury or death. To route the vent pipe and combustion air pipe through the furnace, the manufacturer supplied kit must be used.
Page 45 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Figure 53 Downflow Configurations Figure 54 Horizontal Left Configurations HORIZONTAL LEFT − VERTICAL VENT CONFIGURATION DOWNFLOW LEFT − VENT CONFIGURATION Representative drawing only, some models may vary in appearance. Representative drawing only, some models may vary in appearance. A11311 DOWNFLOW RIGHT −...
Page 46 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE NOTES: Figure 55 Horizontal Right Configurations 1. Attach vent pipe adapter with gasket to furnace casing. 2. Align notches in rubber coupling over standoffs on adapter. Slide clamps over the coupling. 3. Slide vent pipe through adapter and coupling into vent elbow.
Page 47 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE 5. Insert a length of vent pipe through the coupling into the Figure 48, Alberta Figure 44 and Figure 46. For ventilated combustion terminations, refer outlet of the vent elbow. Figure 48, Alberta Figure 44 and Figure 46. 6.
Page 48: Installing The Vent Termination
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE NOTE: Follow the instructions of the vent terminal WARNING manufacturer. These instructions are provided as a reference only. CARBON MONOXIDE POISONING HAZARD Cut one 4−in. (102 mm) diameter hole for 2−in. (50 mm ND) kit, Failure to follow this warning could result in personal or one 5−in.
Page 49 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE 5. Disassemble loose pipe fittings. Clean and cement using 4. Disassemble loose pipe fittings. Clean and cement using same procedures as used for system piping. DO NOT same procedures as used for system piping. DO NOT CEMENT POLYPROPYLENE FITTINGS.
Page 50 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Figure 57 Crawl Space Vent Termination Ventilated Combustion Air intake pipe Pipe hangar 3” (76 mm) 12” (305 mm) Ventilated Combustion Air intake termination in crawl space CRAWL SPACE Figure 58 Attic Vent Termination Ventilated Combustion Air intake pipe Vent through roof flashing...
Page 51 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Figure 59 Direct Vent Termination Clearance 25−24−65−2 NOTE: The following is based upon National codes for gas appliances, and is provided as a reference. Refer to Local codes which may supersede these standards and/or recommendations. (1 ) (2 ) Canadian Installations...
Page 52 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Figure 60 Other than Direct Vent Clearance − Ventilated Combustion Air Option 25−24−65−2 NOTE: The following is based upon National codes for gas appliances, and is provided as a reference. Refer to Local codes which may supersede these standards and/or recommendations. (1 ) (2 ) Canadian Installations...
Page 53: Maximum Equivalent Vent Length
INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Table 14 MAXIMUM EQUIVALENT VENT LENGTH - Feet (Meters) Note: Maximum Equivalent Vent Length (MEVL) does NOT include elbows or terminations Use Table 15 − DEDUCTIONS FROM MEVL to determine allowable vent length for each application. DIRECT VENT (2-PIPE) AND NON-DIRECT VENT (1-PIPE) Vent Pipe Diameter (in.) Altitude...
Page 54 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Example 1 A direct-vent 60,000 BTUH furnace installed at 2100 ft. (640M). Venting system includes FOR EACH PIPE 100 feet (30 M) of vent pipe, 95 feet (28 M) of combustion air inlet pipe, (3) 90º long-radius elbows, (2) 45º long-radius elbows, and a factory accessory concentric vent kit.
Page 55 INSTALLATION INSTRUCTIONS Gas Furnace: N9MSE Table 16 MAXIMUM EQUIVALENT VENT LENGTH - Feet (Meters) Note: Maximum Equivalent Vent Length (MEVL) does NOT include elbows or terminations. Use DEDUCTIONS FROM MEVL − Table 15 to determine allowable vent length for each application. Note: Vent sizing for Canadian installations over 4500 ft.
Page 56: Maximum Allowable Exposed Vent Length
3.0 18.6 14.3 27.4 46.6 27.4 55.8 140,000 -20 (-30) 3.0 10.7 27.4 31.7 27.4 39.0 -40 (-40) 27.4 22.9 27.4 28.7 Specifications subject to change without notice. 440 01 4103 03 Copyright 2013 International Comfort Products Lewisburg, TN 37091 USA...

International comfort products N9MSE Series Installation Instructions Manual

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