Carrier N92MSN Installation, Start-Up, Operating And Service And Maintenance Instructions
Carrier N92MSN Installation, Start-Up, Operating And Service And Maintenance Instructions

Carrier N92MSN Installation, Start-Up, Operating And Service And Maintenance Instructions

Single-stage, 35-in. (889 mm) tall, 4-way multipoise high efficiency condensing gas furnace

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N92MSN
Single-Stage, 35-in. (889 mm) Tall, 4-Way Multipoise
High Efficiency Condensing Gas Furnace
NOTE: Read the entire instruction manual before starting the
installation.

TABLE OF CONTENTS

IMPORTANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Table 1 - Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 2 - Minimum Clearances to Combustible Materials
for All Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 3 - Loose Parts Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
CODES AND STANDARDS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS PROCE-
DURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
AIR FOR COMBUSTION AND VENTILATION . . . . . . . . . . . . . . 8
Table 4 - Minimum Free Area Required for Each Combustion Air
Opening or Duct to Outdoors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 5 - Minimum Space Volumes for 100% Combustion, Ventila-
tion and Dilution Air from Outdoors . . . . . . . . . . . . . . . . . . . . . . . 9
CONDENSATE TRAP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
CONDENSATE DRAIN CONNECTION . . . . . . . . . . . . . . . . . . . . 13
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 6 - Opening Dimensions - In. (mm) . . . . . . . . . . . . . . . . . 18
FILTER ARRANGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 7 - Filter Media Pressure Drop (Clean) Versus Airflow - in. w.c.
(Pa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 8 - Filter Media Pressure Drop (Clean) Versus Airflow - in. w.c.
(Pa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 9 - Filter Media Pressure Drop (Clean) Versus Face Velocity-
in. w.c. (Pa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 10 - Air Filter Selection and Duct Sizing - In. (mm) . . . . 20
AIR DUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
GAS PIPING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 11 - Maximum Capacity of Pipe . . . . . . . . . . . . . . . . . . . . 23
ELECTRICAL CONNECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 12 - Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
ACCESS0RIES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
VENTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 13 - Vent Termination Kit for Direct Vent (2-pipe) Systems29
Table 14 - Approved Combustion-Air and Vent Pipe, Fitting and Ce-
ment Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 15 - Maximum Equivalent Vent Length . . . . . . . . . . . . . . 38
Table 16 - Deductions from Maximum Equivalent Vent Length - Ft.
(M) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Portions of the text and tables are reprinted from NFPA 54/ANSI Z223.1E, 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
Installation, Start-up, Operating and
Service and Maintenance Instructions
on the referenced subject, which is represented only by the standard in its entirety.
Table 17 - Maximum Allowable Exposed Vent Lengths in Uncondi-
tioned Space Table - Ft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Table 18 - Hanger Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
AIR DELIVERY - CFM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table 19 - Air Delivery - CFM (with filter) . . . . . . . . . . . . . . . . 47
Table 20 - Airflow Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Table 21 - System Status Display Codes . . . . . . . . . . . . . . . . . . 50
Table 22 - Main Menu Options . . . . . . . . . . . . . . . . . . . . . . . . . . 50
SERVICE LABEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 23 - Test Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 24 - Altitude Derate Multiplier for U.S.A. . . . . . . . . . . . . 55
Table 25 - Gas Rate (CU ft./hr). . . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 26 - Orifice Size and Manifold Pressure (in. w.c.) for Gas Input
Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
SERVICE AND MAINTENANCE PROCEDURES. . . . . . . . . . . . 58
CARE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
WINTERIZATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
PARTS REPLACEMENT INFORMATION GUIDE . . . . . . . . . . . 71
MODEL NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
To learn more about this appliance and installation via a mobile device,
go to
http://www.fasthvacrparts.com/NFC
access airflow tables or troubleshooting guide on your mobile device go
to
mlctraining.com/training/techdocs/45/
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 .
or use the QR code below. To
or use the QR code below.
A220944
A200326

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Summary of Contents for Carrier N92MSN

  • Page 1: Table Of Contents

    N92MSN Single-Stage, 35-in. (889 mm) Tall, 4-Way Multipoise High Efficiency Condensing Gas Furnace Installation, Start-up, Operating and Service and Maintenance Instructions NOTE: Read the entire instruction manual before starting the Table 17 – Maximum Allowable Exposed Vent Lengths in Uncondi- tioned Space Table - Ft.
  • Page 2: Required Notice For Massachusetts Installations

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions 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.
  • Page 3: Safety Considerations

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions NOTE: ALL DIMENSIONS IN INCH (MM) SD5663-4 REV. - A210796 Fig. 1 – Dimensional Drawing Table 1 – Dimensions SHIP WT. FURNACE SIZE CABINET WIDTH OUTLET WIDTH BOTTOM INLET WIDTH AIR INTAKE...
  • Page 4 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions WARNING WARNING FIRE, EXPLOSION, ELECTRICAL SHOCK, AND PERSONAL INJURY AND PROPERTY DAMAGE CARBON MONOXIDE POISONING HAZARD HAZARD Failure to follow this warning could result in dangerous operation, Failure to follow this warning could result in property damage, personal personal injury, death, or property damage.
  • Page 5: For All Units

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions 2. Install this furnace only in a location and position as specified in the NOTICE “Location” section of these instructions. 3. Provide adequate combustion and ventilation air to the furnace Important Installation and Start-up Procedures space as specified in “Air for Combustion and Ventilation”...
  • Page 6: Codes And Standards

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Refrigerating, and Air-Conditioning Engineers; or other approved WARNING engineering method to calculate heating load estimates and select the furnace. Excessive oversizing of the furnace may cause the furnace FIRE, INJURY OR DEATH HAZARD and/or vent to fail prematurely, customer discomfort and/or vent freezing.
  • Page 7: Dure

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Duct Systems 6. Before removing a new control from its container, discharge your body’s electrostatic charge to ground to protect the control from • US and CANADA: Current edition of Air Conditioning Contractors damage.
  • Page 8: Air For Combustion And Ventilation

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions CAUTION CAUTION PERSONAL INJURY AND/OR PROPERTY FURNACE RELIABILITY HAZARD DAMAGE HAZARD Failure to follow this caution may result in nuisance limit switch cycling and unit component damage. Improper use or installation of this furnace may result in premature furnace component failure.
  • Page 9 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Outdoor Combustion Air Method WARNING 1. Provide the space with sufficient air for proper combustion, ventilation, and dilution of flue gases using permanent horizontal or CARBON MONOXIDE POISONING HAZARD vertical duct(s) or opening(s) directly communicating with the Failure to follow this warning could result in personal injury or death.
  • Page 10 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Indoor Combustion Air NFPA & AGA Standard and Known-Air-Infiltration Rate Methods Indoor air is permitted for combustion, ventilation, and dilution, if the Standard or Known-Air-Infiltration Method is used. WARNING CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in personal injury or death.
  • Page 11: Condensate Trap

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions communicating spaces if connected by one or more permanent as received from the factory. See the top image in Fig. 9. When the openings in doors or floors having free area of at least 2 furnace is installed in the downflow orientation, the condensate trap in.2/1,000 BTUh (4,400 mm2/kW) of total input rating of all gas...
  • Page 12 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions To Relocate the Condensate Trap: Remove the screw that secures the condensate trap to the collector box • Orient the furnace in the downflow position. If alternate vent position and remove trap.
  • Page 13: Condensate Drain Connection

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions from sagging or being dislocated from the furnace or termination point. NOTICE In the absence of local codes, consult the current edition of the National Standard Plumbing Code, in the current edition of U.S. or the National The field-supplied, accessory horizontal drain trap grommet is ONLY Plumbing Code of Canada in Canada.
  • Page 14 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions A220966 Top View Drain Elbow “Z” Discharge Pipe for Left Side L12F019B Drain is Routed behind Inducer CAUTION CUT HAZARD Failure to follow this caution may result in personal injury. Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses and gloves when handling parts, and servicing furnaces.
  • Page 15: Installation

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions The remaining drain line can be constructed from field supplied 1/2-in. building codes. A factory-supplied 1/2-in. CPVC to 3/4-in. PVC CPVC or 3/4-in. PVC pipe, in compliance with local building codes. A adapter is supplied in the loose parts bag for use as required.
  • Page 16 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions A11237 Fig. 19 – Furnace Pitch Requirements Supply Air Connections For a furnace not equipped with a cooling coil, the outlet duct shall be provided with a removable access panel. This opening shall be...
  • Page 17 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions CAUTION CUT HAZARD Failure to follow this caution may result in personal injury. Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses and gloves when handling parts, and servicing furnaces.
  • Page 18 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Return Air Connections hung from floor joists, rafters or trusses or installed on a non-combustible platform, blocks, bricks or pad. CAUTION Supply Air Connections For a furnace not equipped with a cooling coil, the outlet duct shall be FURNACE RELIABILITY HAZARD provided with a removable access panel.
  • Page 19: Filter Arrangement

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Refer to the instructions supplied with the Filter Rack or accessory air filter for assembly and other details. FURNACE FURNACE (OR COIL CASING WHEN USED) APPROVED COIL ASSEMBLY Due to the relatively high pressure drops of 1-in (25 mm) thick...
  • Page 20 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Table 7 – Filter Media Pressure Drop (Clean) Versus Airflow - in. w.c. (Pa) (Continued) Factory-Accy Representative After-Market Filter Media 20 x 25 Filter Washable Fiberglass Pleated (L/s) (1-in. / 2.5 cm) (1-in.
  • Page 21 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions 2. For each leg, install nut on bolt and then install bolt with nut in COMBUSTION - AIR PIPE (SEE VENTING SECTION) hole. (Install flat washer if desired.) 3. Install another nut on other side of furnace base. (Install flat washer if desired.)
  • Page 22: Air Ducts

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions AIR DUCTS GAS PIPING NOTICE WARNING Many states, provinces and localities are considering or have FIRE OR EXPLOSION HAZARD implemented standards and/or restrictions on duct sizing practices, Failure to follow this warning could result in personal injury, death, ductwork leakage, and/or ductwork thermal, airflow and electrical and/or property damage.
  • Page 23 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Gas entry can be from left or right side, or top panel. See Fig. 29 Refer to current edition of NSCNGPIC in Canada. After all connections Fig. have been made, purge lines and check for leakage at furnace prior to operating furnace.
  • Page 24: Electrical Connections

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions If pressure exceeds 0.5 psig (14-in. w.c.), gas supply pipe must be WARNING disconnected from furnace and capped before and during supply pipe pressure test. If test pressure is equal to or less than 0.5 psig (14-in. w.c.),...
  • Page 25 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions external electrical box. Do not leave splice connections unprotected CAUTION inside the furnace. FURNACE MAY NOT OPERATE HAZARD Failure to follow this caution may result in intermittent furnace operation. Furnace control must be grounded for proper operation or else control will lock out.
  • Page 26 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions 6. Pull the ground wire of the field line voltage wiring through the strain-relief bushing into the furnace casing. 7. Install the green ground screw to the J-Box bracket and attach both ground wires to the green ground screw.
  • Page 27: Access0Ries

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions could cause this fuse to blow. If fuse replacement is required, use ONLY Power from an alternate power supply that is non-sinusoidal may a 3-amp. fuse of identical size. See Fig.
  • Page 28: Venting

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions 6. When connecting 115 VAC to humidifier use a separate 115 VAC Under this standard, it is recommended that the vent system be checked once a year by qualified service personnel.
  • Page 29 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions NOTICE RECOMMENDED SUPPORT FOR VENT TERMINATION It is recommended that sidewall vent terminations of over 24 inches (0.6 M) in length or rooftop vent terminations of over 36 inches (1 M)
  • Page 30 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions the exhaust gases from one appliance from contaminating the WARNING combustion air of other gas appliances. Do not take combustion air from inside the chimney when using CARBON MONOXIDE POISONING HAZARD ventilated combustion air or single-pipe vent option.
  • Page 31 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions outdoor atmosphere. Air for combustion must be supplied as described radius 90 degree elbow is required to be attached to the combustion air in the Air For Combustion and Ventilation Section. Do not use an pipe adapter on the furnace.
  • Page 32 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions A190032 Fig. 41 – Inside Corner Termination Inside Corner Terminations Inside corner vent terminations are permitted provided that: • Only two exterior walls come together to form an angle of 90 degrees to 135 degrees. There are no other exterior walls attached to either wall to form an alcove.
  • Page 33 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions A12326 Fig. 42 – Direct Vent Termination Clearance 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.
  • Page 34 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions A12325 Fig. 43 – Ventilated Combustion Air and Non-Direct Vent Termination Clearance 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.
  • Page 35 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions 2. The vent termination must be located at least 3 feet from an inside WARNING corner and follow the clearance distances in the Inside Corner Termination drawing. See Fig. CARBON MONOXIDE POISONING HAZARD 3.
  • Page 36 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions If the unobstructed distance from the foundation to the property line of the adjacent lot is no less than 4 ft. (1.2 M) and no greater than 8 ft. (2.4 M), it will be necessary to re-direct the flue gas plume. In this situation, a concentric vent kit cannot be used.
  • Page 37 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Recommended to prevent moisture from trickling into the furnace vestibule, a trap can be installed in the intake air pipe near the furnace. To prevent moisture, connecting a drain line to the trap is recommended as trace amounts of moisture will evaporate into the intake air stream.
  • Page 38 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions 3. For each pipe, multiply the number of elbows by the equivalent 6. When using polypropylene venting systems with flexible vent length for the type of elbow used. Record the equivalent length of pipes, perform adjustments for the equivalent length of the flexible all the elbows for each pipe.
  • Page 39 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions A13110 Table 16 – Deductions from Maximum Equivalent Vent Length - Ft. (M) Pipe Diameter (in): 1-1/2 2-1/2 (2.4) (2.4) (2.4) (2.4) (2.4) Mitered 90º Elbow (1.5) (1.5) (1.5) (1.5) (1.5) Medium Radius 90º...
  • Page 40 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions 1. Loosen the clamp on the inlet of the vent elbow attached to the inducer. 2. Rotate the vent elbow to the required position. There are rounded notches on the vent elbow to align it with the inducer housing for each orientation.
  • Page 41 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions HORIZONTAL LEFT-RIGHT VENT CONFIGURATION Fig. 55 – Horizontal Left (Appearance may vary) See “Notes for Venting Options” Requires Accessory Internal Vent Kit. See Product Data for current kit number. A11313A DOWNFLOW VERTICAL A11337 Fig.
  • Page 42 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Table 17 – Maximum Allowable Exposed Vent Lengths in Unconditioned Space Table - Ft. 40,000* BTUH 60,000 BTUH Unit Size 3/8-in. 1/2-in. Uninsulated Uninsulated 3/8-in. Insulation 1/2-in. Insulation Winter Insulation Insulation Design Pipe Dia.
  • Page 43 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions 120,000 BTUH 140,000 BTUH Unit Size Uninsulated 3/8-in. Insulation 1/2-in. Insulation Uninsulated 3/8-in. Insulation 1/2-in. Insulation Winter Pipe Dia. Design Temp 15.2 12.2 22.9 28.9 22.9 32.0 16.7 15.2 19.8 32.0 19.8...
  • Page 44 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Table 18 – Hanger Spacing 2. Slide the plastic vent pipe adapter over the length of the vent pipe down to the furnace casing. Mark the pipe where it is flush with the Material outlet of the adapter.
  • Page 45 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Two-Pipe and Single-Pipe Terminations 2. Loosely install elbow in bracket (if used) and place assembly on combustion-air pipe. Single and two pipe vent must be installed as shown in Fig. 39 3.
  • Page 46 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Venting System Length Calculations The Total Equivalent Vent Length (TEVL) for EACH combustion air or vent pipe equals the length of the venting system, plus the equivalent length of elbows used in the venting system from Table Standard vent terminations or factory accessory concentric vent terminations count for zero deduction.
  • Page 47: Air Delivery - Cfm

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions AIR DELIVERY - CFM Table 19 – Air Delivery - CFM (with filter) External Static Pressure (IN.W.C.) Airflow Default Unit Size Setting Setting Cont. Fan Heat 0401412 1040 1010 1085 1055...
  • Page 48 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Table 19 – Air Delivery - CFM (with filter) (Continued) Airflow Default External Static Pressure (IN.W.C.) Unit Size Setting Setting Cont. Fan Heat 0601714 1010 1065 1015 1135 1085 1040 1195...
  • Page 49: Furnace Control Programming And Navigation

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Table 19 – Air Delivery - CFM (with filter) (Continued) Airflow Default External Static Pressure (IN.W.C.) Unit Size Setting Setting Cont. Fan 1070 1145 1075 1005 1240 1175 1115 1045 1330...
  • Page 50 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions This furnace model is equipped with an on-board 3-digit LCD display The system’s status is displayed after startup or after no control buttons with pushbutton navigation for the adjustment of operating parameters, have been pressed for 60 seconds.
  • Page 51 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions CAUTION FURNACE OVERHEATING HAZARD Failure to follow this caution could result in reduced furnace life. Do NOT program the control board with a Model Program Number different than what is specified on the rating plate. Parameter options will not match design values.
  • Page 52: Service Label

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions SERVICE LABEL Scan QR code or reference troubleshooting guide in installation manual. Scroll through main menu by pressing the MENU/SELECT button. The major status code is displayed in the first 2 digits of the display. The minor status Press NEXT/OPTION button to view current setting (will flash on code is displayed in the third digit .
  • Page 53: Wiring Diagram

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions c. To initiate the component test sequence, the control must be in CAUTION (idL) mode. no thermostat demands (W, Y, G). Select component test (Ct) from menu select buttons to start the...
  • Page 54: Adjustments

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Prime Condensate Trap with Water WARNING WARNING FIRE OR EXPLOSION HAZARD CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in personal injury, death, and/or property damage. Failure to follow these warnings could result in personal injury or Never purge a gas line into a combustion chamber.
  • Page 55 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Therefore: Orifice No. 44 NOTICE Manifold pressure: 3.4-in. w.c. (847 Pa) (Furnace is shipped with No. 44 orifices. In this example, all main The NATURAL GAS manifold pressure adjustments in Table 26 burner orifices are the correct size and do not need to be changed to compensate for BOTH altitude AND gas heating value.
  • Page 56 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Table 25 – Gas Rate (CU ft./hr) NOTICE SIZE OF TEST DIAL SIZE OF TEST DIAL SEC. SEC. FOR 1 1 Cu 2 Cu 5 Cu FOR 1 1 Cu 2 Cu 5 Cu DO NOT set manifold pressure less than 2.8-in.
  • Page 57 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Table 26 – Orifice Size and Manifold Pressure (in. w.c.) for Gas 3. Restore furnace to normal operating condition. Input Rate a. Turn gas valve ON/OFF switch to OFF. b. Remove water column manometer or similar device from SINGLE-STAGE FURNACE manifold pressure tap.
  • Page 58: Service And Maintenance Procedures

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Checklist WARNING • Put away tools and instruments. Clean up debris. • Check Input/Output gas pressure FIRE HAZARD • Check heat rise per application static pressure Failure to follow this warning could result in personal injury, death, •...
  • Page 59: Care And Maintenance

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions GENERAL CAUTION These instructions are written as if the furnace is installed in an upflow application. An upflow furnace application is where the blower is SHOCK HAZARD located below the combustion and controls section of the furnace, and Failure to follow this caution could result in personal injury.
  • Page 60 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions 4. If equipped with permanent, washable filter, clean filter by spraying WARNING cold tap water through filter in opposite direction of airflow. Rinse filter and let dry. Oiling or coating of the filter is not recommended.
  • Page 61 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions 8. Reassemble motor and blower wheel by reversing items 7b through 7f. Ensure wheel is positioned for proper rotation. 9. Torque motor mounting bolts to 40 +/- 10 lb-in. when reassembling.
  • Page 62 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions 11. Remove the four screws that attach the top plate of the casing to the 15. Turn gas on at electric switch on gas valve and at external shut-off furnace. or meter 12.
  • Page 63 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions d. If replacement is required, remove the screw that secures the 7. Remove the screw that secures the condensate trap to the collector igniter on igniter bracket and remove the igniter.
  • Page 64: Winterization

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions NOTE: After cleaning, inspect the heat exchangers to ensure they are WARNING free of all foreign objects that may restrict flow of combustion products. 8. Reverse items 6 through 1 for reassembly.
  • Page 65: Sequence Of Operation

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions 11. If a condensate pump is used, check with pump manufacturer to Simultaneously, the electronic air cleaner terminal EAC-1 is verify pump is safe for use with antifreeze used. Allow pump to energized and remains energized as long as the blower motor start and pump anti-freeze to open drain.
  • Page 66 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions Troubleshooting Refer to the service label (see Fig. 60). The Troubleshooting Guide (see Fig. 71) can be a useful tool in isolating furnace operation problems. Beginning with the word “Start,” answer each question and follow the appropriate arrow to the next item.
  • Page 67: Troubleshooting

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions TROUBLESHOOTING A221116 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 68 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions A221119 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 69 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions A221120 Fig. 71 – Troubleshooting Guide Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 70 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions GAS FURNACE CHECKLIST Installation Date: ____________________________ Equipment Model Serial # Furnace Thermostat Humidifier Indoor Coil Outdoor Unit Furnace Location_____________________________ Installed altitude __________________ Furnace Orientation: ____Upflow ____Downflow ____Horizontal Right ____Horizontal Left Gas Adjustment LOCAL GAS HEAT CONTENT_____________(btu/cu.
  • Page 71: Parts Replacement Information Guide

    N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions PARTS REPLACEMENT INFORMATION GUIDE Casing Group Filter Group Blower door Filter(s) Bottom plate Media Cabinet (when used) Gas Control Group Control door Door knob assembly Burner Top filler plate Flame sensor...
  • Page 72 N92MSN: Installation, Start-up, Operating and Service and Maintenance Instructions © 2022 Carrier. All rights reserved. Edition Date: 08/22 Catalog No: N92MSN2-01SI REV B A Carrier Company Replaces: N92MSN2-01SI REV A Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

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