Carrier F97CMN Installation, Start-Up, Operating And Service And Maintenance Instructions

Modulating, high efficiency condensing gas furnace, 4-way multipoise

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F97CMN and G97CMN
Modulating, High Efficiency Condensing
Gas Furnace, 4-Way Multipoise
Installation, Start-up, Operating and Service
NOTE: Read the entire instruction manual before starting the installation.

TABLE OF CONTENTS

Required Notice for Massachusetts Installations . . . . . . . . . . . . . . . . 2
IMPORTANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 1 - Minimum Clearances to Combustible Materials for All Units
4
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 2 - Loose Parts Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CODES AND STANDARDS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
DURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3 - Minimum Free Area Required for Each Combustion Air
Opening or Duct to Outdoors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 4 - Minimum Space Volumes for 100% Combustion, Ventila-
tion and Dilution Air from Outdoors . . . . . . . . . . . . . . . . . . . . . . . 9
CONDENSATE TRAP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
CONDENSATE DRAIN CONNECTION . . . . . . . . . . . . . . . . . . . . 11
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 5 - Opening Dimensions - In. (mm) . . . . . . . . . . . . . . . . . 16
Table 6 - Filter Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
AIR DUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 7 - Cooling4 and Heating Air Delivery - CFM (Bottom Return5
With Filter). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
GAS PIPING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 8 - Maximum Capacity of Pipe . . . . . . . . . . . . . . . . . . . . . 24
ELECTRICAL CONNECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 9 - Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
VENTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 10 - Vent Termination Kit for Direct Vent (2-pipe) Systems33
Table 11 - Maximum Equivalent Vent Length - Ft. . . . . . . . . . . 41
Table 12 - Deductions from Maximum Equivalent Vent Length - Ft.
(M) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Table 13 - Maximum Allowable Exposed Vent Lengths Insulation Ta-
ble. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Maximum Allowable Exposed Vent Length in Unconditioned Space - Ft.
45
Maximum Allowable Exposed Vent Length in Unconditioned Space -
Meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 14 - Hanger Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table 15 - Approved Combustion-Air and Vent Pipe, Fitting and Ce-
ment Materials (U.S.A. Installations) . . . . . . . . . . . . . . . . . . . . . 49
Table 16 - Altitude Derate Multiplier for U.S.A.* . . . . . . . . . . . 54
Table 17 - Gas Rate (CU ft./hr). . . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 18 - Blower Off Delay Setup Switch . . . . . . . . . . . . . . . . 57
Table 19 - Orifice Size and Manifold Pressure (In. W.C.) for Gas Input
Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 20 - Orifice Size and Manifold Pressure (In. W.C.) for Gas Input
and Maintenance Instructions
Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Winterization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
PARTS REPLACEMENT INFORMATION GUIDE . . . . . . . . . . . 78
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury and/or
death.
Carbon Monoxide (CO) is a colorless, odorless, and tasteless poisonous
gas that can be fatal when inhaled. Follow all installation, maintenance,
and service instructions. See additional information below regarding
the installation of a CO Alarm.
Most states in the USA and jurisdictions in Canada have laws thatrequire
the use of Carbon Monoxide (CO) alarms with fuel burning products.
Examples of fuel burning products are furnaces, boilers, space heaters,
generators, water heaters, stoves/ranges, clothes dryers, fireplaces,
incinerators, automobiles, and other internal combustion engines. Even
if there are no laws in your jurisdiction requiring a CO Alarm, it's highly
recommended that whenever any fuel burning product is used in or
around the home or business that the dwelling be equipped with a CO
Alarm(s). The Consumer Product Safety Commission recommends the
use of CO Alarm(s). The CO Alarm(s) must be installed, operated, and
maintained according to the CO Alarm manufacturer's instructions. For
more information about Carbon Monoxide, local laws, or to purchase a
CO
Alarm
online,
please
https://www.kidde.com.
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 .
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 on the referenced subject, which is represented
only by the standard in its entirety.
visit
the
following
website.
A200326

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Summary of Contents for Carrier F97CMN

  • Page 1: Table Of Contents

    F97CMN and G97CMN Modulating, High Efficiency Condensing Gas Furnace, 4-Way Multipoise Installation, Start-up, Operating and Service and Maintenance Instructions NOTE: Read the entire instruction manual before starting the installation. TABLE OF CONTENTS Rate ..........61 SERVICE AND MAINTENANCE Required Notice for Massachusetts Installations .
  • Page 2: Required Notice For Massachusetts Installations

    F97CMN and G97CMN: 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

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions A180203 SHIP WT. FURNACE SIZE BOTTOM LB (KG) CABINET WIDTH OUTLET WIDTH AIR INTAKE INLET WIDTH 0601714 17-1/2 (445) 15-7/8 (403) 16 (406) 8-3/4 (222) 139.5 (63.3) 0602120 21 (533)
  • Page 4 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions NOTICE are used to highlight suggestions which will result in enhanced WARNING installation, reliability, or operation. 1. Use only with type of gas approved for this furnace. Refer to the FIRE HAZARD furnace rating plate.
  • Page 5: Introduction

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Failure to follow these guidelines is considered faulty installation and/or NOTICE misapplication of the furnace; and resulting failure, damage, or repairs may impact warranty coverage. For accessory installation details, refer to the applicable instruction Important Installation and Start-up Procedures literature.
  • Page 6: Codes And Standards

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Acoustical Lining and Fibrous Glass Duct WARNING • US and CANADA: Current edition of SMACNA, NFPA 90B as tested by UL Standard 181 for Class I Rigid Air Ducts...
  • Page 7: Accessories

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions ACCESSORIES WARNING See Specification Sheet for a list of accessories for this product. LOCATION CARBON MONOXIDE POISONING / COMPONENT DAMAGE HAZARD General Failure to follow this warning could result in personal injury or death These furnaces are shipped with materials to assist in proper furnace and unit component damage.
  • Page 8 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Outdoor Combustion Air Method areas, the combustion air pipe must terminate outdoors as a Direct Vent/ 2-Pipe system. 1. Provide the space with sufficient air for proper combustion, All air for combustion is piped directly to the furnace from a space that is...
  • Page 9: Condensate Trap

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions 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 Ft3 (M3) 1,050 (29.7)
  • Page 10 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Condensate Trap-Horizontal Orientation • Fig. 9 shows the condensate trap and tubing before and after relocation in the horizontal left position. When the furnace is installed in the horizontal right position, the •...
  • Page 11: Condensate Drain Connection

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions CONDENSATE DRAIN CONNECTION of freezing, the drain trap and drain line must be protected. In areas where the temperature may be below 32° F (0° C), a Condensate Freeze CAUTION Protection kit is strongly recommended.
  • Page 12 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Evaporator Coil + + + + = Positive pressure < + = Pressure lower than areas with + − = Negative pressure Condensing Furnace Blower creates positive pressure. Positive pressure extends into coil condensate drain (no trap).
  • Page 13 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions CAUTION CUT HAZARD A170128 Fig. 15 – Drain Trap Connection and Routing Failure to follow this caution may result in personal injury. (Appearance may vary) Sheet metal parts may have sharp edges or burrs. Use care and wear...
  • Page 14: Installation

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions 13. Secure the rubber elbow to the drain trap and the Z-pipe with spring Allow at least 1/4-in. per foot (20 mm per meter) of slope down and clamps.
  • Page 15 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions PERFORATED DISCHARGE DUCT FLANGE UPFLOW DOWNFLOW 90° A11037 Fig. 21 – Downflow Return Air Configurations and Restrictions 120° 120° HORIZONTAL TOP RETURN NOT A10493A PERMITTED FOR Fig. 19 – Duct Flanges...
  • Page 16 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Side Return Air Inlet Bottom Return Air Inlet These furnaces are shipped with bottom closure panel installed in bottom These furnaces are shipped with bottom closure panel installed in bottom return-air opening.
  • Page 17 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions FURNACE FURNACE (OR COIL CASING WHEN USED) APPROVED COIL ASSEMBLY COIL BOX COMBUSTIBLE COMBUSTIBLE FLOORING FLOORING PLENUM OPENING DOWNFLOW SUBBASE SHEET METAL PLENUM FLOOR SHEET METAL PLENUM OPENING FLOOR...
  • Page 18 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Design the filter and associated ductwork for the best match of pressure supplied accessory air cleaner may also be used in place of the filter drop versus filter size. Best practice usually chooses filter systems with rack.
  • Page 19 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Leveling Legs (If Desired) COMBUSTION - AIR PIPE (SEE VENTING SECTION) In upflow position with side return inlet(s), leveling legs may be used, Fig. 27. Install field-supplied, 5/16 x 1-1/2 in. (8 x 38 mm) (max) corrosion-resistant machine bolts, washers and nuts.
  • Page 20: Air Ducts

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Roll-Out Protection Secure ductwork with proper fasteners for type of ductwork used. Seal supply- and return-duct connections to furnace with code approved tape Provide a minimum 12-in. x 22-in. (305 x 559 mm) piece of sheet metal or duct sealer.
  • Page 21: With Filter)

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Table 7 – Cooling and Heating Air Delivery - CFM (Bottom Return With Filter) (SW1-5 and SW4-3 set to OFF, except as indicated. See notes 1 and 2.) Unit Size: 0601714...
  • Page 22 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Table 7 – Cooling and Heating Air Delivery - CFM (Bottom Return With Filter) (Continued) (SW1-5 and SW4-3 set to OFF, except as indicated. See notes 1 and 2.)
  • Page 23 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Table 7 – Cooling and Heating Air Delivery - CFM (Bottom Return With Filter) (Continued) (SW1-5 and SW4-3 set to OFF, except as indicated. See notes 1 and 2.)
  • Page 24: Gas Piping

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions NOTES: 1.Nominal 350 CFM/ton cooling airflow is delivered with SW1-5 and SW4-3 set to OFF. Set SW1-5 to ON for nominal 400 CFM/ton (+15% airflow). Set SW4-3 to ON for nominal 325 CFM/ton (-7% airflow).
  • Page 25: Electrical Connections

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions When a flexible connector is used, black pipe shall be installed at the Piping should be pressure and leak tested in accordance with the current furnace gas control valve and extend a minimum of 2-in. (51 mm) addition of the NFGC in the United States, local, and national plumbing outside the furnace.
  • Page 26 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Verify that the voltage, frequency, and phase correspond to that specified on unit rating plate. Also, check to be sure that service provided by utility is sufficient to handle load imposed by this equipment. Refer to...
  • Page 27 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions The J-Box must be used when field line voltage electrical connections are made to the furnace wiring harness inside the furnace casing. The J-Box cover is not required if a field-supplied external electrical box is attached to the outside of the furnace casing.
  • Page 28 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions 7. Install the green ground screw to the J-Box bracket and attach both ground wires to the green ground screw. 8. Connect any code required external disconnect(s) to field power wiring.
  • Page 29 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions COMMUNICATION CONTINUOUS FAN OUTDOOR SW4 SETUP CONNECTOR (CF) AIRFLOW AIR TEMP SWITCHES SETUP SWITCHES CONNECTOR MODEL PLUG PL8 - MODULATING CONNECTOR GAS VALVE CONNECTOR SW1 SETUP SWITCHES AND BLOWER OFF-...
  • Page 30: Venting

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Accessories Special Venting Requirements for Installations in (See Fig. 36 Fig. 37.) Canada 1. Electronic Air Cleaner (EAC) Connect an accessory Electronic Air Cleaner (if used) using 1/4-in. Installation in Canada must conform to the requirements of CSA B149 female quick connect terminals to the two male 1/4-in.
  • Page 31 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Do not take combustion air from inside the chimney when using WARNING ventilated combustion air or single pipe vent option. These furnaces can be vented as either direct vent (two-pipe) or as CARBON MONOXIDE POISONING HAZARD ventilated combustion air system.
  • Page 32 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions ¾ in. (222mm) for 3 in. (76mm) ¾ in. (172mm) for 2 in. (51mm) 12 in. (305mm) min. separation between bottom of combustion air and bottom of vent (Typ.) A13305 Fig.
  • Page 33 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Table 10 – Vent Termination Kit for Direct Vent (2-pipe) Systems Approved Two-Pipe Termination Fittings Vent and Allowable Concentric Combustion Air Pipe 1 1/2-in. 2-in. 2 1/2-in. 3-in. 4-in.
  • Page 34 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions NOTICE RECOMMENDED SUPPORT FOR VENT TERMINATIONS It is recommended that sidewall vent terminations in excess of 24 inches (0.6 M) or rooftop terminations in excess of 36 inches (1 M) in...
  • Page 35 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions A12326 Fig. 40 – 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 36 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions A12325 Fig. 41 – 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.
  • Page 37 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Inside corner vent terminations are permitted provided that (Fig. 42): 4. For vent terminations located more than 6 feet (2 meters) from an inside corner, refer to the appropriate Direct Vent Clearance Table 1.
  • Page 38 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Direct Vent / 2-Pipe System The Provinces of Alberta and Saskatchewan require a minimum unobstructed distance of 4 ft. (1.2 M) from the foundation to the property Direct vent (2-pipe) vent and combustion air pipes must terminate line of the adjacent lot for vent termination of any appliance with an outside the structure.
  • Page 39 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Recommended Combustion Air Inlet Moisture Trap The Maximum Vent Length for the vent and combustion air pipe (when used) is determined from the Maximum Equivalent Vent Length in To prevent moisture from trickling into the furnace vestibule, a trap can...
  • Page 40 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Combustion Air and Vent Piping Insulation The measured length of pipe used in a single or 2-pipe termination is included in the total vent length. Include deductions from the Maximum...
  • Page 41 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions TO CODE- - APPROVED DRAIN OR CONDENSATE PUMP Recommend “T” fitting with 4--inch minimum height standpipe (A) of same diameter or larger extending upward. Dry Well Dry Well (water tight...
  • Page 42: Meters

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Maximum Equivalent Vent Length - Meters Meters Unit Size 60,000 80,000 100,000 120,000 Pipe Dia. (mm) 0-610 15.2 30.4 53.3 60.9 28.9 39.6 53.3 60.9 13.7 24.3 53.3 60.9 22.8...
  • Page 43 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions The vent elbow can be rotated to the required location on the casing if necessary, see Fig. 49. To rotate the vent elbow: 1. Loosen the clamp on the inlet of the vent elbow attached to the inducer.
  • Page 44 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions HORIZONTAL LEFT-VERTICAL VENT CONFIGURATION Requires Internal Vent Kit A11327A See Product Data for Current Kit Number Alternate combustion air HORIZONTAL RIGHT-LEFT VENT CONFIGURATION connection. A11336 ALTERNATE COMBUSTION AIR CONNECTIONS...
  • Page 45 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Table 13 – Maximum Allowable Exposed Vent Lengths Insulation Table Maximum Allowable Exposed Vent Length in Unconditioned Space - Ft. 40,000* BTUH 60,000 BTUH Unit Size 3/8-in. 1/2-in. Uninsulated Uninsulated 3/8-in.
  • Page 46 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Installing the Vent Pipe Adapter and Combustion Air NOTICE Pipe Adapter CAUTION The following instructions are for PVC/ABS DWV vent piping only. DO NOT USE THESE TECHNIQUES FOR POLYPROPYLENE VENT PIPING SYSTEMS.
  • Page 47 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions termination elbows as shown in Fig. Fig. 41 Fig. WARNING For Ventilated Combustion Air Termination, See Fig. 19. Use appropriate methods to seal openings where combustion air CARBON MONOXIDE POISONING HAZARD pipe and vent pipe pass through roof or sidewall.
  • Page 48 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Two-Pipe (Direct Vent) and Single-Pipe (Ventilated 1. Cut two holes, one for each pipe, of appropriate size for pipe size being used. Combustion Air) Terminations 2. Loosely install elbow in bracket (if used) and place assembly on Single and two pipe vent terminals must be installed as shown in Fig.
  • Page 49 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Table 15 – Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials (U.S.A. Installations) MATERIALS 1. All pipe, fittings, primers*, and solvents* must conform to American National Standards Institute (ANSI) standards and American Society for Testing and Materials (ASTM) standards or ULC S636 where required by code.
  • Page 50: Start-Up, Adjustment, And Safety Check

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Example 2 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 (29 M) of combustion air inlet pipe, (3) 90º long-radius elbows, and a polypropylene concentric vent kit. Also includes 20 feet (6.1 M) of flexible polypropylene vent pipe, included within the 100 feet (30 M) of vent pipe.
  • Page 51 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions 3. Configure the set-up switches as necessary for the application. 4. Replace blower door. NOTE: If a bypass humidifier is used, setup switch SW1-3 (Min/Int Heat Rise Adjust) should be in ON position. This compensates for the increased temperature in return air resulting from bypass.
  • Page 52 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions A190040 Fig. 58 – Furnace Setup Switches and Description NOTE: If SW4-1 is turned ON position, the furnace control will NOT communicate with a communicating system wall control. Prime Condensate Trap with Water...
  • Page 53 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Adjustments CAUTION FURNACE DAMAGE HAZARD Failure to follow this caution could result in reduced furnace life. DO NOT push or force gas valve adjusting screw. This can result in...
  • Page 54 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions In the USA, the input rating for altitudes above 2000 ft. (609.6M) must Heating value = 1050 Btu/cu ft. be reduced by 2 percent for each 1000 ft. (304.8M) above sea level.
  • Page 55 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions NOTICE MODULATING ON/OFF Switch Min/Max Heat Adust DO NOT set Maximum Heat manifold pressure less than 3.2-in. w.c. or (Under Cap) more than 3.8 in. w.c. for natural gas. If required manifold pressure is outside this range, change main burner orifices to obtain manifold pressure in this range.
  • Page 56 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions 3. Jumper R to W/W1 and W2. Run furnace for 3 minutes in Table 17 – Gas Rate (CU ft./hr) maximum heat operation. SIZE OF TEST SIZE OF TEST DIAL 4.
  • Page 57 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions When setup switch SW1-4 is ON, operation will be near the high end of 4. Check the position of setup switch SW1-3. When set to ON, airflow the rise range for improved comfort.
  • Page 58 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Adjust Cooling Airflow – High-Speed and Adjust Thermostat Heat Anticipator. Low-Speed Cooling 1. Mechanical thermostat. Set thermostat heat anticipator to match the amp. draw of the electrical components in the R-W/W1 circuit.
  • Page 59: Rate

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Table 19 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate To Be Used with Modulating Furnaces EXCEPT (F/G)97CMN0602120 MODULATING FURNACE (TABULATED DATA BASED ON 20,000 BTUH MAX-HEAT / 8,000 BTUH MIN-HEAT PER BURNER,...
  • Page 60 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Table 18- Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Continued) To Be Used with Modulating Furnaces EXCEPT (F/G)97CMN0602120 MODULATING FURNACE (TABULATED DATA BASED ON 20,000 BTUH MAX-HEAT / 8,000 BTUH MIN-HEAT PER BURNER,...
  • Page 61: Rate

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Table 20 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate To Be Used with Modulating Furnaces (F/G)97CMN0602120 Only (TABULATED DATA BASED ON 20,200 BTUH MAX-HEAT / 8,000 BTUH MIN-HEAT PER BURNER,...
  • Page 62 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Continued) To Be Used with Modulating Furnaces (F/G)97CMN0602120 Only (TABULATED DATA BASED ON 20,200 BTUH MAX-HEAT / 8,000 BTUH MIN-HEAT PER BURNER,...
  • Page 63: Service And Maintenance

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions A200363 Fig. 65 – Service Label Information SERVICE AND MAINTENANCE CAUTION PROCEDURES Untrained personnel can perform basic maintenance functions such as ENVIRONMENTAL HAZARD cleaning and replacing air filters. All other operations must be performed Failure to follow this caution may result in environmental pollution.
  • Page 64 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions troubleshooting. Status codes can be viewed at the indicator in blower WARNING door. The amber furnace control LED is either .heartbeat, off or a code composed of 1 or 2 digits. The first digit is the number of short flashes, ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD the second digit is the number of long flashes.
  • Page 65 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions After the component test is completed, 1 or more status codes (heartbeat, WARNING 2+5, 3+5, 4+1, 4+2) will flash. See Service Label on control door or Service/Status Code Instructions for explanation of status codes.
  • Page 66 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions 8. Turn on electrical supply to furnace. 12. Spin the blower wheel by hand to verify that the wheel does not rub on the housing. Blower Motor and Wheel Maintenance 13.
  • Page 67 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions IGNITER GROMMET BURNER SUPT. ASSY MOTOR SHAFT FLAT BRACKET, IGNITER MOTOR ARM SCREW SET SCREW MOTOR WHEEL HUB BURNER ASSY SEE DETAIL SCREW LOCATION BLOWER HSG ASSY BRACKET FLAME ROLLOUT...
  • Page 68 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions 11. Connect the wire for the flame sensor. 4. Check igniter resistance. Igniter resistance is affected by temperature. Only check resistance when the igniter is at room 12. Connect the wire for the Hot Surface Igniter.
  • Page 69 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Cleaning Condensate Drain and Trap Cleaning Heat Exchangers NOTE: If the condensate trap is removed, a new gasket between the trap The following items must be performed by a qualified service and collector box is required.
  • Page 70: Winterization

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions 12. Check for gas leaks. Since the furnace uses a condensing heat exchanger, some water will accumulate in the unit as a result of the heat transfer process. Therefore, 13.
  • Page 71 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions A200359 Fig. 71 – Troubleshooting Guide Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 72 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions A200360 Troubleshooting Guide (continued) Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 73 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions A200361 Troubleshooting Guide (continued) Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 74: Sequence Of Operation

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions SEQUENCE OF OPERATION intermediate-heat. The furnace control CPU defaults to minimum-heat on the first thermostat cycle and calculates the modulating rate that the CAUTION furnace should run at for 19 minutes on subsequent heat cycles.
  • Page 75 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions control CPU will lock out of Gas-Heating mode and operate the on selection at blower-OFF delay switches). The furnace control inducer motor IDM at full speed until flame is no longer proved.
  • Page 76 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions Two-Stage Thermostat and Two-Stage Intermediate/ The dehumidification output, D or DHUMon the Thermostat should be connected to the furnace control thermostat terminal DHUM. When Maximum Heating there is a dehumidify demand, the DHUM input is activated, which Fig.
  • Page 77 F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions The blower motor BLWM will remain on until the main burners ignite disappear at the same time, the blower motor BLWM will remain on at then shut OFF and remain OFF for 25 seconds before coming back on at minimum-heat airflow for the selected blower-OFF delay period.
  • Page 78: Parts Replacement Information Guide

    F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions PARTS REPLACEMENT INFORMATION GUIDE Casing Group Gas Control Group Blower door Burner Bottom plate Flame sensor Control door Gas valve Door knob assembly Hot surface igniter Top filler plate...

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