Bryant N80ESU Installation Instructions Manual
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Bryant N80ESU Installation Instructions Manual

Bryant N80ESU Installation Instructions Manual

Single stage, ecm motor, ultra low nox, 80% afue gas furnace
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INSTALLATION INSTRUCTIONS
Single Stage, ECM Motor, Ultra Low NOx,
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80% AFUE Gas Furnace
N80ESU, R80ESU
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Approved for installations up to 5,400 feet (1646 meters)
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NOTE: Read the entire instruction manual before starting the
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installation.
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Portions of the text and tables are reprinted from current edition
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of NFPA 54/ANSI Z223.1E, with permission of National Fire
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Protection Association, Quincy, MA 02269 and American Gas
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Association, Washington DC 20001. This reprinted material is
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not the complete and official position of the NFPA or ANSI on
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the referenced subject, which is represented only by the standard
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  • Page 1: Table Of Contents

    INSTALLATION INSTRUCTIONS Single Stage, ECM Motor, Ultra Low NOx, 80% AFUE Gas Furnace N80ESU, R80ESU SAFETY CONSIDERATIONS ......

  • Page 2: Safety Considerations

    SAFETY CONSIDERATIONS 2. Install this furnace only in a location and position as specified in the “Location” section of these instructions. WARNING 3. Provide adequate combustion and ventilation air to the furnace space as specified in “Air for Combustion and Ventilation”...
  • Page 3 A190257 Fig. 1 - - Dimensional Drawing Table 1 – Dimensions VENT VENT CABINET TOP FLUE CONNECTION WIDTH OUTLET WIDTH COLLAR ONLY BOTTOM WIDTH SIZE* SHIP WT FURNACE SIZE IN. (MM) IN. (MM) IN. (MM) IN. (MM) IN. (MM) (LB / KG) 17- -1/2 (445) 15- -7/8 (403) 11- -9/16 (294)

  • Page 4: Codes And Standards

    Duct Systems Air Conditioning Contractors Association (ACCA) Manual D, Sheet Metal and Air Conditioning Contract- ors National Association (SMACNA), or American Society of Heating, Refrigeration, and Air Condition- ing Engineers (ASHRAE) 2005 Fundamentals Hand- book Chapter 35 or 2004 HVAC Systems and Equip- ment Handbook Chapters 9 and 16.

  • Page 5: Location

    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 AIR CONDITIONED AIR IS DISCHARGED TO THE LEFT. THE BLOWER IS THE BLOWER IS LOCATED TO THE LEFT LOCATED ABOVE THE BURNER SECTION, AND...
  • Page 6 WARNING FIRE HAZARD Failure to follow this warning could result in personal injury, death, and/or property damage. When the furnace is installed in a residential garage, the burners and ignition sources must be located at least 18 inches above the floor. (See Fig. 5) The furnace must be located or protected to avoid damage by vehicles.

  • Page 7: Air For Combustion And Ventilation

    b. Size openings and ducts per Fig. 7 and Table 2. CAUTION 1 SQ IN. PER 4000 DUCTS BTUH* FURNACE CORROSION HAZARD O UTDOORS Failure to follow this caution may result in furnace damage. Air for combustion must not be contaminated by halogen 12 ″...

  • Page 8: Installation

    = combined input of all fan- -assisted appliances in Btuh/hr CIRCULATING AIR ACH = air changes per hour (ACH shall not exceed 0.60.) VENT THROUGH ROOF DUCTS The following requirements apply to the Standard Method and to the Known Air Infiltration Rate Method. 1.

  • Page 9: Downflow Installation

    1. Tilt or raise furnace and remove two screws holding bot- 2. For each leg, install nut on bolt and then install bolt and tom filler panel. (See Fig. 9) nut in hole. (Install flat washer if desired.) 3. Install another nut on other side of furnace base. (Install flat washer if desired.) 4.

  • Page 10: Horizontal Installation

    FURNACE FURNACE (OR COIL CASING APPROVED COIL ASSEMBLY WHEN USED) COIL BOX COMBUSTIBLE FLOORING COMBUSTIBLE FLOORING SHEET METAL PLENUM DOWNFLOW FLOOR SUBBASE OPENING SHEET METAL PLENUM FLOOR OPENING A08556 Fig. 13 - - Furnace, Plenum, and Coil Assembly or Coil Box Installed on a Combustible Floor A96285 Fig.

  • Page 11: Filter Arrangement

    The bottom closure panel on furnaces of widths 17- -1/2 in. (445 Maintain a 1- -in. (25 mm) clearance from combustible materials mm) and larger may be used for flame roll- -out protection when to supply air ductwork for a distance of 36 in. (914 mm) bottom of furnace is used for return air connection.
  • Page 12 " (6mm) THREADED ROD 4 REQ. OUTER DOOR A S SEMBLY SECURE ANGLE IRON TO BOTTOM OF FURNACE WITH 3 #8 x " (19mm) SCREWS TYPICAL FOR 2 SUPPORTS 8" (203mm) MIN FOR DOOR REMOVAL 1” (25mm) SQUARE, 1-1/4”x1-1/4”x1/8” (32x32x3mm) ANGLE IRON OR UNI-STRUT MAY BE USED (2) HEX NUTS, (2) WASHERS &...

  • Page 13: Gas Piping

    A180240 Fig. 17 - - Typical Attic Installation Return Air Connections WARNING WARNING FIRE OR EXPLOSION HAZARD FIRE HAZARD Failure to follow this warning could result in personal injury,death, and/or property damage. Failure to follow this warning could cause personal injury, death and/or property damage.

  • Page 14: Air Delivery - - Cfm

    1. Gas supply connections MUST be performed by a furnace. A 1/8- -in. (3 mm) NPT plugged tapping, accessible for licensed plumber or gas fitter. test gauge connection, MUST be installed immediately upstream of gas supply connection to furnace and downstream of manual 2.
  • Page 15 shutoff valve before and during supply pipe pressure test. After all connections have been made, purge lines and check for leakage at furnace prior to operating furnace. The gas supply pressure shall be within the maximum and minimum inlet supply pressures marked on the rating plate with the furnace burners ON and OFF.

  • Page 16: Electrical Connections

    ELECTRICAL CONNECTIONS Make all electrical connections in accordance with current edition of National Electrical Code (NEC) NFPA 70 and any local codes WARNING or ordinances that might apply. WARNING ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD Failure to follow safety warnings could result in dangerous FIRE HAZARD operation, serious injury, death or property damage.

  • Page 17: 24- -V Wiring

    24- -V WIRING 12. Complete electrical box wiring and installation. Connect line voltage leads as shown in Fig. 24. Use best practices Make field 24- -v connections at the 24- -v terminal strip. (See Fig. 24) (NEC in U.S. for wire bushings, strain relief, etc.) Connect terminal Y as shown in Fig.
  • Page 18 SW1 – SEE SW1 - FAULT INDUCER MOTOR DIAGNOSTIC RECALL/CLEAR LOW VOLTAGE LABEL FOR USE AND COMPONENT CONNECTOR OF THIS SWITCH TEST BUTTON INDUCER MOTOR AND COOL ON-DELAY AND HEAT OFF- IGNITER 115-VAC / NEUTRAL DELAY (JUMPER SHOWN IN CONNECTOR FACTORY DEFAULT POSITION) COOL HEAT...

  • Page 19: Venting

    VENTING operate with a non- -positive vent static pressure to minimize the potential for vent gas leakage. Category I furnaces operate with a The furnace shall be connected to a listed factory built chimney flue loss not less than 17 percent to minimize the potential for or vent, or a clay- -tile lined masonry or concrete chimney.

  • Page 20: Appliance Application Requirements

    used to reduce condensation. If a condensate drain is re- APPLIANCE APPLICATION REQUIREMENTS quired by local code, refer to the current edition of NFGC Appliance operation has a significant impact on the performance NFPA54/ANSI Z223.1, Section 12.10 for additional in- of the venting system.
  • Page 21 A180242 Fig. 25 - - Chimney Inspection Chart 441 01 1501 03 Specifications are subject to change without notice.

  • Page 22: Additional Venting Requirements

    ADDITIONAL VENTING REQUIREMENTS SIDEWALL VENTING A 4” (101 mm) round vent elbow is supplied with the furnace. A This furnace is not approved for direct sidewall horizontal 5- -inch (127 mm) or 6- - inch (152 mm) vent connector may be venting.

  • Page 23: Start- -Up, Adjustment, And Safety Check

    SEE NOTES: 1,2,4,7,8,9 on the page following these figures SEE NOTES: 1,2,4,5,7,8,9 on the page A03214 following these figures Fig. 29 - - Horizontal Right Application- -Vent Elbow Right A03215 Fig. 31 - - Horizontal Left Application- -Vent Elbow Up See NOTES following images.

  • Page 24: Start- -Up Procedures

    3. Gas supply pressure to the furnace must be greater than Table 10 – Altitude Derate Multiplier for U.S.A. 4.5- -In. W.C. (0.16 psig ) but not exceed 14- -In. W.C. (0.5 PERCENT DERATE psig). MULTIPLIER ALTITUDE (FT. / M) DERATE FACTOR* 4.

  • Page 25: Electrical Shock Hazard

    b. Loosen set screw on outlet tower pressure tap no more (2.) Return and supply ducts for excessive restrictions than one full turn with a 3/32 in. hex wrench. (See Fig. causing static pressures greater than the maximum heating static listed on the rating plate. c.

  • Page 26: Check Safety Controls

    THERMOSTAT SUBBASE WARNING TERMINALS WITH THERMOSTAT REMOVED (ANITICIPATOR, CLOCK, ETC., MUST BE OUT OF CIRCUIT.) FIRE HAZARD HOOK-AROUND Failure to follow this warning could result in personal AMMETER injury, death, and/or property damage. Gas valve outlet pressure tap must be tightened to prevent gas leak.
  • Page 27 Table 11 – Gas Rate (Cu Ft./Hr.) Table 12 – Gas Valve Outlet Pressure for Gas Heat Values at Altitude - - 40,000 SIZE OF TEST DIAL SIZE OF TEST DIAL SECONDS SECONDS FOR 1 FOR 1 Tabulated Data Based on 40,000 BTUH Input for 0---ft (0 M) 5 Cu REVOLU- REVOLU-...
  • Page 28 Table 13 – Gas Valve Outlet Pressure for Gas Heat Values at Table 14 – Gas Valve Outlet Pressure for Gas Heat Values at Altitude - - 60,000 Altitude - - 80,000 Tabulated Data Based on 80,000 BTUH Input, for 0---ft (0 M) Tabulated Data Based on 60,000 BTUH Input for 0---ft (0 M) to 5400---ft (1646 M) above sea level to 5400---ft (1646 M) above sea level...

  • Page 29: Service And Maintenance Procedures

    SERVICE AND MAINTENANCE Table 15 – Gas Valve Outlet Pressure for Gas Heat Values at Altitude - - 100,000 PROCEDURES Tabulated Data Based on 100,000 BTUH Input for 0---ft (0 M) Untrained personnel can perform basic maintenance functions to 5400---ft (1646 M) above sea level such as cleaning and replacing air filters.

  • Page 30: Care And Maintenance

    The electrical ground and polarity for 115- -v wiring must be See Fig. 35 for a summary of fault codes and a brief explanation properly maintained. Refer to Fig. 24 for field wiring information of fault codes. and to Fig. 38 for furnace wiring information. The stored status code will not be erased from the control NOTE: If the polarity is not correct, the STATUS LED on the memory, if 115- - or 24- -v power is interrupted.

  • Page 31: Cleaning And/Or Replacing Air Filter

    To ensure long life and high efficiency, clean accumulated dirt CAUTION and grease from blower wheel and motor annually. The inducer and blower motors are pre- -lubricated and require no additional lubrication. These motors can be identified by the CUT HAZARD absence of oil ports on each end of the motor.

  • Page 32: Flame Sensor Cleaning And Servicing

    14. Refer to furnace wiring diagram, and connect thermostat To reinstall ignitor and flame sensor: leads if previously disconnected. 1. Install the Hot Surface Ignitor (HSI) and bracket with gas- 15. To check blower for proper rotation: ket in burner assembly. a.
  • Page 33 Inducer assembly and elbow need not be removed from (9.) Reinstall the insulation assembly. collector box. NOTE: If insulation assembly is damaged, do not attempt to 6. Disconnect gas supply line from gas valve. repair, must be replaced with insulation kit. 7.

  • Page 34: Component Test

    (1.) The call for heat is satisfied (the connection between WARNING “R” & “W” is removed). (2.) Flame sense is lost (flame out), in which case the control will initiate an inter-purge (45s) and recycle. FIRE OR EXPLOSION HAZARD (3.) A lockout condition exists, in which case the control Failure to follow this warning could result in personal injury, terminates the heating call and waits for the error death and/or property damage.

  • Page 35: Wiring Diagrams

    Wiring Diagrams a. Inducer starts and runs throughout the entire test b. Hot surface ignitor on for 15 seconds, then off Refer to Fig. 38 for wiring diagram. c. Blower motor will be turned on at constant fan speed, heat Troubleshooting speed, and cool speed for 15 seconds each.

  • Page 36: Led Activity

    SERVICE GUIDE LED CODES STATUS CONTINUOUS OFF No 24 VAC Power to Control. FLASHING (RED, AMBER, GREEN) Power- -up verification of LED. CONTINUOUS ON (RED) Internal Control Fault Detected, control will try to Auto- -Reset, power cycle recommended. Replace control if power cycle doesn’t correct fault. CONTINUOUS ON (GREEN) Standby, Normal Operation, No Thermostat Requests.

  • Page 37: Parts Replacement Information Guide

    PARTS REPLACEMENT INFORMATION GUIDE CASING GROUP GAS CONTROL GROUP Outer door Burner assembly Blower door Orifice Top filler plate Flame sensor Bottom filler plate Hot surface ignitor Bottom enclosure Gas valve ELECTRICAL GROUP Manual reset limit switches Burner support assembly Control bracket HEAT EXCHANGER GROUP Junction box...
  • Page 38 Copyright 2019 International Comfort Products Lewisburg, TN 37091 USA Specifications are subject to change without notice. 441 01 1501 03...

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R80esu

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