Bryant 926SA Installation, Start-Up, Operating, Service And Maintenance Instructions

Bryant 926SA Installation, Start-Up, Operating, Service And Maintenance Instructions

Single-stage, non-communicating, variable-speed, ecm multipoise, condensing gas furnace

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926SA
Single-Stage, Non-Communicating, Variable-Speed,
ECM Multipoise, Condensing Gas Furnace
NOTE: Read the entire instruction manual before starting the
installation.

TABLE OF CONTENTS

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
AIR FOR COMBUSTION AND VENTILATION . . . . . . . . . . . . . . 8
CONDENSATE TRAP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 3 - Minimum Free Area Required for Each Combustion Air
Opening or Duct to Outdoors. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 4 - Minimum Space Volumes for 100% Combustion, Ventila-
tion and Dilution Air from Outdoors . . . . . . . . . . . . . . . . . . . . . . 10
CONDENSATE DRAIN CONNECTION . . . . . . . . . . . . . . . . . . . . 12
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 5 - Opening Dimensions - In. (mm) . . . . . . . . . . . . . . . . . 17
Table 6 - Air Filter Selection and Duct Sizing - In. (mm) . . . . . 18
Table 7 - Filter Media Pressure Drop (Clean) Versus Airflow - In.
W.C. (Pa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 8 - Filter Media Pressure Drop (Clean) Versus Face Velocity-
In. W.C. (Pa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4
Table 9 - Cooling
and Heating Air Delivery - CFM (Bottom Return
with Filter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
AIR DUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
GAS PIPING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 10 - Maximum Capacity of Pipe . . . . . . . . . . . . . . . . . . . . 28
ELECTRICAL CONNECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 11 - Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
VENTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 12 - Vent Termination Kit for Direct Vent (2-pipe) Systems38
Table 13 - Maximum Equivalent Vent Length - Ft. (M). . . . . . . 43
Table 14 - Deductions from Maximum Equivalent Vent Length - Ft.
(M) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 15 - Maximum Allowable Exposed Vent Lengths in Uncondi-
tioned Space Insulation Table - Ft. / M . . . . . . . . . . . . . . . . . . . . 46
Table 16 - Hanger Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 17 - Approved Combustion-Air and Vent Pipe, Fitting and Ce-
ment Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
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,
Service and Maintenance Instructions
on the referenced subject, which is represented only by the standard in its entirety.
Table 18 - Altitude Derate Multiplier for USA. . . . . . . . . . . . . . 57
Table 19 - Blower Off Delay Setup Switch . . . . . . . . . . . . . . . . 59
Table 20 - Orifice Size and Manifold Pressure (In. W.C.) for Gas Input
Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 21 - Gas Rate (CU ft./hr). . . . . . . . . . . . . . . . . . . . . . . . . . 61
PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
WINTERIZATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
PARTS REPLACEMENT INFORMATION GUIDE . . . . . . . . . . . 74
MODEL NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
TRAINING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
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 that
require 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,
5
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 visit the
following website. https://www.kidde.com.
!
A200352

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Summary of Contents for Bryant 926SA

  • Page 1: Table Of Contents

    926SA Single-Stage, Non-Communicating, Variable-Speed, ECM Multipoise, Condensing Gas Furnace Installation, Start-up, Operating, Service and Maintenance Instructions NOTE: Read the entire instruction manual before starting the START-UP, ADJUSTMENT, AND SAFETY CHECK ..54 installation.
  • Page 2: Required Notice For Massachusetts Installations

    926SA: Installation, Start-up, Operating, 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

    926SA: Installation, Start-up, Operating, Service and Maintenance Instructions NOTE: ALL DIMENSIONS IN INCH (MM) U.S. ECCN: Not Subject to Regulation (N.S.R.) SD5660-4 REV. - A210210 Fig. 1 – Dimensional Drawing SHIP WT. FURNACE SIZE LB (KG) CABINET WIDTH OUTLET WIDTH...
  • Page 4 926SA: Installation, Start-up, Operating, 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

    926SA: Installation, Start-up, Operating, 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. IMPORTANT INSTALLATION AND START-UP PROCEDURES For accessory installation details, refer to the applicable instruction Failure to follow this procedure may result in a nuisance smoke or odor literature.
  • Page 6: Codes And Standards

    926SA: Installation, Start-up, Operating, 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 FIRE, INJURY OR DEATH HAZARD...
  • Page 7: Accessories

    926SA: Installation, Start-up, Operating, Service and Maintenance Instructions ACCESSORIES CAUTION See Product Data Sheet for a list of accessories for this product. LOCATION PERSONAL INJURY AND/OR PROPERTY DAMAGE HAZARD General Improper use or installation of this furnace may result in premature These furnaces are shipped with materials to assist in proper furnace furnace component failure.
  • Page 8: Air For Combustion And Ventilation

    926SA: Installation, Start-up, Operating, Service and Maintenance Instructions AIR FOR COMBUSTION AND VENTILATION WARNING Introduction Direct Vent (2-pipe) Applications CARBON MONOXIDE POISONING HAZARD When the furnace is installed as a direct vent (2-pipe) furnace, no special Failure to follow this warning could result in personal injury or death.
  • Page 9: Condensate Trap

    926SA: Installation, Start-up, Operating, Service and Maintenance Instructions 2. The air infiltration rate is not known to be less than 0.40 air changes b. Doors and openable windows are weatherstripped and per hour (ACH). c. Other openings are caulked or sealed. These include joints...
  • Page 10 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 3 – Minimum Free Area Required for Each Combustion Air Opening or Duct to Outdoors TWO OPENINGS OR TWO HORIZONTAL DUCTS SINGLE DUCT OR OPENING VERTICAL DUCTS (1 SQ. IN./2,000 BTUH) (1 SQ.
  • Page 11 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Vent Pipe Clamp Condensate Trap Vent Elbow Clamp Relief Port Collector Box Plugs Vent Elbow Collector Box Plug Condensate Trap Remove plug from Relief Port If alternate vent position collector box. is required, loosen clamp DO NOT DISCARD.
  • Page 12: Condensate Drain Connection

    926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Evaporator Coil Remove the screw that secures the + + + condensate trap to the collector box If alternate vent position and remove trap. + = Positive pressure is required, loosen clamp <...
  • Page 13 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions trap with heat pad and replaces the factory-installed condensate trap. INSTALL CLAMPS ON DRAIN TUBE ATTACH DRAIN TUBE TO CONDENSATE Refer to the Accessory section of the Product Data for current kit...
  • Page 14 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions For Left Side Condensate Drain Connection: 8. From inside the casing, insert the short end of the formed grommet cut from the rubber drain elbow through the 7/8-in. drain knockout 1. For left side condensate drainage, the drain line is routed from the in the casing.
  • Page 15: Installation

    926SA: Installation, Start-up, Operating, Service and Maintenance Instructions 2. To allow for servicing the trap, the condensate drain elbow in the PERFORATED DISCHARGE DUCT loose parts bag can be used to make a coupler to allow for future FLANGE service of the condensate trap and drain line.
  • Page 16 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions BOTTOM CLOSURE SCREWS (2) Representative drawing. Models may vary. ANY COMBINATION OF 1, 2, OR 3 PERMITTED. Lay furnace on the back or side Remove the two (2) screws that secure the bottom A11036 Fig.
  • Page 17 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions DO NOT cut main furnace casing to attach supply side air duct, CAUTION humidifier, or other accessories. All supply-side accessories MUST be connected to duct external to furnace casing. MINOR PROPERTY HAZARD Return Air Connections Failure to follow this caution may result in minor property damage.
  • Page 18 926SA: Installation, Start-up, Operating, 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 FLOOR OPENING OPENING A10491 Fig.
  • Page 19 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions specification sheet for performance data for a particular filter media or operation of either unit unless the damper is in the full-heat or full-cool IAQ device. position. Platform Furnace Support Design the filter and associated ductwork for the best match of pressure drop versus filter size.
  • Page 20 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions 4-in. Block Off 21-in. Furnace 14-3/16 and 17-1/2-in. Plate Furnace 4-Ton or less, AC capacity airflow 1/2-in. Screws 20-in. Media Cabinet 16-in. Media Cabinet Media Cabinet Installation Media Cabinet Installation Option for...
  • Page 21: Pa)

    926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 7 – Filter Media Pressure Drop (Clean) Versus Airflow - In. W.C. (Pa) Representative After-Market Filter Media 14 x 25 Filter Factory-Accessory Factory-Accessory (356 x 635 mm) Washable Media Fiberglass Pleated (1-in.
  • Page 22 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions COMBUSTION - AIR PIPE (SEE VENTING SECTION) 30 IN. (762 mm) MIN. WORK AREA 2-IN. (51 mm) ROLLOUT PROTECTION REQUIRED Install 12” x 22” (305x559 mm) sheet metal in front of burner compartment area.
  • Page 23: With Filter)

    926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 9 – 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: 30040V14 Clg/CF Switch settings...
  • Page 24 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 9 – 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: 36060V14 Clg/CF Switch settings...
  • Page 25 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 9 – 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: 48080V17 Clg/CF Switch settings...
  • Page 26 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 9 – 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: 60100V21 Clg/CF Switch settings...
  • Page 27: Air Ducts

    926SA: Installation, Start-up, Operating, 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 28 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions PRESSURE TESTING ABOVE ½ psig: The furnace and it’s individual shut-off valve must be disconnected from 1 1/2 inch for Gas the gas supply piping system during any pressure testing of that system at test pressures in excess of ½...
  • Page 29: Electrical Connections

    926SA: Installation, Start-up, Operating, Service and Maintenance Instructions ELECTRICAL CONNECTIONS W.C.), turn off electric shutoff switch located on furnace gas control valve and accessible manual equipment shutoff valve before and during WARNING supply pipe pressure test. After all connections have been made, purge lines and check for leakage at furnace prior to operating furnace.
  • Page 30 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions J-Box Installation WARNING WARNING ELECTRICAL SHOCK AND FIRE HAZARD FIRE OR ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury, death, or property damage. Failure to follow this warning could result in personal injury, death, or The cabinet MUST have an uninterrupted or unbroken ground property damage.
  • Page 31 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions 10. Connect any code required external disconnect(s) to field power wiring. 11. Connect field power and neutral leads to furnace power leads inside the external electrical box as shown in Fig. For a top panel-mounted external electrical box,...
  • Page 32 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions The 24-v circuit contains an automotive-type, 3-amp. fuse located on the WARNING control. Any direct shorts during installation, service, or maintenance could cause this fuse to blow. If fuse replacement is required, use ONLY FIRE, EXPLOSION, ELECTRICAL SHOCK, AND a 3-amp.
  • Page 33 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Accessories (See Fig. 38 Fig. 39.) 1. Electronic Air Cleaner (EAC) Connect an accessory Electronic Air Cleaner (if used) using 1/4-in. female quick connect terminals to the two male 1/4-in. quick-connect terminals on the control board marked EAC-1 and EAC-2.
  • Page 34 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions THERMOSTAT THERMOSTAT See notes 2, 5, 7, 10, 14, and 15 See notes 2, 5, 8, 10, 14, and 15 Single-Stage Furnace with Single-Speed Air Conditioner Single-Stage Furnace with Two-Speed Air Conditioner...
  • Page 35: Venting

    926SA: Installation, Start-up, Operating, Service and Maintenance Instructions VENTING apprêt PVC/CPVC, Purple pour évacuation des gaz de combustion et système IPEX 636(1)t, ciment PVC pour évacuation des gaz de NOTE: Planning for the venting system should be done in conjunction combustion, coté...
  • Page 36 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions listed to ULC S636. M&G DuraVentR PolyProR or Centrotherm providing outside air for combustion for a single pipe vent system. Refer InnoFlueR polypropylene venting systems are ULC S636 listed. to the “Air For Combustion and Ventilation” Section.
  • Page 37 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Non-Direct Vent (1-pipe) System properties of combustion products from the vent system, as well as protection of adjacent structures. In a non direct-vent (1-pipe) system, all air for combustion is taken from...
  • Page 38 926SA: Installation, Start-up, Operating, 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. 41 – Combustion Air and Vent Pipe Termination for Direct Vent (2-Pipe) System...
  • Page 39 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions A12326 Fig. 43 – 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 40 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions A12325 Fig. 44 – 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 41 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions No operable windows, doors or Clearance distances for intakes of any type within the items greater than 3 feet shaded areas of Wall A and B. (1 meter ) away from the...
  • Page 42 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions The Provinces of Alberta and Saskatchewan require a minimum EXAMPLE FOR UPFLOW INSTALLATIONS. unobstructed distance of 4 ft. (1.2 M) from the foundation to the property MAY BE APPLIED TO OTHER CONFIGURATIONS.
  • Page 43 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Size the Vent and Combustion Air Pipes General NOTICE FURNACE OPTIONAL CONFIGURATION FOR COMBUSTION AIR INLET PIPE NOT IN In applications where there is a risk of excessive moisture entering the HORIZONTAL...
  • Page 44 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 14 – Deductions from Maximum Equivalent Vent Length - Ft. (M) Pipe Diameter (in): 1-1/2 2-1/2 Mitered 90º Elbow (2.4) (2.4) (2.4) (2.4) (2.4) Medium Radius 90º Elbow (1.5) (1.5) (1.5) (1.5)
  • Page 45 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions pipe above the drain. See Fig. 12. When using the External Vent Trap The measured length of pipe used in a single or 2-pipe termination is Kit, refer to those instructions for proper drain connections.
  • Page 46 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions 6. When using polypropylene venting systems with flexible vent 6. Install the insulation per the insulation manufacturer’s installation pipes, perform adjustments for the equivalent length of the flexible instructions. vent pipe to the calculated total equivalent venting system length.
  • Page 47 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Maximum Allowable Exposed Vent Lengths in Unconditioned Space Insulation Table - Ft. / M (Continued) 80,000 BTUH Unit Size Uninsulated 3/8-in. Insulation 1/2-in. Insulation Winter Pipe Dia. 1 ½ 2 ½ 1 ½...
  • Page 48 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Rotate vent elbow to required position. Any other unused knockout may be used for combustion air connection. Any other unused knockout may be used for combustion air Rotate vent elbow to connection.
  • Page 49 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Requires Accessory Vent Kit See Product Data for Current Kit Number A11329A HORIZONTAL LEFT-RIGHT VENT CONFIGURATION Requires Internal Vent Kit Fig. 55 – Horizontal Left (Appearance May Vary) See Product Data for Current Kit Number See “Notes for Venting Options”...
  • Page 50 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Attach gaskets to vent pipe and Vent Coupling and Adapter combustion air adapters. TABS ON THE INDUCER OUTLET RESTRICTOR SNAP A13074 INTO THE SLOTS AT THE OUTLET OF THE INDUCER Fig. 59 – Vent Coupling and Adapter with Gaskets...
  • Page 51 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions ft.(1-in (25 mm) per 4 ft.(1.2 M)) with no sags between hangers is CAUTION required. See Caution Box below. 19. Use appropriate methods to seal openings where combustion air FURNACE RELIABILITY HAZARD pipe and vent pipe pass through roof or sidewall.
  • Page 52 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Installing the Vent Termination 2. Loosely assemble concentric vent/combustion air termination components together using instructions in kit. Roof Terminations 3. Slide assembled kit with rain shield REMOVED through hole. A roof termination of any type will require a 4-in. (102 mm) flashing for NOTE: Do not allow insulation or other materials to accumulate inside a 2 in.
  • Page 53 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 17 – Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials 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 2.
  • Page 54: Start-Up, Adjustment, And Safety Check

    926SA: Installation, Start-up, Operating, 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 55 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions NOTE: If a bypass humidifier is used, setup switch SW1-4 two-speed cooling units. Refer to the Adjustments section for setup (Comfort/Efficiency) should be in OFF=Efficiency position. This switch configurations. To set desired cooling airflow: compensates for the increased temperature in return air resulting from 1.
  • Page 56 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions 1. Default A/C airflow when A/C setup switches are in OFF position. 2. Default Low-Stage A/C airflow when CF switches are in OFF position A200297 Fig. 62 – Airflow Selection (based on 350 CFM/TON) for A/C (SW2-6, 7, 8) and *CF (SW2-3, 4, 5) Prime Condensate Trap with Water 2.
  • Page 57 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions In Canada, the input rating must be reduced by 5 percent for altitudes of WARNING 2000 ft. (609.6M) to 4500 ft. (1371.6M) above sea level. The natural gas manifold pressures in Table 20...
  • Page 58 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions 7. Jumper the R to W thermostat connections at the furnace control BURNER FLAME board. BURNER 8. When main burners ignite, confirm inlet gas pressure is Between 4.5 in. w.c. and 13.6 in. w.c.
  • Page 59 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions For other CFM per ton Setup switch selections, see Fig. Fig. 61 CAUTION Fig. The Continuous Fan airflow selection via Setup switches SW2 is also the FURNACE DAMAGE HAZARD airflow for low-speed cooling when the furnace is used with a 2-speed cooling or heat pump unit.
  • Page 60 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Table 20 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate SINGLE-STAGE FURNACE (TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL) ALTITUDE...
  • Page 61: Service And Maintenance

    926SA: Installation, Start-up, Operating, Service and Maintenance Instructions SERVICE AND MAINTENANCE d. Set thermostat to “call for heat” and wait 1 minute. When pressure switch is functioning properly, hot surface igniter PROCEDURES should NOT glow and control diagnostic light flashes a status Untrained personnel can perform basic maintenance functions such as code 32.
  • Page 62 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions the switch is 0.10 inches of water above the maximum break point of the 6. Turn SW1-1 “OFF.” switch. 7. Amber will be ON continuous which indicates proper operation. Example: Nominal break point on pressure switch is 0.68-in. W.C. The 8.
  • Page 63 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Consult your local dealer about proper frequency of maintenance and the WARNING availability of a maintenance contract. WARNING CARBON MONOXIDE POISONING AND FIRE HAZARD ELECTRICAL SHOCK AND FIRE HAZARD Failure to follow this warning could result in personal injury, death Failure to follow this warning could result in personal injury, death, and/or property damage.
  • Page 64 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions blower wheel vanes. Do not bend wheel or blades as balance will be affected. 7. If greasy residue is present on blower wheel, remove wheel from the blower housing and wash it with an appropriate degreaser. To...
  • Page 65 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions a. Perform component self-test as shown at the bottom of the 13. Support the burner assembly and remove the screws that attach the SERVICE label, located on the blower door. burner assembly to the heat exchanger cell panel.
  • Page 66 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions Flushing Collector Box and Drainage System WARNING ELECTRICAL SHOCK AND FIRE HAZARD Failure to follow this warning could result in personal injury, death, and/or property damage. Turn off the gas and electrical supplies to the furnace and install lockout tag before performing any maintenance or service.
  • Page 67 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions 13. Clean port on collector box with a small wire. WARNING To re-install Condensate Drain and Trap: 1. Remove adhesive backing from condensate trap gasket ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD 2. Install gasket on collector box Failure to follow this warning could result in personal injury or death, 3.
  • Page 68: Winterization

    926SA: Installation, Start-up, Operating, Service and Maintenance Instructions 9. Remove the middle unused rubber plug from the port on the collector box opposite the condensate trap. See Fig. 10. Repeat Steps 5 through 8. 11. If a condensate pump is used, check with pump manufacturer to verify pump is safe for use with antifreeze used.
  • Page 69: Troubleshooting

    926SA: Installation, Start-up, Operating, Service and Maintenance Instructions TROUBLESHOOTING A200299 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 70 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions A200300 Fig. 74 – Troubleshooting Guide Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 71: Sequence Of Operation

    926SA: Installation, Start-up, Operating, Service and Maintenance Instructions SEQUENCE OF OPERATION cleaner terminal EAC-1 will remain energized for 90, 120, 150, or 180 sec (depending on the blower-OFF delay selection). The NOTE: Furnace control must be grounded for proper operation or furnace control CPU is factory-set for a 120-sec Blower-OFF control will lock out.
  • Page 72 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions c. Two-Stage Thermostat and Two-Speed Cooling blower-ON delay (25 seconds in heat), allowing the furnace heat Fig. 39 Fig. 40 for thermostat connections exchangers to heat up more quickly, then restarts at the end of the blower-ON delay period at heat airflow.
  • Page 73 926SA: Installation, Start-up, Operating, Service and Maintenance Instructions 346265-2 REV A A200284 Fig. 75 – Wiring Diagram Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 74: Parts Replacement Information Guide

    926SA: Installation, Start-up, Operating, 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 Manifold Orifice Electrical Group...

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