Table of Contents
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926TA
TWO- -STAGE VARIABLE- -SPEED ECM MULTIPOISE
CONDENSING GAS FURNACE
SERIES B ALL
SERIES C 60080, 60100, 66120
Installation, Start- -up, Operating and
Service and Maintenance Instructions
NOTE: Read the entire instruction manual before starting the installation.
SECTIONS
INTRODUCTION
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ACCESSORIES
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LOCATION
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INSTALLATION
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VENTING
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PARTS REPLACEMENT GUIDE
Use of the AHRI Certified
Mark indicates a
TM
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 current edition of
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.
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CERTIFIED
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Loose Parts Bag Contents
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Filter Size Information
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Opening Dimensions
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Air Delivery CFM
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Hangar Spacing
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Combustion- -Air Vent Pipe, Fitting & Cement Material..
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Maximum Allowable Exposed Vent Lengths Insulation
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Deductions from Maximum Equivalent Vent Length
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Altitude Derate Multiplier for U.S.A.
92
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TABLES
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Related Manuals for Bryant 66120
Summary of Contents for Bryant 66120
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Page 1: Table Of Contents
926TA TWO- -STAGE VARIABLE- -SPEED ECM MULTIPOISE CONDENSING GAS FURNACE SERIES B ALL SERIES C 60080, 60100, 66120 Installation, Start- -up, Operating and Service and Maintenance Instructions NOTE: Read the entire instruction manual before starting the installation. SECTIONS TABLES SAFETY CONSIDERATIONS . - Page 2 Required Notice for Massachusetts Installations IMPORTANT The Commonwealth of Massachusetts requires compliance with regulation 248 CMR as follows: 5.08: Modifications to NFPA- -54, Chapter 10 2) Revise 10.8.3 by adding the following additional requirements: a. For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied:...
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Page 3: Safety Considerations
SAFETY CONSIDERATIONS Installing and servicing heating equipment can be hazardous due to gas and electrical components. Only trained and qualified WARNING personnel should install, repair, or service heating equipment. Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters. All other operations must be FIRE, EXPLOSION, ELECTRICAL SHOCK, AND performed by trained service personnel. -
Page 4: Codes And Standards
8. A gas- -fired furnace for installation in a residential garage Air-Conditioning Engineers; or other approved engineering must be installed as specified in the warning box in the method to calculate heating load estimates and select the furnace. “Location” section. Excessive oversizing of the furnace may cause the furnace and/or vent to fail prematurely, customer discomfort and/or vent freezing. -
Page 5: Electrostatic Discharge (Esd) Precautions
ACCESSORIES S The use of copper tubing for gas piping is not approved by the state of Massachusetts. See Product Data Sheet for a list of accessories for this product. Electrical Connections LOCATION S US: Current edition of National Electrical Code (NEC) NFPA CAUTION S CANADA: Current edition of Canadian Electrical Code CSA PERSONAL INJURY AND/OR PROPERTY... -
Page 6: Minimum Clearances To Combustible Materials
distribution system. Refer to Air Ducts section. S Hydrochloric acid S Cements and glues S be provided ample space for servicing and cleaning. Always S Antistatic fabric softeners for clothes dryers comply with minimum fire protection clearances shown in S Masonry acid washing materials Table 2 or on the furnace clearance to combustible construction label. - Page 7 Vent 0 (0 mm) Top of Furnace 1 in. (25 mm) *Consult local building codes.
- Page 8 48080 151.5 (68.9) 60080 156.0 (70.9) 21 (533) 19--- 3/8 (492) 19--- 1/2 (495) 10--- 1/2 (267) 60100 166.0 (75.4) 66120 24--- 1/2 (622) 22--- 7/8 (581) 23 (584) 12--- 1/4 (311) 190.0 (85.5) Fig. 1 - - Dimensional Drawing...
- Page 9 THE BLOWER IS LOCATED BELOW THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED UPWARD. THE BLOWER IS LOCATED TO THE RIGHT OF THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED TO THE LEFT. THE BLOWER IS THE BLOWER IS LOCATED TO THE LEFT LOCATED ABOVE THE OF THE BURNER SECTION, BURNER SECTION, AND...
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Page 10: Air For Combustion And Ventilation
AIR FOR COMBUSTION AND WARNING VENTILATION Introduction CARBON MONOXIDE POISONING HAZARD Direct Vent (2- - pipe) Applications Failure to follow this warning could result in personal injury or death. When the furnace is installed as a direct vent (2-pipe) furnace, no special provisions for air for combustion are required. - Page 11 Indoor Combustion AirE NFPA & AGA of the floor. The minimum dimension of air openings shall be at least 3 in. (80 mm). See Fig. 7. Standard and Known- - Air- - Infiltration Rate Methods c. Combining space on different floor levels. The volumes of Indoor air is permitted for combustion, ventilation, and dilution, if spaces on different floor levels shall be considered as com- the Standard or Known- -Air- -Infiltration Method is used.
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Page 12: Minimum Free Area Required
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. IN./3,000 BTUH) FURNACE (1 SQ. IN./4,000 BTUH) (1,100 SQ. -
Page 13: Condensate Trap
CONDENSATE TRAP NOTICE Condensate Trap - - Upflow Orientation When the furnace is installed in the upflow position, it is not The field- -supplied, accessory horizontal drain trap grommet is necessary to relocate the condensate trap or associated tubing. ONLY REQUIRED FOR DIRECT VENT APPLICATIONS. Refer to Fig. - Page 14 Remove pressure switch tube from front pressure switch and discard. A new tube is shipped in the loose parts bag. Remove relief tube from relief Remove tube from relief port. port on condensate trap. Remove the screw that secures the trap to the collector box and remove trap.
- Page 15 Remove plug from If alternate vent position collector box. is required, loosen clamp DO NOT DISCARD. on inlet of vent elbow. Remove the screw that secures the trap to the collector box and remove trap. Unconverted Factory Configuration As Viewed in the Horizontal Right Orientation NOTE: Remove knockout in casing before re installing the condensate trap.
- Page 16 Remove the screw that secures the condensate trap to the collector box and remove trap. If alternate vent position is required, loosen clamp on vent elbow inlet. Remove relief tube from relief port on condensate trap. Remove front pressure switch tube and discard. A new tube is shipped in the Loose Parts bag.
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Page 17: Condensate Drain
CONDENSATE DRAIN CONNECTION c. All condensate piping is at least 3/4-in. PVC and there is a relief tee at the top of condensate drain piping as shown CAUTION in Fig. 14. NOTE: On narrower casings, it may be easier to remove the condensate trap, connect the drain line components and re-install FROZEN AND BURST WATER PIPE HAZARD the condensate trap. - Page 18 6. From the outside of the casing, insert the angled end of the 2. To allow for servicing the trap, the condensate drain elbow Z-pipe through drain hole in the left side of the casing and in the loose parts bag can be used to make a coupler to behind the inducer or gas valve.
- Page 19 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 20 Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Evaporator Coil + + + Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä 3/4” PVC Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä...
- Page 21 INSTALL CLAMPS ON DRAIN TUBE ATTACH ELBOW TO ATTACH DRAIN TUBE TO CONDENSATE FORMED END CONDENSATE TRAP DRAIN TRAP OF GROMMET CUT FORMED END OFF PULL DRAIN STUB CONDENSATE DRAIN THROUGH CASING ELBOW CONNECT SHORT END OF ’Z’ PIPE TO MODIFIED DRAIN ELBOW FACTORY SUPPLIED 1/2 IN.
- Page 22 Return Air Connections 3. Construct plenum to dimensions specified in Table 8 and Fig. 20. WARNING 4. Install special base coil assembly or coil box as shown in in Fig. 20. FIRE HAZARD CAUTION A failure to follow this warning could cause personal injury, death and/or property damage.
- Page 23 bottom return air is used. To remove bottom closure panel see Fig. CAUTION 22 and 23. Side Return Air Inlet MINOR PROPERTY HAZARD These furnaces are shipped with bottom closure panel installed in bottom return- -air opening. This panel MUST be in place when Failure to follow this caution may result in minor property side return air inlet(s) are used without a bottom return air inlet.
- Page 24 Provide duct transitions, as required, to smoothly transition airflow NOTICE from the return duct system to the filter (or IAQ device) to the furnace when the dimensions of the ductwork or furnace return air opening do not match the required filter or IAQ device dimensions. Design the duct system FIRST to determine how much See the instructions supplied with factory- -accessory duct adapters.
- Page 25 Table 6 – Filter Media Pressure Drop (Clean) Versus Face Velocity- - In. W.C. (Pa) Representative After-Market Filter Media* Factory-Accessory Face Velocity Washable Fiberglass* Pleated* (m/s) (1-in. / 2.5 cm) (1-in. / 2.5 cm) (2-in. / 5 cm) (1-in. / 2.5 cm) (2-in.
- Page 26 4-in. 21-in. Furnace Block Off 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 Side Return 4-Ton or Less A/C Capacity 21- or 24-1/2-in. 21-in.
- Page 27 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. 20 - - Installation on Combustible Flooring Table 8 –...
- Page 28 UPFLOW DOWNFLOW HORIZONTAL PERFORATED DISCHARGE DUCT 90° 90° FLANGE 120° 120° 120° A10493 Fig. 21 - - Duct Flanges BOTTOM CLOSURE SCREWS (2) Representative drawing only, SCREWS (4) some models may vary in appearance. Lay furnace on the back or side BOTTOM PLATE Remove the two (2) screws that secure the bottom...
- Page 29 5/ 16 (8mm) (8mm) 5/ 16 (44mm) (44mm) (8mm) (8mm) 5/ 16 (44mm) 3/ 4 3/ 4 (44mm) A89014 A11037 Fig. 24 - - Leveling Legs Fig. 27 - - Downflow Return Air Configurations and Restrictions LEVEL 0-IN.
- Page 30 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. The sheet metal MUST extend underneath the furnace casing by 1-in. (25 mm) with the door removed.
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Page 31: Air Ducts
AIR DUCTS NOTICE Many states, provinces and localities are considering or have implemented standards and/or restrictions on duct sizing practices, ductwork leakage, and/or ductwork thermal, airflow and electrical efficiencies. CONSULT LOCAL CODE OFFICIALS ductwork design performance requirements in your area. General Requirements The duct system should be designed and sized according to accepted national standards such as those published by: Air... - Page 32 Table 9 – Cooling and Heating Air Delivery - - CFM (Bottom Return with Filter) (SW1-5 and SW2---2 set to OFF, except as indicated. See notes 1 and 2) Cooling Switch Settings External Static Pressure (ESP) Unit Size SW2-8 SW2-7 SW2-6 1.030 30040...
- Page 33 Table 9 --- Cooling and Heating Air Delivery - - CFM (Bottom Return with Filter) (Con’t) Cooling Switch Settings External Static Pressure (ESP) Unit Size SW2-8 SW2-7 SW2-6 42060 Clg Default: 1330 1295 1260 1220 1190 1150 1110 1075 1045 1005 See note 4 See note 4...
- Page 34 1590 1545 1490 Heating (SW1) Low Heat Airflow 1480 1435 1375 1330 1265 1215 1160 1115 1060 1005 66120 Clg Default: 2010 1960 1910 1850 1800 1750 1690 1645 1565 1480 1015 See note 4 1075 See note 4 1205...
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Page 35: Gas Piping
GAS PIPING WARNING WARNING FIRE OR EXPLOSION HAZARD A failure to follow this warning could result in personal FIRE OR EXPLOSION HAZARD injury, death, and/or property damage. Failure to follow this warning could result in personal If local codes allow the use of a flexible gas appliance injury, death, and/or property damage. -
Page 36: Electrical Connections
ELECTRICAL CONNECTIONS Table 10 – Maximum Capacity of Pipe NOMINAL LENGTH OF PIPE --- FT (M) IRON PIPE WARNING SIZE (3.0) (6.0) (9.1) (12.1) (15.2) IN. (MM) 1/2 (13) ELECTRICAL SHOCK, FIRE OR EXPLOSION 3/4 (19) HAZARD 1 ( 25) Failure to follow safety warnings could result in 1-1/4 (32) 1400... - Page 37 115- -V Wiring External Electrical Box on Furnace Casing Furnace must have a 115-v power supply properly connected and NOTE: Check to ensure that external electrical box does not grounded. interfere with duct work, gas piping or the indoor coil drain. See Fig.
- Page 38 Power Cord Installation in Furnace J- - Box thermostat can also be used to control the staging. For two stage thermostat control of the furnace staging, turn SW1-2 ON at the NOTE: Power cords must be able to handle the electrical furnace control board.
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Page 39: Electrical Data
20/15 60100 115--- 60--- 1 14.7/11.3 19.4/15.0 12/14 29/24 (8.8/7.3) 20/15 66120 115--- 60--- 1 14.7/11.3 19.4/15.0 12/14 29/24 (8.8/7.3) 20/15 * Permissible limits of the voltage range at which the unit operates satisfactorily. # Unit ampacity = 125 percent of largest operating component’s full load amps plus 100 percent of all other potential operating components’ (EAC, humidifier, etc.) full load amps. - Page 40 To HUM Terminal On To Humidifier Leads Furnace Control Board 24 V Coil To Humidifier Leads To Com/24V Screw Terminal on Thermostat Strip A11157 Fig. 36 - - Field- -supplied Isolation Relay for Humidifiers with Internal Power Supply W/W1 Y/Y2 A11401 Fig.
- Page 41 MODEL PLUG AIR CONDITIONING (A/C) & SW1 SETUP OUTDOOR HUMIDIFIER CONNECTOR CONTINUOUS FAN (CF) SWITCHES AND AIR TEMP TERMINAL (24-VAC AIRFLOW SETUP SWITCHES BLOWER OFF- CONNECTOR 0.5 AMP MAX). ACRDJ – AIR DELAY CONDITIONING RELAY DISABLE JUMPER TWINNING CONNECTOR 24-V THERMOSTAT TERMINALS FLASH UPGRADE...
- Page 42 THERMOSTAT THERMOSTAT See notes 2, 5, 7, 10, 11, 16, and 17 See notes 1, 2, 4, 6, 7, 9, 10, 11, 15, 16, and 17 Modulating and 2-Stage Furnace with Single-Speed Heat Pump Modulating and 2-Stage Furnace with Single-Speed Air Conditioner THERMOSTAT THERMOSTAT See notes 1, 2, 3, 4, 6, 8, 9, 10, 12, 13, 15, 16, and 17...
- Page 43 NOTES FOR THERMOSTAT WIRING DIAGRAMS 1. Heat pump MUST have a high pressure switch for HYBRID HEATr dual fuel applications. 2. Refer to outdoor equipment Installation Instructions for additional information and setup procedure. 3. If the heat pump date code is 1501E or earlier, select the “ZONE” position on the two speed heat pump control. Heat pumps with date code 1601E and later do not have or require a “ZONE”...
- Page 44 Other gas appliances with their own venting system may also use WARNING the abandoned chimney as a raceway providing it is permitted by local code, the current edition of the National Fuel Gas Code, and the vent or liner manufacturer’s installation instructions. Care must CARBON MONOXIDE POISONING HAZARD be taken to prevent the exhaust gases from one appliance from Failure to follow the steps outlined below for each appliance...
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Page 45: Vent Termination Kit For Direct Vent (2- -Pipe) Systems
Table 12 – Vent Termination Kit for Direct Vent (2- -pipe) Systems Approved Two- Pipe Termination Fittings Vent and Allowable 1 1/2--in. 2--in. 2 1/2--in. 3--in. 4--in. Combustion Air Concentric Vent (38 mm) (51 mm) (64 mm) (76--mm) (102 mm) Pipe Diameters 1 1/2--in. - Page 46 Ventilated Combustion Air prevailing winds. The roof location is preferred since the vent and combustion air system is less susceptible to damage or The vent pipe for a Ventilated Combustion Air System must contamination. The termination is usually located away from terminate outdoors.
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Page 47: Maximum Equivalent Vent Length
The Maximum Vent Length for the vent and combustion air pipe The measured length of pipe used in a single or 2- -pipe termination (when used) is determined from the Maximum Equivalent Vent is included in the total vent length. Include deductions from the Length in Table 16 minus the number of fittings multiplied by the Maximum Equivalent Vent Length (MEVL) contained in the deduction for each type of fitting used from Table 17. - Page 48 Combustion Air and Vent Piping Insulation 3. Tighten the clamp around the vent elbow. Torque the clamp to 15 lb- -in. See Fig. 45- -48. Guidelines Installing the Vent Pipe Adapter and Combustion Air NOTE: Use closed cell, neoprene insulation or equivalent. Pipe Adapter The vent pipe may pass through unconditioned areas.
- Page 49 Table 13 – Hanger Spacing Material Diameter PVC Sch 40 SDR 21 & 26 CPVC Polypropylene 1 1/2--in. 3--ft. 2 1/2--ft. 3--ft. 3--ft. 3.25--ft. 38--mm 914--mm 762--mm 914--mm 914--mm 1000 mm 2--in. 3--ft. 3--ft. 3--ft. 3--ft. 3.25--ft. 51--mm 914--mm 914--mm 914--mm 914--mm 1000 mm...
- Page 50 10. Loosen the clamps on the rubber vent coupling. NOTICE 11. Slide the end of the coupling with notches in it over the standoffs in the vent pipe adapter. RECOMMENDED SUPPORT FOR VENT 12. Tighten the clamp of the coupling over the vent pipe TERMINATIONS adapter.
- Page 51 4. Disassemble loose pipe fittings. Clean and cement using models is shipped in the loose parts bag. See Table 16 for usage, same procedures as used for system piping. DO NOT CE- part numbers and sourcing of 60K and 100K inducer outlet MENT POLYPROPYLENE FITTINGS.
- Page 52 Table 15 – Maximum Allowable Exposed Vent Lengths in Unconditioned Space Insulation Table - - Ft. / M Unit Size 40,000* BTUH 60,000 BTUH Uninsulated 3/8-in. Insulation 1/2-in. Insulation Uninsulated 3/8-in. Insulation 1/2-in. Insulation Pipe Dia. 1 ½ 2 ½ 1 ½...
- Page 53 NOTE: Maximum Equivalent Vent Length (MEVL) includes standard and concentric vent termination and does NOT include elbows. Use Table 17 - Deductions from Maximum Equivalent Vent Length to determine allowable vent length for each application. Table 16 – Maximum Equivalent Vent Length - - Ft. Unit Size 40,000 60,000...
- Page 54 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 17. Standard vent terminations or factory accessory concentric vent terminations count for zero deduction. See vent system manufacturer’s data for equivalent lengths of flexible vent pipe or other termination systems.
- Page 55 Attach gaskets to vent pipe and Vent Coupling and Adapter combustion air adapters. A13074 Fig. 40 - - Vent Coupling and Adapter with Gaskets TABS ON THE INDUCER OUTLET RESTRICTOR SNAP INTO THE SLOTS AT THE OUTLET OF THE INDUCER FOR USAGE: SEE MAXIMUM EQUIVALENT VENT LENGTH TABLE (10FT.
- Page 56 Slope vent pipe back to the furnace at least ¼” per foot Use 45 deg. Elbows where Avoid short horizontal offsets with 90 possible, to ensure conden- deg. Elbows. Short offsets can be sate drainage. difficult to slope and may trap con- densate.
- Page 57 Inside Corner Terminations Inside corner vent terminations are permitted provided that: S 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. S The clearance distances apply when the vent is at least 3 feet (1 meter) from, but not more than 6 feet (2 meters) away from an inside corner.
- Page 58 Rotate vent elbow to required position. Any other unused knockout may be used for combustion air connection. Rotate vent elbow to required position. & UPFLOW LEFT CONFIGURATION DOWNFLOW LEFT CONFIGURATION A11309A A11311A Rotate vent elbow to required position. Any other unused Any other unused knockout may be used knockout may be used...
- Page 59 ALTERNATE COMBUSTION AIR CONNECTIONS HORIZONTAL LEFT ---VERTICAL VENT CONFIGURATION HORIZONTAL RIGHT ---VERTICAL VENT CONFIGURATION A11327A A11337 Alternate combustion air connection. Rotate vent elbow to required position. Vent Pipe Requires Internal Vent Kit See Product Data for Current Kit Number HORIZONTAL RIGHT ---LEFT VENT CONFIGURATION HORIZONAL LEFT ---LEFT VENT CONFIGURATION A11328A A11336...
- Page 60 NOTES FOR VENTING OPTIONS 1. Attach vent pipe adapter with gasket to furnace casing. 2. Align notches in rubber coupling over standoffs on adapter. Slide clamps over the coupling. 3. Slide vent pipe through adapter and coupling into vent elbow. 4.
- Page 61 A12326 NOTE: The following is based upon National codes for gas appliances and is provided as a reference. Refer to local codes which may supersede these standards and/or recommendations. (1 ) (2 ) Canadian Installations U.S. Installations Item Clearance Description (per CAN/CSA B149.1) (per ANSI Z223.1/NFPA 54) Clearance above grade, veranda, porch, deck, balcony...
- Page 62 A12325 NOTE: The following is based upon National codes for gas appliances and is provided as a reference. Refer to local codes which may supersede these standards and/or recommendations. (1 ) (2 ) Canadian Installations U.S. Installations Item Clearance Description (per CAN/CSA B149.1) (per ANSI Z223.1/NFPA 54) Clearance above grade, veranda, porch, deck, balcony or...
- Page 63 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. 53 - - Combustion Air and Vent Pipe Termination for Direct Vent (2- -Pipe) System Roof Termination (Preferred) Vent Maintain 12 in...
- Page 64 OPTIONAL TERMINATION BRACKET FOR 2-PIPE TERMINATIONS OPTIONAL 12 IN. (305 MM) MIN. BRACKET SEPARATION BETWEEN COUPLING BOTTOM OFCOMBUSTION 12 IN. (305 MM) MIN. SEPARATION AIR AND BOTTOM OF VENT. BETWEEN BOTTOM OF COMBUSTION AIR AND BOTTOM OF VENT. MAINTAIN 12 IN. (305 MM) CLEARANCE ABOVE HIGHEST ANTICIPATED 12-IN.
- Page 65 Ventilated Combustion Air intake pipe Pipe hangar 3” (76 mm) 12” (305 mm) Ventilated Combustion Air intake termination in crawl space CRAWL SPACE highest level of insulation ATTIC A10497 Fig. 56 - - Vent Terminations for Ventilated Combustion Air...
- Page 66 EXAMPLE FOR UPFLOW INSTALLATIONS. MAY BE APPLIED TO OTHER CONFIGURATIONS. A12220 Fig. 57 - - Sample Inlet Air Pipe Connection for Polypropylene Venting Systems 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...
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Page 67: Start- -Up, Adjustment, And Safety Check
START- -UP, ADJUSTMENT, AND SAFETY setup switch configurations. To set these setup switches for the appropriate requirement: CHECK 1. Remove blower door. NOTICE 2. Locate setup switches on furnace control. 3. Configure the setup switches as necessary for the application. Important Installation and Start- -up Procedures 4. - Page 68 CAUTION CAUTION UNIT OPERATION HAZARD FURNACE DAMAGE HAZARD Failure to follow this caution may result in intermittent unit Failure to follow this caution may result in reduced furnace operation or performance satisfaction. life. Condensate trap must be PRIMED or proper draining may DO NOT redrill orifices.
- Page 69 point of intersection to find orifice size and low- -and high- - WARNING heat manifold pressure settings for proper operation. 5. Check and verify burner orifice size in furnace. NEVER ASSUME ORIFICE SIZE. ALWAYS CHECK AND FIRE HAZARD VERIFY. Failure to follow this warning could result in personal injury, death, and/or property damage.
- Page 70 Adjust Temperature Rise NOTICE NOTE: Blower door must be installed when taking temperature rise reading. Leaving blower door off will result in incorrect DO NOT set high- -heat manifold pressure less than 3.2- -in. temperature measurements, due to possible changes in duct static w.c.
- Page 71 To lock the furnace in high heat: and vice versa. The continuous fan speed can be further adjusted at a conventional thermostat using the continuous fan speed select 1. Connect a jumper across R and W/W1 and W2 at the function.
- Page 72 Checklist 1. Put away tools and instruments. Clean up debris. 2. Verify that switches SW1- -1 and SW1- -6 are OFF and other setup switches are set as desired. Verify that switches SW1- -7 and SW1- -8 for the blower OFF DELAY are set as desired per Table 19.
- Page 73 A14317 Fig. 63 - - Service Label Information...
- Page 74 1050 1050 1050 42060 1050 1225 1225 1225 48080 1050 1225 1400 1400 60080 1050 1225 1400 1750 1750 60100 1050 1225 1400 1750 1750 66120 1050 1225 1400 1750 1925 A14401 Fig. 64 - - Furnace Setup Switch Description...
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Page 75: Blower Off Delay Setup Switch
Table 18 – Altitude Derate Multiplier for USA Table 19 – Blower Off Delay Setup Switch PERCENT DERATE SETUP SWITCH ALTITUDE MULTIPLIER (SW1---7 AND ---8) DESIRED HEATING MODE DERATE FACTOR* POSITION BLOWER OFF DELAY (SEC.) 0–2000 0---610 1.00 SW1--- 7 SW1--- 8 2001–3000 610---914... -
Page 76: Orifice Size And Manifold Pressure
Table 21 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate TWO-STAGE FURNACE (TABULATED DATA BASED ON 20,000 BTUH HIGH-HEAT / 13,000 BTUH LOW-HEAT PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL) ALTITUDE RANGE HEAT VALUE 0.58 0.60 0.62... - Page 77 Table 21 - - Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Continued) TWO-STAGE FURNACE (TABULATED DATA BASED ON 20,000 BTUH HIGH-HEAT / 13,000 BTUH LOW-HEAT PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL) ALTITUDE RANGE HEAT VALUE 0.58 0.60...
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Page 78: Service And Maintenance Procedures
SERVICE AND MAINTENANCE Electrical Controls and Wiring PROCEDURES Each pressure switch is labeled with the reference location (noted as “COLLECTOR BOX- -LPS” or “HOUSING- -HPS” on the Untrained personnel can perform basic maintenance functions such switch). The nominal break point of each switch is shown on the as cleaning and replacing air filters. - Page 79 Care and Maintenance c. Remove blower door. NOTE: The Status Codes cannot be retrieved by disconnecting WARNING the limit switch. To retrieve Status Codes, follow the procedure below. 2. Turn Setup Switch, SW1- -1 “ON.” FIRE OR EXPLOSION HAZARD 3. Manually close blower door switch. Failure to follow this warning could result in personal injury, death and/or property damage.
- Page 80 4. Inspect burner compartment before each heating season for The inducer and blower motors are pre- -lubricated and require no rust, corrosion, soot or excessive dust. If necessary, have additional lubrication. These motors can be identified by the furnace and burner serviced by a qualified service agency. absence of oil ports on each end of the motor.
- Page 81 13. Reinstall blower assembly in furnace. Refer to Fig. 71. 14. Reinstall 2 screws securing blower assembly to blower 1. Disconnect power at external disconnect, fuse or circuit deck. breaker. 15. Reconnect blower leads to furnace control. Refer to furnace 2.
- Page 82 Flushing Collector Box and Drainage System 13. Install the gas pipe to the gas valve. WARNING WARNING FIRE OR EXPLOSION HAZARD ELECTRICAL SHOCK AND FIRE HAZARD Failure to follow this warning could result in personal injury Failure to follow this warning could result in personal injury, death, and/or property damage.
- Page 83 12. Shake trap dry. WARNING 13. Clean port on collector box with a small wire. To re-install Condensate Drain and Trap: ELECTRICAL SHOCK, FIRE OR EXPLOSION 1. Remove adhesive backing from condensate trap gasket HAZARD 2. Install gasket on collector box Failure to follow this warning could result in personal 3.
- Page 84 Secondary Heat Exchangers 13. When furnace is re- -started, flush condensate pump with clear water to check for proper operation before re- -starting The condensing side (inside) of the secondary heat exchanger furnace. CANNOT be serviced or inspected without complete removal of 14.
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Page 85: Sequence Of Operation
BURNER SUPT. ASSY IGNITER BRACKET, IGNITER BURNER ASSY FLAME ROLLOUT SWITCH FLAME SENSOR (BELOW BURNER) A11403 Fig. 71 - - Burner Assembly A11273 Fig. 68 - - Cleaning Heat Exchanger Cell SEQUENCE OF OPERATION NOTE: Furnace control must be grounded for proper operation or else control will lock out. - Page 86 a. Inducer Prepurge Period furnace control CPU will switch the inducer motor IDM speed from low to high. The high- -heat pressure switch (1.) If the furnace control CPU selects low- -heat opera- relay HPSR is de- -energized to close the NC contact. When tion the inducer motor IDM comes up to speed, the sufficient pressure is available the high- -heat pressure low- -heat pressure switch LPS closes, and the...
- Page 87 BLWM on cooling airflow. Cooling airflow is based on the thermostat closes R- -to- -G- -and- -Y1 circuits A/C selection shown in Fig. 64. The electronic air cleaner low- -cooling or closes the R- -to- -G- -and- -Y1- -and- -Y2 circuits for terminal EAC- -1 is energized with 115 vac when the high- -cooling.
- Page 88 motor BLWM will switch to operate at low- -cooling airflow. 6. Heat pump When the thermostat is satisfied, the blower motor BLWM See Fig. 38 and 39 for thermostat connections. will operate an additional 90 seconds at low- -cooling When installed with a heat pump, the furnace control auto- airflow before transitioning back to continuous- -blower matically changes the timing sequence to avoid long blower airflow.
- Page 89 A113325A Fig. 72 - - Troubleshooting Guide...
- Page 90 A113325B Troubleshooting Guide (Continued)
- Page 91 A150087 Fig. 73 - - Wiring Diagram...
- Page 92 -authorized replacement parts, kits, or accessories when modifying this product. Catalog No. II926TA ---10 E2018 Bryant Heating & Cooling Systems D 7310 W. Morris St. D Indianapolis, IN 46231 Edition Date 11/18 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.