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820TA/821TA
VARIABLE- -SPEED, ECM
INDUCED- -COMBUSTION, 2- -STAGE
4- -WAY MULTIPOISE, NON- -CONDENSING GAS FURNACE
Installation, Start- -up, Operating and
Service and Maintenance Instructions
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Series A
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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 NFPA 54/ANSI
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Z223.1E, with permission of National Fire Protection
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Washington DC 20001. This reprinted material is not the
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Table of Contents
Related Manuals for Bryant 821T
Summary of Contents for Bryant 821T
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Page 1: Table Of Contents
820TA/821TA VARIABLE- -SPEED, ECM INDUCED- -COMBUSTION, 2- -STAGE 4- -WAY MULTIPOISE, NON- -CONDENSING GAS FURNACE Installation, Start- -up, Operating and Service and Maintenance Instructions Series A SAFETY CONSIDERATIONS ......VENTING . - Page 2 A190045 ACCESSORY FILTER TOP AND VENT MEDIA CABINET OUTLET BOTTOM FLUE BOTTOM CONNECTION SHIP WT. CABINET COLLAR SIZE WIDTH WIDTH INLET WIDTH LB (KG) SIZE FURNACE SIZE 36045V14 14-3/16 (360) 12-9/16 (319) 9-5/16 (237) 12--- 11/16 (322) 4 (102) 111 (50) 16 (406) 36070V14 14-3/16 (360)
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Page 3: Safety Considerations
SAFETY CONSIDERATIONS to identify hazards which may result in minor personal injury or product and property damage. NOTE is used to highlight WARNING suggestions which will result in enhanced installation, reliability, or operation. 1. Use only with type of gas approved for this furnace. Refer FIRE, EXPLOSION, ELECTRICAL SHOCK, AND to the furnace rating plate. -
Page 4: Introduction
A10269 Fig. 2 - - Clearances to Combustibles INTRODUCTION This furnace is designed for minimum continuous return- -air temperature of 60_F (15_C) db or intermittent operation down to This 4- -way multipoise Category I fan- -assisted furnace is CSA 55_F (13_C)db such as when used with a night setback (formerly A.G.A. -
Page 5: Combustion And Ventilation Air
Batterymarch Park, Quincy, MA 02269; (www.NFPA.org) or for 1. Disconnect all power to the furnace. Multiple disconnects only the NFGC, contact the American Gas Association, 400 N. may be required. DO NOT TOUCH THE CONTROL OR Capitol Street, N.W., Washington, DC 20001 (www.AGA.org.) . ANY WIRE CONNECTED TO THE CONTROL PRIOR DISCHARGING YOUR... -
Page 6: Location
This furnace must: WARNING be installed so the electrical components are protected from water. FIRE, INJURY OR DEATH HAZARD not be installed directly on any combustible material other than wood flooring (refer to SAFETY Failure to follow this warning could result in personal CONSIDERATIONS). -
Page 7: Air For Combustion And Ventilation
CAUTION WARNING PERSONAL INJURY AND/OR PROPERTY CARBON MONOXIDE POISONING HAZARD DAMAGE HAZARD Failure to follow this warning could result in personal Improper use or installation of this furnace may result in injury or death. premature furnace component failure. This gas furnace may The operation of exhaust fans, kitchen ventilation fans, be used for heating buildings under construction provided clothes dryers, attic exhaust fans or fireplaces could create a... -
Page 8: The Standard Method
The opening shall commence within 12 in. (300 mm) of the WARNING ceiling. Appliances in the space shall have clearances of at least 1 in. (25 mm) from the sides and back and 6 in. (150 mm) from the front. The opening shall directly communicate with the outdoors CARBON MONOXIDE POISONING HAZARD or shall communicate through a vertical or horizontal duct to the Failure to follow this warning could result in personal... - Page 9 If: Iother = combined input of all other than fan- -assisted CIRCULATING AIR appliances in Btuh/hr VENT THROUGH ROOF DUCTS Ifan = combined input of all fan- -assisted appliances in Btuh/hr ACH = air changes per hour (ACH shall not exceed 0.60.) The following requirements apply to the Standard Method and to the Known Air Infiltration Rate Method.
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Page 10: Installation
INSTALLATION NOTE: Bottom closure must be used when leveling legs are used. It may be necessary to remove and reinstall bottom closure UPFLOW INSTALLATION panel to install leveling legs. To remove bottom closure panel, see Bottom Return Air Inlet Item 1 in Bottom Return Air Inlet section in Step 1 above. These furnaces are shipped with bottom closure panel installed in To install leveling legs: bottom return- -air opening. -
Page 11: Suspended Furnace Support
can be hung from floor joists, rafters or trusses or installed on a 2. Rotate bottom filler panel downward to release holding non- -combustible platform, blocks, bricks or pad. tabs. Suspended Furnace Support 3. Remove bottom closure panel. 4. Reinstall bottom filler panel and screws. The furnace may be supported under each end with threaded rod, angle iron or metal plumber’s strap as shown. -
Page 12: Filter Arrangement
Table 3 – Opening Dimensions - - In. (mm) FURNACE PLENUM OPENING FLOOR OPENING CASING APPLICATION WIDTH Upflow Applications on Combustible or Noncombustible 12- -11/16 21- -5/8 13- -5/16 22- -1/4 Flooring (subbase not required) (322) (549) (338) (565) Downflow Applications on Noncombustible Flooring 12- -9/16 13- -3/16 19- -5/8... -
Page 13: Downflow Furnaces
The supply- -air duct must be connected to ONLY the furnace supply- -air duct must be connected to ONLY the furnace supply supply- -outlet- -air duct flanges or air conditioning coil casing outlet or air conditioning coil casing (when used). When installed (when used). - Page 14 METHOD 2 USE (4) #8 x 3/4 (19 mm) SHEET METAL SCREWS FOR EACH STRAP. THE STRAPS SHOULD BE VERTICAL AGAINST THE FURNACE SIDES AND NOT PULL AWAY FROM THE FURNACE SIDES. METHOD 1 FOLD ALL STRAPS UNDER FURNACE AND SECURE WTH (4) #8 x 3/4 (19 mm) SHEET METAL SCREWS (2 SCREWS IN SIDE AND 2 SCREWS IN BOTTOM).
- Page 15 A190054 Fig. 18 - - Upflow Return Air Configurations and Restrictions DOWNFLOW RETURN AIR CONFIGURATIONS AND RESTRICTIONS A02163 Fig. 19 - - Downflow Return Air Configurations and Restrictions A02162 Fig. 20 - - Horizontal Return Air Configurations and Restrictions...
- Page 16 Table 4 – Air Delivery - - CFM (With Filter)* 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.) Unit Size: 36045V14 Clg/CF Switch settings External Static Pressure (ESP) Clg Switches: SW2-8...
- Page 17 Table 4 - - Air Delivery - - CFM (With Filter)* (CONTINUED) 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.) Unit Size: 48070V17 Clg/CF Switch settings External Static Pressure (ESP) Clg Switches:...
- Page 18 Table 4 - - Air Delivery - - CFM (With Filter)* (CONTINUED) 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.) Unit Size: 60090V21 Clg/CF Switch settings External Static Pressure (ESP) Clg Switches:...
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Page 19: Return Air Connections
Table 4 - - Air Delivery - - CFM (With Filter)* (CONTINUED) 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.) Unit Size: 66135V24 Clg/CF Switch settings External Static Pressure (ESP) Clg Switches:... - Page 20 CAUTION WARNING FIRE OR EXPLOSION HAZARD FURNACE DAMAGE HAZARD Failure to follow this warning could result in personal Failure to follow this caution may result in furnace damage. injury, death, and/or property damage. Connect gas pipe to furnace using a backup wrench to Use proper length of pipe to avoid stress on gas control avoid damaging gas controls and burner misalignment.
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Page 21: Electrical Connection
WARNING SUPPLY ELECTRICAL SHOCK AND FIRE HAZARD MANUAL SHUTOFF Failure to follow this warning could result in personal VALVE injury, death, or property damage. (REQUIRED) SEDIMENT The cabinet MUST have an uninterrupted or unbroken TRAP ground according to NEC NFPA 70 or local codes to UNION minimize personal injury if an electrical fault should occur. - Page 22 FIELD 24-VOLT WIRING FIELD 115-, 208/230-, 460-VOLT WIRING FACTORY 24-VOLT WIRING FACTORY 115-VOLT WIRING NOTE 2 1-STAGE THERMOSTAT FIVE FIELD-SUPPLIED TERMINALS WIRE FUSED DISCONNECT THREE-WIRE 208/230- OR HEATING- 460-VOLT ONLY THREE PHASE 208/230- W/W1 VOLT NOTE 1 SINGLE Y/Y2 115-VOLT FIELD- JUNCTION PHASE SUPPLIED...
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Page 23: Accessories
13. Reinstall cover to J- -Box. Do not pinch wires between 5. Connect line voltage leads as shown in Fig. 23. cover and bracket. 6. Reinstall cover to J- -Box. Do not pinch wires between cover and bracket. BX Cable Installation in Furnace J- -Box 1. -
Page 24: Venting
General Venting Requirements WARNING Follow all safety codes for proper vent sizing and installation requirements, including local building codes, the National Fuel CARBON MONOXIDE POISONING HAZARD Gas Code NFPA 54/ANSI Z223.1 (NFGC), Parts 12 and 13 in the United States, the local building codes, and furnace and vent Failure to follow the steps outlined below for each manufacturers’... - Page 25 See notes 1, 2, 4, 6, 7, 9, 10, 11, and 15 on the page following these figures A00275 A03180 Fig. 27 - - Two- -Stage Furnace with Single- -Speed Fig. 29 - - Two- -Stage Furnace with Single- -Speed Heat Pump Air Conditioner (Dual Fuel) See notes 2, 5, 8, 10, 11 and 12...
- Page 26 See notes 1, 2, 4, 11, 14, 15, and 16 on the page following these figures A03181 Fig. 31 - - Dual- -Fuel Thermostat with Two- -Stage Furnace See notes 2, 11, and 12 on the and Single- -Speed Heat Pump page following these figures A03183 Fig.
- Page 27 NOTES FOR FIGURES 27 - - 34 1. Heat pump MUST have a high pressure switch for 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 having date codes 1601E and later do not have or require a “ZONE”...
- Page 28 CHIMNEY INSPECTION CHART For additional requirements refer to the National Fuel Gas Code NFPA 54/ANSI Z223.1 and ANSI/NFPA 211 Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances Crown Rebuild condition: crown. Missing mortar or brick? Is chimney property lined with clay tile liner? Repair Reline...
- Page 29 Masonry Chimney Requirement Relining with a listed metal liner or Type- -B vent is considered to be a vent- -in- -a- -chase. NOTE: These furnaces are CSA design- -certified for use in If a metal liner or Type- -B vent is used to line a chimney, no other exterior tile- -lined masonry chimneys with a factory accessory appliance shall be vented into the annular space between the Chimney Adapter Kit.
- Page 30 Table 8 – Minimum Allowable Input Rating of Additional Venting Requirements Space- -Heating Appliance in Thousands of Btuh per Hour A 4- -in. (102 mm) round vent elbow is supplied with the furnace. A 5- -in. (127 mm) or 6- - in. (152 mm) vent connector may be INTERNAL AREA OF CHIMNEY required for some model furnaces.
- Page 31 SEE NOTES: 1,2,4,7,8,9 SEE NOTES:1,2,3,4,5,7,8,9 on the page following on the page following these figures these figures A03208 A03210 Fig. 36 - - Upflow Application - - Vent Elbow Up Fig. 38 - - Downflow Application - - Vent Elbow Up then Left SEE NOTES: 1,2,4,5,7,8,9 SEE NOTES: 1,2,3,4,7,8,9 on the page following...
- Page 32 SEE NOTES: 1,2,4,7,8,9 on the page following these figures A03213 Fig. 42 - - Horizontal Left Application - - Vent Elbow Left SEE NOTES: 1,2,4,5,6,7,8,9,10 on the page following these figures A03207 Fig. 40 - - Downflow Application - - Vent Elbow Left then Up SEE NOTES: 1,2,4,5,7,8,9 on the page following these figures A03214...
- Page 33 SEE NOTES: 1,2,4,5,7,8,9 on the page SEE NOTES: 1,2,4,5,7,8,9 on the page following these figures following these figures A03215 A03219 Fig. 45 - - Horizontal Left Application - - Vent Elbow Up Fig. 47 - - Horizontal Right Application - - Vent Elbow Left then Up SEE NOTES: 1,2,4,5,7,8,9 SEE NOTES: 1,2,4,5,7,8,9 on the page...
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Page 34: Start- -Up, Adjustment, And Safety Check
Caution!! For the following applications, use the minimum vertical heights as specified below. For all other applications, follow exclusively the National Fuel Gas Code. MIN. VENT MIN. VERTICAL VENT FURNACE VENT ORIENTATION FURNACE INPUT DIAMETER HEIGHT ORIENTATION (BTUH/HR) IN. (mm)* FT. -
Page 35: Start- -Up Procedures
Start- -Up Procedures WARNING FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in personal injury, death, and/or property damage. Never purge a gas line into a combustion chamber. Never test for gas leaks with an open flame. Use a commercially available soap solution made specifically for the detection of leaks to check all connections. - Page 36 A190048 Fig. 52 - - Furnace Setup Switch Description 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 A190049 Fig. 53 - - Airflow Selection (based on 350 CFM/TON) for A/C (SW2- -6, 7, 8) and *CF (SW2- -3, 4, 5)
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Page 37: Adjustments
A190047 Fig. 54 - - Service Label Adjustments b. Obtain average yearly gas specific gravity from local gas supplier. WARNING c. Find installation altitude in Table 11. d. Find closest natural gas heat value and specific gravity in Table 11. FIRE HAZARD e. - Page 38 c. Jumper R to W/W1. EXAMPLE 1: 0–2000 ft. (0- -610 M) altitude d. Run furnace for 3 minutes in low- -heat operation. For 22,000 Btuh per burner application use Table 11. e. Measure time (in sec) for gas meter to complete 1 Heating value = 1000 Btuh/cu ft.
- Page 39 c. This furnace is capable of automatically providing a. Remove blower access door if installed. proper airflow to maintain the temperature rise within b. Turn Dip switch SW- -7 or SW- -8 ON or OFF for de- the range specified on furnace rating plate. If temperat- sired blower off delay.
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Page 40: Wiring Diagram
A190269 Fig. 55 - - Wiring Diagram... - Page 41 Table 10 – Gas Rate (CU ft./hr) SECONDS G SIZE OF TEST DIAL SECONDS SIZE OF TEST DIAL FOR 1 REVOLUTION FOR 1 REVOLUTION 1 Cu Ft. 2 Cu Ft. 5 Cu Ft. 1 Cu Ft. 2 Cu Ft. 5 Cu Ft. 1800 1636 1500...
- Page 42 Table 11 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Tabulated Data Based on 22,000 Btuh High- -Heat/14,500 Btuh for Low- -Heat per Burner, Derated 4 Percent for Each 1000 Ft. (305 M) Above Sea Level) SPECIFIC GRAVITY OF NATURAL GAS AVG.
- Page 43 Table 11 - - Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Con’t.) (Tabulated Data Based on 22,000 Btuh High- -Heat/14,500 Btuh for Low- -Heat per Burner, Derated 4 Percent for Each 1000 Ft. Above Sea Level) SPECIFIC GRAVITY OF NATURAL GAS AVG.
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Page 44: Check Safety Controls
Check Safety Controls 2. Verify that switches SW1- -1 and SW1- -6 are OFF and oth- er setup switches are set as desired. Verify that switches The flame sensor, gas valve, and pressure switch were all checked SW1- -7 and SW1- -8 for the blower OFF DELAY are set as in the Start- -up procedure section as part of normal operation. -
Page 45: General
b. Remove outer access door. CAUTION c. Look into blower access door sight glass for current LED status. ELECTRICAL OPERATION HAZARD d. Remove blower access door. Failure to follow this caution may result in improper NOTE: The Status Codes cannot be retrieved by disconnecting furnace operation or failure of furnace. -
Page 46: Care And Maintenance
CARE AND MAINTENANCE have furnace and burner serviced by a qualified service agency. WARNING 5. Inspect the vent pipe/vent system before each heating sea- son for rust, corrosion, water leakage, sagging pipes or broken fittings. Have vent pipes/vent system serviced by a FIRE OR EXPLOSION HAZARD qualified service agency. - Page 47 Table 13 – Filter Size Information - - In. (mm) FILTER SIZE FURNACE CASING WIDTH SIDE BOTTOM FILTER TYPE RETURN RETURN 16 X 25 X 3/4 14 X 25 X 3/4 14 ---1/2 (368) Washable* (406 X 635 X 19) (356 X 635 X 19) 16 X 25 X 3/4 16 X 25 X 3/4...
- Page 48 9. Using field- -provided 25- -caliber rifle cleaning brush, 36- -in. (914 mm) long, 1/4- -in. (6 mm) diameter steel spring cable, a variable speed, follows: a. Remove metal screw fitting from wire brush to allow insertion into cable. b. Insert the twisted wire end of brush into end of spring cable, and crimp tight with crimping tool or crimp by striking with ball- -peen hammer.
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Page 49: Sequence Of Operation
13. Reconnect wires to the following components (Use con- a single- -stage thermostat because the furnace control CPU nection diagram on wiring label, if wires were not marked includes a programmed adaptive sequence of controlled for reconnection locations.): operation, which selects low- -heat or high- -heat operation. This selection is based upon the stored history of the length of a. - Page 50 repeat the ignition sequence for up to three more Tri- high- -heat pressure switch relay HPSR is de- -energized als- -For- -Ignition before going to Ignition- -Lockout. to close the NC contact. When sufficient pressure is Lockout will be reset automatically after three hours, available the high- -heat pressure switch HPS closes, or by momentarily interrupting 115 vac power to the and the high- -heat gas valve solenoid GV- -HI is ener-...
- Page 51 which is the true on- -board CF selection as shown in Fig. 53. b. High cooling- -When the R- -to- -G- -and Y/Y2 circuit is closed and there is a demand for dehumidification, the If the furnace control CPU switches from low- -cooling to furnace blower motor BLWM will drop the blower high- -cooling, the furnace control CPU will energize the air airflow to 90 percent of high- -cooling airflow.
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Page 52: Troubleshooting
6. Heat pump expired. See Fig. 29 - - 32 for thermostat connections. The component test sequence is as follows: When installed with a heat pump, the furnace control auto- a. The furnace control CPU turns the inducer motor ON matically changes the timing sequence to avoid long blow- at high- -heat speed and keeps it ON through step c. - Page 53 A14311A Fig. 59 - - Troubleshooting Guide...
- Page 54 A14311B Fig. 59 - - Troubleshooting Guide (Continued)
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Page 55: Parts Replacement Information Guide
TO OBTAIN INFORMATION ON PARTS: Consult your installing dealer or classified section of your local telephone directory under “Heating Equipment” or “Air Conditioning Contractors and Systems” headings for dealer listing by brand name or contact: BRYANT HEATING & COOLING SYSTEMS Consumer Relations Department P.O. - Page 56 Catalog No. II820TA ---02 E2019 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 Edition Date: 07/19 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
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