Bryant EVOLUTION 987MA Installation, Start-Up, Operating And Service And Maintenance Instructions Download

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987MA

MODULATING 4--WAY MULTIPOISE

CONDENSING GAS FURNACE

SERIES B

Installation, Start--up, Operating and

Service and Maintenance Instructions

NOTE

: Read the entire instruction manual before starting the

installation.
SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . . . . . . . .

INTRODUCTION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CODES AND STANDARDS

. . . . . . . . . . . . . . . . . . . . . . . . . . .

ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS

. . .

ACCESSORIES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LOCATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AIR FOR COMBUSTION AND VENTILATION

. . . . . . . . .

CONDENSATE TRAP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Upflow

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Downflow

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Horizontal

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CONDENSATE DRAIN

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Upflow

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Downflow

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Horizontal

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Filter Arrangement

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AIR DUCTS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ductwork Acoustical Treatment

. . . . . . . . . . . . . . . . . . . . .

GAS PIPING

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ELECTRICAL CONNECTIONS

. . . . . . . . . . . . . . . . . . . . . . .

115--V Wiring

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

J--Box Installation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

24--V Wiring

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Accessories

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Alternate Power Supplies

. . . . . . . . . . . . . . . . . . . . . . . . . .

VENTING

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Special Venting Requirements for Installations in Canada

Materials

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Venting Systems

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Locating Vent Termination

. . . . . . . . . . . . . . . . . . . . . . . . .

Size the Vent and Combustion Air Pipes

. . . . . . . . . . . . . . .

Combustion Air and Vent Piping Insulation Guidelines

. . .

Configure the Furnace

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing the Vent Termination

. . . . . . . . . . . . . . . . . . . . . .

Venting System Length Calculations

. . . . . . . . . . . . . . . . .

START--UP, ADJUSTMENT, AND SAFETY CHECK

. . . . . .

Select Setup Switch Positions

. . . . . . . . . . . . . . . . . . . . . . . .

Prime Condensate Trap

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Purge Gas Lines

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustments

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Check Safety Controls

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Checklist

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SERVICE AND MAINTENANCE PROCEDURES

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Cleaning Heat Exchangers

. . . . . . . . . . . . . . . . . . . . . . . . . . .

SEQUENCE OF OPERATION

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PARTS REPLACEMENT GUIDE

. . . . . . . . . . . . . . . . . . . . . .

TABLE

Loose Parts Bag Contents

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Minimum Clearances to Combustible Materials

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Minimum Free Area Required

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Minimum Space Volumes

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Filter Size Information

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Opening Dimensions

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Air Delivery CFM

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Maximum Capacity of Pipe

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Electrical Data

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Vent Termination Kit for Direct Vent (2--Pipe) Systems

. . . . . .

Combustion--Air Vent Pipe, Fitting & Cement Material..

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Maximum Allowable Exposed Vent Lengths Insulation

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Maximum Equivalent Vent Length

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Deductions from Maximum Equivalent Vent Length

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Altitude Derate Multiplier for U.S.A.

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Blower Off Delay Setup Switch

. . . . . . . . . . . . . . . . . . . . . . . .

Gas Rate

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Orifice Size and Manifold Pressure

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C E RT I F I E D

Use of the AHRI Certified

Mark indicates a

manufacturer’s participation in the program. For
verification of certification for individual products,
go to www.ahridirectory.org.

Portions of the text and tables are reprinted from NFPA 54/ANSI
Z223.1--2012

, 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.

Summary of Contents for EVOLUTION 987MA

Page 1: ...ines 64 Adjustments 64 Check Safety Controls 68 Checklist 68 SERVICE AND MAINTENANCE PROCEDURES 78 Cleaning Heat Exchangers 83 SEQUENCE OF OPERATION 90 PARTS REPLACEMENT GUIDE 95 TABLE Loose Parts Bag Contents 7 Minimum Clearances to Combustible Materials 7 Minimum Free Area Required 11 Minimum Space Volumes 11 Filter Size Information 23 Opening Dimensions 25 Air Delivery CFM 30 Maximum Capacity o...

Page 2: ...haust vent terminal for the horizontally vented gas fueled heating appliance or equipment The sign shall read in print size no less than one half 1 2 inch in size GAS VENT DIRECTLY BELOW KEEP CLEAR OF ALL OBSTRUCTIONS 4 INSPECTION The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation unless upon inspection the inspector observ...

Page 3: ...onal injury Sheet metal parts may have sharp edges or burrs Use care and wear appropriate protective clothing safety glasses and gloves when handling parts and servicing furnaces CAUTION This is the safety alert symbol When you see this symbol on the furnace and in instructions or manuals be alert to the potential for personal injury Understand the signal words DANGER WARNING and CAUTION These wor...

Page 4: ...nstruction literature NOTE Remove all shipping materials loose parts bag and literature before operating the furnace See Table 1 CODES AND STANDARDS Follow all national and local codes and standards in addition to these instructions The installation must comply with regulations of the serving gas supplier local building heating plumbing and other codes In absence of local codes the installation mu...

Page 5: ...l sources may also be used to prevent ESD damage ACCESSORIES See Product Data Sheet for a list of accessories for this product LOCATION PERSONAL INJURY AND OR PROPERTY DAMAGE HAZARD Improper use or installation of this furnace may result in premature furnace component failure This gas furnace may be used for heating buildings under construction provided that The furnace is permanently installed wi...

Page 6: ...ons S Chlorinated waxes and cleaners S Chlorine based swimming pool chemicals S Water softening chemicals S De icing salts or chemicals S Carbon tetrachloride S Halogen type refrigerants S Cleaning solvents such as perchloroethylene S Printing inks paint removers varnishes etc S Hydrochloric acid S Cements and glues S Antistatic fabric softeners for clothes dryers S Masonry acid washing materials ...

Page 7: ...ine Grommet 1 Junction Box Cover 1 Junction Box Base 1 Green Ground Screw 1 Blunt Tip Screws Junction Box 3 Thermostat Wire Grommet 1 Drain Extension Tube Z pipe Provided separately in furnace 1 Table 2 Minimum Clearances to Combustible Materials for All Units POSITION CLEARANCE Rear 0 0 mm Front Combustion air openings in furnace and in structure 1 in 25 mm Required for service 24 in 610 mm All S...

Page 8: ...CATION NOTE ALL DIMENSIONS IN INCH MM 22 2 7 8 7 8 22 2 POWER CONN AIR FLOW SEE NOTE 3 NOTES 1 Doors may vary by model 2 Minimum return air openings at furnace based on metal duct If flex duct is used see flex duct manufacturer s recommendations for equivalent diameters a For 800 CFM 16 in 406 mm round or 14 1 2 x 12 in 368 x 305 mm rectangle b For 1200 CFM 20 in 508 mm round or 14 1 2 x 19 1 2 in...

Page 9: ...NDITIONED AIR IS DISCHARGED DOWNWARD THE BLOWER IS LOCATED TO THE LEFT OF THE BURNER SECTION AND CONDITIONED AIR IS DISCHARGED TO THE RIGHT A12181 Fig 2 Multipoise Orientations 60 80 27 C 16 C SUPPLY AIR A10490 Fig 3 Freeze Protection and Return Air Temperature BACK POSITIONED DOWNWARD AIR RETURN CUT IN BACK BACK POSITIONED UPWARD A12182 Fig 4 Prohibited Installations 18 IN 457 2 mm MINIMUM TO BUR...

Page 10: ...xchangers and shorten furnace life Air contaminants are found in aerosol sprays detergents bleaches cleaning solvents salts air fresheners and other household products CAUTION CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in personal injury or death The operation of exhaust fans kitchen ventilation fans clothes dryers attic exhaust fans or fireplaces could create a N...

Page 11: ...gle Duct or Opening 80 000 30 000 110 000 divided by 2 000 55 0 Sq In for each two Horizontal Ducts Table 4 Minimum Space Volumes for 100 Combustion Ventilation and Dilution Air from Outdoors OTHER THAN FAN ASSISTED TOTAL 1 000 S BTUH GAS INPUT RATE FAN ASSISTED TOTAL 1 000 S BTUH GAS INPUT RATE ACH 30 40 50 40 60 80 100 120 140 Space Volume Ft3 M3 0 60 1 050 29 7 1 400 39 6 1 750 49 5 1 400 39 6 ...

Page 12: ... See the bottom images in Fig 9 and 10 A field supplied accessory Horizontal Installation kit trap grommet is required for all direct vent horizontal installations only The kit contains a rubber casing grommet designed to seal between the furnace casing and the condensate trap See Fig 17 The field supplied accessory horizontal drain trap grommet is ONLY REQUIRED FOR DIRECT VENT APPLICATIONS It it ...

Page 13: ...orts on collector box Connect relief tube to port on collector box Rotate elbow to desired position and tighten clamp to 15 lb in Slide tube in stand offs to adjust length Trim excess tube Connect pressure switch tube to port on collector box Attach condensate trap with screw to collector box Connect relief tube to relief port on condensate trap Align condensate trap over middle and bottom ports o...

Page 14: ...n open port on collector box Slide relief tube in stand offs to adjust length Vent elbow shown in alternate orientation Tighten clamp on inlet to vent elbow 15 lb in Align trap over middle and right hand port on collector box Horizontal Right Trap Configuration Unconverted Factory Trap Configuration As Viewed in the Horizontal Right Orientation A11278 Fig 9 Horizontal Right Trap Configuration Appe...

Page 15: ...lide relief tube in stand offs to adjust length Attach condensate trap to collector box with screw Align trap over middle and right hand port on collector box Install plugs in open ports on collector box Connect relief tube to port on collector box Trim excess tube Route pressure switch tube underneath relief tube and connect to port on collector box Connect relief tube to relief port on condensat...

Page 16: ... Condensate Drain 1 Remove the 7 8 in knock out from the right side of the casing See Fig 11 for suggested knockout removal tech nique 2 Remove the pre formed rubber drain elbow and two spring clamps from the loose parts bag 3 Slide a spring clamp 1 in 25 mm down the plain end the end without the formed grommet of the drain elbow 4 From inside the casing insert the formed grommet end of the elbow ...

Page 17: ...IRECT VENT APPLICATIONS It is NOT required for applications using single pipe or ventilated combustion air venting NOTICE TIP FROM CONTRACTORS When installing the furnace horizontally use the entire drain elbow that is do NOT cut as shown in Fig 14 to connect the trap to the drain line This helps to prevent bumps and shocks to the drain line from damaging the furnace drain trap Avoid misalignment ...

Page 18: ...g furnaces CAUTION L12F019B Fig 11 Knockout Removal A13364 Fig 12 Example of Field Drain Attachment INSTALL CLAMPS ON DRAIN TUBE ATTACH DRAIN TUBE TO CONDENSATE DRAIN TRAP PULL DRAIN STUB THROUGH CASING OPEN SPRING CLAMP INSERT FACTORYïSUPPLIED 1 2ïIN CPVC TO 3 4ïIN PVC ADAPTER OR 1 2ïIN CPVC PIPE CLAMP MAY BE LOCATED ON OUTSIDE OF DRAIN TUBE A11342A Fig 13 Formed Rubber Drain Grommet A11581 Fig 1...

Page 19: ... accessories MUST be connected to duct external to furnace main casing Return Air Connections FIRE HAZARD A failure to follow this warning could cause personal injury death and or property damage Never connect return air ducts to the back of the furnace Follow instructions below WARNING The return air duct must be connected to bottom sides left or right or a combination of bottom and side s of mai...

Page 20: ...m return air opening Remove and discard this panel when bottom return air is used in downflow applications To remove bottom closure panel perform the following 1 Tilt or raise furnace and remove 4 screws holding bottom plate See Fig 21 2 Remove bottom plate 3 Remove bottom closure panel 4 Reinstall bottom plate and screws Horizontal Installation NOTE The furnace must be pitched forward as shown in...

Page 21: ...bottom return applications for use in upflow downflow and horizontal applications A 16 inch 406 mm Media Cabinet is shipped with the 14 3 16 in 360 mm furnace and includes block off plates For upflow side return applications the Media Cabinet or field supplied accessory air cleaner can be installed on the side of the furnace or side and bottom when a bottom plenum is used See Fig 17 and 23 For dow...

Page 22: ... in 2 5 cm 2 in 5 cm 800 378 0 04 11 0 05 12 0 06 16 0 09 24 0 22 55 0 15 37 1000 472 0 05 13 0 07 18 0 08 21 0 13 32 0 29 72 0 20 49 1200 566 0 06 15 0 09 22 0 11 27 0 16 41 0 25 63 1400 661 0 07 17 0 12 31 0 13 33 0 20 51 0 31 79 1600 755 0 08 19 0 15 38 0 16 40 0 24 61 1800 850 0 08 21 0 18 47 0 18 47 0 29 73 2000 944 0 09 23 0 22 56 0 21 54 2200 1038 0 09 24 0 26 66 0 25 62 25 x 25 Filter 635 ...

Page 23: ...35 x 19 Washable 21 533 16 x 25 x 3 4 406 x 635 x 19 20 x 25 x 3 4 508 x 635 x 19 Washable 24 1 2 622 16 x 25 x 3 4 406 x 635 x 19 24 x 25 x 3 4 610 x 635 x 19 Washable Recommended to maintain air filter face velocity See Product Data for part number Air Filter Located in Filter Cabinet FILTER CABINET HEIGHT IN MM FILTER SIZE IN MM FILTER TYPE 16 406 1 16 x 25 x 3 4 406 x 635 x 19 or 1 16 x 25 x 4...

Page 24: ...ace Filler plates Screw 14 3 16 in Furnace with Filler Plates Centered 14 3 16 in Furnace Filler plate Screws 14 3 16 in Furnace with Filler Plates Off Set to Right Media Cabinet Installation Option for 4 Ton or Less A C Capacity 20 or 24 in Media Cabinet Installation with Angled Transition 20 or 24 in Media Cabinet Installation for Combination Side and Bottom Return Media Cabinet Installation Sid...

Page 25: ...d 15 1 2 394 19 483 16 1 2 419 20 508 21 533 Upflow Applications on Combustible or Noncombustible Floor ing KGASB subbase not required 19 1 2 495 21 5 8 549 20 1 8 511 22 1 4 565 Downflow Applications on Noncombustible Flooring KGASB subbase not required 19 3 8 492 19 483 20 508 19 5 8 498 Downflow applications on combustible flooring KGASB sub base required 18 5 8 473 19 483 20 1 4 514 20 5 8 600...

Page 26: ...ct Flanges 1 3 4 1 3 4 1 3 4 1 3 4 5 16 5 16 5 16 5 16 44mm 8mm 44mm 8mm 8mm 8mm 44mm 44mm A89014 Fig 20 Leveling Legs BOTTOMPLATE BOTTOM CLOSURE PANEL A11092 Fig 21 Removing Bottom Closure Panel LEVEL 0 IN 0 MM TO 1 2 IN 13 MM MAX UPFLOW OR DOWNFLOW HORIZONTAL MIN 1 4 IN 6 MM TO 1 2 IN 13 MM MAX A11237 Fig 22 Furnace Pitch Requirements 987MA ...

Page 27: ...6 Fig 23 Upflow Return Air Configurations and Restrictions A11037 Fig 24 Downflow Return Air Configurations and Restrictions HORIZONTAL TOP RETURN NOT PERMITTED FOR ANY MODEL A11038 Fig 25 Horizontal Return Air Configurations and Restrictions 987MA ...

Page 28: ...ig 26 Working Platform for Attic Installation NOTE Local codes may require a drain pan and condensate trap when a condensing furnace is installed over a finished ceiling 2 IN 51 mm COMBUSTION AIR PIPE SEE VENTING SECTION A11155 Fig 27 Suspended Furnace Installation NOTE Local codes may require a drain pan and condensate trap when a condensing furnace is installed over a finished ceiling 987MA ...

Page 29: ...ections to furnace with code approved tape or duct sealer NOTE Flexible connections should be used between ductwork and furnace to prevent transmission of vibration Ductwork passing through unconditioned space should be insulated to enhance system performance When air conditioning is used a vapor barrier is recommended Maintain a 1 in 25 mm clearance from combustible materials to supply air ductwo...

Page 30: ...1095 1095 1090 1080 1065 1050 1035 1020 Intermediate Heat Airflow 3 535 515 505 515 495 See note 4 Minimum Heat Airflow 3 420 410 415 400 380 See note 4 Unit Size Clg CF Switch Settings External Static Pressure ESP SWx 3 SWx 2 SWx 1 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 0 60060 Clg Default OFF OFF OFF 1735 1735 1725 1715 1700 1685 1665 1650 1625 1605 CF Default OFF OFF OFF 545 530 520 525 510 See ...

Page 31: ...25 1190 Intermediate Heat Airflow 3 755 745 755 755 765 See note 4 Minimum Heat Airflow 3 620 625 630 620 610 See note 4 Unit Size Clg CF Switch Settings External Static Pressure ESP SWx 3 SWx 2 SWx 1 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 0 60080 Clg Default OFF OFF OFF 1745 1755 1755 1760 1755 1750 1745 1725 1705 1685 CF Default OFF OFF OFF 700 710 750 725 750 See note 4 Cooling SW2 Cont Fan SW3 ...

Page 32: ...OFF ON ON 1095 1100 1110 1105 1085 See note 4 ON OFF OFF 1265 1255 1265 1280 1275 1285 1270 1260 1250 1230 ON OFF ON 1465 1455 1470 1465 1465 1470 1455 1450 1435 1415 ON ON OFF 1850 1855 1860 1855 1850 1830 1805 1775 1750 1730 ON ON ON 2200 2200 2200 2190 2185 2170 2145 2085 1990 1890 Clg SW2 Maximum Clg Airflow 2 2200 2200 2200 2190 2185 2170 2145 2085 1990 1890 Heating SW1 Maximum Heat Airflow 3...

Page 33: ... new listed connector Do not use a connector which has previously served another gas appliance Black iron pipe shall be installed at the furnace gas control valve and extend a minimum of 2 in 51 mm outside the furnace WARNING FURNACE DAMAGE HAZARD Failure to follow this caution may result in furnace damage Connect gas pipe to furnace using a backup wrench to avoid damaging gas controls and burner ...

Page 34: ... after servicing WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death Blower door switch opens 115 v power to control No component operation can occur Do not bypass or close switch with blower door removed WARNING See Fig 33 for field wiring diagram showing typical field 115 v wiring Check all factory and field electrical connections for tightness...

Page 35: ...ing Side NOTE Check that duct on side of furnace will not interfere with installed electrical box 1 Fasten a field supplied external electrical box to the outside of the casing by driving two field supplied screws from in side electrical box into casing See Fig 31 2 Route field power wiring into external electrical box 3 Pull furnace power wires through 1 2 in 12 mm diameter hole in J Box If neces...

Page 36: ...olation relay may be required Connect the 24 VAC coil of the isolation relay to the HUM and COM 24V screw terminal on the control board thermostat strip See Fig 32 3 Communication Connector communication connection This connection is used when the furnace is controlled by an optional communicating User Interface instead of a standard thermostat The communication plug is supplied with the User Inte...

Page 37: ...6 Fig 30 Installing J Box When Used Appearance May Vary COPPER WIRE ONLY ELECTRIC DISCONNECT SWITCH ALUMINUM WIRE GROUND NEUTRAL LINE VOLTAGE A11146 Fig 31 Field Supplied Electrical Box on Furnace Casing 987MA ...

Page 38: ...w Terminal on Thermostat Strip To HUM Terminal On Furnace Control Board To Humidifier Leads A11157 Fig 32 Field supplied Isolation Relay for Humidifiers with Internal Power Supply W W1 W2 COM Y Y2 R G A11401 Fig 33 Typical Field Wiring Diagram 987MA ...

Page 39: ...US AND COMM LED LIGHTS SW1 SETUP SWITCHES AND BLOWER OFF DELAY MODEL PLUG CONNECTOR AIR CONDITIONING A C AIRFLOW SETUP SWITCHES COMMUNICATION CONNECTOR CONTINUOUS FAN CF AIRFLOW SETUP SWITCHES OUTDOOR AIR TEMP CONNECTOR HUMIDIFIER TERMINAL 24 VAC 0 5 AMP MAX ACRDJ AIR CONDITIONING RELAY DISABLE JUMPER FLASH UPGRADE CONNECTOR FACTORY ONLY SW4 SETUP SWITCHES SOFTWARE VERSION PART NUMBER AND DATE COD...

Page 40: ...tage Furnace with Single Speed Heat Pump Modulating and 2 Stage Furnace with Two Speed Heat Pump See notes 2 5 7 10 11 16 and 17 See notes 1 2 4 6 7 9 10 11 15 16 and 17 THERMOSTAT THERMOSTAT THERMOSTAT THERMOSTAT D D D D See notes 2 5 8 10 11 12 16 and 17 See notes 1 2 3 4 6 8 9 10 12 13 15 16 and 17 A12222 Fig 35 Thermostat Wiring Diagrams 987MA ...

Page 41: ...ernal drain trap available from the furnace manufacturer have been certified to ULC S636 for use with those Royal Pipe and IPEX PVC vent components which have been certified to this standard In Canada the primer and cement must be of the same manufacturer as the vent system GVS 65 Primer Purple for Royal Pipe or IPEX System 636 PVC CPVC Primer Purple Violet for Flue Gas Venting and GVS 65 PVC Solv...

Page 42: ...Direct Vent 2 Pipe system or Fig 48 for ventilated combustion air option A furnace shall not be connected to a chimney flue serving a separate appliance designed to burn solid fuel Other gas appliances with their own venting system may also use 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 manufact...

Page 43: ...ation could result in carbon monoxide poisoning or death The instructions included with this furnace DO NOT APPLY to vent systems that are located below the furnace CAREFULLY FOLLOW THE INSTRUCTIONS PROVIDED WITH THE EXTERNAL VENT TRAP KIT FOR LAYING OUT THE VENTING SYSTEM AND THE DRAIN SYSTEM when all or part of the venting system is placed below the furnace Proper configuration of the venting an...

Page 44: ...line must be used See Fig 49 The concentric vent kit currently cannot be modified to attach an elbow to the vent portion of the rain cap A tee attached to the rain cap could potentially direct the flue gas plume toward the intake air stream and contaminate the incoming combustion air for the furnace Refer to Fig 49 for terminations approved for use in Alberta and Saskatchewan Size the Vent and Com...

Page 45: ...ication for that specific furnace input size Compare the Total Equivalent Vent Length TEVL to the MEVL 8 If the Total Equivalent Vent Length is shorter than the Maximum Equivalent Vent Length for the diameter of pipe chosen then that diameter of pipe selected may be used 9 If the Total Vent Length is longer than the Maximum Equivalent Vent Length for the diameter of pipe chosen that diameter pipe ...

Page 46: ... furnace with sheet metal screws 4 Slide the end of the rubber vent coupling with notches in it over the standoffs on the vent pipe adapter 5 Insert a length of vent pipe through the coupling into the outlet of the vent elbow 6 Tighten the clamp around the outlet of the vent elbow Torque the clamp to 15 lb in The following instructions are for PVC ABS DWV vent piping only DO NOT USE THESE TECHNIQU...

Page 47: ... for each pipe of the required diameter will be necessary It is recommended that the flashing be installed by a roofer or competent professional prior to installing the concentric vent The terminations can be installed on a flat or pitched roof Concentric Vent Single or multiple concentric vent must be installed as shown in Fig 47 Maintain the required separation distance between vents or pairs of...

Page 48: ...t elbow 90_ from position 4 Disassemble loose pipe fittings Clean and cement using same procedures as used for system piping DO NOT CE MENT POLYPROPYLENE FITTINGS For ventilated Combustion Air Terminations terminate as shown in Fig 48 Direct Vent 2 Pipe System ONLY When two or more furnaces are vented near each other two vent terminations may be installed as shown in Fig 47 but next vent terminati...

Page 49: ...6 10 7 36 0 32 6 28 0 23 2 10 7 39 6 38 1 33 2 27 4 0 20 Ft 22 0 16 0 14 0 7 0 0 0 35 0 69 0 60 0 49 0 35 0 35 0 83 0 72 0 60 0 45 0 M 6 7 4 9 4 3 2 1 0 0 10 7 21 0 18 3 14 9 10 7 10 7 25 3 21 9 18 3 13 7 20 30 Ft 11 0 5 0 2 0 0 0 0 0 35 0 46 0 39 0 29 0 16 0 35 0 57 0 48 0 37 0 23 0 M 3 4 1 5 0 6 0 0 0 0 10 7 14 0 11 9 8 8 4 9 10 7 17 4 14 6 11 3 7 0 40 40 Ft 4 0 0 0 0 0 0 0 0 0 35 0 33 0 26 0 17...

Page 50: ...000 25 7 6 85 25 9 155 47 2 210 64 0 232 70 7 100 000 NA 40 12 2 98 29 9 211 64 3 236 71 9 120 000 NA NA 8 2 4 86 26 2 224 68 3 4001 to 4500 1219 to 1370 60 000 35 10 7 115 35 1 204 62 2 228 69 5 NA 80 000 23 7 0 85 25 9 150 45 7 202 61 6 224 68 3 100 000 NA 40 12 2 94 28 7 205 62 5 229 69 8 120 000 NA NA NA 83 25 3 217 66 1 See notes at end of venting tables See Table 17 for altitudes over 4500 f...

Page 51: ...lent Vent Length TEVL 112 ft Add all of the above lines Maximum Equivalent Vent Length MEVL 127 ft For 2 pipe from Table 15 Is TEVL less than MEVL YES Therefore 2 pipe may be used Example 2 A direct vent 60 000 Btuh furnace installed at 2100 ft 640 M Venting system includes FOR EACH PIPE 100 feet 30 M of vent pipe 95 feet 28 M of combustion air inlet pipe 3 90_ long radius elbows and a polypropyle...

Page 52: ...A 29 8 8 73 22 3 167 50 9 182 55 5 120 000 NA NA NA 62 18 9 175 53 3 8001 to 9000 2438 to 2743 60 000 30 9 1 82 25 0 152 46 3 168 51 2 NA 80 000 17 5 2 62 18 9 111 33 8 148 45 1 156 47 5 100 000 NA 27 8 2 67 20 4 157 47 9 170 51 8 120 000 NA NA NA 56 17 1 164 50 0 9001 to 10 000 2743 to 3048 60 000 27 8 2 76 23 2 142 43 3 156 47 5 NA 80 000 15 4 6 57 17 4 103 31 4 137 41 8 142 43 3 100 000 NA 24 7...

Page 53: ...TING INDUCER ASSEMBLY INDUCER OUTLET VENT ELBOW CLAMP TORQUE 15 LB IN VENT ELBOW VENT PIPE CLAMP TORQUE 15 LB IN A11286 Fig 37 Inducer Vent Elbow Appearance May Vary FURNACE PIPE DIAMETER TRANSITION IN VERTICAL SECTION NOT IN HORIZONTAL SECTION A93034 Fig 38 Combustion Air and Vent Pipe Diameter Transition Location and Elbow Configuration 987MA ...

Page 54: ...r combustion air connection UPFLOW VERTICAL VENT A11310A Fig 39 Upflow Configurations Appearance may vary See Notes for Venting Options 1 2 3 4 5 6 7 5 Rotate vent elbow to required position DOWNFLOW LEFT CONFIGURATION A11311A 1 2 3 4 5 6 7 5 Rotate vent elbow to required position Any other unused knockout may be used for combustion air connection DOWNFLOW RIGHT CONFIGURATION A11312A Requires Acce...

Page 55: ...FT RIGHT VENT CONFIGURATION A11329A Fig 41 Horizontal Left Appearance may vary See Notes for Venting Options ALTERNATE COMBUSTION AIR CONNECTIONS HORIZONTAL RIGHT VERTICAL VENT CONFIGURATION A11337 Requires Internal Vent Kit See Product Data for Current Kit Number HORIZONTAL RIGHT LEFT VENT CONFIGURATION A11336 ALTERNATE COMBUSTION AIR CONNECTIONS HORIZONTAL RIGHT RIGHT VENT CONFIGURATION A11335 F...

Page 56: ... VENT PIPE FLUSH SHOWING COUPLING VENT PIPE FLUSH WITH ADAPTER VENT PIPE ADAPTER WITH GASKET INSTALLED ON FURNACE VENT PIPE IS CUT FLUSH WITH TOP OF ADAPTER PRIME AND CEMENT VENT PIPE TO ADAPTER ALLOW TO DRY BEFORE INSTALLING VENT COUPLING ALIGN NOTCHES IN VENT PIPE COUPLING OVER STAND OFF ON ADAPTER TORQUE LOWER CLAMP 15 LB IN WHEN REMAINING VENT PIPE IS INSTALLED TORQUE UPPER CLAMP TO 15 LB IN A...

Page 57: ...sides beneath the floor See Note 4 Manufacturer s Recommendation See Notes 3 8 M Clearance to each side of the centerline extended above or below vent terminal of the furnace to a dryer or water heater vent or other appliance s vent intake or exhaust 12 in 305 mm 12 in 305 mm N Furnace combustion air intake clearance to a water heater vent dryer vent or other types of appliance exhaust 3 ft 9 M 3 ...

Page 58: ...of two sides beneath the floor See Note 4 Manufacturer s Recommendation See Notes 3 8 M Clearance to each side of the centerline extended above or below vent terminal of the furnace to a dryer or water heater vent or other appliance s direct vent intake or exhaust 12 in 305 mm 12 in 305 mm N Clearance to a moisture exhaust duct dryer vent spa exhaust etc 12 in 305 mm See Note 4 12 in 305 mm See No...

Page 59: ...r is greater Side wall termination with 2 elbows preferred 12 in min 305 mm from overhang or roof Maintain 12 in 305mm minimum clearance above highest anticipated snow level or grade whichever is greater 6 in 152mm minimum clearance between wall and end of vent pipe 10 in 254mm maximum pipe lengt h Sidewall Termination with Straight Pipe preferred Roof Termination Preferred Vent Maintain 12 in min...

Page 60: ... 305 MM CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW LEVEL OR GRADE WHICHEVER IS GREATER COMBUSTION AIR ELBOW PARALLEL TO WALL OVERHANG 12 IN 305 MM MIN GROUND LEVEL OR ANTICIPATED SNOW LEVEL EXHAUST CLEARANCE TO OVERHANG PER CODE OPTIONAL BRACKET COUPLING 12 IN 305 MM MIN SEPARATION BETWEEN BOTTOM OFCOMBUSTION AIR AND BOTTOM OF VENT A13078 Fig 49 Alberta and Saskatchewan Vent Termination 987MA ...

Page 61: ...Pipe hangar Ventilated Combustion Air intake termination in crawl space Ventilated Combustion Air intake pipe CRAWL SPACE ATTIC highest level of insulation A10497 Fig 50 Vent Terminations for Ventilated Combustion Air 987MA ...

Page 62: ...FIGURATIONS A12220 Fig 51 Sample Inlet Air Pipe Connection for Polypropylene Venting Systems Representative drawing only some models may vary in appearance TO CODEïAPPROVED DRAIN OR CONDENSATE PUMP L1 L12F028 Fig 52 Optional Combustion Air Inlet Moisture Trap 987MA ...

Page 63: ...n on the unit wiring label Setup Switches SW1 The furnace control has 8 setup switches that may be set to meet the application requirements Refer to Fig 57 and the Adjustments section for setup switch configurations To set these setup switches for the appropriate requirement 1 Remove blower door 2 Locate setup switches on furnace control 3 Configure the set up switches as necessary for the applica...

Page 64: ...NACE DAMAGE HAZARD Failure to follow this caution could result in reduced furnace life DO NOT push or force gas valve adjusting screw This can result in damage to the adjustment screw resulting in incorrect manifold pressure which can result in a no heat situation or shorten the life of the heat exchangers CAUTION FIRE HAZARD Failure to follow this warning could result in personal injury death and...

Page 65: ...r input rate Manifold pressure 3 4 in w c for maximum heat 0 55 in w c for minimum heat NOTE To convert gas manifold Table pressures to Pascals multiply the in w c value by 249 1 Pa in w c 1 in w c 249 1 Pa Check Inlet Gas Pressure The inlet gas pressure must be checked with the furnace operating in maximum heat This is necessary to make sure the inlet gas pressure does not fall below the minimum ...

Page 66: ...e plug and re install in the gas valve 11 Re install cap over adjustment screw on the top of the gas valve Clocking The Meter Verify natural gas input rate by clocking meter NOTE Contact your HVAC distributor or gas supplier for metric gas meter Tables if required 1 Turn off all other gas appliances and pilots served by the meter 2 Move setup switches SW1 2 to ON position and SW4 2 to OFF This kee...

Page 67: ...rify the proper rise range If the temperature rise is too high or too low in Minimum Heat 1 Remove jumpers from R and W W1 2 Wait until the blower off delay is completed 3 Turn 115 VAC power off 4 Check the position of setup switch SW1 3 When set to ON airflow is raised 18 for Minimum Heat and for Intermediate Heat Factory default position is OFF 5 Turn 115 VAC power on 6 Re check Minimum Heat Tem...

Page 68: ...just Thermostat Heat Anticipator 1 Mechanical thermostat Set thermostat heat anticipator to match the amp draw of the electrical components in the R W W1 circuit Accurate amp draw readings can be obtained at the wires normally connected to thermostat subbase terminals R and W The thermostat anticipator should NOT be in the circuit while measuring current a Set SW1 2 switch on furnace control board...

Page 69: ... clockwise to decrease rate A10496 Fig 53 Gas Valve BURNER ORIFICE A93059 Fig 54 Orifice Hole R Y W G 10 TURNS THERMOSTAT SUBBASE TERMINALS WITH THERMOSTAT REMOVED ANITICIPATOR CLOCK ETC MUST BE OUT OF CIRCUIT HOOK AROUND AMMETER EXAMPLE 5 0 AMPS ON AMMETER 10 TURNS AROUND JAWS 0 5 AMPS FOR THERMOSTAT ANTICIPATOR SETTING FROM UNIT 24 V CONTROL TERMINALS A96316 Fig 55 Amp Draw Check with Ammeter 98...

Page 70: ...70 338307 201 Rev F A11594 Fig 56 Service Label Information 987MA ...

Page 71: ...80 060060 060080 066100 066120 042060 042080 060060 060080 066100 066120 042060 042080 060060 060080 066100 066120 042060 042080 060060 060080 066100 066120 A12180 Fig 56 Furnace Setup Switches and Description 987MA ...

Page 72: ...SW1 8 Blower OFF delay ON or OFF Blower Off Delay time adjustable 90 seconds to 180 seconds See table in Adjustments section or refer to unit wiring diagram SW4 2 Intermediate Heat Only Adaptive Heat Mode when both SW1 2 and SW4 2 are OFF OFF Allows additional CFM per ton selections when used with SW SW4 3 CFM per ton Adjust OFF Allows additional CFM per ton selections when used with SW 1 5 325 CF...

Page 73: ...69 138 346 13 277 555 1385 53 68 136 340 14 257 514 1286 54 67 133 333 15 240 480 1200 55 65 131 327 16 225 450 1125 56 64 129 321 17 212 424 1059 57 63 126 316 18 200 400 1000 58 62 124 310 19 189 379 947 59 61 122 305 20 180 360 900 60 60 120 300 21 171 343 857 62 58 116 290 22 164 327 818 64 56 112 281 23 157 313 783 66 54 109 273 24 150 300 750 68 53 106 265 25 144 288 720 70 51 103 257 26 138...

Page 74: ...3 3 7 0 60 875 44 3 6 0 60 44 3 7 0 60 43 3 4 0 55 43 3 5 0 55 4000 900 44 3 4 0 55 44 3 5 0 55 44 3 7 0 60 44 3 8 0 60 1219 925 44 3 2 0 50 44 3 4 0 55 44 3 5 0 55 44 3 6 0 55 950 45 3 7 0 60 44 3 2 0 50 44 3 3 0 55 44 3 4 0 55 750 42 3 3 0 50 42 3 4 0 55 42 3 5 0 55 42 3 6 0 55 4001 775 43 3 7 0 60 43 3 8 0 60 42 3 3 0 50 42 3 4 0 55 1220 800 43 3 5 0 55 43 3 6 0 60 43 3 7 0 60 43 3 8 0 60 825 4...

Page 75: ...4 3 3 0 55 44 3 4 0 55 44 3 5 0 55 44 3 7 0 60 2438 800 45 3 8 0 60 44 3 2 0 50 44 3 3 0 55 44 3 4 0 55 825 46 3 7 0 60 46 3 8 0 60 45 3 8 0 60 44 3 2 0 50 625 42 3 4 0 55 42 3 5 0 55 42 3 6 0 55 42 3 7 0 60 8001 650 43 3 8 0 60 42 3 2 0 50 42 3 3 0 55 42 3 4 0 55 2439 675 43 3 5 0 55 43 3 6 0 60 43 3 7 0 60 42 3 2 0 50 700 44 3 7 0 60 43 3 4 0 55 43 3 5 0 55 43 3 6 0 55 725 44 3 5 0 55 44 3 6 0 6...

Page 76: ... 6 0 55 43 3 8 0 60 875 44 3 7 0 60 44 3 8 0 60 43 3 4 0 55 43 3 6 0 55 4000 900 44 3 5 0 55 44 3 6 0 55 44 3 7 0 60 43 3 4 0 55 1219 925 44 3 3 0 50 44 3 4 0 55 44 3 5 0 55 44 3 6 0 55 950 45 3 8 0 60 44 3 2 0 50 44 3 4 0 55 44 3 5 0 55 750 42 3 3 0 50 42 3 4 0 55 42 3 6 0 55 42 3 7 0 55 4001 775 43 3 8 0 60 42 3 2 0 50 42 3 3 0 50 42 3 4 0 55 1220 800 43 3 6 0 55 43 3 7 0 60 43 3 8 0 60 42 3 2 0...

Page 77: ...000 775 44 3 4 0 55 44 3 5 0 55 44 3 6 0 55 44 3 7 0 60 2438 800 44 3 2 0 50 44 3 3 0 50 44 3 4 0 55 44 3 5 0 55 825 46 3 8 0 60 45 3 7 0 60 44 3 2 0 50 44 3 3 0 50 625 42 3 4 0 55 42 3 5 0 55 42 3 7 0 55 42 3 8 0 60 8001 650 42 3 2 0 50 42 3 3 0 50 42 3 4 0 55 42 3 5 0 55 2439 675 43 3 6 0 55 43 3 7 0 60 43 3 8 0 60 42 3 2 0 50 700 44 3 8 0 60 43 3 4 0 55 43 3 6 0 55 43 3 7 0 55 725 44 3 6 0 55 4...

Page 78: ...hut off during furnace servicing Lock out and tag switch with a suitable warning label WARNING The electrical ground and polarity for 115 v wiring must be properly maintained Refer to Fig 33 for field wiring information and to Fig 66 for furnace wiring information NOTE If the polarity is not correct the STATUS LED on the control will flash rapidly and prevent the furnace from heating The control s...

Page 79: ...etup switch SW1 6 to OFF and then back ON f Turn setup switch SW1 6 OFF 6 RELEASE BLOWER DOOR SWITCH reattach wire to R terminal on furnace control board and replace blower door Care and Maintenance FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in personal injury death and or property damage Never store flammable or combustible materials on near or in contact with the furnac...

Page 80: ...se motors can be identified by the absence of oil ports on each end of the motor The following items should be performed by a qualified service technician Clean blower motor and wheel as follows 1 Turn off electrical supply to furnace 2 Remove blower door 3 All factory wires can be left connected but field thermostat and accessory wiring may need to be disconnected depend ing on their length and r...

Page 81: ...3 1 Disconnect power at external disconnect fuse or circuit breaker 2 Turn off gas at external shut off or gas meter 3 Remove control door and set aside 4 Turn electric switch on gas valve to OFF 5 Disconnect the gas pipe from gas valve and remove pipe from the furnace casing 6 Disconnect the connector harness from gas valve Modulat ing only or remove individual wires from terminals on gas valve A...

Page 82: ... supplies to the furnace and install lockout tag before performing any maintenance or service Follow the operating instructions on the label attached to the furnace WARNING 1 Turn off gas and electrical supplies to furnace 2 Remove control door 3 Disconnect pressure switch tube from pressure switch port NOTE Ensure the pressure switch tube disconnected from the pressure switch is higher than the c...

Page 83: ... of soot and carbon indicates that a problem exists which needs to be corrected such as improper adjustment of manifold pressure insufficient or poor quality combustion air improper vent termination incorrect size or damaged manifold orifice s improper gas or a restricted heat exchanger primary or secondary Action must be taken to correct the problem 1 Turn off gas and electrical supplies to furna...

Page 84: ...extended period of time when temperatures will reach 32_F 0_C or lower unless winterized Follow these procedures to winterize your furnace UNIT COMPONENT DAMAGE HAZARD Failure to follow this caution may result in damage to the furnace and other property damage Do not use ethylene glycol automotive antifreeze coolant or equivalent Failure of plastic components may occur CAUTION 1 Obtain propylene g...

Page 85: ... A12278 Fig 59 Igniter Position Side View A11392 Fig 60 Priming Condensate Trap Appearance May Vary A11273 Fig 61 Cleaning Heat Exchanger Cell Burner Flame Burner Manifold A11461 Fig 62 Burner Flame FLAME SENSOR BELOW BURNER FLAME ROLLOUT SWITCH BRACKET IGNITER IGNITER BURNER SUPT ASSY BURNER ASSY A11403 Fig 63 Burner Assembly 987MA ...

Page 86: ...SCREW MOTOR ARM GROMMET SCREW LOCATION BLOWER HSG ASSY BRACKET BRACKET ENGAGEMENT SEE DETAIL A CAPACITOR OR POWER CHOKE WHEN USED BRACKET SCREW GND BLOWER HSG ASSY MOTOR BLOWER WHEEL BLOWER CUTOFF BLOWER DETAIL A A11584 Fig 64 Blower Assembly 987MA ...

Page 87: ...s will repeat Status codes are erased after 72 hours or can be manually erased by putting setup switch SW1 1 in the ON position and jumpering R W W1 and Y Y2 simultaneously until status code 11 is flashed When done put setup switch SW1 1 in the OFF position Was there a previous status code other than 11 Go to section below for the status code that was flashed Does the control respond to W W1 W2 Y1...

Page 88: ...es before lockout 14 occurs If flame signal is lost during the blower on delay period blower will come on for the selected blower off delay Check the following items first before proceeding to the next step Gas valve turned off Manual shut off valve GREEN YELLOW wire MUST be connected to furnace sheet metal Flame sensor must not be grounded To determine whether the problem is in the gas valve igni...

Page 89: ... 2 YELLOW and PL13 4 GREEN Is there 5 VDC at PL3 3 YELLOW and PL3 2 GREEN NO NO You have an open wire or bad terminal on the YELLOW wire between the furnace control and the blower motor YES YES The voltage just measured should be very stable and should not fluctuate more than 02 VDC If the voltage fluctuates more than this get a different voltmeter before proceeding Turn power off disconnect PL13 ...

Page 90: ...ing rate after starting and operating for 45 seconds at intermediate heat The furnace control CPU defaults to minimum heat on the first thermostat cycle and calculates the modulating rate that the furnace should run at for 19 minutes on subsequent heat cycles If the power is interrupted the stored modulating rate is erased and the furnace control will select intermediate heat for 45 seconds minimu...

Page 91: ...l increase the inducer motor speed to the maximum heat inducer motor RPM The blower motor BLWM will trans ition to the maximum heat airflow five seconds after the furnace control CPU switches from a medium range input to maximum heat As the inducer RPM increases the high pressure switch HPS should close 8 Blower Off Delay When the thermostat is satisfied the R to W circuit is opened de energizing ...

Page 92: ...J must be connected to enable the adaptive cooling mode in response to a call for cooling See Fig 34 When in place the furnace control CPU can turn on the air conditioning relay ACR to energize the Y Y2 terminal and switch the outdoor unit to high cooling The furnace control CPU can start up the cooling unit in either low or high cooling If starting up in low cooling the furnace control CPU determ...

Page 93: ... and 25 seconds in maximum heat allowing the furnace heat exchangers to heat up more quickly then restarts at the end of the blower ON delay period at modulating or maximum heat airflow respectively The blower motor BLWM will revert to continuous blower airflow after the heating cycle is completed When the thermostat satisfies the furnace control CPU will drop the blower motor BLWM to minimum heat...

Page 94: ...94 338307 201 REV F A13334 Fig 66 Wiring Diagram 987MA ...

Page 95: ...fied 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 Box 4952 Syracuse New York 13221 4952 1 800 428 4326 Have available the model number series number and serial number located on the unit rating plate to ensure correct...

Page 96: ...nue or change at any time specifications or designs without notice and without incurring obligations E2013 Bryant Heating Cooling Systems D 7310 W Morris St D Indianapolis IN 46231 Edition Date 11 13 Replaces II987MA 06 Catalog No II987MA 07 987MA ...

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