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Bryant 987MB, Installation, Start-Up, Operating And Service And Maintenance Instructions

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Bryant 987MB Installation, Start-Up, Operating And Service And Maintenance Instructions Download Page 34

987MB: Installation, Start-up, Operating and Service and Maintenance Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

34

A13305

Fig. 40 – Combustion Air and Vent Pipe Termination for Direct Vent (2-Pipe) System

A05091

Fig. 41 – Vent Pipe Termination for Non-Direct Vent and Ventilated Combustion Air System

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12 in. (305mm) min. separation 
between bottom of combustion
air and bottom of vent (Typ.)

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Summary of Contents for 987MB

Page 1: ...Input Rate 59 Table 20 Orifice Size and Manifold Pressure In W C for Gas Input Rate 59 SERVICE AND MAINTENANCE PROCEDURES 60 Winterization 66 SEQUENCE OF OPERATION 70 PARTS REPLACEMENT INFORMATION GUI...

Page 2: ...exterior of the building at a minimum height of eight 8 feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment The sign...

Page 3: ...RNING FIRE INJURY OR DEATH HAZARD Failure to follow this warning could result in property damage personal injury or death This furnace was manufactured to operate with natural gas When fuel supply is...

Page 4: ...er 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 as specified in the Gas Piping section 6 Alway...

Page 5: ...calculate heating load estimates and select the furnace Excessive oversizing of the furnace may cause the furnace and or vent to fail prematurely customer discomfort and or vent freezing Failure to f...

Page 6: ...s Piping and Gas Pipe Pressure Testing US Current edition of NFPA 54 ANSI Z223 1 NFGC Chapters 5 6 7 and 8 and national plumbing codes CANADA Current edition of CAN CSA B149 1 Parts 4 5 6 and 9 In the...

Page 7: ...ngs under construction provided that The furnace is permanently installed with all electrical wiring piping venting and ducting installed according to these installation instructions A return air duct...

Page 8: ...elow can be used to ensure that other gas appliances have sufficient air for combustion Provisions for adequate combustion ventilation and dilution air must be provided in accordance with U S A Instal...

Page 9: ...BTUH 734 SQ MM KW TWO OPENINGS OR VERTICAL DUCTS 1 SQ IN 4 000 BTUH 550 SQ MM KW Free Area of Opening and Duct Sq In Sq mm Round Duct In mm Dia Free Area of Opening and Duct Sq In Sq mm Round Duct In...

Page 10: ...lief port on condensate trap Remove pressure switch tube from pressure switch port Remove trap from collector box Loosen clamp on inlet to vent elbow Remove middle and bottom plugs DO NOT DISCARD Remo...

Page 11: ...or the current edition National Plumbing Code of Canada in Canada A170135 Fig 11 Example of Field Drain Attachment A14532 Fig 12 Example of Field Drain Attachment Not Allowed NOTICE The condensate tr...

Page 12: ...nstructed from field supplied 1 2 in CPVC or 3 4 in PVC pipe in compliance with local building codes A factory supplied 1 2 in CPVC to 3 4 in PVC adapter is supplied in the loose parts bag for use as...

Page 13: ...Open the spring clamp and insert the long end of the adapter or the 1 2 in CPVC pipe into the outlet stub on the drain tube 17 Connect additional condensate piping to a code approved drain or to a co...

Page 14: ...DO NOT cut main furnace casing side to attach supply air duct humidifier or other accessories All supply side accessories MUST be connected to duct external to furnace main casing A10493 Fig 19 Duct...

Page 15: ...nstall as shown in Fig 24 NOTE It is recommended that the perforated supply air duct flanges be completely removed from furnace when installing the furnace on a factory supplied cased coil or coil box...

Page 16: ...ions on Noncombustible Flooring subbase not required 15 7 8 403 19 483 16 1 2 419 19 5 8 498 Downflow applications on combustible flooring subbase required 15 1 8 384 19 483 16 3 4 425 20 5 8 600 Down...

Page 17: ...the Media Cabinet or field supplied accessory air cleaner must only be connected to the bottom opening on the furnace see Fig 20 and Fig 25 For horizontal applications the Media Cabinet or field suppl...

Page 18: ...50 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 x 635 mm Factory Accessory Washable Factory Accessory Media Representative Afte...

Page 19: ...tion Start up Operating and Service and Maintenance Instructions Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 19 A11437 Fig 2...

Page 20: ...st be installed parallel with or on the downstream side of the unit to avoid condensation in the heat exchangers When installed parallel with the furnace dampers or other flow control must prevent chi...

Page 21: ...ing As an alternative fibrous ductwork may be used if constructed and installed in accordance with the latest edition of SMACNA construction standard on fibrous glass ducts Both acoustical lining and...

Page 22: ...ting SW1 Maximum Heat Airflow3 1080 1085 1095 1090 1095 1085 1070 1055 1045 1030 Intermediate Heat Airflow3 685 725 730 725 730 See note 4 Minimum Heat Airflow3 560 555 555 550 565 See note 4 Unit Siz...

Page 23: ...ting SW1 Maximum Heat Airflow3 1340 1355 1370 1385 1380 1385 1400 1400 1385 1380 Intermediate Heat Airflow3 780 810 835 840 845 See note 4 Minimum Heat Airflow3 595 595 600 595 605 See note 4 Unit Siz...

Page 24: ...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 18...

Page 25: ...e the furnace has been connected Refer to current edition of NSCNGPIC in Canada After all connections have been made purge lines and check for leakage at furnace prior to operating furnace PRESSURE TE...

Page 26: ...the limitations of 63_F 33_C rise 115 V Wiring Furnace must have a 115 v power supply properly connected and grounded NOTE Proper polarity must be maintained for 115 v wiring If polarity is incorrect...

Page 27: ...f largest operating component s full load amps plus 100 percent of all other potential operating components EAC humidifier etc full load amps MINIMUM WIRE SIZE AWG MAXIMUM WIRE LENGTH FT M Length show...

Page 28: ...casing near the 7 8 in knock out on the side of the casing Do not remove the knock out in the side of the casing 2 Align the J Box bracket with the pilot holes inside the furnace casing 3 Install 2 sc...

Page 29: ...e 24 v circuit contains an automotive type 3 amp fuse located on the control Any direct shorts during installation service or maintenance could cause this fuse to blow If fuse replacement is required...

Page 30: ...on the control board thermostat strip see Fig 38 3 Communication Connector communication connection This connection is used when the furnace is controlled by an optional communicating User Interface i...

Page 31: ...r operation Refer to thermostat instructions 9 Configure thermostat for HYBRIDHEATr dual fuel operation Refer to thermostat instructions 10 NO connection should be made to the furnace HUM terminal whe...

Page 32: ...par le fabricant de cette fournaise ont t certifi s ULCS 636 pour l application des composantes Royal Pipe IPEX PVC qui sont certifi es ce standard Au Canada l appr t et le ciment doivent tre du m me...

Page 33: ...and Materials ASTM standards See Table 11 for approved materials for use in the U S A This furnace is also CSA approved for venting with M G DuraVentRPolyProR or Centrotherm InnoflueR polypropylene v...

Page 34: ...and designs without notice and without obligations 34 A13305 Fig 40 Combustion Air and Vent Pipe Termination for Direct Vent 2 Pipe System A05091 Fig 41 Vent Pipe Termination for Non Direct Vent and...

Page 35: ...ptible to damage or contamination The termination is usually located away from adjacent structures or other obstacles such as inside corners windows doors or other appliances It is less prone to icing...

Page 36: ...an input over 35 000 BTUh If there is less than 4 ft 1 2 M of unobstructed distance to the property line of the adjacent lot no type of vent termination is permitted for appliances with inputs greate...

Page 37: ...m for appliances 50 000 BTUh 15kW K Clearance to a mechanical air supply inlet 6 ft 1 8 M 3ft 9 M above if within 10 ft 3 M horizontally L Clearance under a veranda porch deck or balcony 12 in 305 mm...

Page 38: ...opening 1 ft 3M above the opening Manufacturer s Recommendation See Note 8 K Clearance to a mechanical air supply inlet 6 ft 1 8 M 3ft 9 M above if within 10 ft 3 M horizontally L Clearance under a ve...

Page 39: ...Table for all two pipe terminations or Non Direct Vent Clearance Table for all single pipe terminations For clearance distances when vent termination is located more than 6 ft 2 M away from an inside...

Page 40: ...et Moisture Trap To prevent moisture from trickling into the furnace vestibule a trap can be installed in the intake air pipe near the furnace To prevent moisture 3 76 mm 12 305 mm Pipe hangar Ventila...

Page 41: ...ed on the termination Alberta and Saskatchewan when required record the equivalent length of the Tee used 5 Calculate Total Equivalent Vent Length by adding the equivalent lengths of the fittings to t...

Page 42: ...es cannot exceed total allowable pipe length as calculated from Table 11 A170122A Fig 51 Recommended Combustion Air Inlet Moisture Trap NOTE Maximum Equivalent Vent Length MEVL includes standard and c...

Page 43: ...the casing Fold the knockout down with duct pliers and work the knockout back and forth until it is removed Trim any excess metal from the knockout with tin snips Maximum Equivalent Vent Length Meters...

Page 44: ...lamp to 15 lb in see Fig 52 Fig 57 A14546 Fig 52 Near Furnace Vent Connections A170006 Fig 53 Inducer Vent Elbow Appearance May Vary UPFLOW LEFT CONFIGURATION A11309A UPFLOW RIGHT CONFIGURATION A11308...

Page 45: ...7 HORIZONTAL RIGHT LEFT VENT CONFIGURATION A11336 HORIZONTAL RIGHT RIGHT VENT CONFIGURATION A11335 Fig 57 Horizontal Right Appearance may vary See Notes for Venting Options NOTES FOR VENTING OPTIONS 1...

Page 46: ...4 20 10 50 40 10 75 95 10 75 105 5 55 50 5 65 105 5 65 125 0 10 20 15 10 55 45 10 65 50 5 25 15 5 65 50 5 65 60 20 10 10 10 35 25 10 45 30 5 10 5 5 45 30 5 50 40 40 10 5 10 25 15 10 30 20 5 5 5 30 20...

Page 47: ...pply second coat DO NOT CEMENT POLYPROPYLENE FITTINGS 13 While cement is still wet twist pipe into socket with 1 4 in turn Be sure pipe is fully inserted into fitting socket 14 Wipe excess cement from...

Page 48: ...stalling 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 40 Maintain the required s...

Page 49: ...n two or more furnaces are vented near each other two vent terminations may be installed as shown in Fig 40 but next vent termination or pair of vent terminations must be at least 36 in 914 mm away fr...

Page 50: ...here 70 ft 22 M Use length of the longer of the vent or air inlet piping system Add equiv length of 3 90 long radius elbows use the highest number of elbows for either the vent or inlet pipe 3 x 3 ft...

Page 51: ...djustments section for setup switch configurations To set the desired cooling airflow 1 Remove blower door 2 Locate A C setup switches on furnace control 3 Determine air conditioning tonnage used 4 Co...

Page 52: ...n connection see Fig 61 3 Pour one quart liter of water into funnel tube Water should run through collector box overfill condensate trap and flow into open field drain WARNING CARBON MONOXIDE POISONIN...

Page 53: ...fold pressure tables See Table 13 for 20 000 BTUh Max Heat 8 000 WARNING FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in personal injury death and or property damage Never purg...

Page 54: ...ntil the blower off delay is completed 10 Turn furnace gas valve electric switch to OFF position 11 Turn gas supply manual shutoff valve to OFF position 12 Turn off furnace power supply 13 Remove mano...

Page 55: ...asurement of gas flow 5 Refer to Table 17 for cubic ft of gas per hr Multiply gas rate cu ft hr by heating value BTUh cu ft to obtain input rate 6 If clocked rate does not match required input from St...

Page 56: ...ify 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 Chec...

Page 57: ...up Switch SW3 The Continuous Fan airflow selection via Setup switches SW3 is also the switch setting for low speed cooling when the furnace is used with a two speed cooling or heat pump unit Adjust SW...

Page 58: ...nutes a Gradually block off return air with a piece of cardboard or sheet metal until the limit trips b Unblock return air to permit normal circulation c Burners will re light when furnace cools down...

Page 59: ...0 50 42 3 3 0 55 42 3 4 0 55 650 43 3 5 0 55 43 3 6 0 55 43 3 7 0 60 43 3 8 0 60 675 44 3 7 0 60 44 3 8 0 60 43 3 4 0 55 43 3 5 0 55 10000 700 44 3 4 0 55 44 3 5 0 55 44 3 7 0 60 44 3 8 0 60 3048 725...

Page 60: ...g 60 and the troubleshooting guide which can be obtained from your distributor Retrieving Stored Fault Codes The stored status codes will NOT be erased from the control memory when 115 or 24 v power i...

Page 61: ...pipes or broken fittings Have vent pipes vent system serviced by a qualified service agency 6 Inspect any accessories attached to the furnace such as a humidifier or electronic air cleaner Perform an...

Page 62: ...ng blower wheel on motor shaft NOTE Mark blower mounting arms and blower housing so each arm is positioned at the same hole location during reassembly c Mark blower wheel orientation and cutoff plate...

Page 63: ...up with a small piece of wood or folded cardboard 13 Support the burner assembly and remove the screws that attach the burner assembly to the heat exchanger cell panel 14 Remove wires from both rollou...

Page 64: ...s 5a through 5d 7 Reconnect igniter harness to the igniter dressing the igniter wires to ensure there is no tension on the igniter itself see Fig 68 8 Turn on gas and electrical supplies to furnace 9...

Page 65: ...ating of the tape Check the following 1 Check for signs of physical damage to heat tape such as nicks cuts abrasions gnawing by animals etc 2 Check for discolored heat tape insulation If any damage or...

Page 66: ...e the middle unused rubber plug from the port on the collector box opposite the condensate trap see Fig 61 10 Repeat Steps 5 through 8 11 If a condensate pump is used check with pump manufacturer to v...

Page 67: ...order of occurrence Record status codes until status code 11 flashes 1 short and 1 long flash After status code 11 flashes the status codes will repeat Status codes are erased after 72 hours or can be...

Page 68: ...FAILURE If flame is not sensed during the trial for ignition period the control will repeat the ignition sequence 3 more times before lockout 14 occurs If flame signal is lost during the blower on de...

Page 69: ...e or bad terminal on either the RED or GREEN wire between the furnace control and the blower motor YES Is there 5 VDC at PL13 2 YELLOW and PL13 4 GREEN Is there 5 VDC at PL3 3 YELLOW and PL3 2 GREEN N...

Page 70: ...and the furnace control will select intermediate heat for 45 seconds minimum heat for 19 minutes and then switch to maximum heat as long as the thermostat continues to call for heat The furnace contr...

Page 71: ...s satisfied the R to W circuit is opened de energizing the gas valve GV pin 5 stopping gas flow to the burners and humidifier terminal HUM The inducer motor IDM will remain energized for a 15 second p...

Page 72: ...furnace control CPU will select low cooling for up to 20 minutes and then energize the air conditioning relay ACR to energize the Y Y2 terminal and switch the outdoor unit to high cooling as long as t...

Page 73: ...satisfies the furnace control CPU will drop the blower motor BLWM to minimum heat airflow during the selected blower OFF delay period before transitioning to continuous blower airflow When the thermos...

Page 74: ...art up Operating and Service and Maintenance Instructions Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 74 A200362 Fig 73 Serv...

Page 75: ...up Operating and Service and Maintenance Instructions Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 75 338307 201 Rev N A2003...

Page 76: ...licensed Heating and Air Conditioning company of your choice BRYANT HEATING COOLING SYSTEMS a division of Carrier Corporation 7310 West Morris Street Indianapolis IN 46231 U S A Have available the mo...

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