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Bryant 935CA, Installation, Start-Up, Operating And Service And Maintenance Instructions, Page: 29 / 68

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Bryant 935CA Installation, Start-Up, Operating And Service And Maintenance Instructions Download Page 29

935CA: 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.

29

A190367

Fig. 43 – 1-Speed Variable Furnace with Single-Speed 

Air Conditioner

A190369

Fig. 44 – 1-Speed Variable Furnace with Two-Speed Air 

Conditioner

A190368

Fig. 45 – 1-Speed Variable Furnace with Single-Speed Heat Pump 

(Dual Fuel)

A190370

Fig. 46 – 1-Speed Variable Furnace with Two-Speed Heat Pump 

(Dual Fuel)

THERMOSTAT

THERMOSTAT

See notes 2, 5, 8, 10, 11

THERMOSTAT

See notes 1, 2, 4, 6, 7, 9, 10, 14

See notes 1, 2, 3, 4, 6, 8, 9, 10, 11, 12, 14

NOTE 11

THERMOSTAT

Summary of Contents for 935CA

Page 1: ...as Heat Values at Altitude 80 000 50 Table 23 Gas Valve Outlet Pressure for Gas Heat Values at Altitude 100 000 51 Table 24 Gas Rate CU ft hr 51 Table 25 Blower Off Delay Setup Switch 52 SERVICE AND M...

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: ...lteration service maintenance or use can cause carbon monoxide poisoning explosion fire electrical shock or other conditions which may cause personal injury or property damage Consult a qualified serv...

Page 4: ...rged outdoors Connect this furnace to an approved vent system only as specified in the Venting section of these instructions 5 Never test for gas leaks with an open flame Use a commercially available...

Page 5: ...furnace Excessive oversizing of the furnace may cause the furnace and or vent to fail prematurely customer discomfort and or vent freezing Failure to follow these guidelines is considered faulty inst...

Page 6: ...Y WIRE CONNECTED TO THE CONTROL PRIOR TO DISCHARGING YOUR BODY S ELECTROSTATIC CHARGE TO GROUND 2 Firmly touch the clean unpainted metal surface of the furnace chassis which is close to the control To...

Page 7: ...Cements and glues Antistatic fabric softeners for clothes dryers Masonry acid washing materials All fuel burning equipment must be supplied with air for fuel combustion Sufficient air must be provided...

Page 8: ...tion and ventilation air depend upon whether or not the furnace is located in a space having a volume of at least 50 cubic feet per 1 000 BTUh input rating for all gas appliances installed in the spac...

Page 9: ...te permanent ventilation openings directly to outdoors having free area of at least 1 in 2 4 000 BTUh of total input rating for all gas appliances in the space 3 In spaces that use the Indoor Combusti...

Page 10: ...148 6 0 30 2 100 59 4 2 800 79 2 3 500 99 1 1820 51 5 2 800 79 2 3 000 84 9 4 000 113 2 5 000 141 5 6 000 169 8 7 000 198 1 0 20 3 150 89 1 4 200 118 9 5 250 148 6 2730 77 3 4 200 118 9 4 500 127 3 6...

Page 11: ...ndensate drain line Wrap the drain trap and drain line with the heat tape and secure with appropriate plastic ties Follow the heat tape manufacturer s recommendations Prime the trap before furnace ope...

Page 12: ...eck that all pre installed gaskets on trap components are present adhered and undamaged Table 5 Condensate Trap Configurations Part Installation Configuration Horizontal Upflow Upflow Offset Required...

Page 13: ...uration Trap Interference A200120 Fig 18 Upflow Right Side Return Configuration Required Upflow Offset Installation WARNING CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result...

Page 14: ...llow for 6 3 8 162 mm of clearance underneath the furnace for the condensate trap and drain line It is recommended to leave an additional 1 clearance under the trap for service see Fig 21 4 Remove app...

Page 15: ...ional condensate piping to a code approved drain or to a condensate pump approved for use with acidic furnace condensate and compatible with mineral and vegetable oils such as canola oil 8 Allow at le...

Page 16: ...and front to back It is allowable to add up to 1 2 in additional slope over length and depth of coil cabinet in the direction of drain pan connection 5 Attach coil casing to furnace using sheet metal...

Page 17: ...Table 11 footnotes for other return air restrictions A200426 Fig 28 Upflow Return Air Configurations and Restrictions A200425 Fig 29 Horizontal Return Air Configurations and Restrictions NOTE Refer to...

Page 18: ...ks or bricks Condensate Trap section for required and recommended clearances for trap installation see Fig 6 Fig 21 and Fig 32 Suspended Furnace Support The furnace must be supported under the entire...

Page 19: ...of the bottom and downward facing side may also be used The upward facing side of the casing cannot be used as a return air connection see Fig 29 Bottom Return Air Inlet These furnaces are shipped wit...

Page 20: ...s sealed to the furnace casing and terminating outside the space containing the furnace Secure ductwork with proper fasteners for type of ductwork used Seal supply and return duct connections to furna...

Page 21: ...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 Face V...

Page 22: ...810 1805 1785 CF Switches SW3 3 SW3 2 SW3 1 Low Clg Default OFF OFF ON 695 700 Note 4 Cooling SW2 Low Cooling SW3 OFF ON OFF 870 885 880 880 Note 4 OFF ON ON 1045 1060 1070 1070 1070 1070 Note 4 ON OF...

Page 23: ...ore and during supply pipe pressure test After all connections have been made purge lines and check for leakage at furnace prior to operating furnace The gas supply pressure shall be within the maximu...

Page 24: ...7 8 inch for 115 VAC Electric GAS SUPPLY MANUAL SHUT OFF VALVE REQUIRED SEDIMENT TRAP UNION NOTE Union may be inside the vestibule where permitted by local codes FRONT WARNING ELECTRICAL SHOCK FIRE OR...

Page 25: ...0263 A190264 Fig 38 Installing J Box When Used External Electrical Box on Furnace Casing NOTE Check to ensure that external electrical box does not interfere with duct work gas piping or the indoor co...

Page 26: ...in relief wire tie on furnace wiring harness 5 Connect field ground wire and factory ground wire to green ground screw on J Box mounting bracket see Fig 38 6 Connect power cord power and neutral leads...

Page 27: ...trolled by a standard type thermostat Refer to the instructions supplied with the User Interface for complete details Alternate Power Supplies This furnace is designed to operate on utility generated...

Page 28: ...MAXIMUM FUSE OR CKT BKR AMPS Time delay type is recommended Maximum Minimum 48060C17 115 60 1 127 104 11 4 12 6 14 29 15 60080C21 115 60 1 127 104 14 3 15 4 12 37 20 66100C21 115 60 1 127 104 14 3 15...

Page 29: ...Speed Variable Furnace with Single Speed Air Conditioner A190369 Fig 44 1 Speed Variable Furnace with Two Speed Air Conditioner A190368 Fig 45 1 Speed Variable Furnace with Single Speed Heat Pump Dual...

Page 30: ...enting systems This furnace is also CSA approved for venting with M G DuraVentR PolyProR or Centrotherm InnoFlueR polypropylene venting systems using single wall straight and flex and required fitting...

Page 31: ...ewall For references to clearances required by National code authorities see Fig 60 OPTIONAL CONFIGURATION FOR COMBUSTION Ventilated Combustion Air Systems In a ventilated combustion air option the ve...

Page 32: ...6 Termination or termination kit should be positioned where vent vapors are not objectionable Direct Vent 2 Pipe System Direct vent 2 pipe vent and combustion air pipes must terminate outside the stru...

Page 33: ...umber of fittings multiplied by the deduction for each type of fitting used see Table 19 A200089 NOTE Only connect combustion air inlet moisture drain downstream of the furnace trap assembly as shown...

Page 34: ...used for Alberta and Saskatchewan terminations NOTE Polypropylene venting systems MAY require additional deductions from the MEVL or additions to the TEVL for vent terminations and flexible pipe secti...

Page 35: ...nnection see Fig 12 Use a flat blade screwdriver and tap on the knockout on opposite sides where the knockout meets the casing Fold the knockout down with duct pliers and work the knockout back and fo...

Page 36: ...PYLENE VENT SYSTEMS SEE POLYPROPYLENE VENT SYSTEM MANUFACTURER S INSTRUCTIONS 13 After pipes have been cut and pre assembled apply generous layer of cement primer to pipe fitting socket and end of pip...

Page 37: ...in 102 mm flashing for a 2 in 50 mm ND concentric vent or a 5 in diameter 127 mm flashing for a 3 in 80 mm ND concentric vent kit For two pipe or single pipe vent systems a flashing for each pipe of t...

Page 38: ...cation for termination kit using the guidelines provided in section Locating The Vent Termination in this instruction 1 Cut two holes one for each pipe of appropriate size for pipe size being used 2 L...

Page 39: ...y See Notes for Venting Options 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 co...

Page 40: ...636 ULC S636 Royal Pipe Schedule 40 ULC S636 ULC S636 ULC S636 ULC S636 PVC and ABS pipe may use either DWV or pressure rated fittings Colored or tinted solvents or primers must be used where required...

Page 41: ...in some cases 13 Elbow and pipe sections within the furnace casing and at the vent termination should not be included in vent length or elbow count 14 The minimum pipe length is 5 ft 2 M linear feet m...

Page 42: ...ere 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 0...

Page 43: ...located on public property 7 ft 2 1 M Clearance under a veranda porch deck or balcony N P No operable windows doors or intakes of any type are permitted on Wall B between the vent termination and the...

Page 44: ...12 in 305 mm 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...

Page 45: ...he side of the 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 Clear...

Page 46: ...172mm for 2 in 51mm Abandoned masonry used as raceway per code 12 in 305 mm min from overhang or roof Maintain 12 in 305mm minimum clearance above highest anticipated snow level or grade whichever is...

Page 47: ...and Continuous Fan airflows The Setup Switch locations are shown and described on Fig 65 The setup switches are also shown on the unit wiring label Setup Switches SW1 The furnace control has 8 setup...

Page 48: ...are used for applications using a communicating User Interface and to adjust airflow SW4 3 is used to adjust airflow Refer to the Adjustments section for setup switch configurations Refer to User Inte...

Page 49: ...een 4 5 in w c 1125 Pa and 13 6 in w c 3388 Pa i Remove jumper across thermostat connections to terminate call for heat Wait until the blower off delay is completed j Turn furnace gas valve electric s...

Page 50: ...3 0 1525 800 2 4 2 5 2 6 2 7 2 7 2 8 825 2 3 2 3 2 4 2 5 2 6 2 7 to 850 2 1 2 2 2 3 2 4 2 4 2 5 875 2 0 2 1 2 2 2 2 2 3 2 4 900 1 9 2 0 2 0 2 1 2 2 2 2 5400 925 1 8 1 9 1 9 2 0 2 1 2 1 1646 950 1 8 1...

Page 51: ...00 950 2 1 2 2 2 2 2 3 2 4 2 4 914 975 2 0 2 0 2 1 2 2 2 3 2 3 1000 1 9 1 9 2 0 2 1 2 1 2 2 775 2 9 3 0 3 1 3 1 3 1 3 1 800 2 7 2 8 2 9 3 0 3 1 3 1 3001 825 2 6 2 6 2 7 2 8 2 9 3 0 915 850 2 4 2 5 2 6...

Page 52: ...l truncate at 2200 CFM on applicable models The high speed or single speed cooling airflow is adjusted by turning Setup switches SW2 1 SW2 2 and SW2 3 either ON or OFF Select the required airflow from...

Page 53: ...must be performed by trained service personnel A qualified service person should inspect the furnace once a year General These instructions are written as if the furnace is installed in an upflow app...

Page 54: ...be present at control and all blower OFF delays must be completed a Leave 115 v power to furnace turned on b Look into blower access door sight glass for current LED status c Remove blower door NOTE...

Page 55: ...lower wheel and motor annually The inducer and blower motors are pre lubricated and require no additional lubrication Clean blower motor and wheel as follows 1 Turn off electrical supply to furnace 2...

Page 56: ...b on the housing 11 Reinstall blower assembly in furnace 12 Reinstall two screws securing blower assembly to blower deck NOTE Refer to motor speed lead relocation if leads were not identified before d...

Page 57: ...0 Turn power on at external disconnect fuse or circuit breaker 11 Run the furnace through two complete heating cycles to check for proper operation 12 Install control door when complete Servicing Hot...

Page 58: ...ing Condensate Drain and Trap NOTE If the condensate trap is removed a new gasket between the trap and collector box is required Verify a condensate trap gasket is included in the service kit or obtai...

Page 59: ...furnace control door WARNING ELECTRICAL SHOCK FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in personal injury or death or property damage Before installing modifying or servic...

Page 60: ...ive seconds after the GVR closes a 2 second flame proving period begins The HSI igniter will remain energized until the flame is sensed or until the 2 second flame proving period begins d Flame Provin...

Page 61: ...the DHUM input logic is reversed The DHUM input is turned ON when no dehumidify demand exists Once 24 vac is detected by the furnace control on the DHUM input the furnace control dehumidification capa...

Page 62: ...pump See Fig 42 and thermostat wiring for connections When installed with a heat pump the furnace control automatically changes the timing sequence to avoid long blower off times during demand defros...

Page 63: ...setup switch SW1 1 in the ON position The AMBER LED 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 s...

Page 64: ...during the trial for ignition period the control will repeat the ignition sequence 3 more times before lockout 14 occurs Iffl ame signal is lost during the blower on delay period blower will come on...

Page 65: ...ither the BLACK or WHITE power leads between the furnace control and the blower motor If you have a power choke disconnect it and check continuity YES YES NO NO Is there 12 VDC at PL13 7 RED and PL13...

Page 66: ...t up Operating and Service and Maintenance Instructions Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 66 346011 2 revA A200312...

Page 67: ...sh Poor inducer flow Excess wind 31 PRESSURE TRANSDUCER INPUT DOES NOT SENSE TARGET PRESSURE OR PRESSURE IS OUT OF RANGE Check for Excessive wind Proper vent sizing Restricted vent Defective inducer m...

Page 68: ...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 model number series number and serial num...

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