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935SA: Installation, Start-up, Operating and Service Maintenance Instructions

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

59

PARTS REPLACEMENT INFORMATION GUIDE

Casing Group

Blower door
Bottom plate
Control door
Door knob assembly
Top filler plate

Electrical Group

3-Amp fuse
Circuit board
Control box
Door switch
Junction box
Limit switch(es)
Transformer

Blower Group

Blower housing
Blower motor
Blower wheel
Cut-off plate

Filter Group

Filter(s)
Media Cabinet (when used)

Gas Control Group

Burner
Flame sensor
Gas valve
Hot surface igniter
Manifold
Orifice

Heat Exchanger Group

Containment plate
Coupling box
Heat exchanger assembly
Primary HX cell panel
Secondary HX assembly
Tubing gaskets

Inducer Group

Collector box
Condensate trap
Condensate trap elbow
Gaskets
Transducer
Inducer motor
Inducer wheel
Vent elbow assembly

TO OBTAIN INFORMATION ON PARTS:

Consult your installing dealer or a 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 model number, series number, and serial number located on the unit rating plate to ensure correct replacement part.

MODEL NOMENCLATURE

TRAINING

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Access My Learning Center with your HVACpartners credentials at

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MODEL

COOLING

CAPACITY

HEATING

CAPACITY

MOTOR

WIDTH

VOLTAGE

FEATURES/

MINOR SERIES

935SA

48

060

E

17

A

B

FIRE, EXPLOSION, ELECTRICAL SHOCK AND CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in dangerous operation, personal injury, death or property damage.

Improper installation, adjustment, alteration, service, or maintenance can cause personal injury, property damage, or death. Consult a qualified installer, service agency,

or your local gas supplier for information or assistance. The qualified installer or service agency must use only factory-authorized replacement parts, kits, or accessories

when modifying this product.

WARNING

!

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Содержание 935SA

Страница 1: ...Valve Outlet Pressure for Gas Heat Values at Altitude 60 000 48 Table 24 Gas Valve Outlet Pressure for Gas Heat Values at Altitude 80 000 49 Table 25 Gas Valve Outlet Pressure for Gas Heat Values at Altitude 100 000 49 SERVICE AND MAINTENANCE PROCEDURES 50 WINTERIZATION 56 PARTS REPLACEMENT INFORMATION GUIDE 59 MODEL NOMENCLATURE 59 TRAINING 59 Most states in the USA and jurisdictions in Canada ha...

Страница 2: ...xterior 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 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...

Страница 3: ...roperty damage Improper installation adjustment alteration 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 service agency local gas supplier or your distributor or branch for information or assistance The qualified service agency must use only factory authorized...

Страница 4: ...ks 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 Always install furnace to operate within the furnace s intended temperature rise range with a duct system which has an external static pressure within the allowable range as specified in the Start Up Adjustments and Safety C...

Страница 5: ...one of the furnace model sizes can be used if the heating load is less than half of the furnace model s output capacity Use Air Conditioning Contractors of America Manual J and S American Society of Heating Refrigerating and Air Conditioning Engineers or other approved engineering method to calculate heating load estimates and select the furnace Excessive oversizing of the furnace may cause the fu...

Страница 6: ...In the state of Massachusetts This product must be installed by a licensed plumber or gas fitter When flexible connectors are used the maximum length shall not exceed 36 in 914 mm When lever type gas shutoffs are used they shall be T handle type The use of copper tubing for gas piping is not approved by the state of Massachusetts Electrical Connections US Current edition of National Electrical Cod...

Страница 7: ...ervicing and cleaning Always comply with minimum fire protection clearances Table 1 The following types of furnace installations may require OUTDOOR AIR for combustion due to chemical exposures Commercial buildings Buildings with indoor pools Laundry rooms Hobby or craft rooms Chemical storage areas If air is exposed to the following substances it should not be used for combustion air and outdoor ...

Страница 8: ...led in the space Spaces having less than 50 cubic feet per 1 000 BTUh 4 8 cubic meters per kW require the Outdoor Combustion Air Method Spaces having at least 50 cubic feet per 1 000 BTUh 4 8 cubic meters per kW may use the Indoor Combustion Air Standard or Known Air Infiltration Method Outdoor Combustion Air Method 1 Provide the space with sufficient air for proper combustion ventilation and dilu...

Страница 9: ...ace may be considered a space that freely communicates with the outdoors provided there are adequate 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 Combustion Air Method infiltration should be adequate to provide air for combustion permanent ventilation and ...

Страница 10: ...lation and Dilution Air from Outdoors AIR CHANGES PER HOUR ACH OTHER THAN FAN ASSISTED TOTAL 1 000 S BTUH GAS INPUT RATE FAN ASSISTED TOTAL 1 000 S BTUH GAS INPUT RATE 30 40 50 26 40 60 80 100 120 140 Space Volume Ft3 M3 0 60 1 050 29 7 1 400 39 6 1 750 49 5 910 25 8 1 400 39 6 1 500 42 5 2 000 56 6 2 500 70 8 3 000 84 9 3 500 99 1 0 50 1 260 35 6 1 680 47 5 2 100 59 4 1092 30 9 1 680 47 5 1 800 5...

Страница 11: ...An indoor coil condensate drain or humidifier drain can be connected to the external furnace condensate drain provided The drains are not hard piped together and There is an air gap at the point where the two drain lines meet or All condensate piping is at least 3 4 PVC and there is a relief tee at the top of condensate drain piping as shown see Fig 11 A200069 A200070 WARNING CARBON MONOXIDE POISO...

Страница 12: ...4 NOTE Coil may require metal spacer or shield between furnace and coil See coil install requirements Table 6 Fig 11 Example of Field Drain Attachment Table 5 Condensate Trap Configurations Part Installation Configuration Horizontal Upflow Upflow Offset Required Required Required Not Required Required Required Not Required Required Required Not Required Not Required Required accessory kit purchase...

Страница 13: ...ICE Upflow installations utilizing the right side air return opening should follow the Upflow Specific Steps Offset Installation to ensure the full opening is available for return ductwork CAUTION CUT HAZARD Failure to follow this caution may result in personal injury Sheet metal parts may have sharp edges or burrs Use care and wear appropriate protective clothing safety glasses and gloves when ha...

Страница 14: ...2 Screw the trap to the trap offset adapter see Fig 16 3 Screw the trap adapter plate to the casing using the supplied sheet metal screw see Fig 16 4 Remove factory installed collector box cap Run tube from port on upper left of the collector box to the relief port on the trap adapter Fig 19 If the tube is too long cut any extra length from the tube Horizontal Specific Steps 1 Accessory Horizontal...

Страница 15: ...machine screw see Fig 23 Drilling pilot holes is recommended to better align the plate with the knockout opening 4 Install the second trap plate at the remote location 5 ft or less away from the furnace Fig 23 5 Using two field supplied 1 2 in CPVC tubes of the desired length 5 ft or less and 2 field supplied CPVC elbows run the drain from the adapter plate on the furnace to the remote adapter pla...

Страница 16: ...lded should be treated as un shielded and require a spacer Dimensional requirements see Fig 26 3 For 3rd party unshielded coils consult manufacturer for design of a field fabricated shield that completely shields all plastic composite materials from direct exposure to any part of the heat exchanger All adapters are field fabricated according to the dimensions for the metal shield see Fig 25 and fo...

Страница 17: ...rnace must be pitched for proper condensate drainage see Fig 31 Supply Air Connections For a furnace not equipped with a cooling coil the outlet duct shall be provided with a removable access panel This opening shall be accessible when the furnace is installed and shall be of such a size that the heat exchanger can be viewed for possible openings using light assistance or a probe can be inserted f...

Страница 18: ...bottom closure panel to install leveling legs To remove bottom closure panel see Fig 34 To install leveling legs 1 Position furnace on its back Locate and drill a hole in each bottom corner of furnace 2 For each leg install nut on bolt and then install bolt with nut in hole Install flat washer if desired 3 Install another nut on other side of furnace base Install flat washer if desired 4 Adjust ou...

Страница 19: ... for return air connection A200088 Fig 32 Working Platform for Attic Installation NOTE Furnace shown is a direct vent application Refer to the venting section for allowable vent configurations NOTE N Coil only add 8 in separation between coil and furnace for all other unshielded coils See evaporator coil spacer or shield requirements NOTE Local codes may require a drain pan and condensate trap whe...

Страница 20: ...29 each opening used will require a filter A filter rack or any field supplied accessory air cleaner can also be installed in the common return duct prior to entering the return air opening in any orientation The furnace may be used with an optional external media filter cabinet The optional media filter cabinet uses either a standard 1 in 25 mm filter or 4 in 102 mm wide media filter which can be...

Страница 21: ...ring subbase not required 19 1 2 495 21 5 8 549 20 1 8 511 22 1 4 565 24 1 2 622 Upflow Applications on Combustible or Noncombustible Flooring subbase not required 23 584 21 1 8 537 23 5 8 600 22 1 4 565 16 x 25 Filter 406 x 635 mm Factory Accessory Washable Factory Accessory Media Representative After Market Filter Media Fiberglass Pleated CFM L s 1 in 2 5 cm 4 in 10 cm 1 in 2 5 cm 2 in 5 cm 1 in...

Страница 22: ...rn two side return or bottom and side return A minimum filter size of 20 x 25 508 x 635 mm is required 6 For upflow applications air entering from one side into both the side of the furnace and a return air base counts as a side and bottom return 7 The entry indicates an unstable operating condition NOTICE Many states provinces and localities are considering or have implemented standards and or re...

Страница 23: ...n made purge lines and check for leakage at furnace prior to operating furnace NOTE The furnace gas control valve inlet pressure tap connection is suitable to use as test gauge connection providing test pressure DOES NOT exceed maximum 0 5 psig 14 in w c stated on gas control valve see Fig 60 If pressure exceeds 0 5 psig 14 in w c gas supply pipe must be disconnected from furnace and capped before...

Страница 24: ... 4 19 360 250 200 170 151 1 25 680 465 375 320 285 1 1 4 32 1400 950 770 660 580 1 1 2 39 2100 1460 1180 990 900 LEFT SIDE GAS ENTRY GAS PIPE GROMMET REQUIRED FOR DIRECT VENT APPLICATONS GAS PIPE GROMMET REQUIRED FOR DIRECT VENT APPLICATIONS 1 1 2 inch for Gas 7 8 inch for 115 VAC Electric WARNING ELECTRICAL SHOCK FIRE OR EXPLOSION HAZARD Failure to follow safety warnings could result in dangerous...

Страница 25: ...ctions are made inside an external electrical box mounted external to the casing A190263 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 coil drain Alternate electric entry through top panel see Fig 36 1 Select and remove 7 8 in 22 mm knock out on the des...

Страница 26: ...the type of cord used 4 Pull furnace power wires through 1 2 in 12 mm diameter hole in J Box If necessary loosen power wires from strain 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 to furnace power leads see Fig 40 7 Attach furnace J Box cover to...

Страница 27: ...ce electronics or cause erratic operation Contact the alternate power supply manufacturer for specifications and details A190079 Fig 40 Typical Single Stage Wiring Diagram A190409 Fig 41 Example of Single Stage Furnace Control 115 V FIELD SUPPLIED DISCONNECT AUXILIARY J BOX 24 V TERMINAL BLOCK THREE WIRE HEATING ONLY FIVE WIRE NOTE 1 NOTE 2 FIELD SUPPLIED DISCONNECT CONDENSING UNIT TWO WIRE FURNAC...

Страница 28: ...ndards and American Society for Testing and Materials ASTM standards For approved materials for use in the U S A Table 16 This furnace is also CSA approved for venting with M G DuraVentRPolyProR or Centrotherm InnoFlueR polypropylene venting systems using single Table 13 Electrical Data FURNACE SIZE VOLTS HERTZ PHASE OPERATING VOLTAGE RANGE Permissible limits of the voltage range at which the unit...

Страница 29: ...Vent 2 Pipe system see Fig 54 and for Ventilated Combustion Air Non direct Vent 1 Pipe system see Fig 55 For exterior termination arrangements for Direct Vent 2 Pipe system see Fig 56 WARNING CARBON MONOXIDE POISONING HAZARD Failure to follow the instructions outlined below for each appliance being placed into operation could result in carbon monoxide poisoning or death For all venting configurati...

Страница 30: ...onal code authorities see Fig 54 Allowable vent and combustion air terminations see Fig 56 Ventilated Combustion Air The vent pipe for a Ventilated Combustion Air System must terminate outdoors For references to vent clearances required by National code authorities see Fig 55 Allowable vent terminations see Fig 57 The combustion air pipe terminates in a well ventilated attic or crawl space Follow ...

Страница 31: ...e connected to the tee or the External Vent Trap Kit to help prevent contaminants from entering the furnace see Fig 43 The External Vent Trap Kit accessory may be used as a trap for the combustion air inlet pipe if a large amount of moisture must be removed The drain line may be connected to the same drain as the furnace condensate and the evaporator coil condensate line ONLY if the inlet air trap...

Страница 32: ...lent Vent Length is still longer than the longer TEVL of the vent pipe or combustion air pipe then that diameter of pipe selected may be used When installing vent systems pipe lengths of 10 ft 3 M or less use the smallest allowable pipe diameter Using a pipe size greater than required for short venting systems may result in loss of efficiency incomplete combustion flame disturbance or flame sense ...

Страница 33: ...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 A13074 Fig 47 Vent Coupling and Adapter with Gaskets A210034 Fig 48 Inducer Vent Elbow Install the remaining vent and combustion air pipes as shown below It is recommended that all pipes be cut prepared and pre assembled before per...

Страница 34: ...ter 3 Remove the pipe from the furnace and the adapter and cut off any excess pipe 4 Clean and prime the end of the pipe that is flush with the vent adapter with a primer that is appropriate for the type of pipe being used 5 Re insert the pipe through the casing into the vent elbow 6 Tighten the clamp around the outlet of the vent elbow Torque the clamp to 15 lb in 7 Apply cement to the end of the...

Страница 35: ...tructions are provided as a reference only Determine an appropriate location for termination kit using the guidelines provided in section Locating The Vent Termination in this instruction 1 Cut one 4 in diameter hole for 2 in kit or one 5 in diameter hole for 3 in kit 2 Loosely assemble concentric vent combustion air termination components together using instructions in kit 3 Slide assembled kit w...

Страница 36: ...ntative drawing only some models may vary HORIZONAL LEFT LEFT VENT CONFIGURATION A11329A Representative drawing only some models may vary HORIZONTAL LEFT RIGHT VENT CONFIGURATION Fig 51 Horizontal Left Appearance may vary See Notes for Venting Options A11337 Representative drawing only some models may vary HORIZONTAL RIGHT VERTICAL VENT CONFIGURATION 1 2 3 4 5 6 7 5 Rotate vent elbow to required p...

Страница 37: ...See Table below for approved materials for use in the U S A 3 UL 1738 vent systems must be composed of pipe fittings cements and primers from the same supplier Material Description Type ASTM ULC UL Specification Pipe Fittings Solvents Primers Cements PVC Pressure Pipe Schedule 40 D1785 UL 1738 D2466 or D2665 F656 D2564 DWV Schedule 40 D1785 D2665 SDR 26 N A D2241 SDR 21 N A D2241 IPEX Schedule 40 ...

Страница 38: ... 20 30 25 15 15 10 10 20 40 30 25 20 45 40 30 20 5 20 15 10 20 20 15 10 5 20 25 20 15 20 30 25 20 40 15 10 5 15 15 10 5 20 15 15 10 20 20 15 10 Unit Size 80 000 BTUH Winter Design Temp F Pipe Dia in Uninsulated 3 8 in Insulation 1 2 in Insulation 1 2 2 3 4 1 2 2 3 4 1 2 2 3 4 20 15 40 40 35 30 15 50 90 75 65 15 50 70 70 70 0 15 20 15 10 5 15 50 45 35 30 15 50 50 40 35 20 15 10 5 15 35 30 20 15 15 ...

Страница 39: ...0 ft 22 M Use length of the longer of the vent or air inlet piping system Add equiv length of 3 90º long radius elbows use the highest number of elbows for either the vent or inlet pipe 3 x 3 ft 0 9 M 9 ft 2 7 M From Table 19 Add equiv length of 2 45º long radius elbows use the highest number of elbows for either the vent or inlet pipe 2 x 1 5 ft 0 5 M 3 ft 0 9 M From Table 19 Add equiv length of ...

Страница 40: ...stances when vent termination is located more than 6 ft 2 M away from an inside corner refer to the appropriate Direct Vent or Non Direct Vent Clearance Table Clearance description when termination is at least 3 ft 1 M away and not more than 6 ft 2 M away from an inside corner Clearance above grade veranda porch deck balcony or anticipated snow level 12 in 305 mm Clearance to a permanently closed ...

Страница 41: ...ply 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 Permitted only if veranda porch deck or balcony is fully open on a minimum 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 o...

Страница 42: ...ote 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 veranda porch deck or balcony 12 in 305 mm Permitted only if veranda porch deck or balcony is fully open on a minimum 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 ...

Страница 43: ...72mm 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 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 ...

Страница 44: ...Pour one quart liter of water into funnel tube Water should run through collector box overfill condensate trap and flow into open field drain 7 Remove funnel and tube from collector box and replace collector box drain plug A190304 Fig 59 Prime Condensate Trap WARNING FIRE HAZARD Failure to follow this warning could result in personal injury death and or property damage This furnace is equipped wit...

Страница 45: ...s supply manual shutoff valve to OFF position l Turn off furnace power supply m Remove manometer from the inlet pressure tap of the gas valve n Tighten set screw on inlet tower pressure tap with 3 32 in hex wrench or if 1 8 in NPT plug was removed apply pipe dope sparingly to end of plug and re install in the gas valve 2 4 Adjust gas valve outlet pressure determined in Step 2 to obtain correct inp...

Страница 46: ...2 Return and supply ducts for excessive restrictions causing static pressures greater than the maximum heating static listed on the rating plate c Adjust air temperature rise by adjusting blower speed Increase blower speed to reduce temperature rise Decrease blower speed to increase temperature rise d Turn thermostat down below room temperature and remove blower access door e To change motor speed...

Страница 47: ... Main or upper door in upflow position doors are properly installed 5 Verify that the Status LED glows If not check that the power supply is energized and that the blower door is secure Interpret diagnostic codes see Fig 63 6 Cycle test furnace with room thermostat to be sure that it operates properly with the room thermostat Check all modes including Heat Cool and Fan 7 Check operation of accesso...

Страница 48: ... 2 2 2 3 2 3 2 4 2 5 875 2 0 2 1 2 1 2 2 2 3 2 3 900 1 9 2 0 2 0 2 1 2 1 2 2 5400 925 1 8 1 8 1 9 2 0 2 0 2 1 1646 950 1 8 1 8 1 8 1 9 1 9 2 0 975 1 8 1 8 1 8 1 8 1 8 1 9 1000 1 8 1 8 1 8 1 8 1 8 1 8 Table 23 Gas Valve Outlet Pressure for Gas Heat Values at Altitude 60 000 Tabulated Data Based on 60 000 BTUH Input for 0 ft 0m to 5400 ft 1646 M above sea level ALTITUDE RANGE ft m AVG GAS HEAT VALUE...

Страница 49: ...2 2 2 2 2 3 2 4 2 4 875 2 0 2 0 2 1 2 2 2 2 2 3 900 1 9 1 9 2 0 2 0 2 1 2 2 5400 925 1 8 1 8 1 9 1 9 2 0 2 1 1646 950 1 8 1 8 1 8 1 8 1 9 2 0 975 1 8 1 8 1 8 1 8 1 8 1 9 1000 1 8 1 8 1 8 1 8 1 8 1 8 Table 25 Gas Valve Outlet Pressure for Gas Heat Values at Altitude 100 000 Tabulated Data Based on 100 000 BTUH Input for 0 ft 0m to 5400 ft 1646 M above sea level ALTITUDE RANGE ft m AVG GAS HEAT VALU...

Страница 50: ...interrupted 1 To retrieve status code proceed with the following NOTE NO thermostat signal may be present at control and all blower OFF delays must be completed a Remove blower access door b Close blower door interlock switch c Using a length of wire briefly short the TEST TWIN terminal to the C terminal on the furnace control 2 When above items have been completed the LED flashes the most recent ...

Страница 51: ...et lockout Check for Blocked burner inlet Blocked burner mesh 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 motor Inadequate combustion air supply Defective pressure transducer Low inlet gas pressure if LGPS used Low inducer voltage 115 VAC Frozen or...

Страница 52: ...d motor 7 If a greasy residue is present on blower wheel remove wheel from the blower housing and wash it with an appropriate degreaser To remove wheel NOTE Before disassembly mark blower motor and blower housing so motor and each arm is positioned at the same location during reassembly a Disconnect ground wire attached to blower housing b Remove screws securing cutoff plate and remove cutoff plat...

Страница 53: ...ch is closed Exercise caution to avoid electrical shock from exposed electrical components when manually closing this switch for service purposes SET SCREW MOTOR WHEEL HUB MOTOR SHAFT FLAT 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 ...

Страница 54: ... If damaged or missing replace gasket before reinstalling 6 To replace igniter and bracket assembly reverse items 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 66 8 Turn on gas and electrical supplies to furnace 9 Verify igniter operation by initiating control board self test feature Run the furnace t...

Страница 55: ...at exchangers should be replaced rather than trying to clean them thoroughly due to their intricate design A build up 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 excha...

Страница 56: ...as well the inducer will operate during the 90s If the BTS does not reset during this time a permanent lockout will result and power must be cycled to reset Check BTS and fault code 26 for more information The blower door must be installed for power to be conducted through the blower door interlock switch ILK to the furnace control CPU transformer TRAN inducer motor IDM blower motor BLWM hot surfa...

Страница 57: ...gized as long as the blower motor BLWM is energized During a call for heat the furnace control CPU will transition the blower motor BLWM to FAN tap The blower motor BLWM will remain ON until the main burners ignite then shut OFF and remain OFF for 25 seconds before coming back on at HEAT tap The blower motor BLWM will revert to FAN tap after the heating cycle blower off delay is completed When the...

Страница 58: ...0 150 or 180 seconds cooling or heat pump 90 seconds 12 BLWM is locked rotor overload protected by redundant electronic control circuits 13 J15 and J16 not available on all motors Blower motor BLWM leads may be hardwired at motor 14 Some motors may use black instead of gray for COOL motor tap Hi Speed 15 Inductor not used on all models PL3 PTD PL12 R G BK 2 3 1 BL NOTE 3 GV R Y R LS PL1 W 1 1 2 3 ...

Страница 59: ...ion of Carrier Corporation 7310 West Morris Street Indianapolis IN 46231 U S A Have available the model number series number and serial number located on the unit rating plate to ensure correct replacement part MODEL NOMENCLATURE TRAINING My Learning Center is your central location for professional residential HVAC training resources that help strengthen careers and businesses We believe in provid...

Страница 60: ...Date 03 22 Catalog No II935SA 05 REV B Replaces II935SA 05 REV A 935SA Installation Start up Operating and Service Maintenance Instructions Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 60 ...

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