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915SA

SINGLE STAGE 4--WAY MULTIPOISE

CONDENSING GAS FURNACE

SERIES A AND B

Installation, Start--up, Operating and

Service and Maintenance Instructions

NOTE

: Read the entire instruction manual before starting the installation.

SECTIONS

SAFETY CONSIDERATIONS

3

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INTRODUCTION

4

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CODES AND STANDARDS

4

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ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS

5

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ACCESSORIES

5

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LOCATION

8

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AIR FOR COMBUSTION AND VENTILATION

9

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CONDENSATE TRAP

12

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CONDENSATE DRAIN

16

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INSTALLATION

20

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AIR DUCTS

29

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GAS PIPING

31

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ELECTRICAL CONNECTIONS

32

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VENTING

37

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START--UP, ADJUSTMENT, AND SAFETY CHECK

61

. . . . . .

SERVICE AND MAINTENANCE PROCEDURES

73

. . . . . . . .

SEQUENCE OF OPERATION

81

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PARTS REPLACEMENT GUIDE

85

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CERTIFIED

Use of the AHRI Certified 

TM 

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 current edition of

NFPA 54/ANSI Z223.1

E

, 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.

TABLES

LOOSE PARTS BAG

5

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MIN. CLEARANCES TO COMBUSTIBLE MATERIALS

5

. . .

MINIMUM FREE AREA REQUIRED

11

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MINIMUM SPACE VOLUMES

11

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FILTER SIZE INFORMATION

23

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OPENING DIMENSIONS

25

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AIR DELIVERY CFM

30

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MAXIMUM CAPACITY OF PIPE

32

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ELECTRICAL DATA

34

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VENT TERM. KIT FOR DIRECT VENT (2--PIPE) SYSTEMS 39
Combustion--Air Vent Pipe, Fitting & Cement Material..

45

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Maximum Allowable Exposed Vent Lengths Insulation

46

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Maximum Equivalent Vent Length

47

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Deductions from Maximum Equivalent Vent Length

47

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Blower Off Delay Setup Switch

64

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Altitude Derate Multiplier for U.S.A.

65

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Gas Rate

68

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Orifice Size and Manifold Pressure

68

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Содержание 24026

Страница 1: ...to www ahridirectory org Portions of the text and tables are reprinted from current edition of NFPA 54 ANSI Z223 1E with permission of National Fire Protection Association Quincy MA 02269 and America...

Страница 2: ...aust 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...

Страница 3: ...gs and on labels attached to or shipped with furnace and other safety precautions that may apply These instructions cover minimum requirements and conform to existing national standards and safety cod...

Страница 4: ...reliability of heat exchangers motors and controls See Fig 3 The furnace should be sized to provide 100 percent of the design heating load requirement plus any margin that occurs because of furnace mo...

Страница 5: ...rge your body with static electricity for example DO NOT move or shuffle your feet do not touch ungrounded objects etc 4 If you touch ungrounded objects and recharge your body with static electricity...

Страница 6: ...5 30040 14 3 16 361 12 1 2 319 12 9 16 322 7 1 8 181 123 0 55 9 30060 127 0 57 7 36040 17 1 2 445 15 7 8 403 16 406 8 3 4 222 134 0 60 9 42060 144 0 65 4 48080 154 0 70 0 60080 21 533 19 3 8 492 19 1...

Страница 7: ...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 SEE PRODUCT DATA FOR ACCESSORY CONDENSATE T...

Страница 8: ...em Refer to Air Ducts section S be provided ample space for servicing and cleaning Always comply with minimum fire protection clearances shown in Table 2 or on the furnace clearance to combustible con...

Страница 9: ...e combustion ventilation and dilution air must be provided in accordance with S U S A Installations Current edition of Section 9 3 of the NFPA 54 ANSI Z223 1 Air for Combustion and Ventilation and app...

Страница 10: ...ms can be considered part of a space if a There are no closeable doors between rooms b Combining spaces on same floor level Each opening shall havefreeareaofat least1 in 2 1 000Btuh 2 000mm2 kW of the...

Страница 11: ...Volumes for 100 Combustion Ventilation 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...

Страница 12: ...10 and 11 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 b...

Страница 13: ...ports of the 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 Connect the new pressu...

Страница 14: ...on Attach condensate trap with screw to 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 tra...

Страница 15: ...osition and torque clamp on inlet 15 lb in Slide relief tube in stand offs to adjust length Attach condensate trap with screw to collector box Align trap over middle and right hand port on collector b...

Страница 16: ...piped together and b There is an air gap at the point where the two drain lines meet or c All condensate piping is at least 3 4 in PVC and there is a relief tee at the top of condensate drain piping...

Страница 17: ...n trap grommet is ONLY REQUIRED FOR DIRECT VENT APPLICATIONS It is NOT required for applications using single pipe or ventilated combustion air venting NOTICE TIP FROM CONTRACTORS When installing the...

Страница 18: ...e DIRECTION OF AIRFLOW Condensing Furnace Evaporator Coil Blower 3 4 PVC 1 2 3 4 1 2 CPVC or larger Positive pressure Pressure lower than areas with Negative pressure 3 4 PVC DIRECTION OF AIRFLOW 1 2...

Страница 19: ...ing Furnace Evaporator Coil Blower 3 4 PVC 3 4 1 2 CPVC or larger Positive pressure Pressure lower than areas with Negative pressure 3 4 PVC DIRECTION OF AIRFLOW 3 4 3 4 3 4 3 4 Open standpipe Optiona...

Страница 20: ...IPE ORIENTATION FOR CONDENSATE DISCHARGE A170128 Fig 18 Drain Trap Connection and Routing Appearance may vary INSTALLATION Cabinet air leakage is less than 2 at 1 0 in W C Cabinet air leakage is less...

Страница 21: ...KC 1 Determine application being installed from Table 8 2 Construct hole in floor per Table 8 and Fig 21 3 Construct plenum to dimensions specified in Table 8 and Fig 21 4 Install special base coil as...

Страница 22: ...ottom Return Air Inlet These furnaces are shipped with bottom closure panel installed in bottom return air opening Remove and discard this panel when bottom return air is used To remove bottom closure...

Страница 23: ...05 13 0 07 18 0 08 21 0 13 32 0 29 72 0 20 49 1000 472 0 06 16 0 11 28 0 11 28 0 17 43 0 27 67 1200 566 0 07 18 0 15 37 0 14 36 0 22 56 1400 661 0 08 21 0 19 48 0 18 45 0 28 70 1600 755 0 09 23 0 24...

Страница 24: ...RETURN BOTTOM RETURN 14 3 16 360 16 x 25 x 3 4 406 x 635 x 19 14 x 25 x 3 4 356 x 635 x 19 Washable 17 1 2 445 16 x 25 x 3 4 406 x 635 x 19 16 x 25 x 3 4 406 x 635 x 19 Washable 21 533 16 x 25 x 3 4...

Страница 25: ...2 419 19 5 8 498 Downflow applications on combustible flooring KGASB sub base required 15 1 8 384 19 483 16 3 4 425 20 5 8 600 Downflow Applications on Combustible Flooring with CNPV CNRV CAR or CAP C...

Страница 26: ...CLOSURE Representative drawing only some models may vary in appearance A170123 Fig 23 Removing Bottom Closure Panel 2 Screws BOTTOM PLATE SCREWS 4 1 Lay furnace on the back or side 2 Remove the four 4...

Страница 27: ...TAL MIN 1 4 IN 6 MM TO 1 2 IN 13 MM MAX A11237 Fig 26 Furnace Pitch Requirements ANY COMBINATION OF 1 2 OR 3 PERMITTED A11036 Fig 27 Upflow Return Air Configurations and Restrictions A11037 Fig 28 Dow...

Страница 28: ...ished ceiling 2 IN 51 mm COMBUSTION AIR PIPE SEE VENTING SECTION Install 12 x 22 204 x 559 mm sheet metal in front of and above the burner compartment area The sheet metal MUST extend above the furnac...

Страница 29: ...ctions 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 uncondition...

Страница 30: ...180 1130 1075 1020 960 885 800 Red 5 1085 1045 1010 960 915 865 805 740 665 595 060100 BOTTOM or TWO SIDES 3 4 Black 2415 2330 2245 2155 2065 1965 1865 1760 1645 1530 Yellow 2130 2075 2010 1945 1865 1...

Страница 31: ...e a 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...

Страница 32: ...econnect wires correctly Verify proper operation after servicing Always reinstall access doors after completing service and maintenance WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning c...

Страница 33: ...external electrical box mounted external to the casing External Electrical Box on Furnace Casing NOTE Check to ensure that external electrical box does not interfere with duct work gas piping or the...

Страница 34: ...use ONLY a 3 amp fuse of identical size See Fig 39 Accessories See Fig 37 and 39 1 Electronic Air Cleaner EAC Connect an accessory Electronic Air Cleaner if used using 1 4 in female quick connect ter...

Страница 35: ...LINE VOLTAGE A11146 Fig 36 Field Supplied External Electrical Box on Furnace Casing 24 V Coil To Humidifier Leads To Com 24V Screw Terminal on Thermostat Strip To HUM Terminal On Furnace Control Boar...

Страница 36: ...t wire W Y GND THERMOSTAT TERMINALS 1 2 3 A02174 Fig 38 Typical Single Stage Wiring Diagram BLW NUETRAL STATUS CODE LED SEC 2 SEC 1 EAC 2 L2 FUSE 3 AMP 0 5 AMP 24VAC HUM TEST TWIN G Com W Y R 24V 120...

Страница 37: ...used with this system must be UL listed material Acceptability under Canadian standard CAN CSA B149 is dependent upon full compliance with all installation instructions Under this standard it is recom...

Страница 38: ...ipe system or Fig 54 for single pipe or 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 appliance...

Страница 39: ...for a single pipe vent system A 12 in 304 mm long pipe with a 2 in 51 mm tight radius 90 degree elbow is required to be attached to the combustion air pipe adapter on the furnace See Fig 51 This short...

Страница 40: ...aces that use ventilation fans designed to operate in the heating season If ventilation fans are present in these areas the combustion air pipe must terminate outdoors as a Direct Vent System Non Dire...

Страница 41: ...ent terminations or pipe lengths and elbows used for standard vent terminations do not require a deduction from the Maximum Equivalent Vent Length See vent termination figures associated with Table 16...

Страница 42: ...lbow to the required position There are rounded notches on the vent elbow to align it with the inducer housing for each orientation 3 Tighten the clamp around the vent elbow Torque the clamp to 15 lb...

Страница 43: ...ping hangers as shown in Table 13 Support pipes using perforated metal hanging strap or commercially available hangers or straps designed to support plastic pipe 17 Slope the vent and combustion air p...

Страница 44: ...tions of the vent terminal manufacturer These instructions are provided as a reference only Cut one 4 in 102 mm diameter hole for 2 in 50 mm ND kit or one 5 in 127 mm diameter hole for 3 in 80 mm ND k...

Страница 45: ...ictor in place 4 Re install the vent elbow 5 Torque vent elbow clamp 15 lb in Table 14 Approved Combustion Air and Vent Pipe Fitting and Cement Materials U S A Installations MATERIALS USA 1 All pipe f...

Страница 46: ...51 38 51 7 6 1 6 1 15 2 13 7 18 3 15 2 18 1 5 1 5 7 6 6 1 9 1 7 6 29 4 6 3 0 6 1 4 6 40 3 0 1 5 4 6 3 0 Unit Size 40 000 BTUH 60 000 BTUH Winter Design Temp C Pipe Dia mm Uninsulated 3 8 in Insulatio...

Страница 47: ...NA 16 7 38 1 41 1 14 0 39 6 7 6 13 7 2439 2743 10 6 33 5 27 4 28 9 1 5 18 2 35 0 38 1 10 0 24 3 33 5 35 0 15 2 35 0 38 1 13 1 36 5 4 5 9 1 2744 3048 9 1 28 9 1 5 24 3 25 9 NA 16 7 32 0 35 0 9 1 22 8...

Страница 48: ...EVL 95 ft 29 M For 2 pipe from Table 16 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 640M Venting system includes FOR EACH P...

Страница 49: ...THE INDUCER FOR USAGE SEE MAXIMUM EQUIVALENT VENT LENGTH TABLE 10FT 3 1 M OF VENT OR LESS ONLY A170006 Fig 41 Inducer Vent Elbow Avoid short horizontal offsets with 90 deg Elbows Short offsets can be...

Страница 50: ...items refer to the Inside Corner Clearance Table 3 ft 1 M to 6 ft 2 M Notes For this illustration Wall A is the wall adjacent to the wall the vent termination is located Wall B is the wall the vent te...

Страница 51: ...he vent termination within a horizontal distance of 2 ft 61 cm from the centerline of the vent termination 6 ft 2 M Clearance to a ventilation exhaust including HRV ERV on either Wall A or Wall B 12 i...

Страница 52: ...combustion air connection UPFLOW VERTICAL VENT A11310A Fig 45 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 L...

Страница 53: ...T RIGHT VENT CONFIGURATION A11329A Fig 47 Horizontal Left Appearance may vary See Notes for Venting Options ALTERNATE COMBUSTION AIR CONNECTIONS HORIZONTAL RIGHT VERTICAL VENT CONFIGURATION A11337 Req...

Страница 54: ...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...

Страница 55: ...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 dr...

Страница 56: ...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...

Страница 57: ...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 great...

Страница 58: ...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 CLEAR...

Страница 59: ...ipe hangar Ventilated Combustion Air intake termination in crawl space Ventilated Combustion Air intake pipe CRAWL SPACE ATTIC highest level of insulation A10497 Fig 56 Vent Terminations for Ventilate...

Страница 60: ...some models may vary in appearance TO CODE APPROVED DRAIN OR CONDENSATE PUMP Tee Dry Well Cap water tight and removable Tee Dry Well Cap water tight and removable Tee Dry Well Cap water tight and remo...

Страница 61: ...r operates HUM 24vac terminal is only energized when the draft inducer is energized in heating Prime Condensate Trap with Water CARBON MONOXIDE POISONING HAZARD Failure to follow these warnings could...

Страница 62: ...duced by 5 percent for altitudes of 2000 ft 609 6M to 4500 ft 1371 6M above sea level The natural gas manifold pressures in Table 21 adjust for BOTH altitude and natural gas heating value NOTE For Can...

Страница 63: ...120 000 BTUH models DO NOT set manifold pressure less than 2 8 in w c 697 Pa or more than 3 8 in w c 947 Pa for natural gas If required manifold pressure is outside this range change main burner orifi...

Страница 64: ...rom one of the other motor leads and relocate it them to HEAT heating blower tap terminal s Reconnect original lead on SPARE terminal Adjust Blower Off Delay Heat Mode If desired the main blower off t...

Страница 65: ...If there is a jumper connector plugged into PLT remove it and discard See Fig 39 3 Verify that the Blower Heat Off Delay jumpers are set as desired See Fig 39 and 71 4 Verify that the blower lower do...

Страница 66: ...TP INP VENT 1 2 NPT INLET INLET PRESSURE TAP SET SCREW 3 32 HEX HEAD ACCEPTS 5 16 HOSE CONNECTION Representative drawing only some models may vary in appearance A170118 Standard Capacity Gas Valve wit...

Страница 67: ...67 338309 201 Rev E A11602 Fig 62 Service Label Information 915SA...

Страница 68: ...80 45 90 225 26 138 277 692 82 44 88 220 27 133 267 667 84 43 86 214 28 129 257 643 86 42 84 209 29 124 248 621 88 41 82 205 30 120 240 600 90 40 80 200 31 116 232 581 92 39 78 196 32 113 225 563 94...

Страница 69: ...825 43 3 6 43 3 7 43 3 8 42 3 2 850 44 3 8 43 3 5 43 3 6 43 3 7 875 44 3 6 44 3 7 43 3 4 43 3 5 4000 900 44 3 4 44 3 5 44 3 7 44 3 8 1219 925 44 3 2 44 3 4 44 3 5 44 3 6 950 44 3 1 44 3 2 44 3 3 44 3...

Страница 70: ...3 3 7 43 3 8 42 3 2 725 44 3 8 43 3 4 43 3 5 43 3 6 750 44 3 5 44 3 7 44 3 8 43 3 4 8000 775 44 3 3 44 3 4 44 3 5 44 3 7 2438 800 44 3 1 44 3 2 44 3 3 44 3 4 825 44 2 9 44 3 0 44 3 1 44 3 2 625 42 3 4...

Страница 71: ...4 1 5 44 1 6 4000 925 44 1 4 44 1 4 44 1 5 44 1 5 1219 950 44 1 3 44 1 3 44 1 4 44 1 4 750 43 1 7 43 1 7 43 1 8 43 1 8 775 44 1 8 43 1 6 43 1 7 43 1 7 4001 800 44 1 7 44 1 7 44 1 8 43 1 6 1220 825 44...

Страница 72: ...8 2439 675 44 1 7 44 1 8 44 1 8 43 1 6 700 44 1 6 44 1 6 44 1 7 44 1 7 725 44 1 5 44 1 5 44 1 6 44 1 6 9000 750 44 1 4 44 1 4 44 1 5 44 1 5 2743 775 44 1 3 44 1 3 44 1 4 44 1 4 9001 600 43 1 7 43 1 8...

Страница 73: ...inimum break point of the switch is 0 63 in W C The maximum break point of the switch is 0 73 in W C The maximum make point of the switch is 0 83 in W C ELECTRICAL SHOCK HAZARD Failure to follow this...

Страница 74: ...ce restarts by raising thermostat setting above room temperature Checklist 1 Put away tools and instruments Clean up debris 2 Verify that the jumper is removed from the TEST TWIN terminal Verify that...

Страница 75: ...posite direction of airflow Rinse filter and let dry Oiling or coating of the filter is not recommended 5 If equipped with factory specified disposable media filter replace only with a factory specifi...

Страница 76: ...ice technician If the burners develop an accumulation of light dirt or dust they may be cleaned by using the following procedure NOTE Use a back up wrench on the gas valve to prevent the valve from ro...

Страница 77: ...lies to furnace 9 Verify igniter operation by initiating control board self test feature or by cycling thermostat 10 Replace control door Flushing Collector Box and Drainage System ELECTRICAL SHOCK AN...

Страница 78: ...lean 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 insufficie...

Страница 79: ...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 co...

Страница 80: ...ROMMET 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 A115...

Страница 81: ...y If the burner flame is proven the blower motor is energized on HEAT speed 25 sec after the gas valve GV is energized Simultaneously the electronic air cleaner terminal EAC 1 is energized and remains...

Страница 82: ...ious fault or status code 11 1 short and 1 long flash if there was no previous fault After the control repeats the code 4 times the control will go through a brief component test sequence The inducer...

Страница 83: ...sequence 3 more times 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 pr...

Страница 84: ...84 A12420 Fig 71 Wiring Diagram 915SA...

Страница 85: ...ified section of your local telephone directory under Heating Equipment or Air Conditioning Contractors and Systems headings for dealer listing by brand name or contact Have available the model number...

Страница 86: ...ue or change at any time specifications or designs without notice and without incurring obligations E2018 Bryant Heating Cooling Systems D 7310 W Morris St D Indianapolis IN 46231 Edition Date 11 18 R...

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