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Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and
air-conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered
equipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in the
literature and on the tags, stickers, and labels that are attached to the equipment.

August 2019

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Upflow/Horizontal and Downflow
Gas-Fired, Direct/Non-Direct Vent, Single Stage
Condensing Furnaces with High Efficiency Motor

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A951X040BU3SAA
A951X060BU4SAA
A951X080BU4SAA
A951X080CU5SAA
A951X100CU5SAA
A951X120DU5SAA

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A951X040BD3SAA
A951X060BD3SAA
A951X080BD4SAA
A951X100CD5SAA
A951X120DD5SAA

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e:: Graphics in this document are for representation

only. Actual model may differ in appearance.

CAUTION

!

COIL REQUIREMENT! 

Failure to follow this Caution could result in property damage or personal injury. 4GXC* and 

4MXC* coils installed on upflow furnaces in vertical, horizontal left, or horizontal right 

orientations without a factory installed metal drain pan shield must use a MAY*FERCOLKITAA 

kit. Coils installed on upflow furnaces must have drain pans that are suitable for 400° F 

(205°C) or have a metal drain pan shield. Downflow furnaces do not require a metal drain pan 

shield or the use of the MAY*FERCOLKITAA kit. See Installer’s Guide for more information.

Installer’s Guide

Summary of Contents for A951X040BD3SAA

Page 1: ...i iz zo on nt ta al l R Ri ig gh ht t o or r H Ho or ri iz zo on nt ta al l L Le ef ft t A951X040BU3SAA A951X060BU4SAA A951X080BU4SAA A951X080CU5SAA A951X100CU5SAA A951X120DU5SAA D Do ow wn nf fl lo o...

Page 2: ...ea at th h o or r p pr ro op pe er rt ty y d da am ma ag ge e N Ne ev ve er r t te es st t f fo or r g ga as s l le ea ak ks s w wi it th h a an n o op pe en n f fl la am me e U Us se e a a c co om mm...

Page 3: ...e el l l lo oo op p b by y a an ny y p pe er rm ma an ne en nt t m me ea an ns s W WA AR RN NI IN NG G E EL LE EC CT TR RI IC CA AL L S SH HO OC CK K H HA AZ ZA AR RD D F Fa ai il lu ur re e t to o f...

Page 4: ...n p pr ro op pe er rt ty y d da am ma ag ge e s se ev ve er re e p pe er rs so on na al l i in nj ju ur ry y o or r d de ea at th h D Do o n no ot t i in ns st ta al ll l t th he e f fi il lt te er r...

Page 5: ...E EE EZ ZE E C CA AU UT TI IO ON N F Fa ai il lu ur re e t to o f fo ol ll lo ow w t th hi is s C Ca au ut ti io on n c co ou ul ld d r re es su ul lt t i in n p pr ro op pe er rt ty y d da am ma ag g...

Page 6: ...l p pi it tc ch h a as s r re eq qu ui ir re ed d i in n t th he e N Na at ti io on na al l F Fu ue el l G Ga as s C Co od de e A AN NS SI I Z Z2 22 23 3 1 1 N NF FP PA A 5 54 4 o or r t th he e C CS...

Page 7: ...s se ea al le ed d T Th he e 9 90 0 e el lb bo ow w c co on nn ne ec ct ti io on n t to o v ve er rt ti ic ca al l p pi ip pe e m mu us st t b be e s se ea al le ed d t to o p pr re ev ve en nt t c co...

Page 8: ...ctions 59 Field Wiring 59 Twinning 60 Condensate Drain Instructions 61 61 Vertical Applications 62 Horizontal Applications 66 General Start up and Adjustment 67 Preliminary Inspections 67 Lighting Ins...

Page 9: ...ion C Cabinet Upflow Furnaces BAYLIFTD Dual Return Kit D size extension D Cabinet Upflow Furnaces BAYBASE205 Downflow Subbase All Downflow Furnaces BAYFLTR206 Filter Access Door Kit Downflow only All...

Page 10: ...ef ft t A951X040BU3SAA A951X060BU4SAA A951X080BU4SAA A951X080CU5SAA A951X100CU5SAA A951X120DU5SAA D Do ow wn nf fl lo ow w O On nl ly y A951X040BD3SAA A951X060BD3SAA A951X080BD4SAA A951X100CD4SAA A95...

Page 11: ...letion of the construction process and verify Furnace operating conditions including ignition input rate temperature rise and venting according to the manufacturer s instructions 10 I In n t th he e C...

Page 12: ...s of clearance between the furnace combustion air openings in the front panel and any closed panel or door provided 5 Are the ventilation and combustion air openings large enough and will they remain...

Page 13: ...88 A951X001 1B EN 13 Outline Drawings Upflow Furnace B Size Cabinet...

Page 14: ...14 88 A951X001 1B EN Upflow Furnace C Size Cabinet O Ou ut tl li in ne e D Dr ra aw wi in ng gs s...

Page 15: ...88 A951X001 1B EN 15 Upflow Furnace D Size Cabinet O Ou ut tl li in ne e D Dr ra aw wi in ng gs s...

Page 16: ...16 88 A951X001 1B EN Downflow Furnace B Size Cabinet O Ou ut tl li in ne e D Dr ra aw wi in ng gs s...

Page 17: ...88 A951X001 1B EN 17 Downflow Furnace C Size Cabinet O Ou ut tl li in ne e D Dr ra aw wi in ng gs s...

Page 18: ...18 88 A951X001 1B EN Downflow Furnace D Size Cabinet O Ou ut tl li in ne e D Dr ra aw wi in ng gs s...

Page 19: ...ists studs or framing The furnace may be placed horizontally in a crawl space on a pad or other noncombustible material which will raise the unit for sufficient protection from moisture The Furnace mu...

Page 20: ...as Line Grommet 1 8 NPT Test Fitting Upflow furnace with gas piping on right side Automatic Gas Valve with Manual Shut off Main Manual Shut off Valve Ground Union Joint Drip Leg Gas Line Grommet 1 8 N...

Page 21: ...1 8 NPT Test Fitting Horizontal left furnace with gas piping out right side Automatic Gas Valve with Manual Shut off Main Manual Shut off Valve Ground Union Joint Drip Leg Gas Line Grommet 1 8 NPT Te...

Page 22: ...sing its individual manual shut off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1 2 psig 3 5 kPa Note Maximum pressure to the gas valve fo...

Page 23: ...utility company and compare to the nameplate rating This must not exceed the nameplate rating Gas Flow in Cubic Feet Per Hour 2 Cubic Foot Dial Sec Flow Sec Flow Sec Flow Sec Flow 10 732 31 236 52 14...

Page 24: ...ator until pressure shown on manometer matches the pressure specified in the table The input of no more than nameplate rating and no less than 93 of the nameplate rating unless the unit is derated for...

Page 25: ...UMBER 44 ORF00501 54 ORF00555 45 ORF00644 55 ORF00693 46 ORF00909 56 ORF00907 47 ORF00910 57 ORF00908 48 ORF01099 58 ORF01338 49 ORF00503 59 ORF01339 50 ORF00493 Turn the main Gas Valve toggle switch...

Page 26: ...tem must not be interchanged with other vent systems or unlisted pipe or fittings Plastic components specified primers and glues must be from a single system manufacturer and not intermixed with other...

Page 27: ...t may occur will now drain outside of the home The combustion air outlet piping must remain sloped back to the furnace Option 1 Slope equals 1 4 per foot To an approved vented drain Combustion air int...

Page 28: ...Tee Combustion air intake Combustion air exhaust Primary drain vent stack must terminate below the bottom of the condensate trap Option 3 Side combustion air intake If sloping the combustion air inta...

Page 29: ...te If only the flue gas pipe is to the outside of the structure a straight section of pipe long enough to exit the Furnace cabinet must be attached to the inlet air side with an elbow which is 5 to 10...

Page 30: ...le en ne e v ve en nt ti in ng g s sy ys st te em ms s F Fo ol ll lo ow w t th he e m ma an nu uf fa ac ct tu ur re er r s s i in ns st ta al ll la at ti io on n i in ns st tr ru uc ct ti io on ns s...

Page 31: ...M D2241 CPVC ASTM STANDARD PIPE TYPE ALLOWABLE TEMPERATURE F MARKING D2846 CPVC 41 212 ASTM D2846 F441 SCH 40 80 212 ASTM F441 F442 SDR SERIES 212 ASTM F442 ABS ASTM STANDARD PIPE TYPE ALLOWABLE TEMPE...

Page 32: ...erent from what is shown in Note 6 Refer to the venting system manufacturer s installation instruction for appropriate venting diameters and equivalent lengths 3 Minimum vent length for all models 15...

Page 33: ...cing coupling it is used for 3 vent pipe installation Make sure the marking TOP is located on the top side of the pipe in horizontal venting applications The straight side of the coupling must be on b...

Page 34: ...THROUGH COMBUSTIBLE WALLS Pitch 1 4 Inch Per Foot CLEARANCE 0 ACCEPTABLE FOR PVC VENT PIPE 1 ACCEPTABLE FOR TYPE 29 4C STAINLESS STEEL VENT PIPE 12 MINIMUM ABOVE NORMALLY EXPECTED SNOW ACCUMULATION LE...

Page 35: ...d in the same pressure zone Important Maintain 12 minimum clearance above highest anticipated snow level or grade whichever is greater Note All distances are centerline to centerline 6 Min 24 Max 12 M...

Page 36: ...hin 3 feet of the vent terminal The vent for this appliance shall not terminate 1 Over public walkways or 2 Near soffit vents or crawl space vents or other areas where condensate or vapor could create...

Page 37: ...e met at the time of completion of installation the owner shall have a period of thirty 30 days to comply with the above requirements provided however that during said thirty 30 day period a battery o...

Page 38: ...ilding or the combustion air inlet to any other appliance 6 inches 15 cm for appliances 10 000 BTUH 3 kw 12 inches 30 cm for appliances 10 000 BTUH 3 kw and 100 000 BTUH 30 kw 36 inches 91 cm for appl...

Page 39: ...building or the combustion air inlet to any other appliance 6 inches 15 cm for appliances 10 000 Btuh 3 kw 12 inches 30 cm for appliances 10 000 Btuh 3 kw and 100 000 Btuh 30 kw 36 inches 91 cm for a...

Page 40: ...ABOVE ROOF VENT COMBUSTION AIR BAYAIR30AVENTA BAYAIR30CNVENT REMOVE RIBS FROM CAP COMBUSTION AIR ROOF FLASHING BOOT FIELD SUPPLIED COMBUSTION AIR VENT ELBOW FIELD SUPPLIED MAINTAIN 12 IN 18 IN FOR CA...

Page 41: ...ITABLE SUPPORT METHOD Venting Through an UNUSED Chimney Important Refer to Section 12 6 8 of NFPA 54 ANSI 223 1 2012 when routing vent piping through a chimney Important The single wall flue pipe join...

Page 42: ...choose to remodel or change the area which contains your Furnace Furnaces must have a free flow of air for proper performance Provisions for combustion and ventilation air shall be made in accordance...

Page 43: ...arranties are not available in some instances Extended warranty does not cover repairs to equipment installed in establishments with corrosive atmospheres including but not limited to dry cleaners bea...

Page 44: ...te with the outdoors Refer to the Minimum Free Area in square inches for confined spaces table for minimum open areas required CONFINED SPACE AIR FROM OUTDOORS CONFINED SPACE OUTLET OUTDOOR AIR DUCTS...

Page 45: ...i e central hall When the furnace is installed so that the supply ducts carry air circulated by the furnace to areas outside the space containing the furnace the return air shall also be handled by a...

Page 46: ...na ac ce es s m mu us st t h ha av ve e d dr ra ai in n p pa an ns s t th ha at t a ar re e s su ui it ta ab bl le e f fo or r 4 40 00 0 F F 2 20 05 5 C C o or r h ha av ve e a a m me et ta al l d dr...

Page 47: ...L LK KI IT TA AA A k ki it t C Co oi il ls s i in ns st ta al ll le ed d o on n u up pf fl lo ow w f fu ur rn na ac ce es s m mu us st t h ha av ve e d dr ra ai in n p pa an ns s t th ha at t a ar re...

Page 48: ...p pf fl lo ow w f fu ur rn na ac ce es s m mu us st t h ha av ve e d dr ra ai in n p pa an ns s t th ha at t a ar re e s su ui it ta ab bl le e f fo or r 4 40 00 0 F F 2 20 05 5 C C o or r h ha av ve...

Page 49: ...rforation 2 Starting at the back of the furnace cut the side flanges along perforations until past the end of the heat shield to avoid interference when bending 3 Bend furnace side flanges down 4 Supp...

Page 50: ...d Downflow Furnace no Coil Important A BAYBASE is required when installing the furnace on a combustible floor 1 Bend furnace flanges up 2 Attach ducting 3 Seal per local codes and requirements D Du uc...

Page 51: ...upported separately An external overflow drain pan must be installed in all applications over a finished ceiling to prevent property damage Upflow Furnace with Bottom Return in Closet with Remote Filt...

Page 52: ...will use ducted air from a remote location 3 Install filter at a remote location 4 Seal per local codes and requirements Upflow Furnace with Bottom Return Mounted on a Ducted Pedestal with Filter Box...

Page 53: ...AYLIFT kit to lift furnace Follow kit instructions Note The furnace bottom pedestal must be a minimum of 6 in height 3 Match the filter cabinet flush to the back and bottom sides of the furnace cabine...

Page 54: ...ut No Cut Area Upflow Furnace with Two Side Returns Important One of the sides must have a transition to allow the condensate and thermostat wiring to exit the cabinet Important If a transition is not...

Page 55: ...ducting to the top of the furnace 3 Install remote filter 4 Seal per local codes and requirements Downflow Furnace with Top Return and Plenum 1 Remove the top plate 2 Attach the plenum ducting to the...

Page 56: ...ns continued Downflow Furnace with Top Return and Plenum with Filter Box 1 Remove the top plate 2 Attach the filter box to the top of the furnace 3 Attach ducting 4 Seal per local codes and requiremen...

Page 57: ...for Upflow Bottom and Side Return Air Filter Installations All return air duct systems should provide for installation of return air filters 1 Determine the appropriate position to set the furnace in...

Page 58: ...ould be cleaned out Thin cloths should be placed over the registers and the furnace fan should be run for 10 minutes Don t forget to remove the cloths before you start the furnace 4 The horizontal ins...

Page 59: ...70 if an external electrical source is utilized The integrated furnace control is polarity sensitive The hot leg of the 120V power supply must be connected to the black power lead as indicated on the...

Page 60: ...OR BOTH FURNACES TWINNING CONNECTION DIAGRAM 1 STAGE HEAT 1 STAGE COOLING WITH TRANSFORMER THERMOSTAT 1 STAGE HEATING 1 STAGE COOLING THERMOSTAT FURNACE NO 1 FURNACE NO 2 ISOLATION RELAY FIELD SUPPLIE...

Page 61: ...n resistant condensate pump must be used if a pump is required for a specific drain system C CA AU UT TI IO ON N W Wa at te er r D Da am ma ag ge e P Pr ro op pe er rt ty y D Da am ma ag ge e I It t i...

Page 62: ...PRIMARY DRAIN VENT STACK MUST TERMINATE BELOW THE BOTTOM OF THE CONDENSATE TRAP IF THE FURNACE IS INSTALLED OVER A FINISHED CEILING OVERFLOW FROM THE PRIMARY DRAIN VENT STACK MUST FLOW INTO AN AUXILI...

Page 63: ...the condensate tubing off and connect the tubing to the condensate trap Install the condensate grommet into the bottom panel Cut to length as needed DOWNFLOW FURNACES WITH BOTTOM DRAIN CONDENSATE PIPE...

Page 64: ...f the excess tube and reinstall the end fitting to the drain hose 1 5 8 DIAMETER HOLE MUST BE CUT IN LEFT SIDE OF CASE BOTTOM HOLE MUST BE PLUGGED DOWNFLOW FURNACES LEFT SIDE DRAIN IF THE FURNACE IS I...

Page 65: ...11 16 hole drilled through the cabinet and insert into drain line hose Secure with the spring clip Note Seal around the condensate drain tubing where it exits the cabinet Cut hose Approx 4 11 16 DIAME...

Page 66: ...ensate will block drains resulting in furnace shutdown If the drain line cannot be installed in a conditioned space then UL listed heat tape should be applied as required to prevent freezing per manuf...

Page 67: ...he e f fu ur rn na ac ce e To shut off For complete shutdown Turn the toggle or control switch located on the main gas valve inside the unit to the OFF position and the external main gas shutoff valve...

Page 68: ...ns and the options for venting the inlet and exhaust combustion air I Im mp po or rt ta an nt t When looking at the different orientations the direction of the combustion air exhaust in the illustrati...

Page 69: ...tion air exhaust vented through left side Note Requires a hole to be drilled in the case Refer to the illustrations below to find the approved venting options for downflow furnace models Important The...

Page 70: ...vent outlet adaptor and insert into inducer outlet 2 Twist to insure PVC is fully inserted 3 Tighten the clamp on the end of the 45 degree elbow 4 Tighten the clamp on the outlet vent adapter Note The...

Page 71: ...conversion easier 1 Disconnect all drain tubes from condensate trap Note When removing condensate hoses from the condensate trap hold the trap with your hand to prevent the trap from breaking Removin...

Page 72: ...default openings on the top of the cabinet 1 Remove the three inducer mounting screws 2 Rotate inducer counter clockwise so that the inducer outlet aligns with the exhaust vent outlet 3 Insert and re...

Page 73: ...in a horizontal plane Use coupling CPL00938 Canadian applications may use BAYREDUCE to meet ULC S636 requirements See Horizontal Venting section for proper orientation of 2 x 3 offset coupling 1 Remo...

Page 74: ...ap from breaking Removing the trap before the hoses is also an option 2 Remove drain tubing from bottom of inducer housing 3 Remove rain gutter tubing from inducer outlet 4 Remove tubing from condensa...

Page 75: ...ommet 3 Remove two 3 plugs on right side of cabinet To be used for combustion air exhaust and inlet 4 Reuse the two 3 plugs to seal the two 3 default openings on the top of the furnace 1 Attach the ve...

Page 76: ...allation 1 Reinstall the condensate adapter if it was earlier removed or ensure adapter is still in place Important The condensate adapter must be present for proper condensate drain operation 2 Insta...

Page 77: ...ht shows the furnace as it is sent from the factory Use the following steps to modify the furnace for horizontal left with top venting of combustion air Before proceeding lay unit on its back to make...

Page 78: ...tlet gasket to the vent outlet 2 Install vent outlet to top of cabinet using 2 screws supplied in the doc pack 3 Install vent inlet gasket and vent inlet using 4 screws supplied in the doc pack F Fu u...

Page 79: ...ntation of 2 x 3 offset coupling Condensate Trap Installation 1 Reinstall the condensate adapter if it was earlier removed or ensure adapter is still in place Important The condensate adapter must be...

Page 80: ...condensate plug The figure to the right shows the furnace as it is sent from the factory Use the following steps to modify the furnace for horizontal right with left side venting of combustion air Be...

Page 81: ...plugs to seal the two 3 default openings on the top of the cabinet 1 Attach the vent outlet gasket to the vent outlet 2 Install vent outlet to top of cabinet using 2 screws supplied in the doc pack 3...

Page 82: ...t the outlet is pointing vertically 4 Use the three inducer screws to reattach the inducer to the cold header Torque to 30 in lbs Do not overtighten 1 Remove condensate drain plug from top right locat...

Page 83: ...allation 1 Reinstall the condensate adapter if it was earlier removed or ensure adapter is still in place Important The condensate adapter must be present for proper condensate drain operation 2 Insta...

Page 84: ...modify the furnace for horizontal right with bottom venting of combustion air Before proceeding lay unit on its back to make the conversion easier 1 Remove all drain hoses from condensate trap Note W...

Page 85: ...condensate trap grommet 3 Remove 3 plugs on the left side of the cabinet To be used for combustion air inlet 4 Reuse the two 3 plugs to seal the two 3 default openings on the top of the furnace F Fu u...

Page 86: ...onto the cold header outlet located on the bottom left of the cold header 4 Rotate the inducer 180 degrees so that the elbow is pointing towards the left 5 Use the three inducer screws to reattach the...

Page 87: ...onnection is made Note If required transition to larger venting within 2 of the cabinet An 2 x 3 offset coupling is required if the transition is made in a horizontal plane Use coupling CPL00938 Canad...

Page 88: ...with a 1 4 nut driver Do not over torque or use a drill gun 1 Remove port cap on the right side of inducer and connect inducer condensate tubing Connect other end of inducer condensate tubing to top...

Page 89: ...bustion air vented through the top 1 Attach the vent outlet gasket to the vent outlet 2 Install vent outlet to top of cabinet using 2 screws supplied in the doc pack 3 Install vent inlet gasket and ve...

Page 90: ...e clamp should be tightened after the internal connection is made Note If required transition to larger venting within 2 of the cabinet CPL00938 2 x 3 offset coupling may be used and is factory suppli...

Page 91: ...t is not allowed because condensate will not drain Before proceeding lay unit on its back to make conversion easier 1 Disconnect all drain tubes from condensate trap Note When removing condensate hose...

Page 92: ...the two 3 default openings on the top of the cabinet 1 Loosen hose clamp and remove 45 degree adapter If the rubber boot pulls out of the inducer opening remove from the adapter and reinstall onto th...

Page 93: ...1 Attach the vent outlet gasket to the vent outlet 2 Install vent outlet to cabinet using 2 screws supplied in the doc pack 3 Install vent inlet gasket and vent inlet using 4 screws supplied in the d...

Page 94: ...or proper orientation of 2 x 3 offset coupling 1 Remove port cap at bottom of inducer and connect inducer condensate tubing Connect other end of inducer condensate tubing to top port on the condensate...

Page 95: ...ENU key and then depress the OPTION key to the desired setting Then momentarily depress the MENU key again to save the change 180 C1 7 C1 8 C1 9 C1 1 C1 2 HtP Heating Speed Tap H1 5 H1 6 01 H1 7 H1 8...

Page 96: ...TP1 9 Tap selected for airflow NOTE 1 The menu status displayed is solely dependent on the input of 24VAC that is applied to the low voltage terminal strip 2 The status will alternate between the sys...

Page 97: ...ssure in W C versus Tap Static 0 1 0 3 0 5 0 7 0 9 Tap Torque 1 20 SCFM 911 766 622 477 332 Watts 94 104 115 125 136 2 31 SCFM 1075 963 851 740 628 Watts 139 153 168 182 197 3 40 SCFM 1215 1121 1028 9...

Page 98: ...U4SAA Default Tap 7 Cooling HP 3 Ton Single Stage Outdoor Total ESP 0 7 W C Required Airflow 1050 cfm 3T x 350 cfm ton New Tap Number Tap 5 Re check static pressure and adjust airflow as necessary S S...

Page 99: ...er sensed one hour lockout after 6 times e2 2 Recycles Exceeded Flame sensed then lost one hour lockout after 10 times e2 3 Gas Valve Not Energized When It Should Be exceeded after 10 times e3 Shorted...

Page 100: ...setting Factory Defaults 1 Display must be in Idle Mode 2 Push the Menu and Option buttons at the same time for 15 seconds then release 3 The 7 segment will flash FD 3 times This confirms the unit has...

Page 101: ...IFC marked as FP To measure the flame current use a VOM set to DC volts 1VDC 1 micro amp Flame current will vary depending on the type of meter used Typical flame current ranges from 0 75 3 0 micro a...

Page 102: ...102 88 A951X001 1B EN N No ot te es s...

Page 103: ...88 A951X001 1B EN 103 N No ot te es s...

Page 104: ...protect food and perishables and increase industrial productivity and efficiency We are a global business committed to a world of sustainable progress and enduring results ingersollrand com Ingersoll...

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