Trane S8B1A026M2PSC Manual
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Trane S8B1A026M2PSC Manual

Trane S8B1A026M2PSC Manual

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Installation, Operation, and Maintenance
Upflow/Downflow/Horizontal
Gas-Fired, 1–Stage and 2–Stage Induced Draft Furnaces with
High Efficiency Motor
U U p p f f l l o o w w , , D D o o w w n n f f l l o o w w , , H H o o r r i i z z o o n n t t a a l l R R i i g g h h t t / / L L e e f f t t
Single Stage
S8B1A026M2PSC
S8X1A026M2PSC
S8B1A040M3PSC
S8X1A040M3PSC
S8B1B040M2PSC
S8X1B040M2PSC
S8B1B060M4PSC
S8X1B060M4PSC
S8B1B080M4PSC
S8X1B080M4PSC
S8B1C080M5PSC
S8X1C080M5PSC
S8B1C100M5PSC
S8X1C100M5PSC
S8B1D120M5PSC
S8X1D120M5PSC
N N o o t t e e : : This Installation, Operation, and Maintenance is used for multiple furnace
families. Models may have a "T" in the 12th digit designating they meet
California less than 40 ng/J (NOx) emissions requirements.
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.
May 2022
Two Stage
S8X2A040M3PSC
S8X2B060M4PSC
S8X2B080M4PSC
S8X2C080M5PSC
S8X2C100M5PSC
S8X2D120M5PSC
S8XB-SVX001-1A-EN
S S A A F F E E T T Y Y W W A A R R N N I I N N G G
S S 8 8 X X B B - - S S V V X X 0 0 0 0 1 1 - - 1 1 A A - - E E N N
S8X1
S8B1
N N o o t t e e : : Graphics in this document are for
representation only. Actual model may
differ in appearance.
S8X2

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  • Page 1 U U p p f f l l o o w w , , D D o o w w n n f f l l o o w w , , H H o o r r i i z z o o n n t t a a l l R R i i g g h h t t / / L L e e f f t t Single Stage Two Stage S8B1A026M2PSC S8X1A026M2PSC S8X2A040M3PSC...
  • Page 2 SAFETY SECTION NON-CONDENSING FURNACES I I m m p p o o r r t t a a n n t t : : — This document pack contains a wiring W W A A R R N N I I N N G G diagram and service information.
  • Page 3 S S A A F F E E T T Y Y S S E E C C T T I I O O N N N N O O N N - - C C O O N N D D E E N N S S I I N N G G F F U U R R N N A A C C E E S S W W A A R R N N I I N N G G W W A A R R N N I I N N G G W W A A R R N N I I N N G G ! !
  • Page 4 S S A A F F E E T T Y Y S S E E C C T T I I O O N N N N O O N N - - C C O O N N D D E E N N S S I I N N G G F F U U R R N N A A C C E E S S W W A A R R N N I I N N G G W W A A R R N N I I N N G G E E X X P P L L O O S S I I O O N N H H A A Z Z A A R R D D ! !
  • Page 5 S S A A F F E E T T Y Y S S E E C C T T I I O O N N N N O O N N - - C C O O N N D D E E N N S S I I N N G G F F U U R R N N A A C C E E S S C C A A U U T T I I O O N N C C A A U U T T I I O O N N S S H H A A R R P P E E D D G G E E H H A A Z Z A A R R D D ! !
  • Page 6 . . The following steps shall be followed for each appliance connected to the venting For more information, visit www.trane.com and www. system being placed into operation, while americanstandardair.com or contact your installing dealer.

  • Page 7: Table Of Contents

    Table of Contents Accessories....... . . 8 Electrical Connections ....41 Field Wiring .

  • Page 8: Accessories

    Accessories Table 1. Accessories Description Model Number Use with Horizontal Hanging Kit BAYHANG All Furnaces Dual Return Kit (B size extension) BAYLIFTB B Cabinet Furnaces Dual Return Kit (C size extension) BAYLIFTC C Cabinet Furnaces Dual Return Kit (D size extension) BAYLIFTD D Cabinet Furnaces BAYBASE205...

  • Page 9: Product Specification

    Product Specification MODEL S8*1A026M2PSC S8*1A040M3PSC S8*1B040M2PSC S8*1B060M4PSC Upflow / Horizontal / Upflow / Horizontal / Upflow / Horizontal / Upflow / Horizontal / Type Downflow Downflow Downflow Downflow RATINGS Input BTUH 26,000 40,000 40,000 60,000 Capacity BTUH (ICS) 21,000 32,300 32,500 48,700 Temp.
  • Page 10 P P r r o o d d u u c c t t S S p p e e c c i i f f i i c c a a t t i i o o n n MODEL S8*1B080M4PSC S8*1C080M5PSC...
  • Page 11 P P r r o o d d u u c c t t S S p p e e c c i i f f i i c c a a t t i i o o n n S8X2A040M3PSC S8X2B060M4PSC S8X2B080M4PSC...

  • Page 12: Furnace Installation Guidelines

    Furnace Installation Guidelines The following sections give general guidelines for the d. The Furnace input rate and temperature rise installation of the gas furnaces. must be verified to be within the nameplate marking. Safety Practices and Precautions e. A minimum 4” MERV 11 air filter must be in place.

  • Page 13: Locations And Clearances

    F F u u r r n n a a c c e e I I n n s s t t a a l l l l a a t t i i o o n n G G u u i i d d e e l l i i n n e e s s These furnaces have been classified as Fan Assisted However, before the Furnace is moved into place, be Combustion system CATEGORY I furnaces as required...
  • Page 14 F F u u r r n n a a c c e e I I n n s s t t a a l l l l a a t t i i o o n n G G u u i i d d e e l l i i n n e e s s floor and the Furnace must be located or protected Carbon tetrachloride to avoid physical damage from vehicles.

  • Page 15: Outline Drawing

    Outline Drawing S8XB-SVX001-1A-EN...

  • Page 16: Wiring Diagrams

    Wiring Diagrams NOTES: 1. IF ANY OF THE ORIGINAL WIRING SUPPLIED WITH THIS FURNACE MUST BE REPLACED, IT MUST BE WITH WIRE HAVING A TEMPERATURE RATING OF AT LEAST 105°C. WIRES 12, 18, 20, 48, 49, 50, 51, 92 & 93 MUST BE RATED TO 250°C. 2.
  • Page 17 W W i i r r i i n n g g D D i i a a g g r r a a m m s s 120v 60 Hz. 1 PH NOTES: POWER SUPPLY PER LOCAL CODE 1. IF ANY OF THE ORIGINAL WIRING AS SUPPLIED WITH THIS FURNACE MUST BE REPLACED, IT MUST BE WITH WIRE HAVING A TEMPERATURE RATING OF AT LEAST 105°C.
  • Page 18 W W i i r r i i n n g g D D i i a a g g r r a a m m s s 120v 60 Hz. 1 PH POWER SUPPLY PER LOCAL CODE NOTES: JUNCTION BOX S8X2 1.

  • Page 19: Airflow Tables

    Airflow Tables Furnace Airflow (CFM) Vs. External Static Pressure (in. W.C.) Model Static SCFM / Watts 437 / 29 SCFM / Watts 600 / 42 359 / 48 119 / 54 SCFM / Watts 650 / 47 435 / 56 219 / 65 SCFM / Watts 721 / 59...
  • Page 20 A A i i r r f f l l o o w w T T a a b b l l e e s s Furnace Airflow (CFM) Vs. External Static Pressure (in. W.C.) Model Static SCFM / Watts 552 / 34 160 / 34 SCFM / Watts...

  • Page 21: Cfm Versus Temperature Rise

    CFM Versus Temperature Rise S8B1/S8X1 Furnaces have one stage heating S8X2 Furnaces have two stage heating. First Stage is Low heating and Second Stage is High heating. Table 2. S8B1/S8X1 CFM Versus Temperature Rise Model 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 S8*1A026M2PSC 39 32 S8*1A040M3PSC...

  • Page 22: Furnace General Installation

    Furnace General Installation The following sections give general instructions for the installation of the gas furnaces. S-Series Furnace Panel Removal Note: For the S8X2 furnace, a 5/16” Allen wrench is required to Note: For the S8B1/S8X1 furnace, a 1/4" nut driver is required to remove the four latches on the front panel.
  • Page 23 F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n Gas Piping Important: The furnace default is left side gas piping.
  • Page 24 F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n Note: For ease of installation, optional accessory part PIP02095 is recommended for gas piping entering the right side of the furnace.
  • Page 25 F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n The furnace is shipped standard for left side installation of gas piping.

  • Page 26: Combustion And Input Check

    F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n Combustion and Input Check Make sure all gas appliances are off except the furnace.

  • Page 27: Gas Valve Adjustment

    F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n Gas Valve Adjustment Changes can be made by adjusting the manifold pressure, or changing White-Rodgers 36J...

  • Page 28: High Altitude Derate

    F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n High Altitude Derate Input ratings (BTUH) of these Furnaces are based on sea level operation and should not be changed at elevations up to 2,000 ft.

  • Page 29: General Venting

    F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n Table 5.
  • Page 30 F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n Masonry Chimney Venting Type Furnace Tile Lined Chimney...

  • Page 31: Air For Combustion And Ventilation

    F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n Air for Combustion and and ventilation requirements can be supplied from inside the building.
  • Page 32 F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n CONFINED CONFINED SPACE AIR FROM OUTDOORS...

  • Page 33: Duct Connections

    F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n Duct Connections Air duct systems should be installed in accordance with standards for When the furnace is located in a utility room adjacent to the living...
  • Page 34 F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n Table 6.
  • Page 35 F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n Horizontal Right and Downflow Furnace —...
  • Page 36 F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n R R e e t t u u r r n n D D u u c c t t C C o o n n n n e e c c t t i i o o n n s s Return Ducting General Guidelines •...
  • Page 37 F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n Upflow Furnace with Bottom and Side Returns Mounted on a Cabinet cutout when used with BAYLIFT 21”...
  • Page 38 F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n Downflow Furnace with Top Return Downflow Furnace with Top Return and Plenum Refer to...

  • Page 39: Return Air Filters

    F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n Return Air Filters TYPICAL AIR FILTER INSTALLATIONS Filters are not factory supplied for furnaces.
  • Page 40 F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n When the furnace is installed in the horizontal right or left Figure 1.

  • Page 41: Electrical Connections

    F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n Electrical Connections Make wiring connections to the unit as indicated on enclosed wiring diagram.

  • Page 42: Twinning

    F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n Twinning NOTES: TWINNING CONNECTION DIAGRAM...
  • Page 43 F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n NOTES: 1.

  • Page 44: General Start-Up And Adjustment

    General Start-up and Adjustment The following sections give instructions for the general start-up and adjustment of the gas furnaces. Preliminary Inspections With gas and electrical power "OFF", ensure: Turn knob on main gas valve within the unit to the "OFF" position. Turn the external gas valve to "ON".

  • Page 45: Options

    Furnace Combustion Air Exhaust Options Note: Default is left side for electric and gas connections. The following sections give instructions for the I I m m p p o o r r t t a a n n t t : : When looking at the different orientations, different furnace orientations and the options for the direction of the combustion air exhaust venting the exhaust combustion air.
  • Page 46 F F u u r r n n a a c c e e C C o o m m b b u u s s t t i i o o n n A A i i r r E E x x h h a a u u s s t t O O p p t t i i o o n n s s Table 9.

  • Page 47: Combustion Air Conversions

    F F u u r r n n a a c c e e C C o o m m b b u u s s t t i i o o n n A A i i r r E E x x h h a a u u s s t t O O p p t t i i o o n n s s Combustion Air Conversions Pressure Switch locations Important: After deciding the orientation of the flue outlet, cut the...
  • Page 48 F F u u r r n n a a c c e e C C o o m m b b u u s s t t i i o o n n A A i i r r E E x x h h a a u u s s t t O O p p t t i i o o n n s s Horizontal right orientation with top venting Downflow orientation with left side venting Refer...

  • Page 49: Integrated Furnace Control Menu

    Integrated Furnace Control Menu S8XB-SVX001-1A-EN...
  • Page 50 I I n n t t e e g g r r a a t t e e d d F F u u r r n n a a c c e e C C o o n n t t r r o o l l M M e e n n u u S8XB-SVX001-1A-EN...
  • Page 51 I I n n t t e e g g r r a a t t e e d d F F u u r r n n a a c c e e C C o o n n t t r r o o l l M M e e n n u u S8XB-SVX001-1A-EN...
  • Page 52 I I n n t t e e g g r r a a t t e e d d F F u u r r n n a a c c e e C C o o n n t t r r o o l l M M e e n n u u S8XB-SVX001-1A-EN...
  • Page 53 I I n n t t e e g g r r a a t t e e d d F F u u r r n n a a c c e e C C o o n n t t r r o o l l M M e e n n u u S8B1 - S8X1 - S8X2 Run Test Mode Run Test Mode:...

  • Page 54: Belly Band Location

    Belly Band Location Distance from belly band to the front face of motor for minimum vibration Furnace Model Dimension “A” (inches) A026 3.5 (3–1/2) A040 3.75 (3–3/4) B040 3.5 (3–1/2) B060 4 ton 4.25 (4–1/4) B080 4.25 (4–1/4) 1.00 Blower housing and wheel removed from view for clarity. Furnace Model Dimension “A”...

  • Page 55: Setting Airflow

    Setting Airflow With all ductwork connected and a clean filter in place, measure the External Static Pressure (ESP) of the unit in locations below. Use the appropriate airflow table for the furnace and outdoor unit installed. Note: See Airflow Tables section in this document. Evaporator Coil Measurements must be made prior to the evaporator coil, if equipped,...

  • Page 56: Codes

    Integrated Furnace Control Display Codes Menu Options Idle Active Alarm Menu Last 6 Faults (To clear — Hold Option button down for 5 seconds after entering the L6F menu) Code Release Number Cooling Off Delay (Seconds) Outdoor Unit Type (Single / Two Stage) Blower Constant Fan Airflow Heat Off Delay (Seconds) Inter-Stage Delay (Seconds)

  • Page 57: Fault Code Recovery

    I I n n t t e e g g r r a a t t e e d d F F u u r r n n a a c c e e C C o o n n t t r r o o l l D D i i s s p p l l a a y y C C o o d d e e s s Fault Code Recovery Fault Code Recovery S8X1 IFC Component Layout...

  • Page 58: Troubleshooting

    Troubleshooting The following pages include troubleshoo ng flowcharts in reference for the 1 Stage S8B1, S8X1 and 2 Stage S8X2 families of furnaces only. The informa on contained is for reference only and does not cover all scenarios or problems that may be encountered. ONLY qualified technicians should a empt to install, troubleshoot, or repair this appliance.
  • Page 59 T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g GETTING STARTED Is 120 VAC Is the IFC Seven Is 120 VAC Is 120 VAC measured measured Segment LED on?
  • Page 60 T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g DEFINITION 2.1 Fault Code RETRY Lock Out = 3 unsuccessful tries for igni on within a single call for heat.
  • Page 61 T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g DEFINITION 2.2 Fault Code RECYCLE Lock Out = 10 recycles within a single call for heat.
  • Page 62 T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g DEFINITION An error has occurred with the PS1, indica ng that the pressure Note #1 switch is closed when it should be open.
  • Page 63 T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g DEFINITION Note #1 An error has occurred with the PS1 indica ng that the pressure switch is either open when it should be closed.
  • Page 64 T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g DEFINITION An error has occurred with the PS2, indica ng that the pressure Note #1 switch is closed when it should be open.
  • Page 65 T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g DEFINITION Note #1 An error has occurred with the PS2 indica ng that the pressure 24 volts = Open Switch switch is open when it should be closed.
  • Page 66 T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g See next page for DEFINITION 4.0 Fault Code addi onal 4 flash Limit switches are safety devices faults that will open when an abnormal...
  • Page 67 T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g DEFINITION 4.0 Fault Code Limit switches are safety devices Flame Rollout that will open when an abnormal high temperature has been sensed.
  • Page 68 T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g DEFINITION 5.0 Fault Code Flame is sensed when it should not be sensed. Disconnect electrical power to furnace Turn off...
  • Page 69 T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g DEFINI Polarity Fault – Incoming high voltage 6.1 Fault Code wiring is reversed Connect volt meter to white incoming...
  • Page 70 T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g DEFINITION: Igniter Relay Fault – The control board has sensed 6.3 Fault Code that the igniter relay has stuck closed igniter Fault –...
  • Page 71 T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g DEFINITION: External Gas Valve 7.1 Fault Code Circuit Error (24 volts is present when it should not be present) Turn Comfort Control to “OFF”...
  • Page 72 T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g DEFINITION: 08 Fault Code The flame sense current is less than 0.5 micro-amp DC Make a call for hea ng...
  • Page 73 T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g 11 Fault Code Defini on: The IFC has detected that internal gas valve relays have failed.
  • Page 74 T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g Con nuous FAN on this unit is limited to TAP 1 only.

  • Page 75: S8X2

    Sequence of Operation S8B1/S8X1/S8X2 N N o o t t e e : : The seven-segment LED readout is based on N N o o t t e e : : There are two flame sense pads located on the thermostat input.
  • Page 76 S S e e q q u u e e n n c c e e o o f f O O p p e e r r a a t t i i o o n n S S 8 8 B B 1 1 / / S S 8 8 X X 1 1 / / S S 8 8 X X 2 2 5.

  • Page 77: Periodic Servicing Requirements

    Periodic Servicing Requirements 1. GENERAL INSPECTION – E E x x a a m m i i n n e e t t h h e e f f u u r r n n a a c c e e N N o o t t e e : : Be careful NOT to break igniter when removing i i n n s s t t a a l l l l a a t t i i o o n n a a n n n n u u a a l l l l y y f f o o r r t t h h e e f f o o l l l l o o w w i i n n g g i i t t e e m m s s : : burners.
  • Page 78 N N o o t t e e s s S8XB-SVX001-1A-EN...
  • Page 79 N N o o t t e e s s S8XB-SVX001-1A-EN...
  • Page 80 About Trane and American Standard Heating and Air Conditioning Trane and American Standard create comfortable, energy efficient indoor environments for residential applications. For more information, please visit www.trane.com or www.americanstandardair.com. The manufacturer has a policy of continuous data improvement and it reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.

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