S8XB S8B1A040M3PSC Gas Fired 1 Stage and 2 Stage Induced Draft Furnaces Installation Guide

: June 15, 2024
: S8XB

Table of Contents

S8B1A040M3PSC Gas Fired 1 Stage and 2 Stage Induced Draft Furnaces
Product Information
Specifications
Product Usage Instructions
Installation
Operation
Maintenance
- FAQ
Q: Can I use field fabricated venting components for my
Q: Should I install a gas detecting warning device with the

S8B1A040M3PSC Gas Fired 1 Stage and 2 Stage Induced Draft Furnaces

Product Information

Specifications

Models: S8B1A040M3PSC, S8X1A040M3PSC, S8X2A040M3PSC,
S8B1B040M2PSC, S8X1B040M2PSC, S8X2B060M4PSC, S8B1B060M4PSCA/B,
S8X1B060M4PSCA/B, S8X2B080M4PSC, S8B1B080M4PSCA/B,
S8X1B080M4PSCA/B, S8X2C080M5PSC, S8B1C080M5PSC, S8X1C080M5PSC,
S8X2C100M5PSC, S8B1C100M5PSCB, S8X1C100M5PSCB, S8X2D120M5PSC,
S8B1D120M5PSC, S8X1D120M5PSC
Furnace Type: Upflow, Downflow, Horizontal Right/Left
Stage: Single Stage, Two Stage
Installation Date: August 2023

Product Usage Instructions

Installation

To install the furnace, follow these steps:

Ensure the furnace is powered off during installation.
Refer to the installation instructions and wiring diagrams
provided with the evaporator coil for proper installation and
connection.
Only qualified personnel should perform the installation.

Operation

To operate the furnace:

Ensure the furnace is powered on.
Follow the operating instructions provided in the user manual
specific to your furnace model.
Monitor the furnace for any unusual behavior or
malfunctions.

Maintenance

To maintain the furnace:

Regularly clean and inspect the furnace components according to
the maintenance instructions provided in the user manual.
Replace any worn-out or damaged parts with genuine replacement
parts recommended by the manufacturer.
Schedule periodic maintenance checks by a qualified service
agency to ensure optimal performance.

FAQ

Q: Can I use field fabricated venting components for my

furnace?

A: No, it is important not to replace factory supplied venting
components with field fabricated parts. This can result in damaged
vents and components, allowing carbon monoxide to escape the
venting system. Always use the recommended venting components
provided by the manufacturer.

Q: Should I install a gas detecting warning device with the

furnace?

A: Yes, it is recommended to install a gas detecting warning
device in case of a gas leak. However, please note that the
manufacturer of your furnace does not test any detectors and does
not make any representations regarding any brand or type of
detector.

Installation, Operation, and Maintenance

Upflow/Downflow/Horizontal Gas-Fired, 1Stage and 2Stage Induced Draft Furnaces with High Efficiency Motor

Upflow, Downflow, Horizontal Right/Left

Single Stage

Two Stage

S8B1A040M3PSC S8X1A040M3PSC S8X2A040M3PSC S8B1B040M2PSC S8X1B040M2PSC S8X2B060M4PSC S8B1B060M4PSCA/B S8X1B060M4PSCA/B S8X2B080M4PSC S8B1B080M4PSCA/B S8X1B080M4PSCA/B S8X2C080M5PSC S8B1C080M5PSC S8X1C080M5PSC S8X2C100M5PSC S8B1C100M5PSCB S8X1C100M5PSCB S8X2D120M5PSC S8B1D120M5PSC S8X1D120M5PSC

S8X2

S8X1

Note: 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.

S8B1
Note: Graphics in this document are for representation only. Actual model may differ in appearance.

FIRE HAZARD!

WARNING

Failure to follow this Warning could result in property damage, severe personal injury, or death. This Warning applies to installations with a flammable refrigeration system. The furnace must be powered except for service. The furnace shall be installed and connected according to installation instructions and wiring diagrams that are provided with the evaporator coil.

S8XB-SVX001-1B-EN

SAFETY WARNING

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 2023

S8XB-SVX001-1B-EN

SAFETY SECTION NON-CONDENSING FURNACES

Important: — This document pack contains a wiring diagram and service information. This is customer property and is to remain with this unit. Please return to service information pack upon completion of work.
WARNING
FIRE OR EXPLOSION HAZARD!
Failure to follow safety warnings exactly could result in a fire or explosion causing property damage, personal injury or loss of life.
— Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. — WHAT TO DO IF YOU SMELL GAS
· Do not try to light any appliance.
· Do not touch any electrical switch;do not use any phone in your building.
· Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
· If you cannot reach your gas supplier, call the fire department.
— Installation and service must be performed by a qualified installer, service agency, or the gas supplier.

WARNING
ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD!
Failure to follow this Warning could result in dangerous operation, property damage, severe personal injury, or death. Improper servicing could result in dangerous operation, property damage, severe personal injury, or death.
· Before servicing, disconnect all electrical power to furnace.
· When servicing controls, label all wires prior to disconnection. Reconnect wires correctly.
· Verify proper operation after servicing.
WARNING
CARBON MONOXIDE POISONING HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. To ensure furnace is vented properly, do not replace factory supplied venting components with field fabricated parts. Fabricating parts can result in damaged vents and components allowing carbon monoxide to escape the venting system.

WARNING
EXPLOSION HAZARD!
Failure to follow this Warning could result in property damage, personal injury or death. Install a gas detecting warning device in case of a gas leak. NOTE: The manufacturer of your furnace does not test any detectors and makes no representations regarding any brand or type of detector.
WARNING
FIRE OR EXPLOSION HAZARD!
Failure to follow the safety warnings exactly could result in serious injury, death, or property damage. Never test for gas leaks with an open flame. Use a commercially available soap solution made specifically for the detection of leaks to check all connections. A fire or explosion may result causing property damage, personal injury, or loss of life.

WARNING
CARBON MONOXIDE HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. When replacing a furnace, ensure the venting system is adequate for the new furnace.
WARNING
FIRE HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. Do not install the furnace directly on carpeting, tile or other combustible material other than wood flooring. For vertical downflow applications, subbase (BAYBASE205) must be used between the furnace and combustible flooring.When the downflow furnace is installed vertically with a cased coil, a subbase is not required.

S8XB-SVX001-1B-EN

SAFETY SECTION NON-CONDENSING FURNACES

WARNING
WARNING!
This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca. gov.
WARNING
EXPLOSION HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. Propane gas is heavier than air and may collect in any low areas or confined spaces. In addition, odorant fade may make the gas undetectable except with a warning device. If the gas furnace is installed in a basement, an excavated areas or a confined space, it is strongly recommended to contact a gas supplier to install a gas detecting warning device in case of leak. The manufacturer of your furnace does not test any detectors and makes no representations regarding any brand or type of detector.
WARNING
ELECTRICAL SHOCK HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. Do not bypass the door switch or panel loop by any permanent means.
WARNING
ELECTRICAL SHOCK HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. Do not touch any components other than the Menu and Option buttons on the IFC when setting up the system or during fault code recovery.
WARNING
FIRE OR EXPLOSION HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. Do NOT attempt to manually light the furnace.

WARNING
CARBON MONOXIDE POISONING HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. Follow the service and/or periodic maintenance instructions for the Furnace and venting system.
WARNING
CARBON MONOXIDE POISONING HAZARD!
Failure to follow this Warning could result in serious personal injury or death. Make sure that the blower door is in place and not ajar. Dangerous fumes could escape an improperly secured door.
WARNING
ELECTRICAL SHOCK HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. Disconnect power to the unit before removing the blower door. Allow a minimum of 10 seconds for IFC power supply to discharge to 0 volts.
WARNING
SAFETY HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. These furnaces are not approved or intended for installation in manufactured (mobile) housing, trailers, or recreational vehicles.
WARNING
EXPLOSION HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. In the event that electrical, fuel, or mechanical failures occur, shut gas supply off at the manual gas valve located on the supply gas piping coming into the furnace before turning off the electrical power to the furnace. Contact the service agency designated by your dealer.

S8XB-SVX001-1B-EN

SAFETY SECTION NON-CONDENSING FURNACES

WARNING
EXPLOSION HAZARD!
Failure to follow this Warning could result in property damage, serious personal injury, or death. Do not store combustible materials, gasoline, or other flammable vapors or liquids near the unit.
WARNING
SAFETY HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. Do not use semi-rigid metallic gas connectors (flexible gas lines) within the furnace cabinet.
WARNING
INSTALLATION WARNING HIGH VOLTAGE MOVING PARTS!
Failure to follow this Warning could result in property damage, severe personal injury, or death. Bodily injury can result from high voltage electrical components, fast moving fans, and combustible gas. For protection from these inherent hazards during installation and servicing, the main gas valve must be turned off and the electrical supply must be disconnected. If operating checks must be performed with the unit operating, it is the technician’s responsibility to recognize these hazards and proceed safely.
WARNING
SAFETY HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. Do not install the filter in the return duct directly above the furnace in horizontal applications. Install the filter remotely.
WARNING
SAFETY HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. Turn the power to the furnace off before servicing filters to avoid contact with moving parts.

WARNING
CARBON MONOXIDE HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. Furnace venting into an unlined masonry chimney or concrete chimney is prohibited.
WARNING
CARBON MONOXIDE HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. The chimney liner must be thoroughly inspected to insure no cracks or other potential areas for flue gas leaks are present in the liner. Liner leaks will result in early deterioration of the chimney.
WARNING
SHOCK HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. If a disconnect switch is present, it must always be locked in the open position before servicing the unit.
WARNING
OVERHEATING AND EXPLOSION HAZARD!
Failure to follow this Warning could result in property damage, personal injury or death. Should overheating occur, or the gas supply fail to shut off, shut off the gas valve to the unit before shutting off the electrical supply.
CAUTION
IMPROPER VOLTAGE CONNECTION!
Failure to follow this Caution could result in property damage. Do NOT connect the furnace line voltage to a GFCI protected circuit.
CAUTION
CORROSION WARNING!
Failure to follow this Caution could result in property damage or personal injury. Do not install the furnace in a corrosive or contaminated atmosphere.

S8XB-SVX001-1B-EN

SAFETY SECTION NON-CONDENSING FURNACES

CAUTION
SHARP EDGE HAZARD!
Failure to follow this Caution could result in property damage or personal injury. Be careful of sharp edges on equipment or any cuts made on sheet metal while installing or servicing.
CAUTION
BACKUP WRENCH REQUIRED!
Failure to follow this Caution could result in property damage or personal injury. Use a backup wrench on the gas valve when installing gas piping to prevent damage to the gas valve and manifold assembly.
CAUTION
FREEZE CAUTION!
Failure to follow this Caution could result in property damage or personal injury. If complete furnace shutdown is done during the cold weather months, provisions must be taken to prevent freeze-up of all water pipes and water receptacles.
CAUTION
FREEZE CAUTION!
Failure to follow this Caution could result in property damage or personal injury. Whenever your house is to be vacant, arrange to have someone inspect your house for proper temperature. This is very important during freezing weather. If for any reason your furnace should fail to operate damage could result, such as frozen water pipes.
CAUTION
IGNITION FUNCTION!
Failure to follow this Caution may result in poor ignition characteristics. Maintain manifold pressure in high altitude installations.

CAUTION
WATER DAMAGE!
Failure to follow this Caution could result in property damage or personal injury. It is recommended that an external overflow drain pan be installed in all applications over a finished ceiling to prevent property damage or personal injury from leaking condensate.
CAUTION
HOT SURFACE!
Failure to follow this Caution could result in personal injury. Do NOT touch igniter. It is extremely hot.
CAUTION
FURNACE SERVICE CAUTION!
Failure to follow this Caution could result in property damage or personal injury. Label all wires prior to disconnection when servicing controls. Verify proper operation after servicing. Wiring errors can cause improper and dangerous operation.
CAUTION
DO NOT USE AS CONSTRUCTION HEATER!
Failure to follow this Caution could result in property damage or personal injury. In order to prevent shortening its service life, the Furnace should NOT be used as a “Construction Heater” during the finishing phases of construction until the requirements listed in the Furnace Installation Guidelines section have been met. Condensate in the presence of chlorides and fluorides from paint, varnish, stains, adhesives, cleaning compounds, and cement create a corrosive condition which may cause rapid deterioration of the heat exchanger.
CAUTION
WIRING INFORMATION!
Failure to follow this Caution could result in property damage or personal injury. The integrated furnace control is polarity sensitive. The hot leg of the 120 VAC power must be connected to the BLACK field lead.

S8XB-SVX001-1B-EN

SAFETY SECTION NON-CONDENSING FURNACES

CAUTION
EQUIPMENT DAMAGE!
UV light exposure can cause the plastic blower material to deteriorate which could lead to Blower Housing Damage. For units containing a plastic Blower Housing, Do NOT install third party Ultra-Violet Air Cleaners where the Blower Housing can be exposed to UV light.
For more information, visit www.trane.com and www. americanstandardair.com or contact your installing dealer. 6200 Troup Highway Tyler, TX 75707

WARNING
CARBON MONOXIDE POISONING HAZARD!
Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon monoxide poisoning or death.
The following steps shall be followed for each appliance connected to the venting system being placed into operation, while all other appliances connected to the venting system are not in operation:
· Inspect the venting system for proper size and horizontal pitch as required in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and these instructions. Determine there is no blockage or restriction, leakage, corrosion or other deficiencies which could cause an unsafe condition.
· Close all doors and windows between the space in which the appliance(s) connected to the venting system are located. Also close fireplace dampers.
· Turn on clothes dryers and any appliance not connected to the venting system. Turn on any exhaust fans such as range hoods so they are operating at maximum speed. Do not operate a summer exhaust fan.
· Follow the lighting instructions. Place the appliance being inspected into operation. Adjust the thermostat so appliance is operating continuously.
· Test for spillage from draft hood equipped appliances at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle.
· If improper venting is observed during any of the above tests, the venting system must be corrected in accordance with the National Fuel Gas Code, ANSI Z221.1/NFPA 54.
· After it has been determined that each appliance connected to the venting system properly vents when tested, return all doors, windows, exhaust fans, etc. to their previous condition of use.

S8XB-SVX001-1B-EN

Table of Contents
Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Part List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Product Specification . . . . . . . . . . . . . . . . . . . . . . . 9
Furnace Installation Guidelines . . . . . . . . . . . . 13 Safety Practices and Precautions. . . . . . . . . . 13 General Guidelines . . . . . . . . . . . . . . . . . . . . . . 13 Locations and Clearances . . . . . . . . . . . . . . . . 14
Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Airflow Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
CFM Versus Temperature Rise. . . . . . . . . . . . . 22
Furnace General Installation . . . . . . . . . . . . . . . 23 S-Series Furnace Panel Removal . . . . . . . . . . 23 Horizontal Installation in an Attic or Crawlspace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Combustion and Input Check. . . . . . . . . . 27 Gas Valve Adjustment . . . . . . . . . . . . . . . . 28 High Altitude Derate. . . . . . . . . . . . . . . . . . 29 General Venting . . . . . . . . . . . . . . . . . . . . . . . . . 30 Air for Combustion and Ventilation. . . . . . . . 32 Duct Connections. . . . . . . . . . . . . . . . . . . . . . . . 34 Return Air Filters . . . . . . . . . . . . . . . . . . . . . . . . 40

Electrical Connections . . . . . . . . . . . . . . . . . . . 42 Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 42
Twinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
General Start-up and Adjustment. . . . . . . . . . 45 Preliminary Inspections . . . . . . . . . . . . . . . . . . 45 Lighting Instructions . . . . . . . . . . . . . . . . . . . . . 45 Control and Safety Switch Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Furnace Combustion Air Exhaust Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Combustion Air Conversions . . . . . . . . . . . . . 48
Integrated Furnace Control Menu. . . . . . . . . . 50
Belly Band Location . . . . . . . . . . . . . . . . . . . . . . . 55
Setting Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Integrated Furnace Control Display Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Fault Code Recovery . . . . . . . . . . . . . . . . . . . . . 59
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Sequence of Operation S8B1/S8X1/ S8X2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Periodic Servicing Requirements . . . . . . . . . . 79

S8XB-SVX001-1B-EN

Accessories
Table 1. Accessories
Model Number BAYHANG BAYLIFTB BAYLIFTC BAYLIFTD BAYBASE205 BAYFLTR203
BAYFLTR204
BAYFLTR205 BAYFLTR206 BAYSF1165*(a)

Description Horizontal Hanging Kit Dual Return Kit (B size extension) Dual Return Kit (C size extension) Dual Return Kit (D size extension) Downflow Subbase Horizontal Filter Kit
Horizontal Filter Kit
Horizontal Filter Kit Filter Access Door Kit (Downflow only) 1″ SlimFit Box with MERV 4 Filter

BAYSF1255*

1″ SlimFit Filter and Insulated Frame

FLRSF1255 BAYVENT600A BAYVENT800B BAYSWT21AHALTAA BAYSWT22AHALTAA

1″ Filter replacement (Qty 12) Internal venting kit Masonry Chimney Vent Kit High Altitude Pressure Switch Kit High Altitude Pressure Switch Kit

BAYSWT14AHALTAB

High Altitude Pressure Switch Kit

BAYSWT15AHALTAA BAYSWT16AHALTAB BAYSWT17AHALTAA BAYSWT18AHALTAA BAYSWT19AHALTAA

High Altitude Pressure Switch Kit High Altitude Pressure Switch Kit High Altitude Pressure Switch Kit High Altitude Pressure Switch Kit High Altitude Pressure Switch Kit

BAYSWT23AHALTAA

High Altitude Pressure Switch Kit

BAYSWT24AHALTAA

High Altitude Pressure Switch Kit

BAYLPSS400*

Propane Conversion Kit with Stainless Steel Burners

PIP02095

U fitting for gas piping

(a) Airflow greater than 1600 CFM requires dual returns

Part List

· Igniter · Flame Sensor · In-shot Burner(s) · Gas Valve

· Inducer Assembly · Blower Motor · Blower Wheel · IFC (Integrated Furnace Control)

Use with All Furnaces B Cabinet Furnaces C Cabinet Furnaces D Cabinet Furnaces All Furnaces in Downflow orientation B Cabinet Modular Blowers in Downflow/ Horizontal C Cabinet Modular Blowers in Downflow/ Horizontal D Cabinet Modular Blowers in Downflow/ Horizontal All Furnaces in Downflow orientation All Furnaces All furnaces when used in side return application B Cabinet furnaces only when in bottom return application BAYSF1255 B, C, and D Furnaces in Downflow orientation All Furnaces S81A040M3P, S81B040M2P S8X2A040M3P S81C080M5P, S81C100M5P, S81D120M5P S81B060M4P, S81B080M4P S8X2C080M5P S8X2B060M4PSAAA S8X2B080M4P S8X2C100M5P S8X2B060M4PSAAB & later, S8X2B060M4PTAAA & later S8X2D120M5P
All Furnaces
All Furnaces for right hand gas entry
· Pressure Switch(es) · Main Thermal Limit · Roll-Out Switch(es) · Reverse Air Switch(es)

S8XB-SVX001-1B-EN

Product Specification

MODEL
Type
RATINGS (b) Input BTUH Capacity BTUH (ICS) (c) Temp. Rise (Min. – Max.) °F AFUE – Rating (c) Return Air Temp. (Min. – Max.) °F BLOWER DRIVE Diameter – Width (in.) No. Used Speeds (No.) (d)
CFM vs. in. w.g.
Motor HP R.P.M. Volts / Ph / Hz FLA COMBUSTION FAN – Type Drive – No. Speeds Motor RPM Volts/Ph/Hz FLA Inducer Orifice FILTER – Furnished? Type Recommended Hi Vel. (No.-Size-Thk.) VENT PIPE DIAMETER – Min. (in.) HEAT EXCHANGER – Type Gauge (Fired) ORIFICES – Main Nat. Gas Qty. – Drill Size L.P. Gas Qty. – Drill Size
GAS VALVE
PILOT SAFETY DEVICE Type BURNERS – QTY POWER CONN. – V/Ph/HZ (e) Ampacity (Amps) Max. Overcurrent Protection (Amps) PIPE CONN. SIZE (IN.)

S8*1A040M3PSC (a) Upflow / Horizontal / Downflow
40,000 32,300 30 – 60
80
55°F – 80°F
DIRECT 11 X 8
1 CTM – 9 See Fan Performance
Table 1/2
1050 120 / 1 / 60
6.4 PSC Direct – 1 3300 120 / 1 / 60 0.30 1.20 No High Velocity 1 – 14 X 25 – 1 in.
4 Round
Aluminized Steel 20 – 19
2 – 45 2 – 56 Redundant – Single Stage
120 V SiNi Igniter
2 120 / 1 / 60
8.5
15
1/2

S8*1B040M2PSC (a)
Upflow / Horizontal / Downflow

S8*1B060M4PSCA(a)
Upflow / Horizontal / Downflow

S8*1B060M4PSCB(a)
Upflow / Horizontal / Downflow

40,000 32,500 30 – 60
80
55°F – 80°F
DIRECT 11 X 8
1 CTM – 9 See Fan Performance
Table 1/3
1050 120 / 1 / 60
4.1 PSC Direct – 1 3300 120 / 1 / 60 0.30 1.15 No High Velocity 1 – 16 X 25 – 1 in.
4 Round
Aluminized Steel 20 – 19

60,000 48,700 30 – 60
80
55°F – 80°F
DIRECT 11 X 8
1 CTM – 9 See Fan Performance
Table 3/4
1050 120 / 1 / 60
9.2 PSC Direct – 1 3300 120 / 1 / 60 0.30 1.40 No High Velocity 1 – 16 X 25 – 1 in.
4 Round
Aluminized Steel 20 – 19

60,000 48,700 30 – 60
80
55°F – 80°F
DIRECT 11 X 8
1 CTM – 9 See Fan Performance
Table 3/4
1050 120 / 1 / 60
9.2 SP Direct – 1 3300 120 / 1 / 60 1.4 1.40 No High Velocity 1 – 16 X 25 – 1 in.
4 Round
Aluminized Steel 20 – 19

2 – 45 2 – 56 Redundant – Single Stage
120 V SiNi Igniter
2 120 / 1 / 60
5.6
15
1/2

3 – 45 3 – 56 Redundant – Single Stage
120 V SiNi Igniter
3 120 / 1 / 60
12.0
15
1/2

3 – 45 3 – 56 Redundant – Single Stage
120 V SiNi Igniter
3 120 / 1 / 60
13.1
15
1/2

S8XB-SVX001-1B-EN

Product Specification

MODEL

S8*1B080M4 PSCA(a)

Type RATINGS (b)

Upflow / Horizontal / Downflow

Input BTUH

80,000

Capacity BTUH (ICS) (c)

65,100

Temp. Rise (Min. Max.) °F

30 – 60

AFUE – Rating (c)

Return Air Temp. (Min. – Max.) °F

55°F – 80°F

BLOWER DRIVE Diameter – Width (in.)

DIRECT 11 X 8

No. Used Speeds (No.) (d)

1 CTM – 9

CFM vs. in. w.g. Motor HP

See Fan Performance Table
3/4

R.P.M. Volts / Ph / Hz

1050 120 / 1 / 60

FLA

9.2

COMBUSTION FAN Type

PSC

Drive – No. Speeds

Direct – 1

Motor RPM Volts/Ph/Hz

3300 120 / 1 / 60

FLA Inducer Orifice FILTER – Furnished? Type Recommended

0.29 2.15 No High Velocity

Hi Vel. (No.-Size-Thk.)

1 – 16 X 25 – 1 in.

VENT PIPE DIAMETER – Min. (in.)

4 Round

HEAT EXCHANGER Type

Aluminized Steel

Gauge (Fired)

20 – 19

ORIFICES – Main
Nat. Gas Qty. – Drill Size
L.P. Gas Qty. – Drill Size

4 – 45 4 – 56

GAS VALVE

Redundant – Single Stage

PILOT SAFETY DEVICE – Type

120 V SiNi Igniter

BURNERS – QTY

POWER CONN. – V/ Ph/HZ (e)

120 / 1 / 60

Ampacity (Amps)

12.0

Max. Overcurrent Protection (Amps)

PIPE CONN. SIZE (IN.)

1/2

S8*1B080M4 PSCB(a)
Upflow / Horizontal / Downflow
80,000 65,100
30 – 60
80
55°F – 80°F DIRECT 11 X 8 1 CTM – 9
See Fan Performance Table 3/4 1050
120 / 1 / 60 9.2 SP
Direct – 1 3300
120 / 1 / 60 1.4 2.15 No
High Velocity 1 – 16 X 25 – 1 in.
4 Round
Aluminized Steel
20 – 19
4 – 45 4 – 56 Redundant – Single Stage
120 V SiNi Igniter
4 120 / 1 / 60
13.1
15
1/2

S8*1C080M5 PSC (a)
Upflow / Horizontal / Downflow
80,000 64,700
30 – 60
80
55°F – 80°F DIRECT 11 X 11 1 CTM – 9
See Fan Performance Table 1 1050
120 / 1 / 60 10.9 PSC
Direct – 1 3300
120 / 1 / 60 0.30 1.80 No
High Velocity 1 – 20 X 25 – 1 in.
4 Round
Aluminized Steel
20 – 19
4 – 45 4 – 56 Redundant – Single Stage
120 V SiNi Igniter
4 120 / 1 / 60
14.1
15
1/2

S8*1C100M5 PSCB (a)
Upflow / Horizontal / Downflow
100,000 80,700
30 – 60
80
55°F – 80°F DIRECT 11 X 11 1 CTM – 9
See Fan Performance Table 3/4 1050
120 / 1 / 60 10.9 PSC
Direct – 1 3300
120 / 1 / 60 0.33 2.50 No
High Velocity 1 – 20 X 25 – 1 in.
4 Round
Aluminized Steel
20 – 19
5 – 45 5 – 56 Redundant – Single Stage
120 V SiNi Igniter
5 120 / 1 / 60
14.1
15
1/2

S8*1D120M5 PSC (a)
Upflow / Horizontal / Downflow
120,000 98,000
35 – 65
80
55°F – 80°F DIRECT 11 X 11 1 CTM – 9
See Fan Performance Table 1 1050
120 / 1 / 60 10.9 PSC
Direct – 1 3300
120 / 1 / 60 0.33 2.15 No
High Velocity 1 – 24 X 25 – 1 in.
4 Round
Aluminized Steel
20 – 19
6 – 45 6 – 56 Redundant – Single Stage
120 V SiNi Igniter
6 120 / 1 / 60
14.1
15
1/2

S8XB-SVX001-1B-EN

Product Specification

Model
Type
RATINGS (b) 1st Stage Input BTUH 1st Stage Capacity BTUH (ICS) 2nd Stage Input BTUH 2nd Stage Capacity BTUH (ICS) (c) 1st Stage Temp. Rise (Min. – Max.) °F 2nd Stage Temp. Rise (Min. – Max.) °F AFUE (%) (c) Return Air Temp. (Min. – Max.) °F BLOWER DRIVE Diameter – Width (in.) No. Used Speeds (No.) (d) CFM vs. in. w.g. Motor HP R.P.M. Volts / Ph / Hz FLA COMBUSTION FAN – Type Drive – No. Speeds Motor RPM Volts/Ph/Hz FLA Inducer Orifice FILTER – Furnished? Type Recommended Hi Vel. (No.-Size-Thk.) VENT PIPE DIAMETER – Min. (in.) HEAT EXCHANGER – Type Gauge (Fired) ORIFICES – Main Nat. Gas Qty. – Drill Size L.P. Gas Qty. – Drill Size GAS VALVE PILOT SAFETY DEVICE – Type BURNERS – QTY POWER CONN. – V/Ph/HZ (e) Ampacity (Amps) Max. Overcurrent Protection (Amps) PIPE CONN. SIZE (IN.)

S8X2A040M3PSC (a) Upflow / Horizontal / Downflow
26,000 20,900 40,000 32,200 20 – 50 30 – 60
80 55°F – 80°F
DIRECT 11 X 8
1 CTM – 9 See Fan Performance Table
1/2 1050 120 / 1 / 60 6.4 PSC Direct – 2 3300/2600 120 / 1 / 60 0.30 1.20
No High Velocity 1 – 14 X 25 – 1 in.
4 Round Aluminized Steel
20 – 19
2 – 45 2 – 56 Redundant – Two Stage 120 V SiNi Igniter
2 120 / 1 / 60
8.5 15 1/2

S8X2B060M4PSC (a)
Upflow / Horizontal / Downflow

S8X2B080M4PSC (a)
Upflow / Horizontal / Downflow

39,000 31,500 60,000 48,700 20 – 50 30 – 60
80 55°F – 80°F
DIRECT 11 X 8
1 CTM – 9 See Fan Performance Table
3/4 1050 120 / 1 / 60 9.2 PSC Direct – 2 3300/2600 120 / 1 / 60 0.30 1.40
No High Velocity 1 – 16 X 25 – 1 in.
4 Round Aluminized Steel
20 – 19

52,000 42,500 80,000 65,000 25 – 55 30 – 60
80 55°F – 80°F
DIRECT 11 X 8
1 CTM – 9 See Fan Performance Table
3/4 1050 120 / 1 / 60 9.2 PSC Direct – 2 3300/2600 120 / 1 / 60 0.33 1.75
No High Velocity 1 – 16 X 25 – 1 in.
4 Round Aluminized Steel
20 – 19

3 – 45 3 – 56 Redundant – Two Stage 120 V SiNi Igniter
3 120 / 1 / 60
12.0 15 1/2

4 – 45 4 – 56 Redundant – Two Stage 120 V SiNi Igniter
4 120 / 1 / 60
12.0 15 1/2

S8XB-SVX001-1B-EN

Product Specification

Model

S8X2C080M5PSC (a)

S8X2C100M5PSC (a)

S8X2D120M5PSC (a)

Type RATINGS (b)

Upflow / Horizontal / Downflow

1st Stage Input BTUH

52,000

65,000

84,000

1st Stage Capacity BTUH (ICS)

41,800

52,300

67,800

2nd Stage Input BTUH

80,000

100,000

120,000

2nd Stage Capacity BTUH (ICS) (c)

64,900

80,600

98,000

1st Stage Temp. Rise (Min. – Max.) °F

30 – 60

25 – 55

30 – 60

2nd Stage Temp. Rise (Min. – Max.) °F

30 – 60

35 – 65

AFUE (%) (c)

Return Air Temp. (Min. – Max.) °F

55°F – 80°F

BLOWER DRIVE

DIRECT

Diameter – Width (in.)

11 X 11

No. Used Speeds (No.) (d)

1 CTM – 9

CFM vs. in. w.g.

See Fan Performance Table

Motor HP R.P.M. Volts / Ph / Hz

1 1050 120 / 1 / 60

FLA COMBUSTION FAN – Type

10.9 PSC

Drive – No. Speeds

Direct – 2

Motor RPM

3300/2600

Volts/Ph/Hz

120 / 1 / 60

FLA

0.30

0.33

Inducer Orifice FILTER – Furnished? Type Recommended

1.80 No High Velocity

2.50 No High Velocity

2.15 No High Velocity

Hi Vel. (No.-Size-Thk.)

1 – 20 X 25 – 1 in.

1 – 24 X 25 – 1 in.

VENT PIPE DIAMETER – Min. (in.)

4 Round

HEAT EXCHANGER – Type

Aluminized Steel

Gauge (Fired)

20 – 19

ORIFICES – Main Nat. Gas Qty. – Drill Size

4 – 45

5 – 45

6 – 45

L.P. Gas Qty. – Drill Size

4 – 56

5 – 56

6 – 56

GAS VALVE

Redundant – Two Stage

PILOT SAFETY DEVICE – Type

120 V SiNi Igniter

BURNERS – QTY

POWER CONN. – V/Ph/HZ (e)

120 / 1 / 60

Ampacity (Amps)

14.1

Max. Overcurrent Protection (Amps)

PIPE CONN. SIZE (IN.)

1/2

(a) Central Furnace heating designs are certified to ANSI Z21.47 – latest edition. (b) For U.S. applications, above input ratings (BTUH) are up to 2,000 feet, derate 4% per 1,000 feet for elevations above 2,000 feet above sea level. (c) Based on U.S. government standard tests (d) 9 Speed constant torque ECM Blower Motor. (e) The above wiring specifications are in accordance with National Electric Code, however, installations must comply with local codes.

S8XB-SVX001-1B-EN

Furnace Installation Guidelines

The following sections give general guidelines for the installation of the gas furnaces.
Safety Practices and Precautions
The following safety practices and precautions must be followed during the installation, servicing, and operation of this Furnace.
1. Use only with the type gas approved for this Furnace. Refer to the Furnace rating plate.
2. Install the Furnace only in a location and position as specified in “Locations and Clearances” of these instructions.
3. Provide adequate combustion and ventilation air to the Furnace space as specified in “Air for Combustion and Ventilation” of these instructions.
4. Combustion products must be discharged outdoors. Connect this Furnace to an approved vent system only, as specified in the “Venting” section of these instructions.
5. Never test for gas leaks with an open flame. Use a commercially available soap solution made specifically for the detection of leaks to check all connections, as specified in the “Gas Piping” section of these instructions.
6. Always install the 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 on the unit rating plate. Airflow within temperature rise for cfm versus static is shown in the CFM Versus Temperature Rise section in this document accompanying this Furnace.
7. When a 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 duct(s) sealed to the Furnace casing and terminating outside the space containing the Furnace.
8. A gas-fired Furnace for installation in a residential garage must be installed as specified in “Location and Clearances” section of these instructions.
9. The furnace may be used for temporary heating of buildings or structures under construction only when the following conditions have been met:
a. The Furnace venting system must be complete and installed per manufacturer’s instructions.
b. The Furnace is controlled only by a room Comfort Control (no field jumpers).
c. The Furnace return air duct must be complete and sealed to the Furnace.

d. The Furnace input rate and temperature rise must be verified to be within the nameplate marking.
e. A minimum 4″ MERV 11 air filter must be in place.
f. 100% of the Furnace combustion air requirement must come from outside the structure.
g. The Furnace return air temperature range is between 55 and 80 Fahrenheit.
80% models = 55°F
90%+ models = 45°F
h. Clean the Furnace, duct work, and components upon substantial completion of the construction process, and verify Furnace operating conditions including ignition, input rate, temperature rise, and venting, according to the manufacturer’s instructions.
10. In the Commonwealth of Massachusetts, this product must be gas piped by a Licensed Plumber or Gas Fitter.
This Furnace is certified to leak 1% or less of nominal air conditioning CFM delivered when pressurized to .5″ water column with all inlets, outlets, and drains sealed.
General Guidelines
The manufacturer assumes no responsibility for equipment installed in violation of any code or regulation.
It is recommended that Manual J of the Air Conditioning Contractors Association (ACCA) or A.R.I. 230 be followed in estimating heating requirements. When estimating heating requirements for installation at Altitudes above 2000 ft., remember the gas input must be reduced. See Combustion and Input Check.
Material in this shipment has been inspected at the factory and released to the transportation agency without known damage. Inspect exterior of carton for evidence of rough handling in shipment. Unpack carefully after moving equipment to approximate location. If damage to contents is found, report the damage immediately to the delivering agency.
Codes and local utility requirements governing the installation of gas fired equipment, wiring, plumbing, and flue connections must be adhered to. In the absence of local codes, the installation must conform with latest edition of the National Fuel Gas Code ANSI Z223.1 / NFPA 54. The latest code may be obtained from the American Gas Association Laboratories, 400 N. Capitol St. NW, Washington D.C. 20001. 1-800-699-9277 or www.aga.org.

S8XB-SVX001-1B-EN

Furnace Installation Guidelines

These furnaces have been classified as Fan Assisted Combustion system CATEGORY I furnaces as required by ANSI Z21.47 “latest edition”. Therefore they do not require any special provisions for venting other than what is indicated in these instructions.
Warning: These furnaces are not approved or intended for installation in manufactured (mobile) housing, trailers, or recreational vehicles.
Locations and Clearances
The location of the Furnace is normally selected by the architect, the builder, or the installer.
Minimum clearance to combustible materials

However, before the Furnace is moved into place, be sure to consider the following requirements:
1. Is the location selected as near the chimney or vent and as centralized for heat distribution as practical?
2. Do all clearances between the Furnace and enclosure equal or exceed the minimums stated in Clearance Table below?

3. Is there sufficient space for servicing the Furnace and other equipment? A minimum of 24 inches front accessibility to the Furnace must be provided. Any access door or panel must permit removal of the largest component.
4. Are there at least 3 inches 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 unobstructed? If outside air is used, are the openings set 12″ above the highest snow accumulation level?
14

6. Allow sufficient height in supply plenum above the Furnace to provide for cooling coil installation, if the cooling coil is not installed at the time of this Furnace installation.
7. The Furnace shall be installed so electrical components are protected from water.
8. A vertical downflow furnace without a coil, must use BAYBASE205 when installed on combustible flooring.
9. If the Furnace is installed in a garage, it must be installed so that the burners, and the ignition source are located not less than 18 inches above the
S8XB-SVX001-1B-EN

floor and the Furnace must be located or protected to avoid physical damage from vehicles.
10. The gas furnace must not be located where excessive exposure to contaminated combustion air will result in safety and performance related problems. Avoid the following known contaminants:
a. Permanent wave solutions
b. Chlorinated waxes and cleaners
c. Chlorine based swimming pool chemicals
d. Water softening chemicals
e. De-icing salts or chemicals

Furnace Installation Guidelines
f. Carbon tetrachloride g. Halogen type refrigerants h. Cleaning solvents (such as
perchloroethylene) i. Printing inks, paint removers, varnishes, etc. j. Hydrochloric acid k. Cements and glues l. Antistatic fabric softeners for clothes dryers m. Masonry acid washing materials

S8XB-SVX001-1B-EN

Outline Drawing

S8XB-SVX001-1B-EN

Wiring Diagrams

GR/8 BURNER BOX GND YL
FLAME PROBE

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. FOR PROPER AIRFLOW IN COOLING/HEAT PUMP MODE, “Y1” ON THE THERMOSTAT MUST BE CONNECTED TO “Y1”

OF THE IFC. SEE IOM FOR FIELD WIRING.

3. THE INDOOR BLOWER MOTOR AIRFLOW TABLES ARE LOCATED IN THE IOM. TO CHANGE AIRFLOW USE

THE MENU/OPTIONS BUTTONS. 4. LINE CHOKE AND WIRE BK/28 ONLY USED ON MODELS WITH 1 HP MOTORS.

S8B1

5. FLAME SENSE TEST PADS: 1 VDC = 1 MICROAMP. FLAME CURRENT CAN VARY DEPENDING ON THE VOM THAT IS USED

AND THE VOLTAGE SUPPLIED TO THE FURNACE. THE ACCEPTABLE RANGE IS 0.75-3 MICROAMPS.

ALTERNATE WIRING DIAGRAM – BLOWER MOTOR

6. IF APPLICABLE CONNECTION FOR FACTORY PROGRAMMING ONLY.

BL/90 BK/85 GR/BK/91 WH/83

3 G BLOWER MOTOR

FLAME_ROLLOUT1

YL/50

YL/48

BLOWER HOUSING
GND

SEE NOTE 6

RD/WH/88

TO BURNER BOX HARN
YL/47 1 1 YL/48 2 2 YL/49

FLAME_ROLLOUT2

YL/50

YL/51

THERMAL_LIMIT

YL/96

YL/WH/86
BL/WH/87
BK/WH/84 OR/WH/89

1 2 3 4 5 6 7 8 9 10 11 12

YL/47 YL/46

PS
GAS VALVE
MV C

YL/49

YL/51

YL/95 RAF-1

YL/96
YL/45 RAF-2
YL/45

BLOWER HOUSING
GND BK/39
WH/40

COM 6

1 2

L G

REGAL® -ENSITE BLOWER

4 3

3 N

MOTOR

BL/42

YL/44

YL/43

RD/WH/35 YL/WH/36

BL/WH/37

YL/3 OR/11 RD/9 BL/5

TNS

BL/2

WH/15

24v

120v

WH/40 BK/39 BL/42

BK/WH/38
OR/WH/55 120v 60 Hz. 1 PH POWER SUPPLY PER LOCAL CODE

RD/6

BK/14

1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12

JUNCTION BOX

HN GND

YL/46 YL/52 WH/16 BK/28 BL/57 RD/WH/23 YL/WH/24 BL/WH/25 BK/WH/26 OR/WH/56

LINE CHOKE

SEE NOTE 4
BK/28

GR/YL/31 GR/YL/31
BK/29
WH/17

SEE NOTE 5

BK/27

BK/13 BK/14 WH/15 WH/16

321 LINE
321

WH/17
4321 NEUTRAL
4321

BK/30 2 2 BK/13 1 1 BK/29
PANEL LOOP

BUTT SPLICE-WITH HEAT SHRINK

SEE NOTE 1

BK/92 S1

VENT MOTOR

2
WH/93 3

(INDUCER) **

LINE-N (blocked) CIRC-N TNS-N
TNS-H CIRC-H LINE-H

YL/3 RD/9

HLI

IGN-N IND-N IND-H IGN-H

4 WH/21 3 WH/20 2 BK/18 1 BK/22

BUTT SPLICE-WITH HEAT SHRINK SEE NOTE 1
WH/21 1 BK/22 2
IGN

GND

RD/6

BL/5

MVC

YL/52

HLO

OR/11

BL/2

ILI (NOT USED)

MENU OPTION

TAP1

1 RD/WH/23

TAP2

2 YL/WH/24

TAP3

3 BL/WH/25

TAP4

4 BK/WH/26

TAP5

5 OR/WH/56

GND

6 BL/57

FLAME_PROBE WH/12

IFC

BK BLACK WH WHITE YL YELLOW OR ORANGE GR GREEN BR BROWN RD RED BL BLUE
IGN HOT SURFACE IGNITER

LINE

FACTORY

24 V

WIRING

ALTERNATE

LINE

FIELD

24 V

WIRING

FUSE

RAF REVERSE AIR FLOW

LC LINE CHOKE

W R G B/C Y/Y1 THERMOSTAT
SEE NOTE 2
FRS FLAME ROLLOUT SWITCH FP FLAME PROBE

PS PRESSURE SWITCH

GROUND

1 Stage Inducer with CTM Blower Motor

** INTERNAL THERMAL PROTECTION

H LINE N NEUTRAL GND GROUND HLO HIGH LIMIT
OUTPUT HLI HIGH LIMIT
INPUT PS PRESSURE SWITCH
INPUT IND INDUCER IFC INTEGRATED
FURNACE CONTROL RAF REVERSE AIR FLOW
TH 24VAC (HOT) TR 24VAC (COMMON) MVC MAIN VALVE
COMMON MV MAIN VALVE TNS TRANSFORMER ILI INDUCER LIMIT
INPUT IGN IGNITER FP FLAME PROBE

INTEGRATED FURNACE CONTROL
ELECTRICAL RATING INPUT: 24VAC, 60 HZ. TNS SEC. CURRENT: 450MA.
+ MV LOAD MV OUTPUT: 1.5A @ 24 VAC IND OUTPUT: 2.2 FLA, 3.5 LRA
@120 VAC IGN OUTPUT: 2.0 A @ 120 VAC CIRC. BLOWER OUTPUT: 14.5 FLA, 25 LRA @ 120 VAC HUMIDIFIER & AIR CLEANER
(DRY CONTACTS) MAX. LOAD: 1.0A @ 120VAC 24 VAC OR 120 VAC MAY BE USED FUSE: 5A
TIMINGS PREPURGE: 0 SEC. INTERPURGE: 60 SEC. POST PURGE: 5 SEC. IGN WARMUP: 20 SEC. IAP: 3; TFI: 5 SEC. RETRIES: 2 RECYCLES: 10 HEAT ON DELAY: UP TO 30 SEC. COOL ON DELAY: 0 SEC. AUTO RESTART: 60 MIN. AUTO RESTART PURGE: 60 SEC.

Status Codes
IdL Idle Ht Heating tP Blower Tap Number COF Continuous Fan CP1 Cooling/Heat Pump Mode dft Defrost Mode
Menu Options
Orn Orientation Err Active Alarm Menu L6F Last 6 Faults (To Clear,
Hold Option Button 5 sec)

COF Blower Tap for Continuous Fan COP C1. Blower Tap for Compressor Mode HtP H1. Blower Tap for Heating Mode rUn Run Test Mode
Error Codes E01 Loss of IRQ or internal failures E2.1 Retry exceeded (Failed to est flame) E2.2 Recycles exceeded (loss of
established flame or PS open x10)
E2.3 Gas Valve not energized when it should be exceeded after 10 times
E3.1 Shorted Pressure Switch

E05 E6.1 E6.2 E6.3

Flame detected, should not be present Voltage reversed polarity
Bad Grounding
(1) Igniter relay fails (2) Igniter open

E7.1 Gas valve is energized whenit should be off
E08 Flame current is low, but still strong enough to allow operation

E11 (1) Gas valve not energized (2) Gas valve relay stuck closed

E12 Open fuse

Cr Code Release Number

E3.2 Open Pressure Switch

COd Cooling Off Delay (sec) HOd Heat Off Delay (sec)

E04 Open Thermal Limit, Rollout Switch, or Reverse Airflow Switch

D346340P01 REV H

YL/95 WH/83 BK/85 BL/90 BL/58
GR/YL GR/YL BK WH

120v 60 Hz. 1 PH POWER SUPPLY PER LOCAL CODE

JUNCTION BOX

HN GND

S8B1

IFC

PANEL LOOP

BK 1 1 BK

LINE CHOKE

BK BK

LINE-H 3 CIRC-H 2 TNS-H 1

BK BK
BK

TNS-N 4 CIRC-N 3

WH WH

LINE-N 1

IGN-H 1 IND-H 2 IND-N 3 IGN-N 4

BK BK WH WH

TAP1 1 TAP2 2 TAP3 3 TAP4 4 TAP5 5 GND 6

RD/WH YL/WH BL/WH BK/WH OR/WH BL

ILI 1 TR 2 PS 3 HLO 4 MVC 5 TH 6 GND 7 MV 8 HLI 9 FP 10

BL OR YL BL RD GR RD YL WH

VENT

MOTOR

(INDUCER)

REGAL®

IGN WH BK

BLOWER HOUSING GND

ENSITE
——-BLOWER MOTOR

RD/WH 1

YL/WH 2

BL/WH 3

BK/WH

OR/WH

BL COM

TNS WH

24v

120v

BLOWER TO: IFC CIRC-N-3 WH

HOUSING

GR/BK

GND

TO: LINE CHOKE BK

TO: IFC GND-6 BL

TO: IFC TAP1-1 RD/WH TO: IFC TAP2-2 YL/WH TO: IFC TAP3-3 BL/WH TO: IFC TAP4-4 BK/WH TO: IFC TAP5-5 OR/WH

RD MV
BL C GAS VALVE

BURNER BOX GND

N G L C
ALTERNATE ——BLOWER
MOTOR
1 2 3 4 5

W R G B/C Y/Y1 THERMOSTAT

FLAME_ROLLOUT2 RAF-2

THERMAL_LIMIT

RAF-1

FLAME_ROLLOUT1 YL

PS OR
YL

DEFAULT BLOWER MOTOR TAP SELECTIONS
COF (CONSTANT FAN): TAP 1 COP (COOLING / HP): TAP 7 HT ( GAS HEAT): TAP 5

S8XB-SVX001-1B-EN

Wiring Diagrams

BURNER BOX GND GR/8
YL FLAME PROBE

NOTES:

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. WIRES 12, 18, 20, 48, 49, 50, 51, 92, 93 MUST BE RATED TO 250°C.

2. COOLING / HEAT PUMP SYSTEMS – Y1 AND/OR Y2 MUST CONNECT FROM THE THERMOSTAT TO THE IFC LOW

VOLTAGE TERMINALS FOR PROPER AIRFLOW. SEE IOM FOR FIELD WIRING.

3. THE INDOOR BLOWER MOTOR AIRFLOW TABLES ARE LOCATED IN THE IOM. TO CHANGE AIRFLOW USE THE MENU/OPTIONS BUTTONS.
4. LINE CHOKE AND WIRE BK/28 ONLY USED ON MODELS WITH 1 HP MOTORS.

S8X1

5. FLAME SENSE TEST PADS: 1 VDC = 1 MICROAMP. FLAME CURRENT CAN VARY

DEPENDING ON THE VOM THAT IS USED AND THE VOLTAGE SUPPLIED TO

THE FURNACE. THE ACCEPTABLE RANGE IS 0.75-3 MICROAMPS.

TO BURNER

FLAME_ROLLOUT1

YL/50

YL/48

BOX HARN

YL/47 1 1 YL/48

FLAME_ROLLOUT2

YL/46 2 2 YL/49

YL/50

YL/51

PS GAS VALVE
MV C

YL/47

RAF-1

YL/45

RAF-2

YL/45

BLOWER HOUSING GND

BK/39

WH/40

THERMAL_LIMIT

YL/49

YL/51

COM 6

BLOWER

MOTOR

BL/42

YL/3 OR/11

RD/9 BL/5

BL/2 RD/6

TNS WH/15

24v

120v

BK/14

SEE NOTE 4

LINE CHOKE

BK/28

YL/46 YL/52 WH/16 BK/28 BL/57 RD/WH/23 YL/WH/24 BL/WH/25 BK/WH/26 OR/WH/56

YL/44 YL/43 WH/40 BK/39 BL/42 RD/WH/35

1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12

YL/WH/36 BL/WH/37 BK/WH/38
OR/WH/55

120v 60 Hz. 1 PH POWER SUPPLY PER LOCAL CODE

JUNCTION BOX

HN GND

GR/YL/31 GR/YL/31 BK/29 WH/17

BK/27

BK/30 2 2 BK/13 1 1 BK/29
PANEL LOOP

BK/13 BK/14 WH/15 WH/16

WH/17

EAC HUM
24 / 120 VAC MAY BE USED

321 LINE
321

4321 NEUTRAL
4321

BUTT SPLICE-WITH HEAT SHRINK SEE NOTE 1

BK/92 1

WH/93 1

VENT MOTOR (INDUCER)
**

LINE-N (blocked) CIRC-N TNS-N
TNS-H CIRC-H LINE-H

SEE NOTE 6

YL/3 RD/9

HLI

IGN-N IND-N IND-H IGN-H

4 WH/21 3 WH/20 2 BK/18 1 BK/22

BUTT SPLICE-WITH HEAT SHRINK SEE NOTE 1
WH/21 1 BK/22 2
IGN

GND

RD/6

BL/5

MVC

YL/52

HLO

OR/11

BL/2

ILI (NOT USED)

MENU OPTION

TAP1

1 RD/WH/23

TAP2

2 YL/WH/24

TAP3

3 BL/WH/25

TAP4

4 BK/WH/26

TAP5

5 OR/WH/56

GND

6 BL/57

FLAME_PROBE WH/12

IFC

BK BLACK WH WHITE YL YELLOW OR ORANGE

GR GREEN BR BROWN RD RED BL BLUE

IGN HOT SURFACE IGNITER

LINE 24 V LINE 24 V
FUSE

W R G B/C Y/Y1 Y2 THERMOSTAT
FACTORY SEE NOTE 2 WIRING FIELD WIRING
FRS FLAME ROLLOUT SWITCH

RAF REVERSE AIR FLOW

LC LINE CHOKE

FP FLAME PROBE

PS PRESSURE SWITCH

GROUND

1 Stage Inducer with CTM Blower Motor

** INTERNAL THERMAL PROTECTION

H LINE N NEUTRAL GND GROUND HLO HIGH LIMIT
OUTPUT HLI HIGH LIMIT
INPUT PS PRESSURE SWITCH
INPUT IND INDUCER IFC INTEGRATED
FURNACE CONTROL RAF REVERSE AIR FLOW
TH 24VAC (HOT) TR 24VAC (COMMON) MVC MAIN VALVE
COMMON MVC MAIN VALVE TNS TRANSFORMER ILI INDUCER LIMIT
INPUT IGN IGNITER FP FLAME PROBE

Status Codes

HOd Heat Off Delay (sec)

E3.1 Shorted Pressure Switch

IdL Idle

COF Blower Tap for Continuous Fan

E3.2 Open Pressure Switch

Ht Heating tP Blower Tap Number

COP C1. Blower Tap for 1st Stage Compressor Mode

E04 Open Thermal Limit, Rollout Switch, or Reverse Airflow Switch

COF Continuous Fan CP1 Cooling/Heat Pump Mode

C2. Blower Tap for 2nd Stage Compressor Mode

E05 Flame detected, should not be present E6.1 Voltage reversed polarity

dft Defrost Mode

HtP H1. Blower Tap for Heating Mode

E6.2 Bad Grounding

Menu Options Orn Orientation

r U n Run Test Mode Error Codes

E6.3 (1) Igniter relay fails (2) Igniter open

Err Active Alarm Menu L6F Last 6 Faults (To Clear,
Hold Option Button 5 sec) Cr Code Release Number COd Cooling Off Delay (sec) OdU Outdoor Unit

E01 Loss of IRQ or internal failures E2.1 Retry exceeded (Failed to est flame) E2.2 Recycles exceeded (loss of
established flame or PS open x10)
E2.3 Gas Valve not energized when it should be exceeded after 10 times

E7.1 Gas valve is energized whenit should be off

E08 Flame current is low, but still strong enough to allow operation

E11 (1) Gas valve not energized (2) Gas valve relay stuck closed

E12 Open fuse

D345844P01 REV F

120v 60 Hz. 1 PH POWER SUPPLY PER LOCAL CODE

JUNCTION BOX

HN GND

S8X1

GR/YL GR/YL BK WH

IFC

PANEL LOOP

LINE CHOKE

BK BK

LINE-H 3

CIRC-H 2

TNS-H 1

TNS-N 4 CIRC-N 3

WH WH

LINE-N 1

IGN-H 1 IND-H 2 IND-N 3 IGN-N 4

BK BK WH WH

TAP1 1 TAP2 2 TAP3 3 TAP4 4 TAP5 5 GND 6

RD/WH YL/WH BL/WH BK/WH OR/WH BL

ILI 1 TR 2 PS 3 HLO 4 MVC 5 TH 6 GND 7 MV 8 HLI 9 FP 10

BL OR YL BL RD GR RD YL WH

VENT

MOTOR

(INDUCER)

IGN WH BK

BLOWER MOTOR

RD/WH 1

YL/WH 2

BL/WH 3

BK/WH

OR/WH

BL COM

TNS WH

24v

120v

C GAS

VALVE

BURNER BOX GND

W R G B/C Y/Y1 Y2 THERMOSTAT

FLAME_ROLLOUT2 YL

THERMAL_LIMIT YL

RAF-2

RAF-1

FLAME_ROLLOUT1 YL

PS OR
YL

DEFAULT BLOWER MOTOR TAP SELECTIONS
COF (CONSTANT FAN): TAP 1 CP1 (FIRST STAGE COOLING): TAP 3 CP2 (SECOND STAGE COOLING): TAP 7 HT (GAS HEAT): TAP 5

S8XB-SVX001-1B-EN

Wiring Diagrams

BURNER BOX GND GR/8
YL FLAME PROBE

NOTES:

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. WIRES 12, 18, 48, 49, 50, 51, 92, 93, AND 94 REQUIRE A TEMPERATURE RATING OF AT LEAST 250°C.

2. FOR PROPER AIRFLOW IN COOLING/HEAT PUMP MODES, Y1AND/OR Y2 MUST CONNECT FROM THE THERMOSTAT TO THE IFC LOW VOLTAGE TERMINAL STRIP.

3. FOR COOLING ONLY SYSTEMS, LEAVE Y1-O JUMPER IN PLACE ON THE IFC FOR CORRECT LED READOUT.

4. FOR HEAT PUMP SYSTEMS, REMOVE THE Y1-O JUMPER, CONNECT “O” FROM THE THERMOSTAT TO “O” ON THE IFC LOW VOLTAGE TERMINAL

STRIP FOR CORRECT LED READOUT.

5. IF USING A SINGLE STAGE HEATING THERMOSTAT, JUMPER W1 AND W2 TERMINALS AT THE LOW VOLTAGE TERMINAL STRIP. HT2 WILL

BE SHOWN ON THE SEVEN SEGMENT DISPLAY AT ALL TIMES. SECOND STAGE OPERATION WILL BEGIN AFTER THE INTERSTAGE DELAY HAS COMPLETED.

6. AIRFLOW TABLES ARE LOCATED IN THE IOM. TO CHANGE AIRFLOW, REFER TO THE INTEGRATED FURNACE CONTROL MENU AND OPTIONS

TO SET AIRFLOW AND BLOWER DELAYS.

7. LINE CHOKE AND WIRE BK/28 ONLY USED ON MODELS WITH 1 HP MOTORS.

8. WIRE YL/45 AND RAF-2 ARE NOT PRESENT ON DOWNFLOW MODELS.

9. FLAME SENSE TEST PADS: 1 VDC = 1 MICROAMP. FLAME CURRENT CAN VARY DEPENDING ON THE VOM THAT IS USED AND THE VOLTAGE SUPPLIED TO THE FURNACE. THE ACCEPTABLE RANGE IS 0.75-3 MICROAMPS.

FLAME_ROLLOUT1

YL/50

YL/48

S8X2

YL/47

PS2

GAS VALVE
123

PS1

YL/47 1 1 YL/48

YL/46

2 2 YL/49

RAF-1

TO BURNER BOX HARN
YL/45

*SEE NOTE RAF-2 8
YL/45

BLOWER HOUSING GND

BK/39 WH/40

1L 2G 3N

FLAME_ROLLOUT2

YL/50

YL/51

THERMAL_LIMIT

YL/49

YL/51

COM 6

BLOWER

MOTOR

BL/42

YL/3 OR/11

BR/10

BL/5

RD/9

YL/3 BR/53 BR/7

BL/2 RD/6

TNS WH/15

24v

120v

BK/14

SEE NOTE 7

LINE CHOKE

BK/28

YL/46 YL/52 WH/16 BK/28 BL/57 RD/WH/23 YL/WH/24 BL/WH/25 BK/WH/26 OR/WH/56

YL/44 YL/43 WH/40 BK/39 BL/42 RD/WH/35

1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12

YL/WH/36 BL/WH/37 BK/WH/38 OR/WH/55

120v 60 Hz. 1 PH POWER SUPPLY PER LOCAL CODE

JUNCTION BOX

HN GND

GR/YL/31 GR/YL/31 BK/29 WH/17

BK/27

BK/30

2 2 BK/13 1 1 BK/29

PANEL LOOP

BK/13 BK/14 WH/15 WH/16

WH/17

EAC HUM

321 LINE

4321 NEUTRAL

BUTT SPLICE-WITH HEAT SHRINK SEE NOTE 1

LINE-N (blocked) CIRC-N TNS-N
TNS-H CIRC-H LINE-H

24 / 120 VAC 3 2 1 MAY BE USED

4 3 21

BK/92 S1

VENT MOTOR (INDUCER)
**

SEE NOTE 9 FP

BUTT SPLICE-WITH HEAT SHRINK SEE NOTE 1

IGN-N

5 WH/21

WH/21 1

IND-N

4 WH/20

BK/22 2

BR/53

HLI

IND-LO

3 RD/19

IGN

BR/10

MVH

IND-HI

2 BK/18

RD/9

MVL

IGN-H

1 BK/22

GND

BR/7 RD/6

PS2

MENU OPTION

TAP1

1 RD/WH/23

TAP2

2 YL/WH/24

BL/5

MVC

TAP3

3 BL/WH/25

YL/52

HLO

TAP4

4 BK/WH/26

OR/11

PS1

TAP5

5 OR/WH/56

BL/2

ILI (NOT USED)

GND

6 BL/57

FLAME_PROBE WH/12

BK BLACK WH WHITE YL YELLOW

LINE FACTORY 24 V WIRING
LINE FIELD 24 V WIRING

IFC

OR ORANGE

GR GREEN BR BROWN RD RED BL BLUE

IGN HOT SURFACE IGNITER
RAF REVERSE AIR FLOW

2 Stage Inducer with CTM Blower Motor

W2 W1 R G B/C Y2 Y1 O THERMOSTAT
SEE NOTES 2, 3, 4, 5

PS PRESSURE SWITCH

FRS FLAME ROLLOUT SWITCH

FUSE

FP FLAME PROBE

LC LINE CHOKE

GROUND

** INTERNAL THERMAL PROTECTION

H LINE N NEUTRAL GND GROUND HLO HIGH LIMIT OUTPUT HLI HIGH LIMIT INPUT PS1 1ST STAGE PRESSURE
INPUT PS2 2ND STAGE PRESSURE
INPUT IND INDUCER IFC INTEGRATED FURNACE
CONTROL RAF REVERSE AIR FLOW TH 24VAC (HOT) TR 24VAC (COMMON) MVC VALVE COMMON MVL VALVE LOW STAGE MVH VALVE HIGH STAGE TNS TRANSFORMER ILI INDUCER LIMIT INPUT IGN IGNITER FP FLAME PROBE HI SECOND STAGE LO FIRST STAGE

INTEGRATED FURNACE CONTROL
ELECTRICAL RATING INPUT: 24 VAC, 60 HZ. TNS SEC. CURRENT: 450 MA.
+ MV LOAD MV OUTPUT: 1.5A @ 24 VAC IND OUTPUT: 2.2 FLA, 3.5 LRA
@ 120 VAC IGN OUTPUT: 2.0 A @ 120 VAC CIRC. BLOWER OUTPUT: 14.5 FLA,
25 LRA @ 120 VAC HUMIDIFIER @& AIR CLEANER
(DRY CONTACTS) MAX. LOAD: 1.0 A @ 120 VAC 24 VAC OR 120 VAC MAY BE USED FUSE: 5A
TIMINGS PREPURGE: 0 SEC. INTERPURGE: 60 SEC. POST PURGE: 5 SEC. IGN WARMUP: 20 SEC. IAP: 3; TFI: 5 SEC. RETRIES: 2 RECYCLES: 10 HEAT ON DELAY: 30 SEC. COOL ON DELAY: 0 SEC. AUTO RESTART: 60 MIN. AUTO RESTART PURGE: 60 SEC.

Status Codes IdL Idle Ht1 1st Stage Heating Ht2 2nd Stage Heating tP Blower Tap Number COF Continuous Fan CL1 1st Stage Cooling CL2 2nd Stage Cooling HP1 1st Stage Heat Pump HP2 2nd Stage Heat Pump dft Defrost Mode
Menu Options
Orn Orientation Err Active Alarm Menu L6F Last 6 Faults (To Clear,
Hold Option Button 5 sec)
Cr Code Release Numbe r COd Cooling Off Delay (sec) OdU Outdoor Unit Type

H O d Heat Off Delay (sec) Is d Inter-Stage Delay C O P C1. Blower Tap for 1st Stage
Compressor Mode
C.2. Blower Tap for 2nd Stage Compressor Mode
HtP H1. Blower Tap for 1st Stage Heating H.2. Blower Tap for 2nd dtage Heating
r U n Run Test Mode Error Codes
E01 Loss of IRQ or internal failures E2.1 Retry exceeded (Failed to est flame) E2. 2 Recycles exceeded (loss of established
flame or PS open x10)
E2. 3 1st Stage Gas Valve not energized when it should be exceeded after 10 times
E3.1 Shorted Pressure Switch, 1st Stage E3. 2 Open Pressure Switch, 1st Stage E3. 3 Shorted Pressure Switch, 2nd Stage

E3. 4 Open Pressure Switch, 2nd Stage E04 Open Thermal Limit, Rollout Switch, or Reverse Airflow Switch E05 Flame detected, should not be present E6.1 Voltage reversed polarity E6. 2 Bad Grounding
E6. 3 (1) Igniter relay fails (2) Igniter open
E7.1 1st stage gas valve (MVL) is energized when it should be of f
E08 Flame current is low, but still strong enough to allow operation E09 Open Inducer Limit Switch or Condensate Switch E11 (1) 1st stage gas valve not energized when it should be
(2) 1st stage gas valve relay stuck closed (3) 2nd stage gas valve relay stuck closed (4) 2nd stage gas valve energized
when it should not be
(5) 2nd stage gas valve not energized when it should be

E12 Open fuse

D345847P01 REV E

120v 60 Hz. 1 PH POWER SUPPLY PER LOCAL CODE

JUNCTION BOX

HN GND

S8X2

GR/YL GR/YL
BK WH

IFC

LINE-H 3

CIRC-H 2

TNS-H 1

TNS-N 4 CIRC-N 3

WH WH

LINE-N 1

IGN-H 1 IND-HI 2 IND-LO 3 IND-N 4 IGN-N 5

BK BK RD WH WH

TAP1 1 TAP2 2 TAP3 3 TAP4 4 TAP5 5 GND 6

RD/WH YL/WH BL/WH BK/WH OR/WH BL

ILI 1 TR 2 PS1 3 HLO 4 MVC 5 TH 6 PS2 7 GND 8 MVL 9 MVH 10 HLI 11 FP 12

BL OR YL BL RD BR GR RD BR BR WH

PANEL LOOP

BK 1 1 BK

LINE CHOKE

BK BK

VENT

MOTOR

(INDUCER)

IGN WH BK

BLOWER MOTOR

RD/WH 1

YL/WH 2

BL/WH 3

BK/WH

OR/WH

BL COM

TNS WH

24v

120v

RD 1

BL BR

GAS VALVE

BURNER BOX GND

W2 W1 R G B/C Y2 Y1 O THERMOSTAT

FLAME_ROLLOUT2 YL

THERMAL_LIMIT YL

RAF-2

RAF-1

PS2 BR

FLAME_ROLLOUT1 YL

PS1 OR
YL

DEFAULT BLOWER MOTOR TAP SELECTIONS
COF (CONSTANT FAN): TAP 1 CL1 (FIRST STAGE COOLING): TAP 3 CL2 (SECOND STAGE COOLING): TAP 7 HT1 (FIRST STAGE HEAT): TAP 2 HT2 (SECOND STAGE HEAT): TAP 5

S8XB-SVX001-1B-EN

Airflow Tables

Model
S81A040M3PSC S8X2A040M3PSC
Model
S81B040M2PSC
Model
S81B060M4PSCA S81B060M4PSCB S8X2B060M4PSC
Model
S81B080M4PSCA S81B080M4PSCB S8X2B080M4PSC

Furnace Airflow (CFM) Vs. External Static Pressure (in. W.C.)

Tap

Static

0.1

0.3

0.5

SCFM / Watts

592 / 40

342 / 43

93 / 46

SCFM / Watts

666 / 48

467 / 56

268 / 65

SCFM / Watts

687 / 49

493 / 59

299 / 69

SCFM / Watts

938 / 100

788 / 111

638 / 123

SCFM / Watts 1006 / 119

870 / 131

733 / 144

SCFM / Watts 1068 / 140

944 / 154

820 / 167

SCFM / Watts 1174 / 181

1066 / 196

957 / 211

SCFM / Watts 1167 / 194

1098 / 219 1029 / 244

SCFM / Watts 1556 / 398

1474 / 416 1392 / 435

Furnace Airflow (CFM) Vs. External Static Pressure (in. W.C.)

Tap

Static

0.1

0.3

0.5

SCFM / Watts

526 / 34

SCFM / Watts

744 / 54

533 / 63

322 / 72

SCFM / Watts

820 / 68

662 / 81

504 / 94

SCFM / Watts

967 / 97

811 / 110

654 / 122

SCFM / Watts

997 / 104

840 / 116

687 / 129

SCFM / Watts 1052 / 119

911 / 133

771 / 148

SCFM / Watts 1099 / 134

968 / 150

837 / 165

SCFM / Watts 1168 / 157

1047 / 174

926 / 191

SCFM / Watts 1303 / 214

1196 / 233 1088 / 252

Furnace Airflow (CFM) Vs. External Static Pressure (in. W.C.)

Tap

Static

0.1

0.3

0.5

SCFM / Watts

596 / 38

287 / 42

SCFM / Watts

851 / 70

667 / 81

483 / 92

SCFM / Watts 1142 / 141

1018 / 156

893 / 172

SCFM / Watts 1196 / 160

1079 / 176

961 / 192

SCFM / Watts 1362 / 220

1258 / 239 1154 / 257

SCFM / Watts 1416 / 250

1319 / 269 1221 / 288

SCFM / Watts 1495 / 287

1402 / 307 1309 / 327

SCFM / Watts 1574 / 337

1487 / 357 1401 / 378

SCFM / Watts 1983 / 659

1899 / 670 1815 / 680

Furnace Airflow (CFM) Vs. External Static Pressure (in. W.C.)

Tap

Static

0.1

0.3

0.5

SCFM / Watts

552 / 34

160 / 34

SCFM / Watts

891 / 82

720 / 93

549 / 105

SCFM / Watts 1123 / 141

996 / 157

869 / 173

SCFM / Watts 1344 / 224

1240 / 224 1136 / 263

SCFM / Watts 1479 / 290

1384 / 312 1290 / 333

SCFM / Watts 1583 / 354

1496 / 376 1408 / 398

SCFM / Watts 1654 / 405

1572 / 428 1491 / 451

SCFM / Watts 1818 / 542

1739 / 561 1661 / 581

SCFM / Watts 1926 / 645

1841 / 656 1756 / 667

0.7
70 / 74 105 / 78 488 / 134 597 / 156 696 / 181 848 / 226 960 / 269 1310 / 453
0.7
110 / 81 346 / 106 498 / 135 533 / 142 630 / 162 706 / 180 805 / 208 981 / 271
0.7
299 / 102 769 / 187 844 / 208 1050 / 276 1124 / 307 1216 / 347 1314 / 399 1730 / 691
0.7
378 / 117 742 / 189 1033 / 283 1196 / 354 1321 / 420 1409 / 474 1582 / 600 1670 / 679

0.9
338 / 146 461 / 169 573 / 194 740 / 241 891 / 294 1228 / 471
0.9
188 / 119 341 / 148 380 / 154 490 / 176 575 / 196 684 / 225 874 / 290
0.9
115 / 113 644 / 203 726 / 224 946 / 294 1026 / 327 1123 / 367 1228 / 420 1646 / 701
0.9
207 / 129 615 / 205 929 / 302 1102 / 375 1234 / 442 1327 / 496 1503 / 619 1585 / 690

S8XB-SVX001-1B-EN

Airflow Tables

Model
S81C080M5PSC S8X2C080M5PSC
Model
S81C100M5PSCB S8X2C100M5PSC
Model
S8*1D120M5PSC S8X2D120M5PSC

Furnace Airflow (CFM) Vs. External Static Pressure (in. W.C.)

Tap

Static

0.1

0.3

0.5

SCFM / Watts

728 / 44

358 / 49

SCFM / Watts

809 / 53

540 / 63

271 / 74

SCFM / Watts 1440 / 185

1273 / 201 1105 / 218

SCFM / Watts 1536 / 220

1385 / 238 1233 / 257

SCFM / Watts 1689 / 278

1552 / 299 1414 / 320

SCFM / Watts 1792 / 326

1661 / 348 1530 / 371

SCFM / Watts 1899 / 373

1771 / 397 1643 / 422

SCFM / Watts 2094 / 500

1985 / 527 1875 / 554

SCFM / Watts 2533 / 931

2414 / 932 2295 / 933

Furnace Airflow (CFM) Vs. External Static Pressure (in. W.C.)

Tap

Static

0.1

0.3

0.5

SCFM / Watts

821 / 55

442 / 55

SCFM / Watts 1359 / 163

1195 / 180 1031 / 198

SCFM / Watts 1602 / 246

1461 / 268 1321 / 290

SCFM / Watts 1807 / 336

1678 / 362 1550 / 388

SCFM / Watts 1827 / 345

1700 / 371 1572 / 398

SCFM / Watts 1925 / 395

1800 / 423 1675 / 451

SCFM / Watts 2102 / 503

1985 / 534 1869 / 566

SCFM / Watts 2222 / 602

2115 / 635 2008 / 667

SCFM / Watts 2458 / 896

2351 / 913 2245 / 930

Furnace Airflow (CFM) Vs. External Static Pressure (in. W.C.)

Tap

Static

0.1

0.3

0.5

SCFM / Watts 1469 / 184

912 / 126

355 / 68

SCFM / Watts 1429 / 175

1165 / 171

900 / 168

SCFM / Watts 1567 / 215

1401 / 232 1235 / 248

SCFM / Watts 1858 / 334

1731 / 361 1605 / 388

SCFM / Watts 2004 / 418

1890 / 447 1776 / 476

SCFM / Watts 2110 / 488

2004 / 518 1898 / 549

SCFM / Watts 2245 / 596

2148 / 629 2052 / 662

SCFM / Watts 2440 / 765

2345 / 794 2250 / 824

SCFM / Watts 2536 / 882

2431 / 904 2325 / 927

0.7
938 / 234 1081 / 275 1277 / 342 1400 / 394 1515 / 446 1766 / 582 2176 / 933
0.7
868 / 215 1180 / 312 1421 / 414 1444 / 425 1550 / 479 1752 / 597 1901 / 700 2138 / 947
0.7
636 / 164 1069 / 264 1478 / 415 1662 / 505 1792 / 580 1956 / 695 2155 / 854 2220 / 949

0.9
770 / 250 929 / 293 1140 / 363 1269 / 417 1387 / 471 1656 / 609 2058 / 934
0.9
704 / 233 1040 / 334 1292 / 440 1317 / 451 1425 / 508 1635 / 628 1794 / 732 2032 / 964
0.9
371 / 160 903 / 280 1351 / 441 1548 / 534 1686 / 611 1860 / 729 2060 / 884 2114 / 972

S8XB-SVX001-1B-EN

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

Model

500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400

S8*1A040M3PSC 59 49 42 37 33 30

S8*1B040M2PSC 59 49 42 37 33 30

S8*1B060M4PSCA/B

56 49 44 40 37 34 32

S8*1B080M4PSCA/B

59 54 49 46 42 40 37 35 33

S8*1C080M5PSC

59 54 49 46 42 40 37 35 33

S8*1C100M5PSCB

57 53 49 46 44 41 39 37 35 34 32 31

S8*1D120M5PSC

59 56 52 49 47 44 42 40 39 37

Table 3. S8X2 — Low Heat

Model

CFM Versus Temperature Rise — First Stage (Low) Heating 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000

S8X2A040M3PSC

48 39 32 28

S8X2B060M4PSC

56 47 40 35 31 28

S8X2B080M4PSC

55 48 43 39 35

S8X2C080M5PSC

55 48 43 39 35

S8X2C100M5PSC

60 53 48 44

34 32 30

S8X2D120M5PSC

44 41 39 37 35 33

Table 4. S8X2 — High Heat

Model

CFM Versus Temperature Rise — Second Stage (High) Heating 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400

S8X2A040M3PSC

59 49 42 37 33 30

S8X2B060M4PSC

56 49 44 40 37 34 32

S8X2B080M4PSC

59 54 49 46 42 40 37 35 33

S8X2C080M5PSC S8X2C100M5PSC

59 54 49 46 42 40 37 35 33 57 53 49 46 44 41 39 37 35 34 32 31

S8X2D120M5PSC

59 56 52 49 47 44 42 40 39 37

S8XB-SVX001-1B-EN

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 remove the four latches on the front panel.
Note: Remove the shipping bracket before installation.
Shipping bracket

Note: For the S8B1/S8X1 furnace, a 1/4″ nut driver is required to remove the two screws at the top of the front panel. The front panel can then be removed by lifting upwards.
Note: Tinnerman clips are provided in the doc pack if the door panel flange hole(s) becomes stripped.
Note: Remove the shipping bracket before installation.

Shipping bracket

Tinnerman clip locations (if needed)

Horizontal Installation in an Attic or Crawlspace
The non-condensing furnace may be installed in an attic or crawl space in the horizontal position by placing the furnace on its left or right side (as viewed from the front in the vertical position). The horizontal furnace installation in an attic should be on a service platform large enough to allow for proper clearances on all sides and service access to the front of the furnace. See the “Locations and Clearances,” p. 14. Line contact is only permissible between lines formed by intersections of the top and two sides of the furnace casing and building joists, studs, or framing.
The furnace may be placed horizontally in a crawl space on a pad or other noncombustible material. Place blocks underneath to support the furnace and raise the unit for sufficient protection from moisture.
The furnace may be installed in a hanging position using straps. The furnace should be supported at both
S8XB-SVX001-1B-EN

ends and have an additional support in the center of the furnace in back.
WHEN SUSPENDING THE HORIZONTAL FURNACE, IT SHOULD BE SUSPENDED BY ATTACHING TO THE CABINET IN THE PLACES SHOWN.
WHEN SUPPORTING THE FURNACE FROM BELOW, SUPPORT FRONT TO BACK (AS SHOWN) OR SIDE TO SIDE.
23

Furnace General Installation

Gas Piping

Important: The furnace default is left side gas piping.
Note: For ease of installation, optional accessory part PIP02095 is recommended for gas piping entering the right side of the furnace.

Furnace in upflow orientation with gas piping on left

1/8″ NPT Test Fitting

Automatic Gas Valve with Manual Shut-off

Main Manual Shut-off Valve

Ground Union Joint

Drip Leg

Furnace in upflow orientation with gas piping on right
Note: For ease of installation, optional accessory part PIP02095 is recommended for gas piping entering the right side of the furnace in the upflow orientation.

Automatic Gas Valve with Manual Shut-off

1/8″ NPT Test Fitting

Main Manual Shut-off Valve
Ground Union Joint

Drip Leg

Furnace in downflow orientation with gas piping on left
Note: For ease of installation, optional accessory part PIP02095 is recommended for gas piping entering the left side of the furnace in the downflow orientation.

Furnace in downflow orientation with gas piping on right

1/8″ NPT Test Fitting
Main Manual Shut-off Valve Ground Union Joint
Drip Leg
Automatic Gas Valve with Manual Shut-off

Automatic Gas Valve with Manual Shut-off

1/8″ NPT Test Fitting
Main Manual Shut-off Valve
Ground Union Joint
Drip Leg

S8XB-SVX001-1B-EN

Furnace General Installation

Note: For ease of installation, optional accessory part PIP02095 is recommended for gas piping entering the right side of the furnace.
Furnace in horizontal left orientation with gas piping out top
Note: For ease of installation, optional accessory part PIP02095 is recommended for gas piping entering the top of the furnace in the horizontal left position.

1/8″ NPT Main Manual Test Fitting Shut-off Valve

Ground Union Joint

Furnace in horizontal left orientation with gas piping out bottom
Automatic Gas Valve with Manual Shut-off

Drip Leg
Automatic Gas Valve with Manual Shut-off

1/8″ NPT Test Fitting

Ground Union Joint

Main Manual Shut-off Valve Drip Leg

Furnace in horizontal right orientation with gas piping out top

Drip Leg

Ground Union Joint

1/8″ NPT Test Fitting
Main Manual Shut-off Valve

Furnace in horizontal right orientation with gas piping out bottom
Note: For ease of installation, optional accessory part PIP02095 is recommended for gas piping entering the bottom of the furnace in the horizontal right position.

Automatic Gas Valve with Manual Shut-off

Automatic Gas Valve with Manual Shut-off
Main Manual Shut-off Valve

Drip Leg

Ground Union Joint

1/8″ NPT Test Fitting

S8XB-SVX001-1B-EN

Furnace General Installation

The furnace is shipped standard for left side installation of gas piping. A cutout with plug is provided on the right side for an alternate gas piping arrangement.
The installation of piping shall be in accordance with piping codes and the regulations of the local gas company. Pipe joint compound must be resistant to the chemical reaction with liquefied petroleum gases.
Important: If local codes allow the use of flexible gas appliance connector, always use a new listed connector. Do not use a connector which has previously serviced another gas appliance.
Refer to the piping table for delivery sizes. Connect gas supply to the unit, using a ground joint union and a manual shut-off valve. National codes require a condensation drip leg to be installed ahead of the gas valve.
The furnace and its individual shut-off valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa).
The furnace must be isolated from the gas supply piping by closing 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).

NATURAL GAS ONLY

TABLE OF CUBIC FEET PER HOUR OF GAS FOR VARIOUS PIPE SIZES AND LENGTHS

PIPE

LENGTH OF PIPE

SIZE

1/2

131

3/4

273 188 151 129 114 104

514 353 284 243 215 195 179

11/4 1060 726 583 499 442 400 368

This table is based on Pressure Drop of 0.3 inch W.C. and 0.6 SP. GR. Gas

Note: Maximum pressure to the gas valve for natural gas is 13.8″ W. C. Minimum pressure is 5.0″ W.C. Maximum pressure to the gas valve for propane is 13.8″ W.C. Minimum pressure is 11.0″ W.C.
All gas fittings must be checked for leaks using a soapy solution before lighting the furnace. DO NOT CHECK WITH AN OPEN FLAME!
For propane conversions use S-Series Furnaces, use BAYLPSS400* conversion kit with stainless steel burners.

INPUT RATING
BTUH
40,000 60,000 80,000 100,000 120,000

ORIFICE SIZES

NUMBER OF BURNERS

MAIN BURNER ORIFICE DRILL SIZE

NAT. GAS

PROPANE GAS

S8XB-SVX001-1B-EN

Furnace General Installation

Combustion and Input Check
1. Make sure all gas appliances are off except the furnace. 2. Clock the gas meter with the furnace operating (determine the
dial rating of the meter) for one revolution. 3. Match the “Sec” column in the gas flow table with the time
clocked. 4. Read the “Flow” column opposite the number of seconds clocked. 5. Use the following factors if necessary:
a. For 1 Cu. Ft. Dial Gas Flow CFH = Chart Flow Reading ÷ 2 b. For 1/2 Cu Ft. Dial Gas Flow CFH = Chart Flow Reading ÷ 4 c. For 5 Cu. Ft. Dial Gas Flow CFH = 10X Chart Flow Reading ÷ 4 6. Multiply the final figure by the heating value of the gas obtained from the utility company and compare to the nameplate rating. This must not exceed the nameplate rating.

Sec. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Flow 732 666 610 563 523 488 458 431 407 385 366 349 333 318 305 293 282 271 262 253 244

Gas Flow in Cubic Feet Per Hour

2 Cubic Foot Dial

Sec. Flow Sec. Flow

236

141

229

138

222

136

215

133

209

131

203

128

198

126

193

124

188

122

183

118

179

114

174

111

170

108

166

105

163

102

159

156

153

149

146

144

Sec. 86 88 90 94 98 100 104 108 112 116 120 130 140 150 160 170 180 190 200

Flow 85 83 81 78 75 73 70 68 65 63 61 56 52 49 46 43 41 39 37

S8XB-SVX001-1B-EN

Furnace General Installation

Gas Valve Adjustment
Changes can be made by adjusting the manifold pressure, or changing orifices (orifice change may not always be required). To adjust the manifold pressure:
1. Turn off all electrical power to the system.
2. Loosen (Do Not remove) the pressure tap test set screw one turn with 3/32″ hex wrench.
a. The pressure tap adjustment kit (KIT07611) contains a 3/32″ hex wrench, a 5/16″ hose and a connector and can be ordered through Global Parts.
3. Attach a manifold pressure gauge with flexible tubing to the outlet pressure boss marked “OUT P” on White- Rodgers gas valve model 36J.
4. Turn on system power with NO call for heat.
Note: 2nd stage manifold pressure should be adjusted first. To shorten the amount of time it takes for 2nd stage to be energized, set the ISD (Interstage Delay) to zero (000) using the Menu and Option buttons on the IFC. This will energize 2nd stage heating immediately after after the blower on delay from 1st stage is complete. This is ~30 seconds after 1st stage flame has been sensed.
5. Make a call for 2nd stage heating. Insure that the unit is in 2nd stage heating by verifying 24 VAC is measured between C and HI on the gas valve.
Important: Adjust 2nd stage on the gas valve before attempting to adjust 1st stage.
6. Adjust 2nd stage gas heat by removing the high (HI) adjustment regulator cover screw.
a. To increase outlet pressure, turn the regulator adjust screw clockwise.
b. To decrease outlet pressure, turn the regulator adjust screw counterclockwise.
c. Adjust regulator 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 high altitude.
d. Replace and tighten the regulator cover screw securely.
e. Remove call for second stage heat, first stage heat is now running.
7. Adjust 1st stage gas heat by removing the low (LO) adjustment regulator cover screw.
a. To increase outlet pressure, turn the regulator adjust screw clockwise.
b. To decrease outlet pressure, turn the regulator adjust screw counterclockwise.
c. Adjust regulator 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 high altitude.
d. Replace and tighten the regulator cover screw securely.
8. Cycle the valve several times to verify regulator setting.
a. Repeat steps 5-7 if needed.
9. Turn off all electrical power to the system.
10. Remove the manometer and flexible tubing and tighten the pressure tap screw.
11. Using a leak detection solution or soap suds, check for leaks at the pressure outlet boss and pressure tap test screw.
12. Turn on system power and check operation of the unit.

White-Rodgers 36J
Gas Valve On/Off Toggle Switch

Inlet Pressure Boss

Outlet Pressure Boss 2nd Stage (HI) Manifold Pressure Adjustment 1st Stage (LO) Manifold Pressure Adjustment

Gas Valve On/Off Toggle Switch

White-Rodgers 36J
Inlet Pressure Boss

Outlet Pressure Boss 1st Stage (LO) Manifold Pressure Adjustment

Maximum and Minimum INLET Pressure (inches w.c.)

Natural Gas

Propane

Maximum Minimum

13.8 5

13.8 11

Maximum and Minimum Fuel Manifold Pressure Settings (inches w. c.) 2nd Stg/1st Stg

All models except S8*1D120, S8X2D120

3.5/1.6

S8B1D120 / S8X1D120, S8X2D120

3.5/1.8

Orifice sizes for Natural Gas and Propane

10/6 10/7.5

All models

S8XB-SVX001-1B-EN

Furnace General Installation

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. (610 m).
If the installation is 2,000 ft. (610 m) or above, the Furnace input rate (BTUH) shall be reduced 4% for each 1,000 ft. above sea level.
Installations of this furnace at altitudes above 2,000 ft. (610 m) shall be made utilizing the Part Numbers for Replacement Orifices table in these installation instructions. The Furnace input rate shall be checked by clocking the gas flow rate (CFH) and multiplying by the heating value obtained from the local utility supplier for the gas being delivered at the installed altitude. Input rate changes can be made by adjusting the Manifold Pressure (min 3.0 – max 3.7 in. W.C. – Natural Gas) or changing orifices (orifice change may not always be required).
If the desired input rate can not be achieved with a change in Manifold Pressure, then the orifices must be changed. Propane installations will require an orifice change.

PART NUMBERS FOR REPLACEMENT ORIFICES

DRILL SIZE

PART NUMBER

DRILL SIZE

PART NUMBER

ORF00501

ORF00555

ORF00644

ORF00693

ORF00909

ORF00907

ORF00910

ORF00908

ORF01099

ORF01338

ORF00503

ORF01339

ORF00493

See the table for help in selecting orifices if orifice change is required. Furnace input rate and temperature rise should be checked again after changing orifices to confirm the proper rate for the altitude.

Turn the main Gas Valve toggle switch within the unit to the “OFF” position. Turn the external gas valve to “ON”. Purge the air from the gas lines. After purging, check all gas connections for leaks with a soapy solution DO NOT CHECK WITH AN OPEN FLAME. Allow 5 minutes for any gas that might have escaped to dissipate.
Propane Gas being heavier than air may require forced ventilation. Turn the toggle switch on the Gas Valve in the unit to the “ON” position.

Note: For furnaces requiring modifications other than only gas orifice and/or manifold pressure adjustment for installation at high altitude, installation of this furnace at altitudes above 200 ft (610 m) shall be made in accordance with the listed High Altitude Conversion Kit available for this furnace.

The table lists the main burner orifices used with the furnace. If a change of orifices is required to correct the furnace input rating refer to the part number for replacement orifices table.
Installation of this furnace at altitudes above 2000 ft (610m) shall be in accordance with local codes, or in the absence of local codes, the National Fuel Gas Code, ANSI Z223.1/NFPA 54.

Orifice Twist Drill
Size If Installed at Sea Level

2000

3000

Altitude Above Sea Level and Orifice Required at Other Elevations
4000 5000 6000 7000 8000

From National Fuel Gas Code — Table E.1.1(d)

9000 10000

S8XB-SVX001-1B-EN

Furnace General Installation

Table 5. High Altitude Kit
Furnace Models S81A040M3P S81B040M2P S81B060M4P S81B080M4P S81C080M5P S81C100M5P S81D120M5P S8X2A040M3P
S8X2B060M4PSAAA S8X2B060M4PSAAB & later S8X2B060M4PTAAA & later
S8X2B080M4P S8X2C080M5P S8X2C100M5P S8X2D120M5P*

Kit Model No. BAYSWT21AHALTAA BAYSWT21AHALTAA BAYSWT15AHALTAA BAYSWT15AHALTAA BAYSWT14AHALTAB BAYSWT14AHALTAB BAYSWT14AHALTAB BAYSWT22AHALTAA BAYSWT17AHALTAA BAYSWT23AHALTAA BAYSWT23AHALTAA BAYSWT18AHALTAA BAYSWT16AHALTAB BAYSWT19AHALTAA BAYSWT24AHALTAA

PS1-LOW SET PT NA NA NA NA NA NA NA
-0.25″ +/- 0.05″ WC -0.30″ +/- 0.05″ WC -0.40″ +/- 0.05″ WC -0.40″ +/- 0.05″ WC -0.37″ +/- 0.05″ WC -0.25″ +/- 0.05″ WC -0.37″ +/- 0.05″ WC
0.45″ +/ 0.05″WC

PS2-HIGH SET PT -0.47″ +/- 0.05″ WC -0.47″ +/- 0.05″ WC -0.60″ +/- 0.05″ WC -0.60″ +/- 0.05″ WC -0.50″ +/- 0.05″ WC -0.50″ +/- 0.05″ WC -0.50″ +/- 0.05″ WC -0.47″ +/- 0.05″ WC -0.60″ +/- 0.05″ WC -0.70″ +/- 0.05″ WC -0.70″ +/- 0.05″ WC -0.60″ +/- 0.05″ WC -0.50″ +/- 0.05″ WC -0.50″ +/- 0.05″ WC -0.50″ +/- 0.05″ WC

General Venting
VENT PIPING
These furnaces have been classified as Fan-Assisted Combustion System, Category I furnaces under the “latest edition” provisions of ANSI Z21.47 standards. Category I furnaces operate with a non-positive vent static pressure and with a flue loss of not less than 17 percent.
Multistory and common venting are permitted for these furnaces. Venting systems shall be in accordance

with the National Fuel Gas Code, ANSI Z223.1/NFPA 54, local codes, and this installation manual.
If desired, a side wall termination can be accomplished through the use of a listed “add-on” draft inducer. The inducer must be installed according to the inducer manufacturer’s instructions. Set the barometric pressure relief to achieve 0.02 inch water column.
The furnace shall be connected to a factory built chimney or vent complying with a recognized standard, or a masonry or concrete chimney lined with a lining material acceptable to the authority having jurisdiction.

VENTING INTO A MASONRY CHIMNEY If the chimney is oversized, the liner is inadequate, or flue-gas condensation is a problem in your area, consider using the chimney as a pathway or chase for type “B” vent or flexible vent liner. If flexible liner material is used, size the vent using the “B” vent tables, then reduce the maximum capacity by 20% (multiply 0.80 times the maximum capacity). Masonry Chimney Kit BAYVENT800B may be used with these furnaces (Upflow model furnaces only) to allow venting into a masonry chimney. Refer to the BAYVENT800B Installer’s Guide for application requirements. INTERNAL MASONRY CHIMNEYS Venting of fan assisted appliances into a lined, internal masonry chimney is allowed only if it is common vented with at least one natural draft appliance; OR, if the chimney is lined with type “B”, double wall vent or suitable flexible liner material

WARNING
Safety Hazard!
Failure to follow this warning could result in carbon monoxide poisoning or death. The chimney liner must be thoroughly inspected to insure no cracks or other potential areas for flue gas leaks are present in the liner. Liner leaks will result in early deterioration of the chimney.

The following section does not apply if BAYVENT800B (Masonry Chimney Vent Kit) is used. All instructions with the kit must be followed.

S8XB-SVX001-1B-EN

Furnace General Installation

Masonry Chimney Venting

Type Furnace

Tile Lined Chimney

Chimney Lining

Single Fan Assist

Internal No

External No

“B” Vent Yes

Flexible Metal Liner Yes (a)

Fan Assist + Fan Assist

Yes

Yes (a)

Fan Assist + Natural

Yes

Yes (a)

(a) Flexible chimney liner size is determined by using the type “B” vent size for the available BTUH input, then reducing the maximum capacity by 20% (multiply maximum capacity times 0.80). The minimum capacity is the same as shown in the “B” vent tables.

EXTERNAL MASONRY CHIMNEY Venting of fan assisted appliances into external chimneys (one or more walls exposed to outdoor temperatures), requires the chimney be lined with type “B”, double wall vent or suitable flexible chimney liner material. This applies in all combinations of common venting as well as for fan assisted appliances vented alone. The following installation practices are recommended to minimize corrosion caused by condensation of flue products in the furnace and flue gas system.
1. Avoid an excessive number of bends.
2. Horizontal runs should pitch upward at least 1/4″ per foot.
3. Horizontal runs should be as short as possible.
4. All vent pipe or connectors should be securely supported and must be inserted into, but not beyond the inside wall at the chimney vent.
5. When vent connections must pass through walls or partitions of combustible material, a thimble must be used and installed according to local codes.
6. Vent pipe through the roof should be extended to a height determined by National Fuel Gas Code or local codes. It should be capped properly to prevent rain water from entering the vent. Roof exit should be waterproofed.
7. Use type “B” double wall vent when vent pipe is routed through cool spaces (below 60° F.).
8. Where long periods of airflow are desired for comfort, use long fan cycles instead of continuous airflow.
9. Apply other good venting practices as stated in the venting section of the National Fuel Gas Code ANSI Z223.1 “latest edition”.
10. Vent connectors serving appliance vented by natural draft or nonpositive pressure shall not be connected into any portion of a mechanized draft system operating under positive pressure.
11. Horizontal pipe runs must be supported by hangers, straps or other suitable material in intervals at a minimum of every 3 feet of pipe.
12. A furnace shall not be connected to a chimney or flue serving a separate appliance designed to burn solid fuel.
13. The flow area of the largest section of vertical vent or chimney shall not exceed 7 times the smallest listed appliance categorized vent area, flue collar area, or draft hood outlet area unless designed in accordance with approved engineering methods.
Maximum Vent or Tile Lined Chimney Flow Area = [(D)2 ]/4 X 7 Drafthood outlet diameter, flue collar diameter, or listed appliance categorized vent diameter.
(a) This requirement covers most installations

Gas Vent Termination

Roof Pitch

Minimum Height

Flat to 6/12 Over 6/12 to 7/12 Over 7/12 to 8/12 Over 8/12 to 9/12 Over 9/12 to 10/12 Over 10/12 to 11/12 Over 11/12 to 12/12 Over 12/12 to 14/12 Over 14/12 to 16/12 Over 16/12 to 18/12 Over 18/12 to 20/12 Over 20/12 to 21/12

1.0 Feet (a) 1.25 Feet 1.5 Feet 2.0 Feet 2.5 Feet 3.25 Feet 4.0 Feet 5.0 Feet 6.0 Feet 7.0 Feet 7.5 Feet 8.0 Feet

(a) This requirement covers most installations

Listed Cap

Vertical Wall
8 ft.
Lowest Discharge Opening

Minimum Height

Roof Pitch is X/12

The vent termination should not be less than 8 ft. from a vertical wall.

S8XB-SVX001-1B-EN

Furnace General Installation

Air for Combustion and Ventilation
Adequate flow of combustion and ventilating air must not be obstructed from reaching the Furnace. Air openings provided in the Furnace casing must be kept free of obstructions which restrict the flow of air. Airflow restrictions affect the efficiency and safe operation of the Furnace. Keep this in mind should you 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 with “latest edition” of Section 9.3, Air for Combustion and Ventilation, of the National Fuel Gas Code, ANSI Z223.1 / NFPA 54. Installation Codes, and applicable provisions of the local building codes. Special conditions created by mechanical exhausting of air and fireplaces must be considered to avoid unsatisfactory Furnace operation.

Furnace location may be in an unconfined space or a confined space.
Unconfined space are installations with 50 cu. ft. or more per 1000 BTU/hr input from all equipment installed. Unconfined spaces are defined in the table and illustration for various furnace sizes. These spaces may have adequate air by infiltration to provide air for combustion, ventilation, and dilution of flue gases. Buildings with tight construction (for example, weather stripping, heavily insulated, caulked, vapor barrier, etc.), may need additional air provided as described for confined space.

Minimum Area in Square Feet for Unconfined Space Installations

Furnace Maximum BTUH Input Rating

With 8 Ft. Ceiling, Minimum Area in Square Feet
of Unconfined Space

40,000

250

60,000

375

80,000

500

100,000

625

120,000

750

UNCONFINED
50 CU. FT. OR MORE PER 1000 BTU/HR INPUT ALL EQUIP. INSTALLED

NO DOORS
WATER CLOTHES FURNACE HEATER DRYER

Confined spaces are installations with less than 50 cu. ft. of space per 1000 BTU/ hr input from all equipment installed. Confined spaces are defined in the table and illustration for various furnace sizes. Air for combustion
32

and ventilation requirements can be supplied from inside the building.
The following types of installations will require use of OUTDOOR AIR for combustion, due to chemical exposures:
· Commercial buildings
· Buildings with indoor pools
· Furnaces installed in commercial laundry rooms
· Furnaces installed in hobby or craft rooms
· Furnaces installed near chemical storage areas
Exposure to the following substances in the combustion air supply will also require OUTDOOR AIR for combustion:
· Permanent wave solutions
· Chlorinated waxes and cleaners
· Chlorine based swimming pool chemicals
· Water softening chemicals
· Deicing salts or chemicals
· Carbon Tetrachloride
· Halogen type refrigerants
· Cleaning solvents (such as perchloroethylene)
· Printing inks, paint removers, varnish, etc.
· Hydrochloric acid
· Cements and glues
· Antistatic fabric softeners for clothes dryers
· Masonry acid washing material
Note: Extended warranties 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, beauty shops, and printing facilities.

Minimum Free Area in Square Inches Each Opening (Furnace Only) in a Confined Space

Furnace Max BTUH.Input
Rtg.

Air From Inside

Air From Outside

Vertical Duct (a)

Horizontal Duct (b)

40,000

100

60,000

100

80,000

100

100,000

100

120,000

120

(a) 1 Square inch per 4000 BTU/hr Vertical Duct. (b) 1 Square inch per 2000 BTU/hr Horizontal Duct.

S8XB-SVX001-1B-EN

Furnace General Installation

CONFINED
LESS THAN 50 CU. FT. PER 1000 BTU/HR INPUT ALL EQUIP. INSTALLED

FURNACE

All air from inside the building The confined space shall be provided with two permanent openings communicating directly with an additional room(s) of sufficient volume so that the combined volume of all spaces meets the criteria for an unconfined space. The total input of all gas utilization equipment installed in the combined space shall be considered in making this determination. Refer to the Minimum Free Area in square inches for confined spaces table, for minimum open areas required.
CONFINED SPACE AIR FROM INSIDE BUILDING

CONFINED SPACE

PERMANENT OPENINGS

All air from outdoors The confined space shall be provided with two permanent openings, one commencing within 12 inches of the top and one commencing within 12 inches of the bottom of the enclosure.
The openings shall communicate directly, or by ducts, with the outdoors or spaces (crawl or attic) that freely communicate 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
INLET

CONFINED SPACE AIR FROM VENTILATED ATTIC/CRAWL SPACE
ATTIC LOUVERS TO OUTDOORS

CONFINED SPACE
ALTERNATE INLET AIR

OUTLET AIR
INLET AIR DUCT

CONFINED SPACE AIR FROM VENTILATED ATTIC

ATTIC LOUVERS TO OUTDOORS

CONFINED SPACE

OUTLET AIR
INLET AIR DUCT

S8XB-SVX001-1B-EN

Furnace General Installation

Duct Connections

Air duct systems should be installed in accordance with standards for air conditioning systems, National Fire Protection Association Pamphlet No. 90. They should be sized in accordance with ACCA Manual D or whichever is applicable. Check on controls to make certain they are correct for the electrical supply. Central furnaces, when used in connection with cooling units, shall be installed in parallel or on the upstream side of the cooling units to avoid condensation in the heating element, unless the furnace has been specifically approved for downstream installation. With a parallel flow arrangement, the dampers or other means used to control flow of air shall be adequate to prevent chilled air from entering the furnace, and if manually operated, must be equipped with means to prevent operation of either unit unless the damper is in full heat or cool position. Flexible connections of nonflammable material may be used for return air and discharge connections to reduce the transmission of vibration. Though these units have been specifically designed for quiet, vibration free operation, air ducts can act as sounding boards and could, if poorly installed, amplify the slightest vibration to the annoyance level.

When the furnace is located in a utility room adjacent to the living area, the system should be carefully designed with returns which minimize noise transmission through the return air grille. Although these winter air conditioners are designed with large blowers operating at moderate speeds, any blower moving a high volume of air will produce audible noise which could be objectionable when the unit is located very close to a living area. It is often advisable to route the return air ducts under the floor or through the attic. Such design permits the installation of air return remote from the living area (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 duct(s) sealed to the furnace and terminating outside the space containing the furnace. For furnaces not equipped with a cooling coil, it is recommended that the outlet duct be provided with a removable access panel. The 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 for sampling the air stream. The removable cover must be sealed to prevent air leaks.

Where there is no complete return duct system, the return connection must be run full size from the Furnace to a location outside the utility room, basement, attic, or crawl space. Do Not install return air through the back of the Furnace cabinet. Do Not install return air through the side of the furnace cabinet on horizontal applications without following the guidelines in the Return Air Filters section in the figure for Horizontal furnace with side return.

Carbon monoxide, fire or smoke can cause serious bodily injury, death, and/or property damage. A variety of potential sources of carbon monoxide can be found in a building or dwelling such as gas-fired clothes dryers, gas cooking stoves, water heaters, furnaces and fireplaces. The U.S. Consumer Product Safety Commission recommends that users of gas-burning appliances install carbon monoxide detectors as well as fire and smoke detectors per the manufactures installation instructions to help alert dwelling occupants of the presence of fire, smoke or unsafe levels of carbon monoxide. These devices should be listed by Underwriters Laboratories, Inc. Standards for Single and Multiple Station Carbon Monoxide Alarms, UL 2034.

Note: The manufacturer of your Furnace DOES NOT test any detectors and makes no representations regarding any brand or type of detector.

Note: Seal per local codes

In horizontal applications, the furnace must be supported with one of the following methods.
1. Support below with non-combustible material as shown in the illustration.
2. Use BAYHANG kit. See kit instructions.
3. Use unistrut with cabling to provide support from under the unit.
4. Use strapping material in locations shown in illustration.

WHEN SUSPENDING THE HORIZONTAL FURNACE, IT SHOULD BE SUSPENDED BY ATTACHING TO THE CABINET IN THE PLACES SHOWN.

WHEN SUPPORTING THE FURNACE FROM BELOW, SUPPORT FRONT TO BACK (AS SHOWN) OR SIDE TO SIDE.

S8XB-SVX001-1B-EN

Furnace General Installation

Table 6. Supply Duct Connections
Upflow Furnace with Coil Note: There are no longer guide holes located on the furnace flange.

Furnace in Horizontal Left with Coil Note: There are no longer guide holes located on the furnace flange.

Refer to Step 1., Step 3., Step 5., Step 7.
Furnace in Horizontal Right with “A” Coil
Note: Flat or dedicated horizontal coils may require flanges to be bent upward.

Refer to Step 1., Step 4., Step 5., Step 7. Downflow Furnace with Coil

Refer to Step 2., Step 4. S8XB-SVX001-1B-EN

Refer to Step 2., Step 4. 35

Furnace General Installation
Horizontal Right and Downflow Furnace — no Coil Important: A BAYBASE is required when installing the furnace on a combustible floor.

Refer to Step 1., Step 6., Step 7.

Installation Instructions 1. Bend furnace flanges up. 2. Bend furnace side flanges down. 3. Set the coil on top of the furnace. 4. Support the furnace and coil independently.

5. Screw through the coil cabinet into the furnace flange. Guide holes are located on the coil.
6. Attach ducting.
7. Seal per local codes and requirements.

S8XB-SVX001-1B-EN

Furnace General Installation

Return Duct Connections

Return Ducting General Guidelines · Back returns are not allowed on any S-Series Furnaces · Side returns are not allowed on downflow or horizontal S-Series Furnaces · Mounting flanges must be located on ducting · Shoot screws through the mount flanges into the furnace cabinet · Always seal per local codes and requirements · Furnace, coil, and ducting must be supported 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 Filter

Upflow Furnace with Bottom Return in Closet with Filter Box

FILTER

Refer to Step 1., Step 2., Step 3., and Step 8.
Upflow Furnace with Bottom Return Mounted on a Ducted Pedestal

Refer to Step 1., Step 4., Step 5., and Step 8.
Upflow Furnace with Bottom Return Mounted on a Ducted Pedestal with Filter Box

Refer to Step 1., Step 6., Step 3., and Step 8.
Installation Instructions 1. Remove the bottom plate. 2. Set the furnace on the base inside closet. 3. Install remote filter. 4. Set the furnace on the filter box inside closet. 5. Must have grille present for air.
S8XB-SVX001-1B-EN

FILTER
Refer to Step 1., Step 7., and Step 8.
6. Set the furnace on the ducted pedestal. The ducted pedestal will use ducted air from a remote location.
7. Set the furnace on the filter box. The ducted pedestal will use ducted air from a remote location.
8. Seal per local codes and requirements.
37

Furnace General Installation
Upflow Furnace with Bottom and Side Returns Mounted on a Ducted Pedestal with Side Return and Filter Box
Important: Make sure the thermostat wiring hole is sealed on the cabinet side with the side return.
Important: Make sure not to cut the cabinet in the “No Cut” area. Note: Use Optional BAYLIFT kit to lift furnace. Follow kit instructions.
Note: The furnace bottom pedestal must be a minimum of 6″ in height.

Cabinet cutout when used with BAYLIFT 21″ Filter Cabinet with BAYLIFT Kit shown

FILTER

Refer Step 1. to Step 8.
Upflow Furnace with Side Return Important: Make sure the thermostat wiring hole is sealed on the
cabinet side with the side return. Important: Make sure not to cut the cabinet in the “No Cut” area. Note: If using a filter box, use a transition, if possible, to attach the
filter box to the furnace cabinet.

No Cut Area

Cutouts

Flush with back of furnace cabinet

Upflow Furnace with Two Side Returns
Important: One of the sides must have a transition to allow the thermostat wiring to exit the cabinet.
Important: If a transition is not a viable option, a hole will need to be drilled in the side of the cabinet for the thermostat wiring to exit.
Important: Make sure not to cut the cabinet in the “No Cut” area.
Note: If using one transition, the thermostat wiring will exit on the transition side.
Note: If using a filter boxes, use transitions, if possible, to attach the filter boxes to the furnace cabinet.

Use four corner guides to create cutout
No Cut Area Refer Step 9. to Step 12.
38

Use four corner guides to create cutout
No Cut Area Refer Step 9. to Step 12.
S8XB-SVX001-1B-EN

Downflow Furnace with Top Return

Furnace General Installation
Downflow Furnace with Top Return and Plenum

Refer to Step 13., Step 14., Step 17., and Step 8. Downflow Furnace with Top Return and Plenum with Filter Box
FILTER

Refer to Step 13., Step 15., Step 17., and Step 8.

Refer to Step 13., Step 16., Step 14., and Step 8.
Installation Instructions 1. Remove the bottom plate. 2. Create ducting and set the furnace in place. 3. Match the filter cabinet flush to the back and
bottom sides of the furnace cabinet and secure in place with screws. 4. Mark the two areas to be cut out for the return air. 5. Cut out the two sections of the cabinet and BAYLIFT kit to be removed. 6. Attach ducting to the filter box. 7. The ducted pedestal will use ducted air from a remote location. 8. Seal per local codes and requirements. 9. Using guides, remove the cutout for the side return.
S8XB-SVX001-1B-EN

10. Create ducting and set the furnace in place. Use screws to attach ducting to the furnace cabinet.
11. Seal bottom panel per local codes and requirements.
12. Seal all other panels per local codes and requirements.
13. Remove the top plate. 14. Attach the ducting to the top of the furnace. 15. Attach the plenum ducting to the top of the furnace. 16. Attach the filter box to the top of the furnace. 17. Install remote filter.
39

Furnace General Installation

Return Air Filters
TYPICAL AIR FILTER INSTALLATIONS Filters are not factory supplied for furnaces. Filter size needed will be dependent on type of filter and CFM requirement. Filters must be installed externally to the unit.
Important: It is recommended to transition return ducting to the same size as the opening. It is acceptable for return duct or filter frame to extend forward of the opening but plastic plugs MUST be installed in any opening that the duct or filter frame may cover.

Return Air Filters Furnace Width
141/2″ 171/2″ 21″ 241/2″

Filter Qty and Size
1 — 14″ x 25″ x 1″ 1 — 16″ x 25″ x 1″ 1 — 20″ x 25″ x 1″ 1 — 24″ x 25″ x 1″

Note: For upflow airflow furnaces where the airflow requirement exceeds 1600 CFM – Furnaces will require return air openings and filters on: (1) both sides, or (2) one side and the bottom, or (3) just on the bottom.

Preparation 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 order to connect to existing supply and return ductwork.
2. For upflow side return installations, remove the insulation around the opening in the blower compartment
3. The side panels of the upflow furnace include locating notches that are used as guides for cutting an opening for return air, refer to the figure and the upflow furnace outline drawing for duct connection dimensions for various furnaces.
4. If a 3/4″ flange is to be used for attaching the air inlet duct, add to cut where indicated by dotted lines. Cut corners diagonally and bend outward to form flange.
5. If flanges are not required, and a filter frame is installed, cut between locating notches as in illustration.
6. The bottom panel of the upflow furnace must be removed for bottom return air.

UPFLOW FURNACES ONLY

LOCATING NOTCHES PROVIDED
FOR SIDE
RETURN CUTOUT
SEE OUTLINE DRAWING

FRONT OF FURNACE

S8XB-SVX001-1B-EN

RETURN AIR FILTERS FOR FURNACE IN HORIZONTAL CONFIGURATION When the modular blower is installed in the horizontal configuration, the return air filters must be installed exterior to the modular blower cabinet. Remote filter grilles may be used for homeowner convenience, refer to Figure 1, p. 41 or the filters may be installed in the duct work upstream of the modular blower, refer to Figure 2, p. 41.
Filter kits are available for horizontal applications.
Note: Direct coupled side returns are not allowed to the blower cabinet.

Furnace General Installation
Figure 1. Remote Filter Installation
Remote Filter Grille
Remote Filter Grille
Figure 2. Duct Filter Installation
F I L T E R

S8XB-SVX001-1B-EN

Furnace General Installation

Electrical Connections
Make wiring connections to the unit as indicated on enclosed wiring diagram. As with all gas appliances using electrical power, this furnace shall be connected into a permanently live electric circuit. It is recommended that furnace be provided with a separate “circuit protection device” electric circuit. The furnace must be electrically grounded in accordance with local codes or in the absence of local codes with the National Electrical Code, ANSI/NFPA 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 wiring diagram. Refer to the Wiring Diagram section in this document and unit wiring diagram attached to furnace.
WARNING
FIRE HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. This Warning applies to installations with a flammable refrigeration system. The furnace must be powered except for service. The furnace shall be installed and connected according to installation instructions and wiring diagrams that are provided with the evaporator coil.

Field Wiring
Two Stage Thermostat
W1
Option #1
R
Condensate Switch
G
B
Y2
Option #2
Y1
Condensate Switch
O

Furnace
W1 R G B Y2 Y1

FIELD WIRING DIAGRAM FOR S8B1 / S8X1 SINGLE STAGE HEATING THERMOSTAT, ONE / TWO STAGE AC OR HEAT PUMP

Outdoor Unit (No Transformer)

NOTES: 1) HP = Wiring used for Heat Pump systems. 2) Y1 and/or Y2 must connect from the thermostat to the IFC
for proper airflow. 3) A/TCONT824 thermostats do not require the use of X2. 4) Y2 not available for S8B1.

Option #1 Condensate
Switch
Option #2 Condensate
Switch

Two Stage Thermostat

Furnace

FIELD WIRING DIAGRAM FOR S8X2 TWO STAGE HEATING THERMOSTAT, ONE / TWO STAGE AC OR HEAT PUMP

Outdoor Unit (No Transformer)

NOTES: 1) HP = Wiring used for Heat Pump systems. 2) Y1 and/or Y2 must connect from the thermostat to the IFC
for proper airflow. 3) Remove Y1-O jumper for HP systems. O terminal must be
connected as shown for gas heating operation during defrost. 4) If the thermostat does not have W2, or there are not enough
conductors jumper W1 to W2 at the IFC. 5) A/TCONT824 thermostats do not require the use of X2.

Red

A/TFD Field Wiring Using EAC Terminals

EAC

Green

Blue

Black

Replace the factory installed 35va transformer with the 50va transformer

supplied with the air cleaner. Connect to EAC terminals on the IFC per

the wiring diagram.

S8XB-SVX001-1B-EN

Twinning

2 STAGE HEATING 1 STAGE COOLING
THERMOSTAT

TWINNING CONNECTION DIAGRAM FOR TWINNING S-SERIES FURNACES 2 STAGE HEAT / 1 STAGE COOLING THERMOSTAT

FURNACE NO. 1

FURNACE NO. 2

Furnace General Installation
NOTES: 1. BOTH FURNACES MUST BE POWERED FROM
THE SAME 115 VAC PHASE LEG AT THE CIRCUIT BREAKER. 2. TRANSFORMERS MUST BE IN PHASE.
– MEASURE THE VOLTAGE BETWEEN THE “R” TERMINALS ON BOTH FURNACES, VOLTAGE SHOULD BE LESS THAN 10 VOLTS.
– IF GREATER, REVERSE THE LOW VOLTAGE ON ONE OF THE TRANSFORMERS AND RECHECK.
3. HEATING AND COOLING AIRFLOW MUST BE THE SAME FOR BOTH FURNACES.
4. OD UNIT TYPE SETUP MUST BE THE SAME FOR BOTH FURNACES. 5. WHEN TWINNING THE S8B1 / S8X1 FURNACES, DISREGARD THE
W2 AND R2 WIRING.

W1 W2 R G B

W1
R1
W2
R2
R
G
B

W1 W2 R

ISOLATION RELAY
R1 R2

1 STAGE ODU (NO TRANSFORMER)
Y1 B

2 STAGE HEATING 1 STAGE COOLING
THERMOSTAT

TWINNING CONNECTION DIAGRAM FOR TWINNING S-SERIES FURNACES 2 STAGE HEAT / 2 STAGE COOLING THERMOSTAT

FURNACE NO. 1

FURNACE NO. 2

NOTES: 1. BOTH FURNACES MUST BE POWERED FROM
THE SAME 115 VAC PHASE LEG AT THE CIRCUIT BREAKER. 2. TRANSFORMERS MUST BE IN PHASE.
– MEASURE THE VOLTAGE BETWEEN THE “R” TERMINALS ON BOTH FURNACES, VOLTAGE SHOULD BE LESS THAN 10 VOLTS.
– IF GREATER, REVERSE THE LOW VOLTAGE ON ONE OF THE TRANSFORMERS AND RECHECK.
3. HEATING AND COOLING AIRFLOW MUST BE THE SAME FOR BOTH FURNACES.
4. OD UNIT TYPE SETUP MUST BE THE SAME FOR BOTH FURNACES.

Y2 W1 W2 R

ISOLATION RELAY (FIELD SUPPLIED)
R1
R2

W1 W2 R

ISOLATION RELAY
R1 R2

2 STAGE ODU (NO TRANSFORMER)
Y2 Y1 B

S8XB-SVX001-1B-EN

Furnace General Installation

2 STAGE HEATING 1 STAGE COOLING
THERMOSTAT
Y1

TWINNING CONNECTION DIAGRAM FOR TWINNING S-SERIES FURNACES 2 STAGE HEAT / 1 STAGE COOLING (WITH TRANSFORMER) THERMOSTAT

FURNACE NO. 1

FURNACE NO. 2

W1 W2 R G B

W1 W2 R G

ISOLATION RELAY (FIELD SUPPLIED)
R1
R2

W1 W2 R

ISOLATION RELAY
R1

OUTDOOR UNIT (WITH TRANSFORMER)

ISOLATION RELAY (FIELD SUPPLIED) ALTERNATE CONNECTION

From Dwg. 21B341337 Rev. 2

2 STAGE HEATING 1 STAGE COOLING
THERMOSTAT

TWINNING CONNECTION DIAGRAM FOR TWINNING S-SERIES FURNACES 2 STAGE HEAT / 1 STAGE COOLING THERMOSTAT
WITH SINGLE STAGE THERMOSTAT

FURNACE NO. 1

FURNACE NO. 2

W1 W2

SEE NOTE 5

W1 W2 R

ISOLATION RELAY (FIELD SUPPLIED)
R1

W1 W2 R

ISOLATION RELAY
R1 R1

1 STAGE ODU (NO TRANSFORMER)
Y1 B

S8XB-SVX001-1B-EN

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: 1. Duct connections are properly sealed. 2. Filters are in place. 3. Venting is properly assembled. 4. Blower vestibule panel is in place and all screws in place.

Turn knob on main gas valve within the unit to the “OFF” position. Turn the external gas valve to “ON”. Purge the air from the gas lines. After purging, check all gas connections for leaks with a soapy solution. — DO NOT CHECK WITH AN OPEN FLAME. Allow 5 minutes for any gas that might have escaped to dissipate. Turn the gas valve in the unit to the “ON” position.
Propane Gas being heavier than air may require forced ventilation. Turn the toggle switch on the Gas Valve in the unit to the “ON” position.

Lighting Instructions

Lighting instructions appear on each unit. Each installation must be checked out at the time of initial start up to ensure proper operation of all components. Check out should include putting the unit through one complete cycle as outlined below. Turn on the main electrical supply and set the comfort control above the indicated temperature. The igniter will automatically heat, then the gas valve is energized to permit the flow of gas to the burners. After ignition and flame is established, the flame control module monitors the flame and supplies power to the gas valve until the comfort control is satisfied.

WARNING
FIRE OR EXPLOSION HAZARD!
Failure to follow this Warning could result in property damage, severe personal injury, or death. Do NOT attempt to manually light the furnace.

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 to the “OFF” position. Disconnect the electrical supply to the unit.
Whenever your house is to be vacant, arrange to have someone inspect your house for proper temperature. This is very important during freezing weather. If for any reason your furnace should fail to operate damage could result, such as frozen water pipes.

CAUTION
FREEZE CAUTION!
Failure to follow this Caution could result in property damage or personal injury. If complete furnace shutdown is done during the cold weather months, provisions must be taken to prevent freeze-up of all water pipes and water receptacles.

Control and Safety Switch Adjustment

LIMIT SWITCH CHECK OUT The limit switch is a safety device designed to close the gas valve should the furnace become overheated. Since proper operation of this switch is important to the safety of the unit, it must be checked out on initial start up by the installer.

To check for proper operation of the limit switches, set the thermostat to a temperature higher than the indicated temperature to bring on the gas valve. Restrict the airflow by blocking the return air to the blower. When the furnace reaches the maximum outlet temperature as shown on the rating plate, the burners must shut off. If they do not shut off after a reasonable time and overheating is evident, a faulty limit switch is probable and the limit switch must be replaced. After checking the operation of the limit control, be sure to remove the paper or cardboard from the return air inlet, or reconnect the blower.

S8XB-SVX001-1B-EN

Furnace Combustion Air Exhaust Options

Note: Default is left side for electric and gas connections.
The following sections give instructions for the different furnace orientations and the options for venting the exhaust combustion air.

Important: When looking at the different orientations, the direction of the combustion air exhaust in the illustration’s description is after the furnace has been rotated, if needed.

Table 7. Venting Options for Upflow Applications

Refer to the illustrations below to find the approved venting options for upflow furnace. Important: The exhaust must be vented to the outdoors.

Upflow Orientation or Installation

Vented out top.

Vented through left side.

Vented through right side.

Table 8. Venting Options for Horizontal Left Applications

Refer to the illustrations below to find the approved venting options for horizontal left furnace. Important: The exhaust must be vented to the outdoors. Note: 4″ Type B double wall vent pipe must be used inside of the furnace cabinet.

Vented out top.

Horizontal Left Orientation or Installation

Vented through left side.

S8XB-SVX001-1B-EN

Furnace Combustion Air Exhaust Options
Table 9. Venting Options for Horizontal Right Applications
Refer to the illustrations below to find the approved venting options for horizontal right furnace. Important: The exhaust must be vented to the outdoors. Note: 4″ Type B double wall vent pipe must be used inside of the furnace cabinet.
Horizontal Right Orientation or Installation Vented out top.
Vented through right side.

Table 10. Venting Options for Downflow Applications
Refer to the illustrations below to find the approved venting options for downflow furnace models. Important: The combustion air exhaust must be vented to the outdoors. Note: 4″ Type B double wall vent pipe must be used inside of the furnace cabinet.
Downflow Orientation or Installation
Vented out top. Note: Requires kit BAYVENT600. Kit used
with B, C, and D cabinets only. Note: “A” cabinet furnaces must be vented
through the left of right side openings.

Vented through left side.

Vented through right side.

S8XB-SVX001-1B-EN

Furnace Combustion Air Exhaust Options

Combustion Air Conversions

Important: After deciding the orientation of the flue outlet, cut the metal tabs around the appropriate 5″ metal cutout on the furnace cabinet and remove the cutout, if necessary.
Note: When rotating the inducer it may be necessary to cut the wire tie. A new wire tie must be installed once the inducer is rotated.

Pressure Switch locations S8B1/S8X1: PS is connected to the hot header. S8X2: PS1 is connected to the inducer. PS2 is connected to the hot
header.

Note: Self-tapping screws are recommended for attaching the vent pipe to the inducer outlet.

Upflow orientation with top venting

Upflow orientation with left side venting
Note: When rotating the inducer it may be necessary to cut the wire tie. A new wire tie must be installed once the inducer is rotated.

Refer to Step 1. Upflow orientation with right side venting

Refer Step 2. to Step 6. Horizontal left orientation with left side venting

Refer Step 2. to Step 6. Horizontal left orientation with top venting

Refer to Step 1. Horizontal right orientation with right side venting

Refer Step 2. to Step 6. 48

Refer to Step 1. S8XB-SVX001-1B-EN

Horizontal right orientation with top venting

Furnace Combustion Air Exhaust Options
Downflow orientation with left side venting

Refer Step 2. to Step 5. and Step 7. Downflow orientation with right side venting

Refer Step 2. to Step 6.
Downflow orientation with top venting Note: Requires kit BAYVENT600. Kit used with B, C, and D cabinets
only. Follow kit instructions for installation. Note: 4″ Type B double wall vent pipe must be used inside of the
furnace cabinet.

Refer Step 2. to Step 6.

Installation Instructions
1. No changes need to be made to the inducer when installing the furnace in upflow position when vented through the top.
2. Before proceeding, lay unit on its back to make the conversion easier.
3. Remove the four screws holding the inducer in place.

Refer to Step 2., Step 3., Step 4., Step 8. and Step 6.
4. Rotate the inducer so the inducer outlet is pointing towards the 5″ cutout.
5. Secure the inducer in place using the screws removed in step 3.
6. Attach the vent to the inducer outlet. 7. Attach the vent outlet gasket to the vent outlet. 8. Install BAYVENT600 kit per the kit instructions.

S8XB-SVX001-1B-EN

Integrated Furnace Control Menu

IdL
STATUS MENU
Err
ACTIVE ERRORS
L6F LAST 6 FAULTS
CR1 Control Release #
COd Cooing Off Delay
ODU Outdoor Stages
HOD Heat Off Delay
ISD Inter-Stage Delay
COF Connuous Fan Tap
COP Compressor Operaon
Speed Tap
HtP Heang Speed Tap

Example Gas Heat
Ht
Example Pressure Switch Error
E3.1
Example Pressure Switch Error
E3.1
Example Soware Version #
CR
Example seconds
000
Example Single Stage
1-1
Example seconds
100
Example seconds
600
Example Tap #
CF.1
Example Tap #
C1.7
Example 1st Stage Tap #
H1.5

S8B1 – S8X1 Control System Menu Single Stage OD

Example Tap 5
tp5

SETTING UP YOUR SYSTEM:
To change any factory default value, first remove any “call” from the furnace and allow all fan off delays to finish. (IDL should be seen on the display)
Scroll to the selected Menu item by momentarily depressing the “MENU” key and then depress the “OPTION” key to the desired seng. Then momentarily depress the “MENU” key again to save the change.

Example Open Limit Switch Error
E04
01

CLEARING THE LAST6 FAULTS:
To clear the stored faults, scroll to the last 6 faults menu, enter the menu by scrolling to the right and hold the “Opon” key for at least 5 seconds. Release and a set of 3 dashes will be seen 3 mes. This confirms the faults have been cleared.

090
Example 2 stage 1 compressor
2-1

180

060

140

180

000

300

Connuous Fan Connuous fan cannot be adjusted

C1.1 H1.1

C1.2 H1.2

900
SELECTING COOLING/HP FAN SPEEDS for 1-1 ODU: Airflow can be adjusted while the unit is running. Scroll to the COP menu and momentarily push the OPTION key. Tap 7 is the default seng for all models. When selecon is made, momentarily push the MENU key to save.

C1.3

C1.4

C1.5

C1.6

H1.3

H1.4

H1.6

H1_7

Default Airflow Taps
Gas Heat = Tap 5
ODU Menu 1-1 Cooling / HP = Tap 7

C1.8

C1.9

H1.8

S8XB-SVX001-1B-EN

ORN LED Orientaon

run Run Test Mode

SELECTING GAS HEAT FAN SPEEDS:
Airflow can be adjusted while the unit is running.
Scroll to the HTP menu and momentarily push the OPTION key. Tap #5 is the default seng for all models. When selecon is made, momentarily push the MENU key to save.
If the temperature rise is too high, increase airflow. If the temperature rise too low, decrease airflow.
NOTE: Tap 9 is not available for gas heang.

Designated Gas Heang Airflow Taps
S81A040M3PSC (1-8) S81B040M2PSC (1-8) S81B060M4PSCA/B (1-7) S81B080M4PSCA/B (1-6) S81C080M5PSC (1-8) S81C100M5PSCB (1-8) S8*1D120M5PSC (1-7)

S8XB-SVX001-1B-EN

IdL
STATUS MENU
Err
ACTIVE ERRORS

Example Gas Heat
Ht
Example Pressure Switch Error
E3.1

L6F LAST 6 FAULTS
CR1 Control Release #
COd Cooing Off Delay
ODU Outdoor Stages
HOD Heat Off Delay
ISD Inter-Stage Delay

Example Pressure Switch Error
E3.1
Example Soware Version #
CR
Example seconds
000
Example Single Stage
1-1
Example seconds
100
Example seconds
600

COF Connuous Fan Tap

Example Tap #
CF.1

COP Compressor Operaon
Speed Tap

Example Tap #
C1.3

HtP Heang Speed Tap

Example Tap #
H1.5

S8X1 Control System Menu Two Stage OD

Example Tap 5
tp5

Example Open Limit Switch Error
E04
001

090
Example 2 stage 1 compressor
2-1

180

060

140

000

300

Connuous Fan Connuous fan cannot be adjusted

C1.1 H1.1

C1.2 C2.7 H1.2

180 900

SELECTING COOLING / HP FAN SPEEDS for 2-1 ODU:
Airflow can be adjusted while the unit is running.
1st Stage Airflow: Scroll to the COP menu and momentarily push the OPTION key. Tap #3 is the default 1st stage seng for all models. When selecon is made, momentarily push the MENU key to save.(change will not be applied unl 2nd stage airflow tap is saved)
2nd Stage Airflow: Aer 1st stage airflow is selected, the default 2nd stage airflow tap will appear, C2_7. If this tap is desired, momentarily push the MENU key to save.
Important: If a change is made to either 1st or 2nd stage airflow, both must be saved by pushing the MENU key. Neither selecon will be saved if this is not done.

Default Airflow Taps
Gas Heat = Tap 5
ODU Menu 2-1 1st Stage Cooling / HP = Tap 3 2nd Stage Cooling / HP = Tap 7

C2.4 H1.3

C2.5 H1.4

C2.6 H1.6

C2.8 H1_7

C2.9 H1.8

Integrated Furnace Control Menu

ORN LED Orientaon

run Run Test Mode

SELECTING GAS HEATING FAN SPEEDS:
Airflow can be adjusted while the unit is running.
Scroll to the HTP menu and momentarily push the OPTION key. Tap #5 is the default seng for all models. When selecon is made, momentarily push the MENU key to save.
If the temperature rise is too high, increase airflow. If the temperature rise too low, decrease airflow.
NOTE: Tap 9 is not available for gas heang.

Designated Gas Heang Airflow Taps
S81A040M3PSC (1-8) S81B040M2PSC (1-8) S81B060M4PSCA/B (1-7) S81B080M4PSCA/B (1-6) S81C080M5PSC (1-8) S81C100M5PSCB (1-8) S8*1D120M5PSC (1-7)

Integrated Furnace Control Menu

IdL
STATUS MENU
Err
ACTIVE ERRORS
L6F LAST 6 FAULTS
CR1 Control Release #
COd Cooing Off Delay
ODU Outdoor Stages
HOD Heat Off Delay

S8X2 Control System Menu Single Stage OD

Example 1st stage Gas Heat

Example Tap 2

Ht1

tp2

Example 2nd Stage Pressure Switch
Error

Example 1st Stage Pressure Switch
Error

E3.4

E3.1

Example 2nd Stage Pressure Switch
Error

Example 1st Stage Pressure Switch
Error

E3.4

E3.1

Example Open Limit Switch Error
E04

Example Soware Version #
CR

001

Example seconds

000
Example Single Stage

090
Example 2 stage 1 compressor

180

1-1

2-1

Example seconds

100

060

140

180

ISD Inter-Stage Delay
COF Connuous Fan Tap
COP Compressor Operaon
Speed Tap
HtP Heang Speed Tap

Example seconds
600
Example Tap #
CF.1
Example Tap #
C1.7
Example 1st Stage Tap #
H1.2

000

300

Connuous Fan Connuous fan cannot be adjusted

C1.1 H1.1

C1.2 H1.3

ORN LED Orientaon

run Run Test Mode

900

SELECTING COOLING/HP FAN SPEEDS for 1-1 ODU:
Airflow can be adjusted while the unit is running.
Scroll to the COP menu and momentarily push the OPTION key. Tap 7 is the default seng for all models. When selecon is made, momentarily push the MENU key to save.

Default Airflow Taps
1st Stage Gas Heat = Tap 2 2nd Stage Gas Heat = Tap 5
ODU Menu 1-1 Cooling / HP = Tap 7

C1.3

C1.4

C1.5

C1.6

C1.8

C1.9

H1.4 H2.5

H2.6

H2_7

H2.8

Designated 1st Stage Gas Heang Airflow Taps

S8X2A040M3PSC S8X2B060M4PSC S8X2B080M4PSC S8X2C080M5PSC S8X2C100M5PSC S8X2D120M5PSC

(1-7) (1-5) (1-4) (1-5) (1-6) (1-4)

SELECTING GAS HEAT FAN SPEEDS:
Airflow can be adjusted while the unit is running.
1st Stage Airflow: Scroll to the HTP menu and momentarily push the OPTION key. Tap #2 is the default 1st stage seng for all models. When selecon is made, momentarily push the MENU key to save. (change will not be applied unl 2nd stage airflow tap is saved) See designated 1st stage heang taps available for each model.
2nd Stage Airflow: Aer 1st stage airflow is selected, the default 2nd stage airflow tap will appear, H2_5. If this tap is desired, momentarily push the MENU key to save.
If the temperature rise is too high, increase airflow. If the temperature rise too low, decrease airflow.
NOTE: Tap 9 is not available for gas heang.
Important: If a change is made to either 1st or 2nd stage airflow, both must be saved by pushing the MENU key. Neither selecon will be saved if this is not done.

S8XB-SVX001-1B-EN

IdL
STATUS MENU
Err
ACTIVE ERRORS
L6F LAST 6 FAULTS
CR1 Control Release #
COd Cooing Off Delay
ODU Outdoor Stages
HOD Heat Off Delay

Example 1st stage Gas Heat
Ht1
Example 2nd Stage Pressure Switch
Error
E3.4

S8X2 Control System Menu Two Stage OD

Example Tap 2
tp2
Example 1st Stage Pressure Switch
Error
E3.1

Example 2nd Stage Pressure Switch
Error

Example 1st Stage Pressure Switch
Error

E3.4

E3.1

Example Open Limit Switch Error
E04

Example Soware Version #
CR

001

Example seconds

000
Example Single Stage

090
Example 2 stage 1 compressor

180

1-1

2-1

Example seconds

100

060

140

180

ISD Inter-Stage Delay
COF Connuous Fan Tap
COP Compressor Operaon
Speed Tap

Example seconds
600
Example Tap #
CF.1
Example Tap #
C1.3

000

300

Connuous Fan Connuous fan cannot be adjusted

C1.1

C1.2

900

Default Airflow Taps
1st Stage Gas Heat = Tap 2 2nd Stage Gas Heat = Tap 5
ODU Menu 2-1 1st Stage Cooling / HP = Tap 3 2nd Stage Cooling / HP = Tap 7

Integrated Furnace Control Menu

HtP Heang Speed Tap

Example 1st Stage Tap #
H1.2

ORN LED Orientaon

run Run Test Mode

H1.1 dn

C2.7 H1.3

C2.4 H1.4 H2.5

C2.5

C2.6

C2.8

C2.9

H2.6

H2_7

H2.8

Designated 1st Stage Gas Heang Airflow Taps

S8X2A040M3PSC S8X2B060M4PSC S8X2B080M4PSC S8X2C080M5PSC S8X2C100M5PSC S8X2D120M5PSC

(1-7) (1-5) (1-4) (1-5) (1-6) (1-4)

Integrated Furnace Control Menu

S8B1 – S8X1 – S8X2
Run Test Mode
Run Test Mode: To enter Run Test Mode, scroll to using the Menu key, then push the opon key. The LED will flash three mes, then begin the test. To exit the test mode, momentarily push the Menu key, cycle power to the furnace, or make a valid thermostat call for capacity or fan.
Sequence of Run Test Mode -Turns the inducer on in 1st stage for 30 seconds Turns on the inducer on 2nd stage for 30 seconds (N/A for S8B1, S8X1) Turns the igniter on for 10 seconds Turns the circulang blower on 1st stage compressor speed for 10 seconds Turns the circulang blower on 2nd stage compressor speed for 10 seconds (N/A for S8B1) Turns the circulang blower on 1st stage gas heat speed for 10 seconds Turns on the circulang blower on 2nd stage gas heat speed for 10 seconds (N/A for S8B1, S8X1)
The above sequence will repeat two more mes unless the Run Test Mode is exited, see above.
Important: The Run Test Mode does not test fire the furnace or bring the outdoor unit on. It is designed to allow the technician to observe each mode to ensure the IFC, inducer, and circulang blower are performing as intended.
S8B1 – S8X1 – S8X2 System Status Menu

1dL
Ht1

Example Tap #2
TP2

Example 1st Stage Pressure
Switch Error
e3.1

Ht2

Tp4

IdL = Idle, no demand for cooling, heating, or fan Ht1 = Demand for 1st stage gas heat (HT = S

S8XB S8B1A040M3PSC Gas Fired 1 Stage and 2 Stage Induced Draft Furnaces Installation Guide

S8B1A040M3PSC Gas Fired 1 Stage and 2 Stage Induced Draft Furnaces

Product Information

Specifications

Product Usage Instructions

Installation

Operation

Maintenance

FAQ

Q: Can I use field fabricated venting components for my

Q: Should I install a gas detecting warning device with the

References

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