Bryant 915SB - Page 77

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77

344442--2 Rev. C

A190259

Fig. 70 -- Wiring Diagram

Table of Contents

Table of Contents1
Sections1
Important2
Safety Considerations3
- Furnace Reliability Hazard3
- Introduction4
- Freeze Protection and Return Air Temperature4
Loose Parts Bag4
Minimum Clearances to Combustible Materials4
- General Installation5
- Condensate Drain Connection5
- Electrical Connections5
Codes and Standards5
Electrostatic Discharge (Esd) Precautions5
- Dimensional Drawing6
- Location7
- General7
- Multipoise Orientations8
- Location Relative to Cooling Equipment8
- Prohibited Installations8
- Installation in a Garage8
- Outdoor Combustion Air Method9
Air for Combustion and Ventilation9
- Standard Method10
- Indoor Combustion Aire NFPA & AGA10
- Combination of Indoor and Outdoor Air10
- Determining Free Area11
Minimum Free Area Required11
Minimum Space Volumes11
- Condensate Trap - Upflow Orientation12
- Condensate Trap - Downflow Orientation12
- Condensate Trap - Horizontal Orientation12
Condensate Trap12
Condensate Drain13
- Upflow/Downflow Orientation14
- For Right Side Condensate Drain14
- For Left Side Condensate Drain Connection14
- Knockout Removal14
- Formed Rubber Drain Grommet15
- Horizontal Orientation15
- Drain Trap Connection and Routing15
- Modify Rubber Drain Elbow15
- Example of Field Drain Attachment (Not Allowed)16
- Example of Field Drain Attachment17
- Upflow Installation17
- Supply Air Connections17
- Return Air Connections18
- Duct Flanges18
- Side Return Air Inlet18
- Bottom Return Air Inlet18
- Platform Furnace Support19
- Horizontal Installation19
- Suspended Furnace Support19
- Roll-Out Protection19
- Suspended Furnace Installation21
- Working Platform for Attic Installation21
- Filter Arrangement22
- Filter and Return Duct Sizing22
- Removing Bottom Closure Panel (2 Screws)22
- Removing Bottom Closure Panel (4 Screws)22
- Air Filter Selection and Duct Sizing24
- Air Filter Located in Filter Cabinet24
- Media Filter24
- Installation on Combustible Flooring25
- Return Duct Sizing27
- General Requirements27
Air Ducts27
Gas Piping27
- Gas Entry28
- Gas Pipe Grommet28
- Typical Gas Pipe Arrangement28
Maximum Capacity of Pipe28
- 115- -V Wiring29
- J- -Box Installation29
Electrical Connections29
- External Electrical Box on Furnace Casing30
- Typical Single- -Stage Wiring Diagram31
- Power Cord Installation in Furnace J- - Box31
- BX Cable Installation in Furnace J- - Box31
- 24- -V Wiring32
- Alternate Power Supplies32
- Accessories32
- Example of Single Stage Furnace Control32
- Notes for Thermostat Wiring Diagrams33
- Thermostat Wiring Diagrams33
Electrical Data33
- Venting34
- Venting Systems35
- Materials35
- Ventilated Combustion Air Systems36
- Locating the Vent Termination36
- Non-Direct Vent (1-Pipe) System36
Vent Termination Kit for Direct Vent (2- -Pipe) System36
- Non-Direct Vent / 1-Pipe System37
- Size the Vent and Combustion Air Pipes37
- Ventilated Combustion Air37
- Recommended Combustion Air Inlet Moisture Trap39
- Install the Vent and Combustion Air Pipes40
- Near Furnace Vent Connections40
- Configure the Furnace40
- Combustion Air and Vent Piping Insulation40
- Inducer Vent Elbow41
- – Hanger Spacing42
- Vent Coupling and Adapter with Gaskets42
- Optional Installation of the Vent Pipe43
- Installing the Vent Termination43
- Roof Terminations43
- Sidewall Terminations43
- Inducer Outlet Restrictor44
Deductions from Maximum Equivalent Vent Length46
Venting System Length Calculations47
Maximum Equivalent Vent Length47
- Inside Corner Terminations48
- Upflow Left Configuration49
- Downflow Left Configuration49
- Upflow Right Configuration49
- Downflow Right Configuration49
- Horizontal Left ---Vertical Vent Configuration50
- Horizontal Right ---Vertical Vent Configuration50
- Horizonal Left ---Left Vent Configuration50
- Combustion Air Pipe Attachment51
- Vent Pipe Flush with Adapter51
- Vent Pipe Flush Showing Coupling51
- Notes for Venting Options51
- Alberta and Saskatchewan Vent Termination55
- Vent Terminations for Ventilated Combustion Air55
- Prime Condensate Trap with Water56
- Purge Gas Lines56
- Priming Condensate Trap56
Start- -Up, Adjustment, and Safety Check56
- Adjustments57
- Single-Stage Furnace58
Orifice Size and Manifold Pressure60
- Check Inlet Gas Pressure61
- Standard Capacity Gas Valve with Tower Pressure Ports61
- 26,000 BTUH Low Capacity Gas Valve with Tower Pressure Ports61
- Adjust Manifold Pressure62
- Adjust Temperature Rise62
- Adjust Blower off Delay (Heat Mode)63
- Adjust Cooling Airflow63
- Blower off Delay Jumper Positions63
- Adjust Thermostat Heat Anticipator63
- Check Safety Controls64
- Amp. Draw Check with Ammeter64
Altitude Derate Multiplier for U.S.A64
- Component Test65
- Ignition Proving Failure65
- Control Circuitry Lockout65
- Service65
- Electrical Controls and Wiring66
Service and Maintenance Procedures66
Gas Rate66
- Troubleshooting67
- Retrieving Stored Fault Codes67
- Component Self-Test67
- Blower Motor and Wheel Maintenance68
- Care and Maintenance68
- Cleaning And/Or Replacing Air Filter68
- Blower Assembly69
- Cleaning Burners and Flame Sensor70
- Burner Assembly70
- Servicing Hot Surface Igniter71
- To Reinstall Burner Assembly71
- Flushing Collector Box and Drainage System71
- Cleaning Condensate Drain and Trap72
- Primary Heat Exchangers72
- Checking Heat Pad Operation (if Applicable)72
- Cleaning Heat Exchangers72
- Cleaning Heat Exchanger Cell73
- Secondary Heat Exchangers73
- Winterization73
Sequence of Operation73
- Cooling Mode74
- Heating74
- Continuous Blower Mode74
- Heat Pump74
- Parts Replacement Information Guide78

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