Johnson Controls Complete Guide to Diagnostics and Replacement Parts for Your TG8S Furnace

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DIAGNOSTIC FAULT CODE STORAGE AND RETRIEVAL

The control in this furnace is equipped with memory that will store up to five error codes to allow a service technician to diagnose problems more easily. This memory will be retained even if power to the furnace is lost. This feature should only be used by a qualified service tech- nician.

If more than five error codes have occurred since the last reset, only the five most recent will be retained. The furnace control board has a but- ton, labeled "LAST ERROR" that is used to retrieve error codes. This function will only work if there are no active thermostat signals. So any call for heating, cooling or continuous fan must be terminated before attempting to retrieve error codes.

To retrieve the error codes, push the LAST ERROR button. The LED on the control will then flash the error codes that are in memory, starting with the most recent. There will be a two-second pause between each flash code. After the error codes have all been displayed, the LED will resume the normal slow green flash after a five second pause. To repeat the series of error codes, push the button again.

If there are no error codes in memory, the LED will flash two green flashes. To clear the memory, push the LAST ERROR button and hold it for more than five seconds. The LED will flash three green flashes when the memory has been cleared, then will resume the normal slow green flash after a five-second pause.

SECTION X: REPLACEMENT PARTS LIST

DESCRIPTION

MOTOR

MOTOR, DIRECT DRIVE BLOWER

BLOWER, COMBUSTION

ELECTRICAL

CAPACITOR, RUN

SWITCH, LIMIT

CONTROL, FURNACE

IGNITER

SENSOR, FLAME

SWITCH, PRESSURE

SWITCH, DOOR

TRANSFORMER

VALVE, GAS

CONTROL, TEMPERATURE

AIR MOVING

HOUSING, BLOWER

HOUSING, BLOWER w/WHEEL

WHEEL, BLOWER

FABRICATED PARTS

BAFFLE, FLUE

BURNER, MAIN GAS

BRACKET, IGNITER

SHELF, BLOWER

RAIL, BLOWER (2 Req’d)

DESCRIPTION (Continued)

FABRICATED PARTS

BRACKET, BLOWER TRACK (2 Req’d)

HEAT EXCHANGER ASS’Y MANIFOLD, GAS

PAN, BOTTOM

PANEL, TOP

PANEL, DOOR (2 Req’d)

VENT PAN, COMBUSTION (w/Gasket)

PANEL, BLOCKOFF

LO-NOX SCREEN (L-Models Only)

MISCELLANEOUS

ORIFICE, BURNER (Natural #45) SIGHT GLASS, OVAL (2 Req’d) GASKET, FOAM (Door) (1.5 ft req’d)

GASKET, INTAKE PAN PLUG, VENT HOLE BRACKET, DOOR WIRING HARNESS FERRULE (3 Req’d) GROMMET (3 Req’d)

MOTOR MOUNT

TUBING, SILICON

DIAGRAM, WIRING

KNOB, QUARTER TURN (4 Req’d)

REPLACEMENT PART CONTACT INFORMATION

This is a generic parts list. To request a complete parts list, refer to the contact information below:

Visit our website at www.source1parts.com for the following information:

1.Search for a part or browse the catalog.

2.Find a dealer or distributor.

3.Customer Service contact information.

a.Click on the “Brand Links” button

b.Click on the “Customer Service” button

You can contact us by mail. Just send a written request to:

Johnson Controls Unitary Products

Consumer Relations

5005 York Drive

Norman, OK 73069

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Johnson Controls Unitary Products

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Contents Section I Safety List of SectionsList of Figures List of TablesSafety Requirements Specific Safety Rules and PrecautionsAnce to a 50 HZ Power Supply or a Voltage Above 130 Volts Combustion AIR Quality List of Contaminants Codes and StandardsFurnace Location and Clearances InspectionDirectly BELOW. Keep Clear of ALL OBSTRUC- Tions Floor Base and Ductwork Installation Downflow Coil InstallationSection II Ductwork Ductwork General InformationCOIL/FURNACE Assembly MC/FC/PC Series Coils Furnace Assembly MC & FC Series CoilsCoil Flange Installation Furnace Assembly PC Series CoilsCoil / Furnace Assembly HC Series Coils Downflow Duct ConnectorsBottom Return and Attic Installations Attic InstallationSuspended Furnace / Crawl Space Installation Typical Suspended Furnace / Crawl Space InstallationFilter Installation Attempt to install filters inside the furnaceSection III Filters Btuh kWGAS Safety GAS Piping InstallationSection IV GAS Piping Side ReturnHigh Altitude Pressure Switch Conversion GAS Orifice Conversion for Propane LPHigh Altitude GAS Orifice Conversion Manifold Pressures in wcSection V Electrical Power Electrical Power ConnectionsLOW Voltage Control Wiring Connections Supply Voltage ConnectionsThermostat ID ModelsSingle Stage PSC AIR Furnace Conditioner OD Models Single Stage PSC FurnaceSingle Stage Heat Pump Section VI Twinning and Staging Staging Section VII Vent SystemVent Connections Category 1 450 F. MAX. Vent Temp VentingVenting Into AN Existing Chimney FAN-ASSISTED Combustion SystemVent and Supply Outside Air Safety Check Procedure Air Supply Openings and DuctsVentilated Combustion Air Free AreaSection Viii START-UP Adjustments NOx Screen Removal Lo-NOx Models OnlyIgnition System Sequence GAS Piping Leak CheckCalculating the Furnace Input Natural GAS Seconds For Revolution Cu FtRevolution Adjustment of Manifold GAS Pressure & Input Rate Read the inlet gas pressureRead the manifold gas pressure Nominal Manifold PressureAdjustment of FAN Control Settings Adjustment of Temperature RiseManifold Pressure U Tube Connection Bottom Airflow Data Scfm 757 733 694 659 575 444 399 707 684 641 604 495 397 282 High 1371 1323 12511086 971 843 521 060A10 Medium High 1249 1207 1098 1018 921 669 503Section IX Safety Controls Furnace Control Diagnostics Section X Replacement Parts List Diagnostic Fault Code Storage and RetrievalSection XI Wiring Diagram Wiring DiagramJohnson Controls Unitary Products York Drive Norman, OK

TG8S*MP, GG8S*MP, TGLS*MP, GGLS*MP specifications

Johnson Controls is a leader in the development of innovative building management solutions, and its product line encompassing the GGLS*MP, TGLS*MP, TG8S*MP, and GG8S*MP series exemplifies this commitment to excellence. These devices are designed to optimize energy efficiency, enhance occupant comfort, and ensure seamless integration into commercial building infrastructures.

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In contrast, the TGLS*MP series emphasizes the importance of temperature regulation and comfort in residential or smaller commercial settings. These controllers utilize advanced algorithms to maintain optimal indoor climates, adjusting heating and cooling outputs in response to ambient conditions. The intuitive user interface makes it easy for users to customize their settings, providing enhanced comfort without sacrificing energy efficiency.

The TG8S*MP series is particularly renowned for its robust communication features. These devices support multiple communication protocols, allowing them to integrate smoothly with existing building management systems. This versatility ensures that customers can leverage their current infrastructure while benefiting from new technology. Additionally, the TG8S*MP includes remote monitoring capabilities, enabling facility managers to track performance metrics and troubleshoot issues from anywhere.

Lastly, the GG8S*MP series brings together security and control features, ensuring that buildings are not only energy-efficient but also secure. With capabilities for access control and monitoring, these devices provide a comprehensive solution for managing facility safety. Their integration with lighting and HVAC systems further enhances overall efficiency, creating a comfortable and secure environment for all occupants.

In summary, Johnson Controls’ GGLS*MP, TGLS*MP, TG8S*MP, and GG8S*MP series presents cutting-edge technologies designed for energy efficiency, ease of use, and versatility. By focusing on comprehensive building management, these products provide optimal performance that aligns with sustainability objectives while enhancing comfort and security. Whether in commercial or residential settings, Johnson Controls continues to lead the way in the intelligent building sector.