Johnson Controls GG8S*MP Adjustment of Temperature Rise, Adjustment of FAN Control Settings

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356485-UIM-G-1211

MANIFOLD PRESSURE “U” TUBE CONNECTION

 

OUTLET

 

 

PRESSURE TAP

 

GAS VALVE

1/4” TUBING

 

 

 

 

FLAME

 

 

MAINIFOLD

 

 

PIPE

SENSOR

 

 

 

 

 

 

3.5 IN

 

 

 

WATER

 

 

 

COLUMN

GAS

 

 

GAS

 

U-TUBE

PRESSURE

BURNERS

 

 

MANOMETER

SHOWN

 

 

FIGURE 26: Reading Gas Pressure

ADJUSTMENT OF TEMPERATURE RISE

DANGER

The temperature rise, or temperature difference between the return air and the supply (heated) air from the furnace, must be within the range shown on the furnace rating plate and within the application limitations shown in SECTION 6.

The supply air temperature cannot exceed the “Maximum Supply Air Temperature” specified in these instructions and on the fur- nace rating plate. Under NO circumstances can the furnace be allowed to operate above the Maximum Supply Air Temperature. Operating the furnace above the Maximum Supply Air Temperature will cause premature heat exchanger failure, high levels of Carbon Monoxide, a fire hazard, personal injury, property damage, and/or death.

After about 5 minutes of operation, determine the furnace temperature rise. Take readings of both the return air and the heated air in the ducts, about six feet (1.83 m) from the furnace where they will not be affected by radiant heat. Increase the blower speed to decrease the temperature rise; decrease the blower speed to increase the rise.

All direct-drive blowers have multi-speed motors. The blower motor speed taps are located on the furnace control board in the blower com- partment. Refer to Figure 27, and the unit-wiring label to change the blower speed. To use the same speed tap for heating and cooling, the heat terminal and cool terminal must be connected using a jumper wire and connected to the desired motor lead. Place all unused motor leads on park terminals. Two park terminals are provided.

Do not energize more than one motor speed at a time or damage to the motor will result.

ADJUSTMENT OF FAN CONTROL SETTINGS

This furnace is equipped with a time-on/time-off heating fan control. The fan on delay is fixed at 30 seconds. The fan off delay has 4 settings (60, 90, 120 and 180 seconds). The fan off delay is factory set to 120 sec- onds. The fan-off setting must be long enough to adequately cool the furnace, but not so long that cold air is blown into the heated space. The fan-off timing may be adjusted by positioning the jumper on two of the four pins as shown in Figure 27.

Blower Off Delay Timer (In seconds)

TWIN

 

 

 

 

 

 

 

PARK

PARK

180

120

90

60

HI COOL

 

DELAY

BLOWER OFF

 

Y/Y2

 

HEAT

 

 

 

 

W

 

 

 

EAC-H

 

 

 

 

R

 

 

 

 

G

 

 

 

L1

 

 

 

 

C

 

 

 

XFMR

 

 

 

 

 

 

 

 

NEUTRALS

 

 

 

HUM

 

FIGURE 27: Furnace Control Board

Johnson Controls Unitary Products

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Contents List of Tables Section I SafetyList of Sections List of FiguresAnce to a 50 HZ Power Supply or a Voltage Above 130 Volts Specific Safety Rules and PrecautionsSafety Requirements Codes and Standards Combustion AIR Quality List of ContaminantsDirectly BELOW. Keep Clear of ALL OBSTRUC- Tions InspectionFurnace Location and Clearances Ductwork General Information Floor Base and Ductwork Installation DownflowCoil Installation Section II DuctworkFurnace Assembly PC Series Coils COIL/FURNACE Assembly MC/FC/PC Series CoilsFurnace Assembly MC & FC Series Coils Coil Flange InstallationAttic Installation Coil / Furnace Assembly HC Series CoilsDownflow Duct Connectors Bottom Return and Attic InstallationsTypical Suspended Furnace / Crawl Space Installation Suspended Furnace / Crawl Space InstallationBtuh kW Filter InstallationAttempt to install filters inside the furnace Section III FiltersSide Return GAS SafetyGAS Piping Installation Section IV GAS PipingManifold Pressures in wc High Altitude Pressure Switch ConversionGAS Orifice Conversion for Propane LP High Altitude GAS Orifice ConversionSupply Voltage Connections Section V Electrical PowerElectrical Power Connections LOW Voltage Control Wiring ConnectionsSingle Stage PSC AIR Furnace Conditioner ID ModelsThermostat Single Stage Heat Pump Single Stage PSC FurnaceOD Models Section VI Twinning and Staging Vent Connections Section VII Vent SystemStaging FAN-ASSISTED Combustion System Category 1 450 F. MAX. Vent TempVenting Venting Into AN Existing ChimneyFree Area Vent and Supply Outside Air Safety Check ProcedureAir Supply Openings and Ducts Ventilated Combustion AirNOx Screen Removal Lo-NOx Models Only Section Viii START-UP AdjustmentsCalculating the Furnace Input Natural GAS GAS Piping Leak CheckIgnition System Sequence Revolution Revolution Cu FtSeconds For Nominal Manifold Pressure Adjustment of Manifold GAS Pressure & Input RateRead the inlet gas pressure Read the manifold gas pressureManifold Pressure U Tube Connection Adjustment of Temperature RiseAdjustment of FAN Control Settings Bottom Airflow Data Scfm 1098 1018 921 669 503 757 733 694 659 575 444 399707 684 641 604 495 397 282 High 1371 1323 1251 1086 971 843 521 060A10 Medium High 1249 1207Section IX Safety Controls Furnace Control Diagnostics Diagnostic Fault Code Storage and Retrieval Section X Replacement Parts ListWiring Diagram Section XI 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.

The GGLS*MP series focuses on the integration of advanced sensors and controllers that facilitate effective lighting and HVAC management. With built-in capabilities for occupancy sensing and daylight harvesting, these devices can automatically adjust settings based on real-time conditions. Their energy-efficient operation not only contributes to lower utility costs but also supports sustainability goals, making them ideal for modern green buildings.

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.

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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.
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