Johnson Controls GG9S*MP, TG9S*MP installation manual Section X Safety Controls

Page 31

364861-UIM-B-0708

ADJUSTMENT OF TEMPERATURE RISE

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 Table 6, "Ratings & Physical / Electrical Data".

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.

TWIN

Blower Off Delay Timer

 

 

 

 

Adjustment Jumper

180

120

90

60

(in seconds)

Y/Y2

DELAY

BLOWER OFF

 

 

 

 

W

 

 

 

 

R

 

 

 

 

G

 

 

 

 

C

 

 

 

FIGURE 40: Furnace Control Board

SECTION X: SAFETY CONTROLS

CONTROL CIRCUIT FUSE

A 3-amp fuse is provided on the control circuit board to protect the 24- volt transformer from overload caused by control circuit wiring errors. This is an ATO 3, automotive type fuse and is located on the control board.

BLOWER DOOR SAFETY SWITCH

Main power to the unit must still be interrupted at the main power disconnect switch before any service or repair work is to be done to the unit. Do not rely upon the interlock switch as a main power dis- connect.

Blower and burner must never be operated without the blower panel in place.

This unit is equipped with an electrical interlock switch mounted in the burner compartment. This switch interrupts all power at the unit when the panel covering the blower compartment is removed.

Electrical supply to this unit is dependent upon the panel that covers the blower compartment being in place and properly positioned.

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 40, "Furnace Control Board", and the unit-wir- ing label to change the blower speed. To use the same speed tap for heating and cooling, the heat terminal and cool terminal must be con- nected 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 40, "Furnace Control Board".

PARK PARK

HI COOL

HEAT

EAC-H

L1

XFMR

NEUTRALS

HUM

ROLLOUT SWITCH CONTROLS

These controls are mounted on the burner assembly. If the temperature in the area surrounding burner exceeds its set point, the gas valve is de-energized. The operation of this control indicates a malfunction in the combustion air blower, heat exchanger or a blocked vent pipe con- nection. Corrective action is required. These are manual reset controls that must be reset before operation can continue.

PRESSURE SWITCHES

This furnace is supplied with two pressure switches, which monitor the flow through the combustion air/vent piping and condensate drain sys- tem. These switches de-energize the gas valve if any of the following conditions are present. Refer to "CONDENSATE PIPING AND FUR- NACE VENTING CONFIGURATION" for tubing connections.

1.Blockage of vent piping or terminal.

2.Failure of combustion air blower motor.

3.Blockage of combustion air piping or terminals.

4.Blockage of condensate drain piping.

Johnson Controls Unitary Products

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Contents List of Tables Section I SafetyList of Sections List of FiguresSafety Requirements Specific Safety Rules and PrecautionsCombustion AIR Quality List of Contaminants Inspection Codes and StandardsDirectly BELOW. Keep Clear of ALL OBSTRUC- Tions Furnace Location and Clearances Section II DuctworkDuctwork General Information Furnace Assembly MC & FC Series Coils Floor Base and Ductwork Installation DownflowCoil Installation COIL/FURNACE Assembly MC/FC/PC Series CoilsCoil / Furnace Assembly HC Series Coils Coil Flange InstallationFurnace Assembly MC Series Coils only Furnace Assembly PC Series CoilsHorizontal Application Downflow Duct Connectors Attic InstallationBottom Return and Attic Installations Suspended Furnace / Crawl Space InstallationBtuh kW Nominal Filter InstallationCabinet Dimensions Inches Section III FiltersSide Return GAS SafetyGAS Piping Installation Section IV GAS PipingGAS Orifice Conversion for Propane LP Section V Electrical PowerHigh Altitude Pressure Switch Conversion Electrical Power ConnectionsSupply Voltage Connections LOW Voltage Control Wiring ConnectionsAfue AC 5D HP 2C Section VI Twinning and Staging Single-Wire Staging Operation Single-Wire Twinning OperationSingle-Wire Staging Single-Wire Staging InstructionsCondensate Drain Termination Condensate Drain LocationCondensate Drain Trap and Drain Freeze Protection Inducer Rotated for Right Side Venting Airflow Horizontal Left Inducer Rotated Horizontal Right Inducer Rotated Section Viii Combustion AIR and Vent System Combustion AIR and Vent SafetyCombustion AIR/VENT Pipe Sizing Furnace Vent Connection Sizes Combustion AIR and Vent Piping AssemblyCombustion AIR / Venting Fitting Equivalent LengthHome Layout Vent ClearancesVent Applications and Termination Vent SystemVenting Multiple Units Ambient Combustion Air Supply Combustion AIR SupplyOutdoor Combustion Air Combustion Air Source From OutdoorsFree Area Air Supply Openings and DuctsVent Blower Rotation Specially Engineered InstallationsVentilated Combustion Air Ventilated Combustion Air TerminationCalculating the Furnace Input Natural GAS Section IX START-UP AdjustmentsGAS Piping Leak Check Ignition System SequenceSeconds For Seconds For Size of Test Dial Revolution Cu FtRevolution Cu Ft Inlet GAS Pressure Range Adjustment of Manifold GAS Pressure & Input RateRead the inlet gas pressure Read the manifold gas pressureSection X Safety Controls Sequence of Operation TroubleshootingFurnace Control Diagnostics Limit ControlsDiagnostic Fault Code Storage and Retrieval Section XI Replacement Parts List Section XII Wiring Diagram Johnson Controls Unitary Products York Drive Norman, OK Factory Heating Models ESP Nominal Size awg @ Over Current AmpsProtection Med-LoHorizontal Right

TG9S*MP, GG9S*MP specifications

Johnson Controls has long been at the forefront of building efficiency solutions, and their TG9S*MP and GG9S*MP series exemplify this commitment. These two-stage, multi-position gas furnaces are designed for optimal comfort and performance in residential applications, and they come packed with a variety of features that enhance their efficiency and operational capabilities.

One of the standout features of the TG9S*MP and GG9S*MP furnaces is their efficient two-stage operation. This technology allows the unit to operate at a lower capacity most of the time, which translates into reduced energy consumption and costs. When the demand for heating increases, the furnace automatically shifts to a higher capacity, ensuring a consistent and comfortable indoor temperature. This flexibility not only enhances comfort but also extends the lifespan of the unit as it doesn't have to work harder than necessary.

Energy efficiency is a crucial characteristic of both models. With an Annual Fuel Utilization Efficiency (AFUE) rating of up to 96%, these furnaces convert a significant amount of the fuel they consume into usable heat. Such efficiency ratings not only help in reducing energy bills but also have a positive impact on the environment by minimizing greenhouse gas emissions.

Both models feature advanced technology in their design, including a fully modulating gas valve and a variable-speed blower motor. The modulating valve adjusts the gas flow in response to the thermostat’s signals, allowing for precise temperature control and improved comfort. Meanwhile, the variable-speed blower motor enhances airflow while operating quietly, significantly improving overall indoor air quality by promoting even heat distribution throughout the home.

From a structural standpoint, the TG9S*MP and GG9S*MP are built with durable materials designed for longevity. Their compact design allows for flexible installation options, whether in a closet, attic, or basement. The furnaces also come equipped with a robust heat exchanger crafted from high-quality materials, which ensures both reliability and efficiency.

In conclusion, the Johnson Controls TG9S*MP and GG9S*MP furnaces provide homeowners with efficient, reliable, and comfortable heating solutions. With advanced features such as two-stage operation, impressive AFUE ratings, and modern technology integrations, these models stand out in the market as dependable options for both energy savings and year-round comfort. Whether you're a homeowner looking to upgrade your heating system or a contractor seeking high-quality products for your clients, these furnaces represent a smart choice.
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