Johnson Controls GG8S*MP Critical Coil Projection, Coil / Furnace Assembly HC Series Coils

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356485-UIM-G-1211

CRITICAL COIL PROJECTION

The coil assembly must be located in the duct such that a minimum dis- tance is maintained between the top of the coil and the top of the duct. Refer to Table 2.

COIL / FURNACE ASSEMBLY - HC SERIES COILS

These coils are supplied ready to be installed in a right hand position or a left hand position. When used in conjunction with a horizontal furnace (blow through) application, the coil should be oriented with the opening of the “A” coil closest to the furnace. See Figure 7.

NOTICE

Each coil is shipped with an external tie plate that should be used to secure the coil to the furnace. It should be installed on the back side of the coil using the dimpled pilot holes. See Figure 7.

Use tie plate

supplied with coil

Gas Furnace

FIGURE 7: Horizontal Left or Right application (Right Shown)

DOWNFLOW DUCT CONNECTORS

All downflow installations must use a suitable duct connector approved by the furnace manufacturer for use with this furnace. The duct connec- tors are designed to be connected to the rectangular duct under the floor and sealed. Refer to the instructions supplied with the duct con- nector for proper installation. Refer to the separate accessory parts list at the end of these instructions for the approved accessory duct con- nectors.

FURNACE

WARM AIR PLENUM

WITH 1” FLANGES

RESIDENTIAL AND MODULAR HOME UPFLOW RETURN PLENUM CONNECTION

Return air may enter the furnace through the side(s) or bottom depend- ing on the type of application. Return air may not be connected into the rear panel of the unit.

SIDE RETURN APPLICATION

Side return applications pull return air through an opening cut in the side of the furnace casing. This furnace is supplied with a bottom block- off panel that should be left in place if a side return is to be used. If the furnace is to be installed on a flat, solid surface, this bottom panel will provide an adequate seal to prevent air leakage through the unused bottom opening. However, if the furnace is to be installed on a surface that is uneven, or if it is to be installed on blocks or otherwise raised off the floor, it will be necessary to seal the edges of the bottom panel to the casing using tape or other appropriate gasket material to prevent air leakage.

BOTTOM RETURN AND ATTIC INSTALLATIONS

Bottom return applications normally pull return air through a base plat- form or return air plenum. Be sure the return platform structure or return air plenum is suitable to support the weight of the furnace.

The internal bottom panel must be removed for this application.

Attic installations must meet all minimum clearances to combustibles and have floor support with required service accessibility.

DOWNFLOW APPLICATION

For downflow applications, the furnace must be turned upside-down so that the circulating air enters at the top and exits the furnace at the bot- tom. The combustion air inducer must be rotated 90° as shown in Fig- ure 22. DO NOT BLOCK COMBUSTION AIR INLET OPENINGS.

HORIZONTAL APPLICATION

FIGURE 9: Horizontal Application

This furnace may be installed in a horizontal position on either side as shown above. It must not be installed on its back.

ATTIC INSTALLATION

FIBERGLASS

INSULATION

FIBERGLASS TAPE

UNDER FLANGE

COMBUSTIBLE FLOOR

BASE ACCESSORY

FIGURE 8: Combustible Floor Base Accessory

Line contact only permissible between lines formed by the intersection of furnace top and two sides and building joists, studs or framing

Filter rack

 

must be a minimum

 

distance

Gas Piping

of 18” (45.7 cm)

 

from the

 

furnace

 

Supply

Air

Vent (Maintain required clearances to combustibles)

 

Sheet metal in

 

front of furnace

 

combustion air

12”

Openings is

 

 

Recommended

12

30” MIN. Work Area

Return

AirSediment

Trap

FIGURE 10: Typical Attic Installation

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 PrecautionsAnce to a 50 HZ Power Supply or a Voltage Above 130 Volts Codes and Standards Combustion AIR Quality List of ContaminantsFurnace Location and Clearances InspectionDirectly BELOW. Keep Clear of ALL OBSTRUC- Tions 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 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 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 AdjustmentsIgnition System Sequence GAS Piping Leak CheckCalculating the Furnace Input Natural GAS Seconds For Revolution Cu FtRevolution Nominal Manifold Pressure Adjustment of Manifold GAS Pressure & Input RateRead the inlet gas pressure Read the manifold gas pressureAdjustment of FAN Control Settings Adjustment of Temperature RiseManifold Pressure U Tube Connection 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.

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