It is very important to use the model and manufacturing numbers at all times when requesting service or parts information. Product Type G: Gas Furnace Supply Type C: Counterflow/Horizontal M: Upflow/Horizontal...
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PRODUCT IDENTIFICATION The model and manufacturing number are used for positive identification of component parts used in manufacturing. When engineering and manufacturing changes take place where interchangeability of components are affected, the manufactur- ing number will change. * Indicates minor revision & is not used for order entry or inventory management The United States Environmental Protection Agency (“EPA”) has issued various regulations re- WARNING WARNING...
PRODUCT DESIGN General Operation The GKS9 furnaces are equipped with an electronic ignition device used to light the burners and an induced draft blower to exhaust combustion products. An interlock switch prevents furnace operation if the blower door is not in place. Keep the blower access door in place except for inspection and maintenance.
COMPONENT IDENTIFICATION 1 Gas Valve 2 Gas Line Entrance (Alternate) 3 Combustion Air Intake Connection / “Coupling” 4 Hot Surface Igniter 5 Burners 6 Rollout Limit 7 Flame Sensor 8 Flue Pipe Connection / “Coupling” 9 Flue Pipe (Internal) 10 Primary Limit 11 Pressure Switch 12 Gas Line Entrance 13 Rubber Elbow...
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GKS90703BX* GKS90704CX* GKS90904CX* GKS90905DX* GKS91155DX* NOTE: Airflow area will be reduced by approximately 18% if duct flanges are not unfolded. This could cause performance issues and noise issues. GKS9 (DISCHARGE) INTAKE PIPE 2" PVC UNFOLDED FLANGES FOLDED FLANGES FRONT VIEW...
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Note: All negative pressure readings are in inches of water column (" w.c.). * GKS9 furnaces are shipped without coil cover pressure switches. All GKS9 models are shipped from the factory as Dedicated Upflow but can be installed as a Horizontal Left or a Horizontal Right, ONLY after installing GKS9 Horizontal Installation Kit 0270K00012, which contains Pressure Switch 20197312.
PRODUCT DESIGN Part Number Open Setting (°F) GKS90453BX* GKS90703BX* GKS90704CX* GKS90904CX* GKS90905DX* GKS91155DX* Open Setting (°F) T.O.D. PRIMARY LIMIT 20162903 20162904 ROLLOUT LIMIT SWITCHES 10123514 Part Number 10123533 Open Setting (°F) GKS90453BX* GKS90703BX* GKS90704CX* GKS90904CX* GKS90905DX* GKS91155DX* AUXILIARY LIMIT SWITCHES Part Number 10123519 GKS90453BX*...
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• All CAPF coils have a CAUF equivalent. • All CHPF coils in B, C & D heights have an insulated Z bracket for use with one size smaller furnace. • All proper coil combinations are subject to being ARI rated with a matched outdoor unit.
NOTE: Complete lineup of thermostats can be found in the Thermostat Specification Sheets. Filters: Filters are required with this furnace and must be provided by the installer. The filters used must comply with UL900 or CAN/ULCS111 standards. Installing this furnace without filters will void the unit warranty.
These furnaces are manufactured for natural gas operation. Optional kits are available for conversion to propane operation. For elevations above 2000 feet the rating should be reduced by 4% for each 1000 feet above sea level. The furnace must not be derated, orifice changes should only be made if necessary for altitude.
(MED-HI) MED-LO CFM in chart is without filters(s). Filters do not ship with this furnace, but must be provided by the installer. If the furnace requires two return filters, this chart assumes both filters are installed. All furnaces ship as high speed cooling. Installer must adjust blower cooling speed as needed.