Lennox International Inc G24-200 installation instructions Page

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10− A vent connector shall be supported without any dips or sags and shall slope a minimum of 1/4inch (6.4 mm) per linear foot (305 mm) of connector, back toward the appliance. See local and national installation codes for support intervals and methods. National installation code in the U.S.A is current edition of National fuel Gas Code (ANSI−Z223.1/NFPA54). National installation codes in Canada are current editions of CSA−B149 codes.

11− Vent connectors shall be firmly attached to furnace flue collars by sheet metal screws or other approved means, except vent connectors of listed Type B vent material which shall be assembled according to the manufacturer’s instructions. Joints between sections of single wall connector piping shall be fastened by sheet metal screws or other approved means.

12− When the vent connector used for Category I ap- pliances must be located in or pass through a crawl space or other areas which may be cold, that portion of the vent connector shall be constructed of listed double−wall Type B vent material or material having equivalent insulation qualities.

13− All venting pipe passing through floors, walls, and ceil- ings must be installed with the listed clearance to com- bustible materials and be fire stopped according to local codes. In absence of local codes, refer to NFGC (Z223.1/NFPA54).

14− No portion of the venting system can extend into, or pass through any circulation air duct or plenum.

15− Vent connectors serving Category I appliances shall not be connected to any portion of mechanical draft systems operating under positive pressure such as Category III or IV venting systems.

16− If vent connectors are combined prior to entering the common vent, the maximum common vent capacity listed in the common venting tables must be reduced by 10 percent, the equivalent of one 90_ elbow (0.90 x maximum common vent capacity).

17− The common vent diameter must always be at least as large as the largest vent connector diameter.

18− In no case, shall the vent connector be sized more than two consecutive table size diameters over the size of the flue collar outlet.

19− Do not install a manual damper, barometric draft regu- lator or flue restrictor between the furnace and the chimney.

20− When connecting this appliance to an existing dedicated or common venting system, the venting system must be inspected for signs of corrosion and general condition. The sizing of the vent system must be reviewed and must conform to these instructions and the provided venting tables for the USA, and the appropriate venting tables in the standards of CSA B149.1 of the Natural Gas and Propane Installation Code for Canada. If the ex- isting system is in conflict with these requirements, the venting system must be resized.

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Contents 2P0805 INSTALLATION INSTRUCTIONS G24-200P504613M WHAT TO DO IF YOU SMELL GASPage G24−200 Unit Dimensions − inches mmSIDE VIEW G24−200 Filter Box Dimensions − inches mmBACK VIEW TOP VIEWPage G24−200 Parts ArrangementG24−200 HEAT SECTION AND CABINET Page G24−200 Parts Arrangement ContinuedG24−200 BLOWER SECTION Shipping and Packing List SafetyG24−200 Gas Furnace setting Combustion, Dilution & Ventilation Air GeneralCements and glues EQUIPMENT IN CONFINED SPACE ALL AIR FROM INSIDE Return Air Plenum / Filter Box Installation Setting EquipmentPage BOTTOM RETURN AIR FILTER BOX INSTALLATIONDuct System Blower Motor / Drive InstallationVenting Venting Using a Masonry Chimney Page Page Page SERVING A SINGLE CATEGORY I APPLIANCEPage SERVING A SINGLE CATEGORY I APPLIANCESERVING TWO OR MORE CATEGORY I APPLIANCES VENT CONNECTOR CAPACITYSERVING TWO OR MORE CATEGORY I APPLIANCES COMMON VENT CAPACITYPage CARBON MONOXIDE POISONING HAZARD Page FOR INSTALLATIONS IN THE USA AND CANADAVENT TERMINATION CLEARANCES Horizontal Venting Gas Piping FIRE OR EXPLOSION HAZARD Electrical Alternate make-up G24−200 FIELD WIRING DIAGRAM 120V SINGLE PH 60HZbox right side Alternate make-upG24-200FIELD WIRING DIAGRAM G UNITS − 460V 3PH 60HZ G24−200 FIELD WIRING DIAGRAMJ UNITS − 575V 3PH 60HZ Alternate make-upFIGURE Page P UNITS − 208/230V 1PH 60 HZ WIRING SCHEMATIC DIAGRAM FOR G24−200Y UNITS − 208/230V 3PH 60HZ G UNITS − 460V 3PH 60HZUnit Start−Up Heating Sequence of Operation High Altitude Information Gas Pressure AdjustmentOther Unit Adjustments and Operation Temperature Rise Setting blower CFM Page TABLE ACCESSORY AIR RESISTANCETABLE DRIVE KIT SPECIFICATIONS G24−200 Start−up and Performance Check List Repair Parts ListNORMAL HEATING MODE TroubleshootingABNORMAL HEATING MODE PageNORMAL HEATING MODE 3 − OFF NO POWER OR DETECTED FAULTABNORMAL HEATING MODE LED CODESPOWER ON THERMOSTAT CALLS FOR HEAT W1 ENERGIZED IS THE S10 S99 HIGH LIMIT CLOSED? YES FOR TWO CONDENSING UNITS COOLING SEQUENCE OF OPERATIONFOR A SINGLE CONDENSING UNIT MANUAL FAN OPERATION