Bard WG3S2-A Installation Instructions Manual

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Manual 2100-587DPage 9 of 581. IMPORTANTThe equipment covered in this manual is to beinstalled by trained, experienced service andinstallation technicians. All duct work or portionsthereof not in the conditioned space should be properlyinsulated in order to both conserve energy and preventcondensation or moisture damage.2. APPLICATIONThis is a fan-assisted forced air gas furnace with electricair conditioning for outdoor installation. A fan-assistedfurnace is equipped with an integral mechanical meansto draw products of combustion through the combustionchamber and heat exchanger. The furnace installationmust conform with local building codes and ordinancesor, in their absence, with the National Fuel Gas CodeANSI Z223.1 or CAN/CGA-B149.1, latest edition,and the National Electrical Code ANSI/NFPA-7 or CSAC22.1, latest edition. It is the personal responsibilityand obligation of the purchaser to contact a qualifiedinstaller to assure that installation is adequate and is inconformance with governing codes and ordinances.3. DUCT WORKThe unit is designed for use with or without duct work(see Warning on this page). Flanges are providedfor attaching the supply and return ducts. Theseinstructions explain the recommended method toinstall the air cooled self-contained electric airconditioning and gas heating unit and the electricalwiring connections and gas piping to the unit. Therefrigerant system is completely assembled andcharged. All internal wiring is complete.These instructions and any instructions packaged withany separate equipment required to make up the entireheating/cooling system should be carefully read beforebeginning the installation. Note particularly “StartingProcedure” and any tags and/or labels attached to theequipment.All duct work, supply and return, must be properlysized for the design airflow requirement of theequipment. Air Conditioning Contractors of America(ACCA) is an excellent guide to proper sizing.Refer to Table 9 in this Manual for maximum staticpressure available for duct design.See Figure 3 and clearance information in Section 9and Table 2 for additional information.Design the duct work according to methods given bythe Air Conditioning Contractors of America (ACCA).When duct runs through unheated spaces, it shouldbe insulated with a minimum of 1" of insulation. Useinsulation with a vapor barrier on the outside of theinsulation. Flexible joints should be used to connectthe duct work to the equipment in order to keep thenoise transmission to a minimum.A 1” clearance to combustible material for thefirst 3’ of duct attached to the outlet air frameis required. See Wall Mounting Instructions andFigures 2, 2A, 3 and 3A for further details.Ducts through the walls must be insulated and alljoints taped or sealed to prevent air or moistureentering the wall cavity.Some installations may not require any return airduct. A metallic return air grille is required withinstallations not requiring a return air duct. Thespacing between louvers on the grille shall not belarger than 5/8”.Any grille that meets with the 5/8” louver criteriamay be used. It is recommended that Bard ReturnAir Grille or Return Filter Grille be installed whenno return duct is used. Contact distributor orfactory for ordering information. If using a returnair filter grille, filters must be of sufficient size toallow a maximum velocity of 400 fpm.NOTE: If no return air duct is used, applicableinstallation codes may limit this cabinet toinstallation only in a single story structure.4. HIGH ALTITUDE APPLICATIONSRatings of gas utilization equipment are based onsea level operation and need not be changed foroperation at elevations up to 6,000’ . For operation atelevations above 6,000’ and in the absence of specificrecommendations from the local authority havingjurisdiction, equipment ratings shall be reduced asspecified in Section 21.WARNINGIn all cases, there must be a metal ductconnection made to the supply air flange,and a 1" clearance to combustibles must bemaintained to this duct connection.For free blow applications, a metal sleevemust be used in the wall opening itself, againmaintaining a 1" clearance to combustibles.Failure to use the sheet metal can cause fireresulting in property damage, injury, or death.INSTALLATION