York P*XU/G9D-UP Installation Instruction

Contents

035-17480-000 Rev. A (800)Unitary Products Group 5The size of the unit should be based on an acceptable heatloss calculation for the structure. ACCA, Manual J or otherapproved methods may be used.Refer to furnace rating plate for the type of gas approved forthis furnace - only use those approved gases.Check the rating plate and power supply to be sure that theelectrical characteristics match. All models use nominal 115VAC, 1 Phase, 60 Hertz power supply.For installations above 2,000 feet, reduce input 4% for each1,000 feet above sea level. Refer to Form 650.75-N2.1V forcorrect pressure switch/orifice or other required conversioninformation.The furnace shall not be connected to a chimney flue servinga separate appliance designed to burn solid fuel.A furnace installed in a residential garage shall be located sothat all burners and burner ignition devices are located notless that 18" above the garage floor, and located or protectedto prevent damage by vehicles.Allow clearances from combustible materials as listed underClearances to Combustibles, ensuring that service access isallowed for both the burners and blower.The furnace shall be located using these guidelines:1. Where a minimum amount of air intake/vent piping andelbows will be required.2. As centralized with the air distribution as possible.3. Where adequate combustion air will be available (partic-ularly when installing as 1-pipe system).4. In an area where ventilation facilities provide for safe lim-its of ambient temperature under normal operating condi-tions. Ambient temperatures must not fall below 32°F(0°C) unless the condensate system is protected fromfreezing (refer to “BELOW FREEZING LOCATIONS”section on page 5).5. Where it will not interfere with proper air circulation in theconfined space.6. Where the outdoor combustion air/vent terminal will notbe blocked or restricted.7. Where sufficient space is provided to allow properaccess to the appliance. Minimum recommendedaccess clearances are as follows:Twenty-four (24) inches between the front of the furnaceand an adjacent wall or another appliance, when accessis required for servicing and cleaning.Eighteen (18) inches at the side where access isrequired for passage to the front when servicing or forinspection or replacement of flue/vent connections.8. Where it will not interfere with the cleaning, servicing orremoval of other appliances.NOTE:In all cases, accessibility clearances shall take prece-dence over clearances for combustible materials whereaccessibility clearances are greater .CLEARANCES TO COMBUSTIBLESMinimum clearances from combustible construction areshown in Table 2, “UNIT CLEARANCES TO COMBUSTI-BLES (all dimensions in inches),” on page 7. These minimumclearances must be maintained in the installation.BELOW FREEZING LOCATIONSIf this furnace is installed in any area where the ambient tem-perature may drop below 32° F, a UL listed self regulatedheat tape must be installed on any condensate drain lines. Itis recommended that self regulating heat tape rated at 3watts per foot be used. This must be installed around the con-densate drain lines in the unconditioned space. Always installthe heat tape per the manufacturer's instructions. Cover theself-regulating heat tape with fiberglass or other heat resis-tant, insulating material.DUCTWORKThe duct system's design and installation must:1. Handle an air volume appropriate for the served spaceand within the operating parameters of the furnace spec-ifications.2. Be installed in accordance with standards of NFPA(National Fire Protection Association) as outlined inNFPA pamphlets 90A and 90B (latest editions) or appli-cable national, provincial, local fire and safety codes.3. Create a closed duct system. The supply duct systemmust be connected to the furnace outlet and the returnduct system must be connected to the furnace inlet. Bothsupply and return duct systems must terminate outsidethe space containing the furnace.4. Generally complete a path for heated or cooled air to cir-culate through the air conditioning and heating equip-ment and to and from the conditioned space.If this unit is installed in an unconditioned spaceand an extended power failure occurs, there willbe potential damage to the condensate trap, drainlines and internal unit components. Following apower failure situation, Do Not Operate the UnitUntil Inspection and Repair Are Performed.The cooling coil must be installed in the supply airduct downstream of the furnace.