Manual 2100-590APage 3 of 67CONTENTSFIGURESFigure 1 Unit Dimensions ..................................... 9Figure 2 Mounting Instructions – W24-36G ....... 12Figure 2A Mounting Instructions – W42-60G ....... 13Figure 3 Combustible Clearance – W24-36G .... 14Figure 3A Combustible Clearance – W42-60G .... 14Figure 4 Wall Mounting Instructions ................... 15Figure 5 Wall Mounting Instructions ................... 15Figure 6 Common Wall Mounting Installations ... 16Figure 7 Location of Vent Terminal in Shipping .. 17Figure 8 Vent Terminal & CombustionAir Intake .............................................. 18Figure 9 Fresh Air Damper ................................. 19Figure 10 Installation of Flexible Conduit ............. 21Figure 11 Low Voltage Wiring-No Vent Pkg. ........ 22Figure 12 Low Voltage Wiring .............................. 23Figure 13 Low Voltage Wiring-EIFM Econo. ........ 24Figure 14 Gas Pipe Connection ........................... 25Figure 15 Proper Piping Practice ......................... 26Figure 16 Access Internal Filter throughUpper Service Door .............................. 33Figure 17 Lighting & Shutdown Instruction Label . 35Figure 18 Top View of Gas Control ...................... 36Figure 19 Sequence of Operation – ElectronicBlower Control ...................................... 38Figure 20 Furnace Control Board &Blower Control ...................................... 39Figure 21 Fan Blade ............................................. 48Figure 22 Low NOx Insert .................................... 48TABLESTable 1 Specifications – W24-36G Models ........... 7Table 1A Specifications – W42-60G Models ........... 8Table 2 Minimum Installation Clearances ........... 17Table 3 Thermostat Wire Size ............................ 21Table 4 Wall Thermostat ..................................... 21Table 5 Length of Standard Pipe Threads .......... 26Table 6 Gas Pipe Sizes – Natural Gas ............... 26Table 7 Natural Gas Derate CapacitiesFor All Models ........................................ 29Table 8 Natural Gas Orifice Tables – W24-36G .. 30Table 8A Natural Gas Orifice Tables – W42-60G .. 31Table 9 Motor Speed Taps .................................. 39Table 10 W24G Indoor Blower Performance ........ 40Table 11 W30G Indoor Blower Performance ........ 41Table 12 W36G Indoor Blower Performance ........ 42Table 13 W42G Indoor Blower Performance ........ 43Table 14 W48G Indoor Blower Performance ........ 44Table 15 W60G Indoor Blower Performance ........ 45Table 16 Integrated Furnace & BlowerControl Operation ................................... 46Table 17A W24G2-W36G2Cooling Pressure Table .......................... 47Table 17B W42G2-W60G2Cooling Pressure Table .......................... 47Table 18 Fan Blade Dimension ............................. 48Page Page