Manual 2100-587CPage 3 of 59CONTENTSFIGURESFigure 1 Unit Dimensions ...................................... 8Figure 2A Mounting Instructions – WG3S2............ 11Figure 2B Mounting Instructions–WG4S2 & WG5S2 .....12Figure 3 Combustible Clearance ......................... 13Figure 4 Wall Mounting Instructions .................... 14Figure 5 Wall Mounting Instructions .................... 14Figure 6 Common Wall Mounting Installations .... 15Figure 7 Location of Vent Terminal in Shipping ... 16Figure 8 Vent Terminal & CombustionAir Intake ............................................... 17Figure 9 Installation of Flexible Conduit .............. 20Figure 10A Low Voltage Wiring - No Vent................ 21Figure 10B Low Voltage Wiring - CRV .................... 22Figure 10C Low Voltage Wiring - Economizer ........ 23Figure 10D Low Voltage Wiring - ERV .................... 24Figure 11 Gas Pipe Connection ............................ 25Figure 12 Proper Piping Practice ........................... 26Figure 13 Access Internal Filter ............................. 32Figure 14 Lighting & Shutdown Instruction Label ... 34Figure 15 Top View of Gas Control ........................ 35Figure 16 Sequence of Operation – ElectronicBlower Control ....................................... 37Figure 17 Furnace Control Board &Blower Control ....................................... 38Figure 18 Fan Blade .............................................. 42Figure 19 Control Disassembly ............................. 44Figure 20 Winding Test .......................................... 44Figure 21 Drip Loop ............................................... 44Figure 22 Low NOx Insert ...................................... 46TABLESTable 1 Specifications ............................................7Table 2 Minimum Installation Clearances ............16Table 3 Thermostat Wire Size ..............................20Table 4 Wall Thermostat ......................................20Table 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– WG3,4,5S ...30Table 8A Natural Gas Orifice Tables ......................30Table 9 Indoor Blower Performance.....................38Table 10 Integrated Furnace & BlowerControl Operation ....................................39Table 11 Fan Blade Dimensions ............................42Table 12 Cooling Pressures ...................................45Page Page