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The hot leg of the 120V power supply must be con-nected to the black power lead as indicated on the wir- HORIZONTAL FURNACE GAS PIPING MAY BE FROM EITHER SIDE (UPFLOW SHOWN) AUTOMATIC GAS VALVE WITH MANUAL SHUTOFF MAIN MANUAL SHUTOFF VALVE GROUND UNION JOINT
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Chapter 7: Heating, Ventilation, Air Conditioning (HVAC) 105 Most homes in Kentucky have a choice of the following approaches for central, forced-air systems; fuel-
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hastingshvac.com Engineer PDH Course#1 Educational Materials Direct Gas-Fired Air Heating Systems Page 2 of 19 ©2005, Hastings HVAC, Inc. Geoffrey W. McLean, PE