What are the considerations for the illustrated system regarding safety of the mechanical components? What are the considerations for the illustrated system regarding energy use? What is a typical application of the type of system illustrated? How would you manually operate this fan system to address ventilation, comfort and energy use requirements under these different conditions? (1) At unoccupied times when the outside air (OSA) temperature is below 35°F? (2) At occupied times when the OSA temperature is below 35°F? (3) At unoccupied times when the OSA temperature is above 35°F? (4) At occupied times when the OSA temperature is above 35°F? 7.48 MANUAL ADJUSTMENT OF A 100% OUTSIDE AIR FAN DM1 DM2 PRV1 PRV2 PRV3 PRV4 PRV5 NC NO NC OUTSIDE AIR NO V1 V2 V3 FACE & BYPASS DAMPERS CWR CWS HWR HWS C NC NO NC C NO SUPPLY FAN SUPPLY AIR MAIN AIR
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