8.93 MANUAL OPERATION OF FAN SYSTEM RETURN FAN SUPPLY FAN ________ HWS HWR RETURN AIR SUPPLY AIR TO REHEAT COILS CWR CWS SPRAY PUMP OUTDOOR AIR EXHAUST AIR MANUAL VALVE MANUAL VALVE OFF ON MIXED AIR -1- How would you adjust the manual damers to address minimum ventilation and free cooling requirements? What would be the minimum mixed air temperature? -2- How would you control the manual heating and cooling valves? What would be the lowest target supply air temperature? Under what conditions would you allow flow into the heatign coil? -3- How would you use the humidity spray pump? What would a normal range be for return air relative humidity? -4-If the mixed air is at target, for example 58˚F, and the supply air temperature was at 60˚F from fan heat gain,what would the supply air temperature do when the humidity sprays are activated? -5- What action would be taken to maintain the supply air temperature at 60˚F? V WATER SOURCE
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