1-866-933-7486Quest PowerDry 385D Pro Installation, Operation and Maintenance Instructions5www.QuestProtect.comsales@Questprotect.comquestquest2. Operation2.1 How the Quest PowerDry 385D Pro worksYour Quest PowerDry 385D Pro has two separate air streams that run through it – Process (Fig. 1) and Reactiva-tion (Fig. 2).Note: Check for airflow at all inlets and outlets. DO NOT run unit if no airflow is detected.Process Air Stream:P1 – 385 CFM of air enters (12”flex) the top of themachine and...P2 – ...water vapor from incoming air is deposited onthe desiccant wheel.P3 – 385 CFM of dry air exits (10” lay flat) the machine.Reactivation Air Stream:R1 – 75 CFM of air enters (6”flex) the lower-side ofthe machine and...R2 – passes over the heater coils.R3 – Water vapor is picked up from the desiccantwheel by the hot air and...R4 – ...75 CFM of wet air exits (6”flex) the machine.2.2 Avoiding Over-dryingThe PowerDry 385D Pro is a powerful toolcapable of removing a great deal of water frommost environments. Care must be taken to avoidsecondary damages of over-drying and or unexpectedcondensation. Your Quest PowerDry 385D Proremoves vapor water from the incoming process air stream(Fig. 1) and transfers it to the outgoing reactivation air stream (Fig. 2).The reactivation exhaust air is hot and wet.Take care to prevent the reactivation exhaust air stream from causing secondary damage due tocondensation.If the reactivation exhaust air stream cools below its dewpoint liquid water will condense inside the duct workcreating puddles. If the reactivation exhaust air stream is not exhausted completely from the structure it canalso cause secondary water damage.Your Quest PowerDry 385D Pro does not produce liquid water internal to the machine. There is nocondensate pump and no drain hose.The PowerDry 385D Pro desiccant dehumidifier will continue to remove water from already dry, cold air. It ispossible to over-dry objects and or structures.Figure 1: Desiccant process air stream.Figure 2: Desiccant reactivation air stream.P1P2P3