Quest Engineering PowerDry 385D Pro Installation, Operation And Maintenance Instructions - Quest
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Quest PowerDry 385D Pro
Installation, Operation and Maintenance Instructions
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2. Operation
2.1 How the Quest PowerDry 385D Pro works
Your 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 the
machine and...
P2 – ...water vapor from incoming air is deposited on
the 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 of
the machine and...
R2 – passes over the heater coils.
R3 – Water vapor is picked up from the desiccant
wheel by the hot air and...
R4 – ...75 CFM of wet air exits (6”flex) the machine.
2.2 Avoiding Over-drying
The PowerDry 385D Pro is a powerful tool
capable of removing a great deal of water from
most environments. Care must be taken to avoid
secondary damages of over-drying and or unexpected
condensation. Your Quest PowerDry 385D Pro
removes 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 to
condensation.
If the reactivation exhaust air stream cools below its dewpoint liquid water will condense inside the duct work
creating puddles. If the reactivation exhaust air stream is not exhausted completely from the structure it can
also cause secondary water damage.
Your Quest PowerDry 385D Pro does not produce liquid water internal to the machine. There is no
condensate pump and no drain hose.
The PowerDry 385D Pro desiccant dehumidifier will continue to remove water from already dry, cold air. It is
possible to over-dry objects and or structures.
Figure 1: Desiccant process air stream.
Figure 2: Desiccant reactivation air stream.
P1
P2
P3