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3-4 Setup Procedures
This section provides the procedures necessary for configuring your portable
drying/conveying system.
Configuration of your unit includes checking for proper blower rotation and installing the
optional aftercooler (on 60 cfm models). We recommend that you carry out these procedures
in the order given here.
Note: Before carrying out these procedures, install all equipment
as described in this section.
Checking for Proper Blower Rotation
Three-Phase Models
Caution! In three-phase models, incorrect phasing of power leads can cause
backward rotation of blower motors and CONTAMINATION OF THE
DESICCANT!
Always check blower rotation before putting material in the drying hopper!
The blower is rotating properly when air flows from the delivery outlet.
Note: Holding your hand in front of the air return will also
indicate if the blower rotates in the proper direction (by
feeling suction).
If the three-phase blower rotates improperly, reverse any two wires at the fused disconnect
outside the dryer or at the disconnect/terminal in the control enclosure. This assures that the
blower rotates in the proper direction.
Drying Hopper Air Trap Considerations (If Equipped)
Our exclusive air trap assembly on the top of the drying hopper prevents ambient air from
contaminating the material being dried. To ensure that your unit will operate at peak
efficiency, do the following:
• Keep the material level at the mid point of the air trap
This can be achieved by utilizing a hopper loader or vacuum conveying system to
supply material to the drying system.
Installing the Optional Aftercooler
Water-cooled 15/30/60 cfm models use a water-to-air heat exchanger as an aftercooler.
Cooling water is required for this design (3 gpm at 85°F or lower). Return air from the
hopper passes through the air filter to trap fines and dust before entering the heat exchanger.
Installing Water Lines
(Hose and Hose Clamp)
When installing the water lines, ensure that the aftercooler utilizes either tower, chilled or city
water as warm as 85°F (29°C). Recommended flow rate is three (3 gpm) gallons per minute
(11 liters per minute).
Dehumidifying Dryers Chapter 3: Installation 17 of 53