Specifications
Portable Drying/Conveying Systems Chapter 3: Installation 21 of 76
• 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).
NOTE: If the Aftercooler is used as a plasticizer trap, the water temperature of 50°F or lower
is recommended.
3-5 Initial Start-up
Pre-Startup Checks
; Check the process and return hoses for tight connections.
; Check all companion equipment, such as the drying hopper; verify that the loading
system is ready for operation.
; Verify that all dryer electrical connections are tight.
; Verify that the thermocouple is properly installed at the hopper inlet.
Starting Up the Dryer
1. Turn on (energize) the disconnect switch in your power drop, then turn on the disconnect
switch on the dryer.
2. Turn the system ON/OFF switch to ON to energize the display panel.
3. Check the display for the proper temperature scale (ºF or ºC).
4. Close the slide gate at the bottom of the drying hopper.
Make sure that the blowers turn in the right direction.
5. Fill the drying hopper with material.
6. Press the START button on the Touch Screen to start the dryer.
The process blower starts.
7. If your dryer has a water-cooled aftercooler, make sure that sufficient cooling water (3gpm at 85°F
or lower) flows properly through the coil and that you have bled any trapped air from the system.
8. Set the process set point on the touch screen.
9. After the proper pre-drying time for the initial hopper fill has elapsed, fully open the drying hopper
slide gate.