AEC TD Floor Mount Dryers User Manual

TD2 & TD4-25-100

FLOOR MOUNT DRYERS

OPERATING MANUAL

OPERATING MANUAL - TD2 & TD4-25-100 DRYERS
Revision 8/31/01

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801 AEC Drive
Wood Dale, IL 60191-1198

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FAX [phone]

Internet http://www.aecinternet.com

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OPERATING MANUAL - TD2 & TD4-25-100 DRYERS
Revision 8/31/01

CONTENTS

DRYER OPERATION/FEATURES ---------------------------- 4
AIR FLOW SCHEMATIC FOR TD2 DRYERS ------------ 6
AIR FLOW SCHEMATIC FOR TD4 DRYERS ------------- 7
DRYER CYCLE DIAGRAM-------------------------------------- 8
PLC STANDARD ELECTRICS --------------------------------- 9
INSTALLATION PROCEDURE -------------------------------10

Electrical Connection ----------------------------------------10
Check for correct motor rotation -------------------------10
Compressed Air Connection ------------------------------10

START-UP PROCEDURE --------------------------------------11

Standard Electrics --------------------------------------------11
To Set Temperature: -----------------------------------------11
Microprocessor Control -------------------------------------12

DRYER OPERATION-TROUBLE SHOOTING-----------13
DRYER OPERATION-DETAILED DIAGNOSIS ----------14
ROTARY ZONE VALVE -----------------------------------------15
PARTS LISTS

TD2 & TD4- 25 - 35 ------------------------------------------16
TD2 & TD4- 50 - 100 ---------------------------------------17

OPERATING MANUAL - TD2 & TD4-25-100 DRYERS
Revision 8/31/01

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DRYER OPERATION/

FEATURES

The TD2 dryer series is a dual bed design that provides a
constant supply of dry air to the material hopper. While one
bed is removing moisture from the process air the other is
regenerating by heating the desiccant to a high temperature.
Once the regenerated bed cools down, the Zone Valve
switches the airflow, and the newly regenerated bed is used to
desiccate the process air stream. The saturated bed is now
regenerated in the same manner, completing the regeneration
cycle. The cycle is depicted Page 8.

The airflow design of the TD2 dryers makes the regeneration
cycle more efficient because we utilize a small amount of the
desiccated process air rather than ambient air to regenerate
the desiccant bed. This reduces the impact of the high
moisture content of the ambient air, which would contaminate
the desiccant bed, and allows the dryer to attain a lower dew
point. Please see the Air Flow Schematic on Page 6.

TD4 Design
Our patented TD4 design incorporates 4 desiccant beds

where two are stacked, one over the other. This nearly
doubles the amount of desiccant available for drying the
process air stream, and because of the tower design, the
dryer is able to regenerate the desiccant in the same time as
our TD series. This allows the dryer to operate in very high
humidity conditions without affecting the process air dew point.
In fact, this design produces dew point levels of – 40’ to -80’ C
for faster more complete drying of your material. Please see
the Air FLow Diagram on Page 7.

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Hopper Design
Our ”all stainless” hopper design utilizes a stainless steel inner

shell surrounded by a stainless steel jacketed insulation layer.
The easily removable stainless steel spreader cone promotes
proper material flow to ensure that the material is dried
efficiently and no dried material is left at the hopper bottom
that needs to be fed out prior to operating. You must ensure
that your hopper is adequately sized for your usage rate and is
kept filled, to ensure that you have sufficient time to dry the
material.

OPERATING MANUAL - TD2 & TD4-25-100 DRYERS
Revision 8/31/01

DRYER OPERATION/

FEATURES (Cont.)

Dryer Controls
The TD2 series can be supplied with the standard PLC

Control Module or the advanced Microprocessor Control
Module, while the TD4 series is only available with the
Microprocessor Control Module.

The PLC Control module includes a PLC control board,
display board, temperature controller and touch pad that is
programmed for the drying cycle described above. The
controller, display board and touch pad indicate the machine
status, alarms, set points and allow you to enter operational
settings for the dryer. These are explained in more detail later
in this manual.

The Microprocessor Control Module is one of the most
sophisticated yet operator friendly controls on the market. It
has many more features than the PLC control module that
provide the operator with more control and operational
flexibility with the dryer. These features and the operating
instructions are covered in detail in the Microprocessor
Control Instruction Manual included with your dryer.

OPERATING MANUAL - TD2 & TD4-25-100 DRYERS
Revision 8/31/01

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AIR FLOW SCHEMATIC

FOR TD2 DRYERS

CONTROL

THERMOCOUPLE

H1

VORTEX BLOWER

4-WAY ZONE

VENT

REGENERATION

AND PROCESS

HEATER

SAFETY THERMAL

VALVE

XXXX

FILTER

CONTROL

THERMOCOUPLE

H2

CONTROL

THERMOCOUPLE

L1

Page 6

CONTROL

THERMOCOUPLE

L2

SAFETY THERMAL

TO HOPPER

PROCESS HEATER

(TC2 & TD2 50-100)

OPERATING MANUAL - TD2 & TD4-25-100 DRYERS
Revision 8/31/01