
MDB Series Dehumidifying Dryers Operation and Installation Manual 50, 100, 150, 255 CMF (85, 170, 255, 380 M3/hr)
1-3 Responsibility These machines are constructed for maximum operator safety when used under standard operating conditions and when recommended ins
NEVER try to pull material out of the dryer with your hands while it is running! Before you start the dehumidifying dryer, check the following:
When you need to perform maintenance or repair work on a dehumidifying dryer above floor level, use a solid platform or a hydraulic elevator. If ther
Chapter 2: General Information 2-1 Models Covered in This Manual This manual provides operation, installation, and maintenance instructions for 50,
This system is a closed loop, because ambient (outside) air is never introduced into the process air. See Figure 1. Our dehumidifying dryers use the
Absorbed water is driven from saturated desiccant by heating it to a high temperature (reducing the desiccant's capacity to hold water) and forci
Closed Loop and Heat Recovery Option After bed breakthrough (see Process/Regeneration Cycle) the desiccant is hot and needs to be cooled down to avoi
Safety Devices and Interlocks This section includes information on safety devices and procedures that are inherent to the large dehumidifying dryer.
In addition to the safety devices listed above, these dehumidifying dryers are equipped with a line cord plug. This allows the operator or maintenanc
Material saver with temperature setback Process recipes (200 max, over 50 pre-loaded) Drying temperature Residence time Regrind percent Densit
Write Down Your Serial Numbers Here For Future Reference: _________________________ _________________________ _________________________ _____
2-6 Dimensions and Specifications General Information 20
2-7 Silo Dehumidification System Airflow range – Mid- Size 50-225 cfm (In most cases, a 50 cfm dryer may not be adequate). Metal silos are aff
Chapter 3: Installation 3-1 Positioning Your Dryer The dehumidifying dryer system was designed to be wheeled into place. The entire assembly is mou
Process Blower Note: The return port is hosed to the process filter inlet. Regeneration Blower The air connection mark
3-4 Process Air Connections Between the Dryer and Drying Hopper Remove the cap plugs from the inlet, discharge and bleed tubes before operation.
3-6 Drying Hopper Removing the Rust Inhibitor Rust preventative has been applied to internal unfinished surfaces. Remove rust inhibitor before using
Chapter 4: Controls 4-1 Controller Descriptions The DryPro dryer control system is designed to control all ACS cabinet, medium and large dryers. T
The drying hoppers can be started in a staggered manner where the control waits an adjustable time between starting each drying hopper. ACS recommend
4-3 DryPro Data Entry Values and text are changed using on-screen keypads. The screen will display either a numeric or alphanumeric keypad, depend
System Setup. Use the “System Setup” display to • Select whether temperatures are displayed in Fahrenheit or Celsius. • Select metric or st
Shipping Info Unpacking and Inspection You should inspect the large dehumidifying dryer for possible shipping damage. Thoroughly check the equipment f
1. Set the normal process temperature setpoint. The material saver setpoints are set on the Overdry Protect Setup screen. 2. Set the deviation limit
Process Autotune Screen Use the Process Autotune screen to start or stop autotune for the process heater. Also, values can be manually entered, alth
Use this screen for entering data for new recipes. Pressing the “Save” button will write the new recipe to Compact Flash and return to the Mater
Dewpoint Setup screen Use this screen to set up switch on dewpoint parameters, as well as the high dewpoint alarm value. Overdry Protect Setup scre
Hour Meters Setup screens Use these screens to view and / or reset the various hour meters associated with the dryer. To reset a meter, press the “
4-5 Single Hopper Dryer Operation Main Menu screen The Main Menu is the main navigational screen for the DryPro control system. No passwo
Supervisor or above password is required for: 4) Setup Menu 5) Auto Start Timers Service password access is required for Service screens (ACS qua
H) Regen Heater Temperature. This appears adjacent to the bed currently in the regeration cycle. Each Regen heater also may indicate “AT” when autot
3) Regen Status screen This screen displays all current status values for the regen subsystem. As with the Dryer Status screen, touching any curren
This screen is used to control the auto start functionality of the dryer. AutoStart must be enabled for entered times to take effect. A value of 12:00
Returns Do not return any damaged or incorrect items until you receive shipping instructions from the shipping department. Credit Returns Prior to
8) Users screen This screen is used to change passwords for User1 or Super1. That user must be logged on to be able to change the password. User2 &am
These screens are used to graphically track all dryer temperatures: Process inlet (shown above) Process exit Regen heater Regen exit Dew point 4-6
- Turn dip switch 2 on (slide to right side). - Turn on Power. - Wait for “Backup” indicator to turn off. - Turn off power. - Remove memory c
Dryer & Drying Hopper Faults Faults fall into two broad categories. • Critical Faults – Shuts down equipment. • Non-Critical Faults – Does
When a fault condition occurs, the screen displays an “Alarm Banner” showing the time, date and a brief description of the alarm. Optionally, the con
Regen Air Blower Safety Fault Regen Air Dirty Filter Alert Regen Exhaust Sensor Error Alert Temperature Alarms The control checks for high low and
The other key difference is the addition of the new pushbutton on the Drying Hopper screens. For example, the green “Enable” icon
Chapter 5: Operation 5-1 Pre-Startup Checks 1. Verify that the drying hopper is clean of rust-prohibitive oil or any foreign objects. 2. Verify
5-3 Shutdown 1. Turn off the conveying system supplying the drying hopper. 2. When processing is complete, close the hopper slide gate and shut
Chapter 6: Operation 6-1 Work Rules The installation, operation, and maintenance of this equipment is to be conducted in accordance with all applic
Table of Contents CHAPTER 1: SAFETY ... VII 1-1 How to Use This Manual ...
Recommendations for Cleaning and Replacing Filters • Turn off and/or lock out electrical power to the dryer. • Remove the threaded fastener securing
Preventative Maintenance Checklist Dehumidifying Dryer Systems System model # Serial # Every week Date/ By Date
6-3 Servicing the Dew Point Monitor The accuracy of the dew point monitor on dehumidifying dryer systems depends on proper operation of the dew poin
6-5 Replacing Worn Desiccant Make sure desiccant beds are sufficiently cool before replacing worn desiccant. 1. Disconnect the electrical supply.
Before re-packing the beds, determine the proper amount of desiccant for the dryer being serviced. See Figure 7 on the fol
9. Re-install the rear and side shrouds. Re-connect the compressed air supply and electrical power. Figure 7: Required Desiccant Amounts per Bed; Typ
6. Re-install the heater and heater plate assemblies in reverse order. Install new heater gaskets and securely tighten all fasteners. Heater loops sh
Chapter 7: Troubleshooting Problem Possible cause Corrective action Little or no air coming from the process delivery tube. Dirty filter. Clean or re
Problem Possible cause Corrective action Loss or reduction in drying capacity. (Cont’d.) Airflow valve sticking or failing to shift. Check for prop
Problem Possible cause Corrective action Nothing displays when the controller is turned on. The internal mechanism is not inserted properly into the
CHAPTER 4: CONTROLS ... 26 4-1 Controller Descriptions ...
Chapter 8: Appendix 8-1 Technical Assistance Parts and Service Department The ACS Customer Service Group will provide your company with genuine OE
The following design information is provided for your reference: 1. No modifications are allowed to this equipment that could alter the CE compliance
8-3 Parts Diagrams Valve Assemblies – MDB 85 & 170 Appendix 62
Notes Appendix 63
Chapter 1: Safety 1-1 How to Use This Manual Use this manual as a guide and reference for installing, operating, and maintaining the mid-sized deh
Dryer Safety Tags Hazard Alert Symbol Description/Explanation Preventative Maintenance High Voltage Hazard. The electrical enclosure is supplied wi
1-2 Warnings and Precautions Our equipment is designed to provide safe and reliable operation when installed and operated within design specificati
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