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Operation and Installation Manual
90,100, 150, 225 CFM Cabinet
Series Dehumidifying Dryers
Important! Read Carefully Before Attempting to Install or Operate
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A0534806
Part No: 882.00282.00 Effective: 4/28/08 Bulletin No: DH1-630.1
Cabinet Series Dehumidifying Dryer Chapter 1: Safety 1
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Performance figures stated in this manual are based on a standard atmosphere of 59°F (15°C) at 29.92” Hg (1,014 millibars) at sea level, using 60 hz power. Altitude is an important consideration when specifying drying and conveying systems. The manufacturer can advise you on proper selection and sizing of systems for your operating environment. We are committed to a continuing program of product improvement. Specificat
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Table of Contents CHAPTER 1: SAFETY……………………………………………...6 1-1 How to Use This Manual. ............................................................................................6 Safety Symbols Used in this Manual.....................................................................6 1-2 Warnings and Precautions ..........................................................................................7 1-3 Responsibility .......................................................................
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4-6 Setting the Process Air Temperature ........................................................................22 4-7 PLC Controller...........................................................................................................22 PLC LED Indicators.............................................................................................23 Output LED Indicators .........................................................................................24 Status LED Indicators....
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Charts and Figures 1 Dryer Air Flow Diagram 12 2 Typical Dryer Interface Panel 18 3 Typical Dryer Temperature Controller 20 4 Display Readout for Mode Settings and Available Security Levels 22 5 Typical Subpanel Layout 25 6 Typical Cabinet Dryer Electrical Schematic, Drawings 1 and 2 26-27 7 Required Desiccant Amounts Per Bed 41 Setting List for Process Temperature Controller, 8 Part No. A0548565 43 9 Setting List for Dew Point Controller, Part No. A0548565 46 Cabinet Series
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Chapter 1: Safety 1-1 How to Use This Manual Use this manual as a guide and reference for installing, operating, and maintaining the large dehumidifying dryer. The purpose is to assist you in applying efficient, proven techniques that enhance equipment productivity. This manual covers only light corrective maintenance. No other maintenance should be undertaken without first contacting a service engineer. The General Information section outlines models covered, standard features, and saf
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Dryer Safety Tags Tag Tag Description Description Read Operation High Voltage Inside & Installation Enclosure Manual Hot! Lifting Point Protected Earth Earth Ground Ground PE 1-2 Warnings and Precautions Our equipment is designed to provide safe and reliable operation when installed and operated within design specifications, following national and local safety codes. This may include, but is not limited to OSHA, NEC, CSA, SPI, and any other local, national and internati
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We have long recognized the importance of safety and have designed and manufactured our equipment with operator safety as a prime consideration. We expect you, as a user, to abide by the foregoing recommendations in order to make operator safety a reality. 1-3 Responsibility These machines are constructed for maximum operator safety when used under standard operating conditions and when recommended instructions are followed in the maintenance and operation of the machine. All personnel e
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NEVER place your hands or any part of your body in any dangerous location. NEVER operate, service, or adjust the dryer without appropriate training and first reading and understanding this manual. 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: • Remove all tools from the dryer; • Be sure no objects (tools, nuts, bolts, clamps, bars) are laying in the area; If your dryer has been inoperat
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If you need to repair a large component, use appropriate handling equipment. Before you use handling equipment (portable “A” frames, electric boom trucks, fork trucks, overhead cranes) be sure the load does not exceed the capacity of the handling equipment or cause it to become unstable. Carefully test the condition of lifting cables, chains, ropes, slings, and hooks before using them to lift a load. Be sure that all non-current carrying parts are correctly connected to earth ground with
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Chapter 2: General Information 2-1 Models Covered This manual provides instructions for installing and operating 90, 100, 150, and 225 CFM cabinet-style dehumidifying dryers. 2-2 Equipment Function Our dehumidifying dryers are designed to generate heated, dehumidified air at carefully controlled temperatures for use in closed-loop plastic drying systems. Moisture removal from hygroscopic (moisture attracting) plastic pellets is an essential step in the manufacture of high- quality plas
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Audible/visual critical alarm. Fusing for blowers and heaters. Dirty Filter indicator for each individual blower. 2-6 The Closed Loop Drying System Dehumidifying dryers force hot, dry air through the resin in the drying hopper where the air picks up moisture from the material and is drawn back to the dryer. In the dryer, a desiccant bed strips moisture from the air. The dryer then re-heats dried process air, and sends it back into the drying hopper to dry material again. This syst
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2-7 What is Desiccant? Desiccant is a material which attracts and holds (absorbs) water from the air. Our dehumidifying dryers use a synthetic crystalline metal aluminosilicate desiccant blended with a clay binder and formed beads. Absorbed water is driven from saturated desiccant by heating it to a high temperature (reducing desiccant capacity to hold water) and forcing air through it. This moisture removal process is called regeneration. 2-8 The Process/Regeneration Cycle Our dehumidif
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Chapter 3: Installation 3-1 Positioning Your Dryer The dehumidifying dryer system was designed to be wheeled into place. The entire assembly is mounted on a rugged, compact frame and is equipped with sturdy, 4” (10 cm) heavy-duty casters, two locking and two swivel. Caution! Use caution and observe safety rules when placing your dryer! 3-2 Making Electrical Connections Fulfill all national, state, and local safety and electrical code requirements. Connections should be made by a qual
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3-5 Process Air Connections Between the Dryer and Drying Hopper Remove the cap plugs from the inlet, discharge and bleed tubes before operation. Use high-temperature flexible dryer hose to connect the dryer to the drying hopper. Keep the delivery hose as short as possible to minimize heat loss. Insulated dryer hose is available for maximum energy savings. Do not shorten the return hose. Make sure the hoses are not kinked. Drying hopper air inlet and outlet locations vary from one d
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Chapter 4: Controls 4-1 Control Panel Indicator Lights and Switches Rocker Switches System ON/OFF Rocker Switch Used to de-energize control power to the indicator panel, allowing separate control of the dryer and conveying systems. Dryer ON/Sequence Shutdown Rocker Switch Used to start the dryer. Move this switch to the Sequence Shutdown position to turn off the process heaters, finish the regeneration cycle and then turn off the dryer. Optional Alarm Silence Rocker Switch Press the
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Indicator Name Description compressed air, the pressure switch opens and sends a signal to the PLC controller to shut down dryer operation. Dryer operation automatically resumes when 80 psi (551 kPa/ 5.51 bars) air is restored. High Temp The High Temp Process Air alarm indicator lights Process Air Light when the temperature at the process air thermocouple is above the high alarm set value. Upon high temperature alarm condition the process heaters turn off, the process blower remain on.
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Figure 2-Typical Dyer Interface Panel Cabinet Series Dehumidifying Dryer 18
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4-2 Process Air Dew Point Display The Dew Point display indicates the current process air delivery moisture content. The display uses a microprocessor-based controller for reading dew point air temperature. The controller is a modular, self-contained removable unit in the mounting housing. All parameters are factory-set and adjusted; no field adjustment to the internal controls is necessary. The high dew point alarm is also factory adjusted. 4-3 Process Air Temperature Controller Our dehu
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4-5 Identifying Temperature Controller Buttons Display Button This button shifts the display to the next set of parameters. Then, the menu screen displays. Down Arrow Button The Down Arrow button lets you lower the process air set point temperature. During setup, it lets you decrease the value of the parameter displayed on the set point LED readout. Up Arrow Button The Up Arrow button lets you raise the process air set point temperature. During setup, it lets you increase the value
