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Sterling Clothes Dryer 882.00290.00 User's Manual

1. 29 Alarm Display MesSagBs eoe oet uidi eet tet sepe Loseunactayivaugaeenemespaniesguceenebeens 31 44 Avto Tuning the Drye ereere rh padece Pese epe Ged Quei bae des egeta veg Rete uds 32 4 5 Shutting Down the Dryer e Pct t Une ee Doa ORARE eoe pa eom E DR ES ciate 32 CHAPTER 5 MAINTENANCE eere nnn 35 5 1 Preventative Maintenance Schedule sess 35 5 2 Preventative Maintenance ws o pases dia suscepi rere dae Re irt vas vidis odore Gi ru ERR MPa 35 Servicing Process Air TNOKS ust eie opp erento re Epid nes 35 Servicing the Dew Point Monitor esses sessi eene nnn 37 5439 Corrective Maintenance o cicer te doe sundeck apa oorr bo ventole ue Sete fata o 37 Symptoms of Wort Desi all eia ee bcne egeti oon vices tea Doe noida aod dobestes 38 Replacing Worn DesIGCAb seo eode teo ter oq ette te ves ease eae 37 Replacing the Regeneration Heaters eese 39 Replacing the Process Heaters esses enn 40 Replacing Cleaning the Cooling Coil esses 40 CHAPTER 6 TROUBLESHOOTING 42 a AEEA 101206 Eoi 101a ettet LC RCM 42 6 2 Determining Temperature Controller Errors or Sensor Errors ssse 44 Using a Thermocouple cesses Error Bookmark not defined Using a Platinum Resistance Thermometer Error B
2. Hot spots lead to premature heater failure 2 Reinstall the wires based on the sketch you made earlier 3 Reinstall the ceramic nuts to each heater terminal Dehumidifying Dryers Chapter 5 Maintenance 40 of 53 Replacing Cleaning the Cooling Coils WARNING Hazardous electrical current present Disconnect and lock out power before you replace heater elements Figure 14 Cooling Coil Location and Disassembly 1 Wide x 1 8 Thick High Temperature Gasket Use compressed air or a steam cleaner to blow the dust off or clean Undo 4 10 32 Button il h il Head Screws using 1 8 any oily residue on the coil Allen Wrench Water flow requirement If used as an After Cooler 3 to 4 GPM 80F If used as a Plasticizer Trap 3 to 4 GPM 40F to 45F Note To clean the cooling coil use compressed air or a steam cleaner to blow the dust off or clean any oily residue on the coil Replacement Procedures 1 Shut down the dryer tag out and lock out the controls if necessary Shut the water off to the cooling coil Remove the four 10 32 bolts Gently slide the cooling coil out Visually inspect the coil for leaks dirt and ant sign of volatiles Blow the dust out or if the coil is covered with plasticizer steam clean it Place the coil back in its housing Make sure the gasket is OK replace if necessary Inset the four 10 32 bolts back in place Co oo 1 ON nN A WO N Turn the water to the cooli
3. 15 30 and 60 CFM Dryers With AP O Controls Part Number 882 00290 00 Bulletin Number DH1 640 2 Effective 05 15 06 Write Down Your Serial Numbers Here For Future Reference We are committed to a continuing program of product improvement Specifications appearance and dimensions described in this manual are subject to change without notice DCN No Copyright 2006 All rights reserved Shipping Information Unpacking and Inspection You should inspect your dryer for possible shipping damage Thoroughly check the equipment for any damage that might have occurred in transit such as broken or loose wiring and components loose hardware and mounting screws etc In the Event of Shipping Damage According to the contract terms and conditions of the Carrier the responsibility of the Shipper ends at the time and place of shipment Notify the transportation company s local agent if you discover damage Hold the damaged goods and packing material for the examining agent s inspection Do not return any goods before the transportation company s inspection and authorization File a claim with the transportation company Substantiate the claim by referring to the agent s report A certified copy of our invoice is available upon request The original Bill of Lading is attached to our original invoice If the shipment was prepaid write us for a receipted transportation bill Advise customer service rega
4. Dehumidifying Dryers Chapter 4 Operation 32 of 53 4 Turn the system ON OFF switch to OFF 5 If needed empty the drying hopper 6 For maintenance or a long term shutdown open de energize the electrical disconnects at the dryer and at the power drop Dehumidifying Dryers Chapter 4 Operation 33 of 53 Chapter 5 Maintenance 5 1 Preventative Maintenance Schedule The checklist below contains a list of items which should be inspected and or replaced to keep your Portable Drying Conveying System operating at peak efficiency Perform each inspection at the regular intervals listed below System model Date Date Date Date Date Date Date Date Date Date Date Date Date Every Day Inspect all filters for wear replace clean if dirty or worn Check to make sure that all hose connections are air tight Lock out electrical power and inspect electrical wiring for integrity Lock out electrical power and check heater elements for continuity using an ohmmeter Check dew point and temperature tracking with an external dew point monitor and pyrometer Visually inspect the shifting of the airflow valve during one cycle Next scheduled Actual inspection Next scheduled Actual inspection Inspect desiccant Replace if brown or broken Scheduled Actual replacement Scheduled Actual replacement Every two years replacement date Date Work done by replacement date Date Work done by
5. Photocopy this page for your maintenance records Dehumidifying Dryers Chapter 5 Maintenance 34 of 53 5 2 Preventative Maintenance This section describes maintenance procedures which will increase the longevity and efficiency of your dehumidifying dryer Perform them at the regular intervals listed on the dryer checklist on the previous page Servicing Process Air Filters Caution Operating the dryer without the process air filter installed voids your warranty Filter cleaning is an important part of your dryer maintenance program Dehumidifying dryers have a single cartridge canister type filter in the process air loop The filter protects blowers from plastic fines drawn in from the drying hopper and prevents the desiccant from being contaminated Regular filter cleaning is essential to keep your dryer operating at peak efficiency You can blow or vacuum the dirt out of the filter with compressed air but remember it could become damaged from high pressure blowing Recommendations for Cleaning and Replacing Filters e Turn off and or lock out electrical power to the dryer e Remove the threaded fastener securing the filter access cover then remove the cover e Remove the nut on the center retaining rod to remove the filter cartridge Figure 10 Air Filter Location and Disassembly Thumb Nut uA Clamp RSI oC COMA T a oe RRA eo Filter Filter Housing Cartridge Dust Can Dehumidifying Dryers
6. Screen Cover for the DesiccantTanks 0566688 _ 1 4 ODTeflonTube lt A0566415 Washer Gasket for the Heater Elements DRYER SPARE PARTS LIST AD15 AD30 AD60 e 2 l2 2 2 2 2 2 2 2 2 t a i t E E E E E Q o Q o o o o o o o o o o o o 6 o o oll S S S S S SI SI S S S amp S ee ee ee a j el oj oj ej oj cj oj GO 15CFM 60CFM LEVEL 3 Electrical Components oO i 4 d E n X x b ud ds T T 5 T 5 I 5 I 5 T 5 T 5 I 5 I 5 I S js I js ES i S Z Sl ZIS S 2 gt gt gt gt gt gt S gt gt E gt PART SIZE Description 2 8 1818 8 eS 8 8 8 S SI RISISISIS Aos67921 PowerDiconned A05660906 Mitsubishi Programmable Relay Logic Controller A0568961 Redundant Temperature Safety Controller LEVEL 3 Mechanical Components PART Ao534059 2 O D by 12 FtLong Hi Temp Hoss A0534060 2 1 2 O D by 12 Ft Long Hi Temp Hose A0566535 Return Air Cooling Coil A0536628 208 460 Volt Process Blower Ld A0536629 575 Volt ProcessBlower Cd A0534079 A0535351 2087460 Volt Process Blower 575 Volt Process Bower Ao552439 208 460 Volt Process Blower 0552440 575 Volt Process Bower jwoootss3s De
7. constructed heater operate safely drvina hopper housing and with minimum air ying opp desiccant flow container High temperature Process Air Regeneration snap Switches Temperature thermocouple Ae monitor the heat Thermocouple monitors and 2 Hose N status of the Position controls the heater housings regeneration temperature 2 1 2 Hose Dehumidifying Dryers Appendix 47 of 53 Figure 16 High Heat Model 180 F to 400 F Air Flow Schematic Pressure switch makes sure the blower is functioning correctly High pressure peripheral regenerative blower Dryer valve Optional Return Air Cooler 2 Hose Utilizing 40F dew point air to regenerate 2 Process and cool the Hose Regeneration Return Air desiccant Air Filter Temperature Thermocouple Position 13X Molecular ed s TNE Heu Low watt density eads heaters can i z Se z pu operate safely 2 1 2 Hose Double wall bos with minimum air Insulated constructed heater flow stainless steel housing and drying hopper desiccant container High temperature Process Air Regeneration snap switches Temperature thermocouple M monitor the heat Thermocouple 2 Hose EM status of the Position monitors and contro
8. 53 Dehumidifying Dryers 4 Chapter 1 Safety 1 1 How to Use This Manual Use this manual as a guide and reference for installing operating and maintaining your drying system 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 Functional Description section outlines models covered standard features and safety features Additional sections within the manual provide instructions for installation pre operational procedures operation preventive maintenance and corrective maintenance The Installation chapter includes required data for receiving unpacking inspecting and setup of the drying system We can also provide the assistance of a factory trained technician to help train your operator s for a nominal charge This section includes instructions checks and adjustments that should be followed before commencing with operation of the drying system These instructions are intended to supplement standard shop procedures performed at shift daily and weekly intervals The Operation chapter includes a description of electrical and mechanical controls in addition to information for operating the dryer safely and efficiently The Maintenance chapter is intended to serve as a source of detailed assembly and disassembly instructions for
9. High Set Alarm 2 Low Set Alarm 2 High Set Limit 3 Low Set Limit 3 High Set Alarm 3 Low Set Alarm 3 High Set 0 no lockout 1 Programming and Setup Page Locked 2 Limit Set Points are the only Operation Page parameters accesible 3 Full Lockout Limit 1 High Set Dehumidifying Dryers Chapter 4 Operation 27 of 53 4 3 System Operation Procedures Controller Operation Without Optional Alarm Horn amp Reset Button 1 Turn the disconnect on the control panel to the ON position Power is applied to the voltage line fuses line side of the control power switch and the temperature controller 2 Turn the control power switch to the ON position Power is applied to the programmable relay and dew point controller The valve will move to the start position as follows a The valve motor rotates until the cam switch makes 2 transitions b If the cam switch does not make a transition within 10 seconds a valve motor fault is generated VALVE MTR is displayed on the relay screen the alarm light is activated The valve motor heaters and blower shut off To restart the dryer cycle control power to deactivate the alarm light and restart the valve motor sequence Note The relay screen which contains the Alarm Display Messages is located inside the controller enclosure For a list of Alarm Display Messages see Page 33 Turning off the dryer resets the alarm WARNING Do not attempt to check t
10. IMMEDIATELY IF IRRITATION PERSISTS Replacing Worn Desiccant Caution DESICCANT BEDS ARE HOT DURING OPERATION To avoid burn hazard make sure desiccant beds are sufficiently cool before replacing worn desiccant To access the Desiccant Bed 1 Disconnect electrical power to the dryer N Using a 1 8 Allen wrench remove the four 4 10 32 button head screws holding the Desiccant Cap to the Regeneration Heater 3 Remove the Desiccant Cap With a shop vacuum carefully remove all desiccant from each tower Dehumidifying Dryers Chapter 5 Maintenance 37 of 53 Figure 11 Desiccant Bed Location and Disassembly Desiccant Cap 13X Molecular Sieve E 8x12 Beads ie Regeneration Heater E Undo 4 10 32 Button Head Screws using 1 8 Allen Wrench 1 Wide x 1 8 Thick Silicon Strip and Stick Gasket Regeneration Thermocouple 16 Mesh 0 028 Diameter Wire V 040 SaL ee Stainless Steel Screen Hi Temperature O Q Snap Switch m 1 Wide x 1 8 Thick High Temperature Gasket Caution You should properly dispose of any discarded desiccant Consult local disposal regulations for more information Inspect each lower desiccant screen for tears or holes where desiccant burned through Replace as needed 1 After cleaning each chamber add the full amount of b
11. Mode d Setting the derivative control provides the controller with the ability to correct for a future error in the previously set process output Dehumidifying Dryers Chapter 4 Operation 23 of 53 Entering Operating Parameters to Select Modes To enter the display 1 Press the Co Mode Display key to view the Run Stop amp Alarm 1 Modes AM Ss 2 Press land LOZ to set the higher or lower the values of the parameter or turn that function On or Off The SV readout displays the different values for the parameter within a mode 3 To switch modes within a level press and hold the Level Display key for one 1 second The PV readout will display the different parameters within each mode 4 Use short presses on the Co Mode Display key to display each parameter within a mode The SV readout displays the different values for the parameter within a mode AM ANDES 5 Press land O lt lto set the higher or lower the values of a parameter or turn that function On or Off C 6 Press Level Key once to return to the Process Temperature Setting Figure 6 Settings for Process Temperature Controller E5CN Part No A0567917 Mode Parameter Settingrange Default Manuf setting Run Stop Run Stop Run Alarm value 1 1999 to 9999 35 Mode Parameter Settingrange Default Manuf set
12. N T e e 2 io to 15CFM 60CFM DRYER SPARE PARTS LIST AD15 AD30 AD60 1 3 m x 208V 3PH 400V 50 HZ 3PH 220V 50 HZ 3P 230V 3PH 460V 3P 575V 60 HZ 3P 208V 3PH 220V 50 HZ 3P 230V 3P 400V 50 HZ 3P 460V 3PH LEVEL 2 Electrical Components PART SIZE Description A0558000 Motor Starter O A0530042 Mercury Heater Contactor A0567917 Process Air Temperature Controller A0544089 Regeneration Air Temperature Controller A0558065 7 DewPontMonto A0505417 Regeneration T Couple Relay LEVEL 2 Mechanical Components PART A0548621 Ceramic Cap forthe End of Heater Elements A0566478 7 50 Watts Heater element 208 220 Volts A0566479 750 Watts Heater element 230 Volts A0566480 750 Watts Heater element 400 Volts A0566481 750 Watts Heater element 460 Volts A0566482 750 Watts Heater element 575 Volts A0566483 1250 Watts Heater Element 208 220 Volts A0566484 1250 Watts Heater Element 230 Vots A0566485 A0566486 1250 Watts Heater Element 460 Volts A0566487 1250 Watts Heater Element 575 Volts A0566601 A0566602 2500 Watts Heater Element 230 Vots A0566603 A0566604 2500 Watts Heater Element 460 Volts A0566605 2500 Watts Heater Element 575 Vots A0568139 Screen Cover for the Desiccant Tanks A0568140 Screen Cover for the Desiccant Tanks A0568141
13. S S S 9 8 I I 60CFM 60CFM 3 575v 60 Hz SPH osv srh 220v so Hz ap pao aed oov so Hz seni sov spo 576v 60 Hz SPH 208V 3PH 220V 50 HZ 3PH esov sp eocrm LEVEL 1 Electrical Components 3 3 LJ E a a ft fs _ 3 i3iS 3 3 A0534044 8 _ Fuse for the Heater Elements i Fuse for the Heater Elements A0534049 20 Fuse for the Heater Elements Fuse for the Process Blower A0550593 5 6 Fuse for the Process Blower j 0538062 6 FusefortheProcessBlowr LEVEL 1 Mechanical Components W00015435 Dew Point Sensor Insert Cable A0548556 Dew Point Sensor A0566467 Valve switch _ W0005247 Process Air Filter W00018051 t3X molecular Sieve Desiccant 8 X 12 Beads W00013983 High Temperature Gasket j 0566676 High Temperature Snap Switch C En 3 L1 _ L _ LL 8 _ L __ 3 L 1 L1 se L LL Ls T D 01 p t1 4 75 Lbs 12 25 Lbs 27 5 Lbs 135 Inches 163 Inches 188 Inches Dehumidifying Dryers Appendix 50 of 53 Figure 19 Level 2 amp 3 Spare Parts List Electrical amp Mechanical AGE BEER BERBRRG x x x pa I IL e L x
14. input signal to the programmable relay when actuated by the cam lobe Each heater is ON OFF controlled by the OMRON E5C2 controller 8 Upon completion of the HEAT portion of the regeneration sequence the regen heaters are disabled by the programmable relay and the COOL time begins 9 Once the COOL time has expired the valve motor is turned on until the cam switch makes a transition Upon making a transition the timing sequence is restarted for the new bed 10 When no fault conditions exist the display reads SYSTEM NORMAL 11 When a dew point fault is generated by the optional dew point controller the alarm horn and light will activate The alarm light will flash indicating a non critical fault Press Alarm Reset to deactivate the alarm until the next dew point fault occurs 12 The top 2 lines of the display show the HEAT and COOL times in minutes for the regeneration sequence Changes to these times can be made by the operator as follows a Press the up or down arrow until the cursor is positioned at the number to be changed b Press the key to increment the number or the key to decrement the number c Press the OK key to accept the value and write to the relay memory OR d Press the ESC key to cancel the changes Note A change will NOT take effect until step 12 c is done 13 The dryer is shut off by turning the control power switch to the OFF position 14 Refer to Schematic drawing A056
15. on back of Dryer Company Logo C XXX Series Dryer Model Number XXX 15 Max Drying Capacity HR 460V Serial Number 060701R 16 Date of Manufacture 06 2003 4 5A Over current Protection Device s 4 5A Total Frequency 50 60Hz Compressed air supply None Dryer Mass 400 Ibs 180 KG Electrical Diagrams amp Pneumatic Diagram Street Address City State Zip Code Telephone Number Dehumidifying Dryers 7 Appendix 52 of 53 7 7 Technical Assistance Parts Department Call toll free 7am 5pm CST 800 423 3183 or call 630 595 1060 Fax 630 475 7005 The ACS Customer Service Group will provide your company with genuine OEM quality parts manufactured to engineering design specifications which will maximize your equipment s performance and efficiency To assist in expediting your phone or fax order please have the model and serial number of your unit when you contact us A customer replacement parts list is included in this manual for your convenience ACS welcomes inquiries on all your parts needs and is dedicated to providing excellent customer service Service Department Call toll free 8am 5pm CST 800 233 4819 or call 630 595 1060 Emergencies after 5pm CST call 847 439 5655 We have a qualified service department ready to help Service contracts are available for most products Sales Department Call 630 595 1060 Monday Friday 8am 5pm CST Our products are sold by a world wide network of independen
16. pressure switch Check the over load rating against the wiring diagram Adjust accordingly Check the wiring of the blower Make sure it is wired for the proper voltage Check the process blower fuses for any fault Replace if necessary Check the blower motor starter Replace if necessary Check the blower motor Replace if necessary Check the incoming voltage against the name plate of the dryer 6Troubleshooting HIGH TEMP The process The process heater Dryer Shuts down temperature has contactor has failed in the Process blower OFF exceeded the alarm closed position Check Process heaters OFF set point heater contactor replace if Regen heaters OFF The high temperature necessary Alarm light is ON snap switch of the Check the Process Heater Alarm horn is ON process heater box box high temperature snap has tripped switch replace if necessary The Regeneration heater The high temperature Contactor has failed in the snap switch on ofthe Closed position Check regeneration heater heater contactor replace if boxes has tripped De ueesatys Check the high temperature snap switches on the regeneration heater mounting plates replace if necessary PROC BLWR The process blower Make sure the process air 43 of 53 Alarm Message Cause Corrective Action Dryer Status VALVE MTR The limit switch on the Limit switch may be out of Dryer Sh
17. switch makes 2 transitions b If the cam switch does not make a transition within 10 seconds a valve motor fault is generated VALVE MTR is displayed on the relay screen the alarm horn and light are activated The valve motor heaters and blower shut off Pressing the ALARM RESET pushbutton will deactivate the alarm horn and light Cycle control power to restart the dryer Note The relay screen which contains the Alarm Display Messages is located inside the controller enclosure For a list of Alarm Display Messages see Page 35 WARNING Do not attempt to check the Alarms on the Controller located within the unit enclosure unless you are a qualified electrician c The valve will normally complete one full cycle revolution If the drying process shuts down due to an alarm the dryer has been setup to have the following operational features e The bed in process at power down will remain in process e The bed in regeneration at power down will remain in regeneration The regeneration timing cycle will restart from the beginning 3 Once the control power is on and no fault conditions exist turning the Off On Start switch to the START position will start the dryer as follows a The process heater is turned on and controlled by the ESCN controller b The process regen blower is started c The regen heater is turned on and the regeneration timing sequence is initiated The regen heater is controlled by the E5C2 controll
18. 6087 enclosed in the control enclosure Alarm Display Messages Note The relay screen which contains the Alarm Display Messages is located inside the controller enclosure WARNING Do not attempt to check the Alarms on the Controller located within the unit enclosure unless you are a qualified electrician The following is a list of Alarm Display Messages which can be found on the relay screen Turning OFF the dryer clears the Fault Alarm Dehumidifying Dryers Chapter 4 Operation 31 of 53 Temperature Controller Alarm and or Regen Heater Temp Switch and or HIGH TEMP Process Heater Temp Switch and or Redundant Temp Safety Blower Overload PROC BLWR VALVE MTR Valve Motor Time Out HEAT 35 COOL 30 No Alarms SYSTEM NORMAL 4 4 Auto Tuning the Dryer 1 For Auto tuning press the level key once The AT screen will show with the setting OFF 2 Press the UP arrow to change the setting to ON 3 Press the level key again to go back to the Temperature Screen Your actual temperature will start to flash for about 10 20 minutes with the temperature fluctuating up and down during that period After the flashing stops it means auto tuning has finished 4 5 Shutting Down the Dryer 1 Turn off the conveying system supplying the drying hopper 2 When processing is complete close the hopper slide gate and shut down any in line companion equipment such as the aftercooler 3 Turn the Dryer ON OFF selector switch to OFF
19. Chapter 5 Maintenance 35 of 53 Vacuuming Try vacuum cleaning a soiled filter first Vacuuming removes most large particles and surface contaminants and may suffice for the first time you clean a filter Use a commercial duty recommended or household vacuum cleaner Vacuum the filter from the air intake dirty side only Cleaning with Compressed Air Blow clean dry compressed air up and down the pleats blowing out the filter from the inside out Remove loose dirt from the filter with compressed air or vacuum from the outside Caution DO NOT clean wash filter with water After each cleaning e Inspect the filter element Briefly hold a light bulb behind the element and look for any fatigued paper or residual dirt Inspect for holes and tears by looking though the filter toward a bright light Check for damaged gaskets or dented metal parts Do not re use a damaged filter e Check the gasket for damage A damaged gasket allows contaminants into the process Replace as needed Servicing the Dew Point Monitor The accuracy of the dew point monitor on mini dryer systems depends on proper operation of the dew point sensor and the control board The dew point sensor is in the process air stream and is therefore susceptible to contamination Dew point sensor life depends on e Air temperature and flow passing over the sensor e The amount of fines dust in the process air e The amount of plasticizer vapor in the process ai
20. Single regenerative process blower e Drying temperature range of 180 F to 250 F 82 C to 121 C e 2 5 hose connections Electrical Features e Process thermocouple to be connected to drying hopper air inlet e Nema 12 control enclosure e NFPA79 machinery electrical standards Non fused electrical disconnect Branch fusing Mercury process heater contactor Regeneration temperature control Process high temperature alarm light Process regeneration heater box High temperature safety system Process Regeneration Controller Features e Mitsubishi programmable relay controller e Display of process temperature set point and actual settings Dehumidifying Dryers Chapter 2 Functional Description 11 of 53 2 4 Options Options marked with indicate options that can be factory installed or retrofitted in the field e Process temperature up to 400 F 204 C or below 180 F 82 C including aftercooler with dryer and silicone insulated delivery hose Note For below 180 F 82 C cooler needs to cool the air coming out of the desiccant tank prior to entering the process heater box e If the dryer is a central dry air generator it will not have a process heater box e Plasticizer trap with cooling coil in lieu of standard aftercooler mounts outside on back of dryer e Drawer magnet stainless steel construction for drying hopper e Casters two 2 fixed and two 2 swivels e Machine mo
21. THE USE OF THIS PRODUCT Some states do not allow the exclusion or limitation of special consequential or incidental damages so the above limitation may not apply to you The Company s obligation for parts not furnished as components of its manufactured equipment is limited to the warranty of the manufacturers of said parts The company neither assumes nor authorizes any other persons to assume for it any liability in connection with the sale of its equipment not expressed in this warranty No person agent manufacturer distributor dealer installer or company is authorized to change modify or extend the terms of this warranty in any manner whatsoever The time within which an action must be commenced to enforce any obligation of the Company s arising under this warranty or under any statute or law of the United States or any state thereof is hereby limited to the duration of this warranty Some states do not permit this limitation so the above may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state For transactions involving the potential applicability of international law or that of a foreign country this warranty policy and the procedures hereunder shall be governed by Dehumidifying Dryers 7Appendix 45 of 53 r SIL ONS ON E COS CES CES applicable federal and state law but not by the United Nations Convention on Contracts for the Sale of Goods Custome
22. andle Within this lockable handle there may be a location for a padlock Personnel servicing the equipment should place a padlock in the lockout handle In addition to the safety devices listed above these dryers are equipped with a line cord plug This allows the operator or maintenance personnel to unplug the dryer from its power source and tag it out The plug can then be tagged with any number of approved electrical lockout tags available at most electrical supply stores WARNING Always disconnect and lockout all electrical power and pneumatic i e compressed air sources prior to servicing or cleaning the dryer Failure to do so may result in serious injury No one but the person who installed the lockout may remove it Dehumidifying Dryers Chapter 2 Functional Description 13 of 53 Chapter 3 Installation 3 1 Uncrating the Equipment Dehumidifying Dryers are shipped mounted on a skid enclosed in a plastic wrapper and contained in a cardboard box 1 Pry the crating away from the skid Note Remove the nails holding the box to the skid and lift the box off carefully avoiding staples in the 1 x wood supports Cut the steel banding 2 Use a pry bar to remove the blocks securing the unit to the skid 3 Lift unit from sides Use a pry bar if necessary to carefully remove the skid from the unit 4 Lower slowly 3 2 Rigging and Placing the Dryer Take care when rigging and placing the dryer Figures 1 2 and 3 on
23. ation sss nnne 18 Drying Hopper Air Trap Considerations essen 18 Optional AflOrcooler t ere ex Reo HEP EE AERE CHR De ERE E SEEE E 18 co tial StartUp et mr 18 Pr e Startup COCKS coo Mettius te e er dra eR Rt ipe Rentas 19 CHAPTER 4 OPERATION cato tin nn nau ouea n Yn xin caia 19 MEE ETa e E 19 4 2 Controller Description and Operation 19 Identifying Control Panel Indicator Lights and Switches for the Standard OI qoM E c 19 Process Air Temperature GonIrOllBh us Laetare eee oe i bote ei bede 20 Setting the Process Air Temperature essi esee 22 Restoring the Process Air Temperature Controller E5CN to Factory Settings 22 Process Air Dew Point DISDIAV oio e E DEP SO QURE M tege eec 25 Setting the High Dew Point Alarm esses siete nnne nnn 25 Dehumidifying Dryers 3 Restoring the Process Air Dew Point Meter E5CK to Factory Setup 25 Redundant Safety Controller Display sss 26 Setting the Redundant Safety Controller cesses 26 Restoring the WATLOW Redundant Safety Controller to Factory Setup 26 4 3 System Operation Procedures eere reser ar eee eR MR Ep Faune n 29 Controller Operation Without Optional Alarm Horn amp Reset Button 28 Controller Operation With Optional Alarm Horn amp Reset Button
24. can be energized without the dryer running Optional Alarm Silence Switch Press this switch to silence the horn when a high temperature process regeneration or blower failure alarm activates Indicator Lights Alarm Light This feature works in conjunction with the alarm horn to warn the operator of a high bed safety temperature a regeneration heater fault or a blower failure This warning is reset by pressing the alarm silence button Figure 4 Typical Dryer Control Panel shown with the optional dew point monitor Dehumidifying Dryers Chapter 4 Operation 19 of 53 PROCESS TEMPERATURE Process Air Temperature Controller Our dryers use a microprocessor based PID temperature controller for maintaining process air temperature The controller is a modular self contained unit you can remove from the mounting housing All parameters except for the process air set point are factory set and adjusted normally no field adjustment to the internal controls is necessary Figure 5 Typical Process Air Temperature Controller Temperature unit PV SV Identi S Indicator I Dehumidifying Dryers Chapter 4 Operation 20 of 53 Indicator Name Description PV 8 8 8 8 Process Value Numeric LED During normal operation the process value PV numeric LED indicator displays the process temperature at the To Process thermocouple It also lists parameters during setup and error messages if any err
25. contaminating the material being dried To ensure that your unit will operate at peak efficiency do the following e 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 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 MI Check the process and return hoses for tight connections MI Check all companion equipment such as the drying hopper verify that the loading system is ready for operation MI Verify that all dryer electrical connections are tight M Verify that the thermocouple is properly installed at the hopper inlet M Verify temperature unit scale F or C Dehumidifying Dryers Chapt
26. de the enclosure for maintenance 20 21 22 23 Doors can be opened with a screwdriver but no keys are required Two hand control is not required or provided All dryers should be moved around and set in a place with a lift truck or equivalent There are no frequent repetitive cycles that require manual control Trepetitive functions are automatic while the dryer is operating Dehumidifying Dryers 7 Appendix 46 of 53 24 The machine is not equipped with cable less controls 25 Color coded harmonized power cord is sufficient for proper installation Aftercooler Design Specifications Entering water temp USE o 96 85 F 29 C 50 F If used as Plasticizer trap 10 C If used as Plasticizer trap 7 3 Drawings and Diagrams Figure 15 Standard Model 180 F to 250 F Air Flow Schematic Pressure switch makes sure the blower is functioning correctly High pressure peripheral regenerative blower Dryer valve Utilizing 40F dew point air to regenerate Process and cool the Regeneration a Return Air desiccant Air Filter Temperature Thermocouple Position Siem d m TUIS Make Up d Soot i beads Qum YN Air i A T i 2 1 2 Hose i o Low watt density 2 Ho Insulated Double wall SEER ESOS heaters can x stainless steel
27. e Action Dryer Status HIGH TEMP Dehumidifying Dryers The process temperature has exceeded the alarm set point Make sure the process filter is clean Clean or replace if necessary The high temperature snap switch of the process heater box has tripped Double check the alarm set point Check the positioning of the thermocouple inside the air inlet of the drying hopper The high temperature snap switch on of the regeneration heater boxes has tripped The tip of the thermocouple should be centered to the tube and not touching any metal part of the tube The drying temperature set point is lower than dryer capabilities Check the dryer specs Make sure all the hose connections are tight Make sure the regeneration timing cycle matches the specs If not contact Service department 6Troubleshooting Dryer Shuts down Process blower OFF Process heaters OFF Regen heaters OFF Alarm light is ON Alarm horn is ON 42 of 53 Alarm Message Cause Corrective Action Dryer Status Dehumidifying Dryers pressure switch did not detect enough pressure filter is clean Clean or replace if necessary Process blower overload has tripped Process blower motor has failed Check the rotation of the blower Lose contacts or wires Check the pressure switch hose connection Replace hoses or the
28. e wires based on the sketch you made earlier Reinstall the ceramic nuts to each heater terminal Replacing the Process Heater The dehumidifying dryers utilize a single phase Calrod type heater element This heater element is mounted in the center compartment below the desiccant beds Although the replacement procedure is the same for each heater the wattage varies by model voltage temperature range etc WARNING Hazardous electrical current present Disconnect and lock out power before you replace heater elements Dehumidifying Dryers Chapter 5 Maintenance 39 of 53 Figure 13 Process Heater Location and Disassembly Undo 6 10 32 Butto Head Screws using 1 8 Allen Wrench 1 Wide x 1 8 Thick High Temperature Gasket d 4 4 40 screws Hi Temperature Snap Switch Procedures 1 Sketch the heater wiring configuration so you can properly re wire the heater 2 Remove the ceramic nuts and wires to the heater plate assembly being removed or replaced 6 Remove the six 6 10 32 button head screws securing the process heater plate using a 1 8 Allen wrench and slide out the assembly 7 Remove the heater s from the mounting plate by removing the large brass nuts and washers 8 Re install the heater s and heater plate assemblies in reverse order Install new heater gaskets and securely tighten all fasteners Caution Heater loops should not touch each other
29. ead desiccant specified per bed Amounts are listed in the Desiccant Amounts Table below Smooth the top level and finally add another layer of the remaining bead desiccant to the top Make sure this layer is level and smooth Tap the chambers with a rubber mallet gently for one or two minutes to make sure the desiccant is packed tight Add more desiccant if required 2 Repeat the previous step for the other bed 3 Inspect the gaskets and replace if necessary Place the screen in between the desiccant tank and the cap 4 Reconnect all the hoses and panels when done Dehumidifying Dryers Chapter 5 Maintenance 38 of 53 Figure 12 Required Desiccant Amounts Dryer 8 x 12 bead Total model ibs Kg W00018051 1575 Replacing the regeneration heaters Procedures see figure 11 1 Sketch the heater wiring configuration so you can properly re wire the heater 2 Remove the ceramic nuts and wires to the heater plate assembly being removed or replaced 3 Remove the six 6 10 32 button head screws securing the process heater plate using a 1 8 Allen wrench and slide out the assembly 4 Remove the heater s from the mounting plate by removing the large brass nuts and washers Re install the heater s and heater plate assemblies in reverse order Install new heater gaskets and securely tighten all fasteners Caution Heater loops should not touch each other Hot spots lead to premature heater failure 6 Reinstall th
30. ec pue epu us 7 Operator Fiesponsibilily EIN AREE e REN ORN Ua e QUU RENS HERE cape odes 8 Maintenance HesponsiDIly iue eset desea Re editt ccuee codes cteee 9 Reporting a Safety Defect petet iin Er eS uis Eid diu aon atc et 9 CHAPTER 2 FUNCTIONAL DESCRIPTION 10 2 1 Models Covered in This Manual eeessssseeeeeeeeeeeeee nennen nnn 10 2 2 General SSC MOU OM cee eco ertet p o e irruere Et meade 10 The drying System oett tero RIP Y RENI RERIU SR E RAE L E PA oo E YN EINE PEN 11 What is desiccant Zaen eats oett bullas dest uec Ey abes Goose due lanas 11 The Process Regeneration CYCIC sscccccccecccceseeenceeeesenaeeeeesnaaeeeeeenaeeessenneeeans 11 2 3 Standard EeSatulBS s cut dote edet fU kei deridet etu aede kine 11 Mechanical Features d M 11 Electrical Fealures arsi iotee Mere taie ees edt Ls ness olim eeoa 11 Controller FORTUTBS a riim oret deep Nate bla Md n p ead esiti besar b te Lobos nuptae 11 MEO Dn eR P c 12 2 5 Safety Devices and Interlocks eee tete ette tee enr de ctt sn repa ea 12 CHAPTER 3 INSTALLATION cnin noon x 14 gel Unerating the Equipment ce e iode de irs ees esent a ae a Den U edu 14 3 2 Rigging and Placing the Dryer iis oerte t Here ero a ee e Reb re a ER RA 14 3 3 Electrical Connections PEE 16 3 4 Setup diors is U Roue CM ttrt Nea MeN oh ata Soe te aah eh ea a hs 17 Checking for Proper Blower Rot
31. er Default timing for regeneration is 35 minutes for HEATING and 30 minutes for COOLING 4 If either the left or right bed safety temperature switch opens a regen heater fault is generated HIGH TEMP is displayed on the relay screen The alarm horn and light are activated Pressing the ALARM RESET pushbutton will deactivate the alarm horn and light 5 If the OMRON controller faults the optional redundant high temperature safety device opens or the process heater safety switch opens a process heater fault is generated HIGH TEMP is displayed on the relay screen The alarm horn and light are activated The process heater regen heater and process regen blower are turned off Pressing the ALARM RESET pushbutton will deactivate the alarm horn and light Turn the Off On Start switch to the START position to restart the dryer If the fault condition still exists the dryer will not restart 6 If the process blower overloads trips a process blower fault is generated PROC BLWR is displayed on the relay screen The alarm horn and light are activated The process heater regen heater and process regen blower are turned off Pressing the ALARM RESET pushbutton will deactivate the alarm horn and light Dehumidifying Dryers Chapter 4 Operation 30 of 53 Reset the motor overload and turn the Off On Start switch to the START position to restart the dryer 7 The valve position limit switch enables the right bed heater and provides an
32. er 3 Installation 18 of 53 Chapter 4 Operation 4 1 1 Start up Turn on energize the disconnect switch in your power drop and then turn on the one on the dryer Turn the system ON OFF switch to ON to energize the display panel Close the slide gate at the bottom of the drying hopper Make sure that the blowers turn in the right direction Fill the drying hopper with material Turn the dryer ON switch to START to start the dryer The process blower starts 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 Make sure the aftercooler has the proper supply water temperature Set the process set point on the temperature controller After the proper pre drying time for the initial hopper fill has elapsed fully open the drying hopper slide gate Turn on the machine convey ON OFF switch to ON and set the convey timer for the proper conveying time Note To allow proper residence time during continuous processing maintain the material level in the hopper at the midpoint of the air trap assembly Controller Description and Operation Identifying Control Panel Indicator Lights and Switches for the Standard Controller Switches System OFF ON START Switch This switch energizes or de energizes control power to the indicator panel and starts the dryer The controller
33. from dryer Dehumidifying Dryers Chapter 1 Safety 6 M When welding or brazing in or around this equipment make sure VENTILATION is ADEQUATE PROTECT adjacent materials from flame or sparks by shielding with sheet metal An approved FIRE EXTINGUISHER should be close at hand and ready for use if needed M Do not restore power until you remove all tools test equipment etc and the equipment and related components are fully reassembled M Only PROPERLY TRAINED personnel familiar with the information in this manual should work on this equipment 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 4 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 engaged in the use of the machine should become familiar with its operation as described in this manual Proper operation of the machine promotes safety for the operator and all workers in its vicinity Each individual must take responsibility for observing the prescribed safety rules as outlined All warning and danger signs must be observed and obeyed All actual or potential danger areas must be reported to yo
34. from exceeding the upper temperature range set by the ESCN Temperature Controller Standard dryers use a microprocessor based controller for limiting the process air temperature The controller is a modular self contained unit removable from the mounting housing All parameters are factory set and adjusted normally no field adjustment to the internal controls are necessary Figure 8 Typical Redundant Safety Controller Display Part No A0568961 Setting the Redundant Safety Controller The Redundant Safety Controller alarm setting is changed by pressing the up and down keys to input the alarm value The upper display reading indicates the Process Value while the lower display indicates the High Point Setting alarm value The factory setting for the High Point Alarm Value L1 hi_ is 150 F 23 C Restoring the WATLOW Redundant Safety Controller to Factory Setup If the preset parameters on the controller have been tampered with and it no longer functions properly see page 28 for Factory Default This controller is not meant to be modified WATLOW Operating Parameters The WATLOW controller has only one mode selection ALARM The factory sets the security level to protect the critical parameters from being accidentally changed Below is an explanation of the modes you will have access to and the manufacturer default settings Dehumidifying Dryers Chapter 4 Operation 26 of 53 Entering Operating Parameters to Select Modes To e
35. ge Earth Ground Inside Enclosure Protected Earth Lifting Point Ground 1 3 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 international regulations To avoid possible personal injury or equipment damage when installing operating or maintaining this equipment use good judgment and follow these safe practices vV Read and follow these operation and installation instructions when installing operating and maintaining this equipment If these instructions become damaged or unreadable additional copies are available from the manufacturer Follow all SAFETY CODES Wear SAFETY GLASSES and WORK GLOVES Work only with approved tools and devices Disconnect and or lock out power before servicing or maintaining the equipment Use care when LOADING UNLOADING RIGGING or MOVING this equipment A RA RRAK NX Operate this equipment within design specifications M OPEN TAG and LOCK ALL DISCONNECTS before working on equipment You should remove the fuses and carry them with you M Make sure the equipment and components are properly GROUNDED before you switch on power M Use EXTEREME CAUTION when working with dryer HIGH HEAT can be dangerous Keep body parts tools clothing and debris away
36. he Alarms on the Controller located within the unit enclosure unless you are a qualified electrician c The valve will normally complete one full cycle revolution If the drying process shuts down due to an alarm the dryer has been setup to have the following operational features e The bed in process at power down will remain in process e The bed in regeneration at power down will remain in regeneration e The regeneration timing cycle will restart from the beginning 9 Once the control power is on and no fault conditions exist turning the OFF ON START switch to the START position will start the dryer as follows a The process heater is turned on and controlled by the ESCN controller b The process regen blower is started c Theregen heater is turned on and the regeneration timing sequence is initiated The regen heater is controlled by the E5C2 controller For default timing settings for regeneration see the table below Model Heating Cooling 15 cfm 30 cfm 38 39 60 cfm 40 40 4 If either the left or right bed safety temperature switch opens a regen heater fault is generated HIGH TEMP is displayed on the relay screen The alarm light is activated The regen heater is turned off Dehumidifying Dryers Chapter 4 Operation 28 of 53 5 If the 1TCU ESCN controller faults the optional redundant high temperature safety device opens or the process heater safety switch opens a heater fault
37. ing to the dryer The power drop must include a ground wire Make sure all electrical connections are tight Dehumidifying Dryers Chapter 3 Installation 16 of 53 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
38. ir set point temperature During setup it lets you increase the value of the parameter displayed on the set point LED readout Dehumidifying Dryers Chapter 4 Operation 21 of 53 Setting the Process Air Temperature When setting the process air temperature consult with the resin manufacture for the recommended drying temperature To change the process air temperature set point with the dryer running AM e Press to raise the set point to the temperature you want a WF e Press to lower the set point to the temperature you want Restoring the Process Air Temperature Controller E5CN to Factory Settings If the preset parameters on the controller have been tampered with and it no longer properly controls temperature and displays dew point you can restore the controllers to the factory setup Call the Service Department for detailed instructions E5CN Operating Parameters The ESCN controller has several mode selections Within each mode are numerous parameters that can be set The factory has set the security level to protect the critical parameters from being accidentally changed Below is an explanation of the operating modes you will have access to and on the following page are the manufacturers default settings Available ESCN Modes Operation Level Indicator Name Description Run Stop Mode When RUN is selected the control is running r S When STOP is selected the control
39. is generated HIGH TEMP is displayed on the relay screen The alarm light is activated The process heater regen heater and process regen blower are turned off Turn the OFF ON START switch to the START position to deactivate the alarm light and restart the dryer If the fault condition still exists the dryer will not restart 6 If the process blower overloads trips a process blower fault is generated PROC BLWR is displayed on the relay screen The alarm light is activated The process heater regen heater and process regen blower are turned off Reset the motor overload and turn the Off On Start switch to the START position to deactivate the alarm light and restart the dryer ys The valve position limit switch enables the right bed heater and provides an input signal to the programmable relay when actuated by the cam lobe When the cam lobe position is high the right bed is activated When the cam lobe position is low the left bed is activated Each heater is ON OFF controlled by the OMRON E5C2 controller 8 Upon completion of the HEAT portion of the regeneration sequence the regen heaters are disabled by the programmable relay and the COOL time begins 9 Once the Cool time has expired the valve motor is turned on until the cam switch makes a transition Upon making a transition the timing sequence is restarted for the new bed 10 When no fault conditions exist the display reads SYSTEM NORMAL 11 When a de
40. is stopped When the control is stopped the STOP display 5 lights The default is set to RUN Alarm Value 1 This setting is used to indicate how many degrees Mode AL 1 the process temperature will be allowed to exceed 35 F or 10 C the set point temperature An alarm output will turn off the dryer Dehumidifying Dryers Chapter 4 Operation 22 of 53 Adjustment Level Indicator nt Name Auto Tune Mode At Description See Page 19 of Chapter 3 for instructions on how to Auto Tune your dryer Note Although the controller is calibrated at the factory the manufacturer recommends that the unit be Auto Tuned prior to dryer startup LaS Temperature Input Shift Mode TnS This setting is used to offset an error between the set point and the actual temperature The entire input range is shifted by a set figure preprogrammed by the operator Proportional Band This setting controls the amount in which the Mode P manipulated variable MV is proportionate to the deviated value or controller error Integral Time Setting this feature gives the control an action that Mode I is proportionate to the time integral of the control error By using this setting proportional action is used in combination with integral action to offset the control error and the set point will begin to match the control temperature PV or process value LEE Derivative Time
41. l safety is sometimes forgotten in the desire to meet incentive rates or through a casual attitude toward machinery formed over a period of months or years Your employer probably has established a set of safety rules in your workplace Those rules this manual or any other safety information will not keep you from being injured while operating your equipment Learn and always use safe operation Cooperate with co workers to promote safe practices Immediately report any potentially dangerous situation to your supervisor or appropriate person REMEMBER e NEVER place your hands or any part of your body in any dangerous location e NEVER operate service or adjust the dryer without appropriate training and first reading and understanding this manual e NEVER try to pull material out of the dryer with your hands while it is running Before you start the dryer check the following e Remove all tools from the dryer Be sure no objects tools nuts bolts clamps bars are laying in the hopper area e If your dryer has been inoperative or unattended check all settings before starting the unit e At the beginning of your shift and after breaks verify that the controls and other auxiliary equipment are functioning properly e Keep all safety guards in place and in good repair NEVER attempt to bypass modify or remove safety guards Such alteration is not only unsafe but will void the warranty on your equipment e When changing c
42. ls the regeneration temperature heater housings 2 1 2 Insulated Delivery Air Hose Dehumidifying Dryers Appendix 48 of 53 Figure 17 Low Heat Model 120 F to 250 F Air Flow Schematic High pressure Pressure switch makes z peripheral sure the blower is regenerative blower functioning correctly Dryer valve p Hose Utilizing 40F dew point air to Process Return Air regenerate and cool Regeneration 4 Temperature the desiccant E Air Filter Thermocouple 3 Position 13X Molecular Sieve 8x12 mu beads o Low watt density d i heaters can 2 1 2 Double wall pod operate safely with Hose Insulated constructed minimum air flow stainless steel drying hopper heater housing and desiccant container High temperature snap switches monitor the heat status of the heater housings Regeneration thermocouple monitors and controls the regeneration temperature Optional Pre Cooler for Low Temperature Operation 120F to 180F Dehumidifying Dryers Appendix 49 of 53 7 4 Spare Parts List Figure 18 Level 1 Spare Parts List Electrical amp Mechanical f l LL Ln re LE ie LL iL LE EL i ii O O O JO O OF OF OJ OC CO OVO DRYER SPARE PARTS LIST AD15 AD30 AD60 2 2 2 2 2 8
43. ment use it The work platform should have secure footing and a place for tools and parts DO NOT climb on dryers machines or work from ladders 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 an electrical conductor that complies with current codes Install in accordance with national and local codes When you have completed the repair or maintenance procedure check your work and remove your tools rigging and handling equipment Do not restore power to the dryer until all persons are clear of the area DO NOT start and run the dryer until you are sure all parts are functioning correctly BEFORE you turn the dryer over to the operator for production verify all dryer enclosure panels guards and safety devices are in place and functioning properly Reporting a Safety Defect If you believe that your equipment has a defect that could cause injury you should immediately discontinue its use and inform the manufacturer The principle factors that can result in injury are failure to follow proper
44. ng coil back on Dehumidifying Dryers Chapter 5 Maintenance 41 of 53 6 Troubleshooting 6 1 Introduction The utmost in safety precautions should be observed at all times when working on or around the machine and the electrical components All normal trouble shooting must be accomplished with the power off or certified electrician should trouble shoot the unit line fuses removed and with the machine tagged as out of service The use of good quality test equipment cannot be over emphasized when troubleshooting is indicated Use a good ammeter that can measure at least twice the AC and DC current that can be encountered for the machine Be sure that the voltmeter has at least minimum impedance of 5 000 OHMS per volt on AC and 20 000 OHMS per volt on DC scales Popular combination meters VOM and VTVM can be selected to provide the necessary functions Before making haphazard substitutions and repairs when defective electrical components are malfunctioning we recommend that you check the associated circuitry and assemblies for other defective devices It is common to replace the obviously damaged component without actually locating the real cause of the trouble Such hasty substitutions will only destroy the new component Refer to wiring diagrams and schematics Locating mechanical problems should they occur is relatively straightforward When necessary refer to the parts catalog section Alarm Message Cause Correctiv
45. nter the display 1 Press both the Up s and Down keys for three seconds from the home page The word SEE will appear in the upper display and PAGE will appear in the lower display 2 Press the Advance Key to move through the parameter prompts 3 Press the Up J or Down jJ keys to change the parameter value 4 Press the RESET Key at any time to return to the Home Page display Figure 9 Setting List for Redundant Safety Controller WATLOW Part No A0568961 Mode Parameter Setting range Default Manf setting 1 S dEC Temp Decimal Places 0 00 5 0 0 00 0 INFOSENSE 0 00 SEn Sensor Type 0 3 0 Lin Thermocouple Linearization 0 10 0 H C F Temperature Units Fahrenheit Celsius F 3g pu o No 4 Sc Lo Process Scale Low 4 00 to 20 00 mA 1 00 to 10 00V Sc hi Process Scale High 4 00 to 20 00 mA 1 00 to 10 00V CAL Calibration Offset 999 to 999 Input Filter Off DiSP Cont both Output 1 Function Limit 2 Output 1 Limit Sides Both High Low Limit 1 Hysteresis 0 0 to 999 0 Output 2 Function Off Process Alarm Limit 2 Output 2 Sides Both high low None Process Value Limit 1 Low Set Limit 1 High Set Limit 2 Low Set Limit Upper Display Look 2 High Set Alarm 2 Low Set Alarm 2 Process High Set Limit 3 Low Set Limit 3 High Set Alarm 3 Low Set Alarm 3 High Set None Process Value Limit 1 Low Set Limit 1 High Set Limit 2 Low Set Limit Lower Display Look 2
46. ontrol settings to perform a different mode of operation be sure selector switches are correctly positioned Locking selector switches should only be adjusted by authorized personnel and the keys removed after setting e Report the following occurrences IMMEDIATELY e unsafe operation or condition e unusual dryer action e leakage e improper maintenance Dehumidifying Dryers Chapter 1 Safety 8 e NEVER stand or sit where you could slip or stumble into the dryer while working on it e DO NOT wear loose clothing or jewelry which can be caught while working on a dryer In addition cover or tie back long hair e Clean the dryer and surrounding area DAILY and inspect the machine for loose missing or broken parts e Shut off power to the dryer when itis not in use Turn the switch to the OFF position or unplug it from the power source Maintenance Responsibility Proper maintenance is essential to safety If you are a maintenance worker you must make safety a priority to effectively repair and maintain equipment Before removing adjusting or replacing parts on a machine remember to turn off all electric supplies and all accessory equipment at the machine and disconnect and lockout electrical power Attach warning tags to the disconnect switch When you need to perform maintenance or repair work on a dryer above floor level use a solid platform or a hydraulic elevator If there is a permanently installed catwalk on your equip
47. ookmark not defined CHAPTER 7 APPENDIX ideni pecora d bao nak a coax ai 45 TN NNEC rom ERE 45 Warranty SDOCHICAUON Ss Joost israel deseas eap Rocca eti ated ode Uode pe ted ge etos pa 45 Warranty Restrictions cies ceca i rire eoe Ret ee ree ERU a OPE t geo ges Neues S tene 45 Warranty EIabIl IOS aote m tmES NIE I ER M MN 45 Customer THiesponsiDI BS iiu etate cry oot eram Eu ded yr eoa ee RAE NIN D aus eesessantees 46 7 2 Technical Specifications eeessssissessssseeeeeeeenne nennen nennen nennt 46 T bacilgioit ior PEE 46 Aftercooler Design SDOcITICallOIIS hoo iras oleo ton evenit lus bb ete ta Rea deseces 47 7 3 Drawings and DIagraris dr ote rri tedexe ina t eda Hb E Re Rhe 47 T4 Spare Pans LISt P 50 7 5 Returned Material PollGy usce att roe Re teda peor Ses ste edeaderghcccnacecmnceussemueseeeeats 52 Gredit Returns T aaia 52 Warranty Betis eiue etico rt sett Rete deeo helena te e rotta b ets totas eMe 52 7 6 Dryer Identification Serial Number Tag sese 52 J f Technical ASSISIanco ci eer cete uere naa oai beca hing eiTe Ra sr eani 53 PAHS Deparment eo ccc destruir ee a E e rap ec i idem eue ceca 53 Service Deae uode Mies os detedote edente ipe quM N D pter a e PR rer edes 53 Sales DeDArtmehlL doe nated atte OI toes odes suas nocde RO TUE o EUR DONE peque TuDE 53 Contract Depanment sass ie Dodo eum dba eu ix oso dti dena e ved odie hone ona
48. operating procedures i e lockout tag out or failure to maintain a clean and safe working environment Dehumidifying Dryers Chapter 1 Safety 9 Chapter 2 Functional Description 2 1 Models Covered in This Manual This manual provides operation installation and maintenance instructions for 15 30 and 60 cfm dehumidifying dryers Model numbers are listed on the serial tag Make sure you know the model and serial number of your equipment before contacting the manufacturer for parts or service Our dehumidifying mini dryers are designed to generate heated dehumidified air at a very low dew point at carefully controlled temperatures for use in plastic drying systems The dryer circulates hot air through a column of plastic resin in the large drying hopper The resin in the hopper is discharged through a slide gate in a first in first out manner 2 2 General Description The Drying System Dehumidifying dryers are used to generate very low dew point air heated to a controlled temperature for drying plastic pellets and regrind Our dryers force hot dry air through resin in a drying hopper where air picks up moisture from the material and draws it back to the dryer In the dryer a desiccant bed strips moisture from the air The dried process air is then re heated and delivered back into the drying hopper for more moisture removal Portion of the low dew point process air is directed to the desiccant tank that is off process This ai
49. ors occur SV 8 8 8 8 Set Value Numeric LED During normal operation the set value SV numeric LED indicator displays the process set point temperature selected for the dryer The dryer then maintains this set point temperature This LED indicator also displays parameter and pre set function values during configuration setup OUT1 Out 1 LED Lit when Control Output 1 is on The Out1 indicator lights when the controller signals the process heaters to be energized OUT2 Out 2 LED Lit when Control Output 2 is on Not used in this application AT AT LED Flashes during auto tuning in process value PV screen Indicator Name Description ALARMI ALARM 1 LED Lights in the Operation Indicator Section when the output function assigned to auxiliary output 1 turns on The ALARMI indicator lights when the process temperature exceeds the set point temperature by more than the alarm deviation value Identifying Temperature Controller Keys Indicator Name Description CO Mode Key Press the Mode key to shift the display to the next set of parameters The menu screen displays Down Key Press the Down arrow key to 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 A Up Key Press the Up arrow key to raise the process a
50. r Once every six months the dryer operator should monitor the initial dew point sensor readings and establish a periodic replacement schedule as needed Caution Do not attempt to check the continuity or resistance of the dew point sensor The sensor will be destroyed Dehumidifying Dryers Chapter 5 Maintenance 36 of 53 5 3 Corrective Maintenance This section provides you with the information necessary to correct or repair any issues which might appear during the normal operation of your dehumidifying dryer Although we have listed how to perform these procedures it is recommended that you call the Service Department to have any in depth maintenance performed Symptoms of Worn Desiccant The moisture absorption capacity of the desiccant used in your dehumidifying dryer degrades after an indefinite period of time Useful life depends on variables such as the condition of the process filter how much dust and fines have been passed through the filter and got into the desiccant chamber and plasticizer vapors in the return air WARNING Handling desiccant material is HAZARDOUS Wear an N 100 type safety filter mask or equivalent to avoid prolonged breathing of desiccant dust Wear safety goggles and gloves to avoid contact with eyes and skin Handle with adequate ventilation e Wash hands thoroughly after handling In case of eye contact immediately flush eyes with plenty of water for at least 15 minutes SEE A PHYSICIAN
51. r Responsibilities Any sales use or other tax incident to the replacement of parts under this warranty is the responsibility of the purchaser Technical Specifications Annex B Information The following design information is provided for your reference No modifications are allowed to this equipment that could alter the CE compliance Ambient temperature 0 degrees Celsius Maximum 104 degrees Fahrenheit Humidity range 50 relative humidity Altitude Sea level Environment Clean dust free and non explosive Radiation None Vibration Minimal i e machine mounting Allowable voltage fluctuation 10 Allowable frequency fluctuation Continuous 1 Intermittent 2 10 Nominal supply voltage 460 3 60 Verify on serial number tag 11 Earth ground type TN system has one point directly earthed through a protective conductor 12 Power supply should include a ground connection 13 Over current protection is supplied in the dryer but additional protection should be supplied by the user 14 The door mounted disconnect serves as the electrical disconnect device 15 Dryer is not equipped with local lighting 16 Functional identification 17 Dryer is equipped with a CE mark 18 Cable support may be required for power cord depending on final installation 19 No one is required to be in the interior of the electrical enclosure during the normal operation of the unit Only skilled electricians should be insi
52. r is heated to approximately 450 F 232 C before entering the bed that is in regeneration The moisture is then forced from the desiccant before being exhausted into the atmosphere A small amount of ambient air is introduced into the process return air filter to make up for the air lost during the bed regeneration To compensate for the humidity content in the air this dryer is supplied with the proper amount of desiccant What is desiccant Desiccant is a material that attracts and holds absorbs water from the air The desiccant our dryers use is a synthetic crystalline metal aluminosilicate blended with a clay binder and formed into beads The Process Regeneration Cycle Our dryers have two desiccant beds While one bed is on line in the process air loop the other is off line being regenerated When a desiccant bed is on line it absorbs moisture from the process air In time the bed becomes saturated with moisture and needs to be regenerated The dryer automatically redirects the process airflow to the second bed and starts the regeneration cycle on the first bed During regeneration the dryer system heats the very low dew point air and forces it through the desiccant bed The moisture driven off the bed bleeds to the atmosphere Dehumidifying Dryers Chapter 2 Functional Description 10 of 53 2 3 Standard Features Mechanical Features e Dual desiccant beds e Electrically actuated air valve e 13X Molecular Sieve e
53. rding your wish for assistance and to obtain an RMA return material authorization number If the Shipment is Not Complete Check the packing list as back ordered items are noted on it You should have Mi Dehumidifying Dryer M Bill of lading M Packing list V Operating and Installation packet V Electrical schematic and panel layout drawings M Component instruction manuals Re inspect the container and packing material to see if you missed any smaller items during unpacking If the Shipment is Not Correct If the shipment is not what you ordered contact the shipping department immediately For shipments in the United States and Canada call 1 800 233 4819 for all other countries call our international desk at 630 475 7491 Have the order number and item number available Hold the items until you receive shipping instructions Returns Do not return any damaged or incorrect items until you receive shipping instructions from the shipping department Dehumidifying Dryers 2 Table of Contents CHAPTER 1 SAFETY resdan ae aaa aAa AAAA A 5 14 Howto Use This Manual rre es ctaceniedenvtanetieie cay teaeenabeeeeee 6 Safety Symbols Used in this Manual sse 6 1 2 Safety Tag Information ue ce rtu e dte edite cer eee RR eda Se ee ee 7 1 3 Warnings and Precautions eiecit tore opone had ee etit OR OR ERR RETI ARS 6 i Ec lelmecccm 7 General HesponsiDIlily i tr ete E ete d ERU e E IUe bene R
54. re just a few of the organizations that have joined with the plastics industry to develop safety standards Dehumidifying Dryers Chapter 2 Functional Description 12 of 53 Every effort has been made to incorporate these standards into the design of the drying system however it is the responsibility of the personnel operating and maintaining the equipment to familiarize themselves with the safety procedures and the proper use of any safety devices Fail Safe Operation If a safety device or circuit should fail the design must be such that the failure causes a Safe condition As an example a safety switch must be a normally open switch The switch must be held closed with the device it is to protect If the switch fails it will go to the open condition tripping out the safety circuit At no time should the safety device fail and allow the operation to continue For example if a safety switch is guarding a motor and the safety switch fails the motor should not be able to run Safety Device Lock Outs Some safety devices disconnect electrical energy from a circuit The safety devices that are used on these dryers are primarily concerned with electrical power disconnection and the disabling of moving parts that may need to be accessed during the normal operation of the machine Some of the safety devices utilize a manual activator This is the method of initiating the safety lock out This may be in the form of a plug lever or a h
55. t sales representatives Contact our Sales Department for the name of the sales representative nearest you Contract Department Call 630 595 1060 Monday Friday 8am 5pm CST Let us install your system The Contract Department offers any or all of these services project planning System packages including drawings equipment labor and construction materials and union or non union installations Dehumidifying Dryers 7 Appendix 53 of 53
56. the following pages show a suggested safe rigging diagram It lets you lift the dryer hopper unit vertically using a fork truck for installation on the machine throat Adjust chain lengths at the center sling bracket before you lift the unit Your dryer has built in lifting lugs Caution If you are mounting a machine mount dryer with a magnet or transition adaptor on the machine throat you must provide additional support to hold the dryer securely on the machine Be aware that off center static and dynamic hopper loading can occur with machine vibration Again provide additional support to hold the dryer securely on the machine For 60 cfm dryer units you must provide additional support to stabilize these units and to protect personnel when installing on machine throats Use caution and observe safety rules when lifting and placing your dryer Dehumidifying Dryers Chapter 3 Installation 14 of 53 Figure 1 Suggested Lift Rigging for Cart Mount Dryers o Caution Do not use a hoist to move or rig your Drying Conveying System when it is mounted on a cart Moving the unit with a hoist will cause it to become unstable and may cause damage to the equipment and or injury to personnel Figure 2 Suggested Lift Rigging for Cart Mounted Dryers Note Note Floor Mounted Dryers can be lifted by hoist or fork USE Overhead Crane Dehumidifying Dryers Chapter 3 Installa
57. those areas of the equipment requiring service Preventive maintenance sections are included to ensure that your drying system provides excellent long service The Troubleshooting chapter serves as a guide for identification of most common problems Potential problems are listed along with possible causes and related solutions The Appendix contains technical specifications drawings schematics parts lists and available options A spare parts list with part numbers specific to your machine is provided with your shipping paperwork package Refer to this section for a listing of spare parts for purchase Have your serial number and model number ready when ordering Safety Symbols Used in this Manual The following safety alert symbols are used to alert you to potential personal injury hazards Obey all safety messages that follow these symbols to avoid possible injury or death DANGER DANGER indicates an imminently hazardous situation that if not avoided will result in death or serious injury WARNING WARNING indicates a potentially hazardous situation or practice that if not avoided could result in death or serious injury Caution CAUTION indicates a potentially hazardous situation or practice that if not avoided may result in minor or moderate injury or in property damage Dehumidifying Dryers Chapter 1 Safety 5 of 53 1 2 Safety Tag Information Dryer Safety Tags Hot Read Operation UN and Installation Manual High Volta
58. ting AT execute cancel ON OFF Adjustment Proportional Band 0 1 to 999 9 8 0 Derivative Time 0 to 3999 40 Dehumidifying Dryers Chapter 4 Operation 24 of 53 Process Air Dew Point Display Optional The Process Air Dew Point meter indicates the current process air delivery moisture content Standard dryers use a microprocessor based controller for displaying dew point air temperature The controller is a modular self contained unit removable from the mounting housing All parameters are factory set and adjusted normally no field adjustment to the internal controls is necessary Figure 7 Typical Dew Point Display Monitor Part Number A0555757 Note The only functional buttons on this controller are the up and down keys Setting the High Dew Point Alarm The high dew point alarm setting is changed by pressing the up and down keys to input the alarm value The factory setting for Alarm Value 1 AL TI is 10 F 23 C Restoring the Process Air Dew Point Meter E5CK to Factory Setup If the preset parameters on the controller have been tampered with and it no longer functions properly call the Service Department This controller is not meant to be modified Note The dew point alarm monitors and indicates a deviation from the set point Dehumidifying Dryers Chapter 4 Operation 25 of 53 Redundant Safety Controller Display Optional The Redundant Safety Controller limits the process air temperature
59. tion 15 of 53 Figure 3 Suggested Lift Rigging for Cart Mounted Dryers Mounting flange m E Diameter hole F Notes Hopper mounting flanges on 0 75 and and 1 5 cu ft 20 amp 40 liter hoppers are supplied blank so the customer can drill to match existing machine throat 3 0 cu ft 80 liter hoppers and larger are not supplied with a cast flange as shown Caution When using a hoist to move a machine mounted dryer ALWAYS attach chains to the three 3 locations lifting points on the unit Moving the Dryer without the chains attached to all of the lifting points will cause the unit to become unstable and may cause damage to the Dryer and or injury to personnel 3 3 Electrical Connections When making electrical connections to your dryer ensure that you take into consideration and make arrangements for the following e A qualified electrician should make all electrical connections Fulfill all national state and local safety and electrical code requirements The serial tag lists voltage phase and amp draw information e Line voltage must be within plus or minus ten percent 410406 of the voltage listed on the serial tag or damage may occur Phase imbalance must be less than two percent 2 Connect main power to the dryer at the disconnect or terminals in the upper right corner of the control enclosure Install a fused disconnect with a lockout feature in the power main lead
60. unt adapter to accommodate a dryer and corresponding hopper e Low temperature operation below 180 F 82 C includes an u internal cooler e Redundant high temperature safety circuit e Cart with caster with hopper mounting place e Insulated air hose for air delivery e Audible alarm e Dew Point monitor with digital read out 2 5 Safety Devices and Interlocks This section includes information on safety devices and procedures that are inherent to the Dryer This manual is not intended to supersede or alter safety standards established by the user of this equipment Instead the material contained in this section is recommended to supplement these procedures in order to provide a safer working environment At the completion of this section the operator and maintenance personnel will be able to do the following e Identify and locate specific safety devices e Understand the proper use of the safety devices provided e Describe the function of the safety device Safety Circuit Standards Safety circuits used in industrial systems protect the operator and maintenance personnel from dangerous energy They also provide a means of locking out or isolating the energy for servicing equipment Various agencies have contributed to the establishment of safety standards that apply to the design and manufacture of automated equipment The Occupational Safety and Health Administration OSHA and the Joint Industrial council JIC a
61. ur immediate supervisor General Responsibility No mater who you are safety is important Owners operators and maintenance personnel must realize that every day safety is a vital part of their jobs If your main concern is loss of productivity remember that production is always affected in a negative way following an accident The following are some of the ways that accidents can affect your production e Loss of a skilled operator temporarily or permanently e Breakdown of shop morale Costly damage to equipment e Downtime An effective safety program is responsible and economically sound Organize a safety committee or group and hold regular meetings Promote this group from the management level Through this group the safety program can be continually reviewed maintained and improved Keep minutes or a record of the meetings Hold daily equipment inspections in addition to regular maintenance checks You will keep your equipment safe for production and exhibit your commitment to safety Dehumidifying Dryers Chapter 1 Safety 7 Please read and use this manual as a guide to equipment safety This manual contains safety warnings throughout specific to each function and point of operation Operator Responsibility The operator s responsibility does not end with efficient production The operator usually has the most daily contact with the equipment and intimately knows its capabilities and limitations Plant and personne
62. used under recommended conditions as set forth in the operating manuals for such equipment THE FOREGOING EXPRESS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES GUARANTIEES AGREEMENTS AND SIMILAR OBLIGATIONS OF THE COMPANY AND OR MANUFACTURER UNLESS OTHERWISE SPECIFIED IN THE SPECIFIC PRICE PAGE OR LIMITED BY THE MANUFACTURERS WARRANTY FOR PARTS The Company s obligation is limited to repair or replace FOB the factory any parts that are returned prepaid within one year of equipment shipment to the original purchaser and which in the Company s opinion are defective Any replacement part assumes the unused portion of this warranty Warranty Restrictions This parts warranty does not cover any labor charges for replacement of parts adjustment repairs or any other work This warranty does not apply to any equipment which in the Company s opinion has been subjected to misuse negligence or operation in excess of recommended limits including freezing or which has been repaired or altered without the Company s express authorization If the serial number has been defaced or removed from the component the warranty on that component is void Defective parts become the property of the warrantor and are to be returned immediately without any further use or handling Warranty Liabilities THE COMPANY EXPRESSLY DISCLAIMS ANY AND ALL LIABILITY FOR ANY SPECIAL CONSEQUENTIAL OR INCIDENTAL DAMAGES OR EXPENSES THAT RESULT FROM
63. uts down valve may not have position Re adjust the Process blower OFF been wired correctly switch to make sure it trips Process heaters OFF The valve has made when it is at the high Regen heaters OFF enough rotations and position and it does not Alarm light is ON the correct position of touch the cam when it is at Alarm horn is ON the valve was not the low position detected The switch is indicating the Valve motor ornot incorrect desiccant tank is in connected to 120V at ical Check the PLC Circuit wiring o the switch against the wiring diagram Make sure all the wire connections are tight Limit switch may be faulty Replace the switch and make sure the wires are connected correctly 6 2 Determining Temperature Controller Errors or Sensor Errors Using a Thermocouple If the controller displays a temperature that is close to room temperature 70 F 21 C when you short circuit controller input terminals the controller is normal and the sensor is probably broken short circuited or incorrectly wired Other service problems or questions can be answered by contacting the Service Department Dehumidifying Dryers 6 Troubleshooting 44 of 53 7 Appendix 7 1 Warranty Unless otherwise specified this product includes a Standard ONE YEAR PARTS WARRANTY Warranty Specifications The manufacturer hereby expressly warrants all equipment manufactured by it to be free from defects in workmanship and material when
64. w Point Sensor Manita A0548558 Gasket for the DewPointSensor Dehumidifying Dryers Appendix 51 of 53 7 5 Returned Material Policy Credit Returns Prior to the return of any material authorization must be given by the manufacturer A RMA number will be assigned for the equipment to be returned Reason for requesting the return must be given ALL returned material purchased from the manufacturer returned is subject to 15 75 00 minimum restocking charge ALL returns are to be shipped prepaid The invoice number and date or purchase order number and date must be supplied No credit will be issued for material that is not within the manufacturer s warranty period and or in new and unused condition suitable for resale Warranty Returns Prior to the return of any material authorization must be given by the manufacturer A RMA number will be assigned for the equipment to be returned Reason for requesting the return must be given All returns are to be shipped prepaid The invoice number and date or purchase order number and date must be supplied After inspecting the material a replacement or credit will be given at the manufacturer s discretion If the item is found to be defective in materials or workmanship and it was manufactured by our company purchased components are covered under their specific warranty terms Dryer Identification Serial Number Tag Located
65. w point fault is generated by the optional dew point controller the alarm light will activate The alarm light will flash indicating a non critical fault Press Alarm Reset to deactivate the alarm until the next dew point fault occurs 12 The top 2 lines of the display show the HEAT and COOL times in minutes for the regeneration sequence Changes to these times can be made by the operator as follows a Press the up or down arrow until the cursor is positioned at the number to be changed LLLI b Press the key to increment the number or the number key to decrement the c Press the OK key to accept the value and write to the relay memory OR d Press the ESC key to cancel the changes Note A change will NOT take effect until step 12 c is done 13 The dryer is shut off by turning the control power switch to the OFF position 14 Refer to Schematic drawing A0566087 enclosed in the control enclosure Controller Operation With Optional Alarm Horn amp Reset Button l Turn the disconnect on the control panel to the ON position Power is applied to the voltage line fuses line side of the control power switch and the temperature controller 2 Turn the control power switch to the ON position Power is applied to the programmable relay and dew point controller The valve will move to the start position as follows Dehumidifying Dryers Chapter 4 Operation 29 of 53 a The valve motor rotates until the cam

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