Sterling STT 500 Dehumidifier User Manual
Contents
1. Return air temperature is continuously monitored the return air cooler is activated only when nee ded If the return air temperature exceeds the set value e g due to interruption in the cooling wa ter supply or soiling an alarm message is given The return air cooler can be connected to a coolant circuit or to the water mains network Functional description 6 4 SM2 620 STT 500 6 4 Hopper heaters optional If differing drying temperatures are required in the different drying hoppers hopper heaters must be installed on the drying hoppers The drying temperature of each drying hopper can be set cen trally at the dryer 6 5 Automatic motor flaps optional Automatic motor flaps cut off the drying hopper from the drying circuit as soon as the material is completely dried The supplementary heating system is also switched off Dehumidified air flows into the drying hopper only after new moist material is added to the hopper This ensures thatthe material is not damaged and saves a considerable amount of energy Temperature probes atthe feed opening of the drying hopper and inside the drying hopper enable comparison of feed opening and material temperature from which the drying degree of the mate rial can be calculated If the drying hopper is to be cleaned or blocked the motor flap can be closed via the dryer The supplementary heating system is then automatically switched off 6 6 Connection to a pneumatic convey2. North America emergencies after 5pm CST 847 439 5855 North America email acsuscanadacustserv corpemail com e Mexico Central amp South America Email acslatinamericacustserv corpemail com e Europe Middle East amp Africa 48 22 390 9720 Email acseuropecustserv corpemail com India 91 21 35329112 Email acsindiacustserv corpemail com e Asia Australia 86 512 8717 1919 Email acsasiacustserv corpemail com Sales and Contracting Department Our products are sold by a worldwide network of independent sales representatives Contact our Sales Department for the name of the sales representative nearest you 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 For assistance with your sales or system contracting needs please Call North Central and South America 1 262 641 8600 or 1 847 273 7700 Monday Friday 8am 5pm CST Europe Middle East Africa 48 22 390 9720 India 91 21 35329112 Asia Australia 86 512 8717 1919 Facilities ACS offers facilities around the world to service you no matter where you are located For more information please visit us at www acscorporate com United States Asia Australia India ACS India ACS Schaumburg Corporate Offices ACS Suzhou Gat No 191 1 Sandbhor Complex 1100 E Woodfield Road 109 Xingpu Road SIP Mhalu
3. When you have carried through all basic settings you can start with continuous operation Make sure that hoppers which are not in use are separated from the CE dehumidified air supply Make sure that the set drying temperatures are suited for the materials in the hoppers After first filling do not process the material until after the dwelling time If a return air cooler is installed switch on the coolant circuit of the return air cooler Make sure that the cooling appliance is connected to the mains socket if present optional Check setting of the timer Select Main menu Acknowledge with the ENTER key or Press the F2 key Select Dryer on Acknowledge with the ENTER key Start up 3 18 SM2 620 3 7 Viewing system runtime Select System runtime Acknowledge with the ENTER key or Press the SHIFT key and the F2 key System runtime PLC X XX h r blwr X XXh m blwr X XX h STT 500 LI The runtime of the blowers and the PLC SPS is shown in hours Start up 3 19 SM2 620 STT 500 3 8 Switching the dryer off Select Main menu Acknowledge with the ENTER key or Press the F2 key Select Dryer off Acknowledge with the ENTER key A Wait until the regeneration phase is finished and the blower has come to a standstill Switch off the dryer at the main switch Disconnect the power supply Never switch off the dryer directly at the main switch
4. To do so proceed as follows 1 In the input field press i Shift LED is on The list of options with its configured symbolic inputs is activated 2 Select the value you require using the arrow keys 3 Enter the value you p selected by pressing Shift Lock mode is de activated automatically 10 00GB Accessories Flap control with Fuzzy Logic Sterling Material Processing 10 00GB Flap control with Fuzzy Logic Observe that the hopper is not switched off after the flap has closed Turning hopper off see chapter start up turning the devices on off Control unit flap Switch position 0 Quick closing flap closes quick 1 Slow closing flap closes controlled 2 Automatic control flap operates pulsed opening closing
5. 5 5 Setting date and time 0 2 eee 3 14 3 5 6 Viewing changing language and contrast 3 15 3 5 7 Changing parameters 0 0 ee 3 16 3 5 8 Setting the timer sisse eee ke ke ees 3 17 3 6 Starting continuous operation 0 0 eee 3 18 3 7 Viewing system runtime 1 6 eee 3 19 3 8 Switching the dryer off cea vee eda deed ede eee ed 3 20 4 Error and error correction ccc cc ues dee ee eee es eK CR RR ee CR 4 1 SM2 620 STT 500 5 Maimntenal6E uusacex oe ae es Re ac A CR ee Ka Rica E KORR CROCI 5 1 5 1 Maintenance intervals 022 62 262s eee RR e Re RR ERR Rh 5 3 5 2 Cleaning renewing the air filters llle 5 4 5 3 Ternisioning the V belts sn bead seek bees Set weed RA E ERR Beet ERI UE 5 8 5 4 Disposing of the drying agent 0 eee eee 5 10 5 5 Servicing the accessories 6 eee 5 10 5 6 Changing the battery of the control system 0 000 eee eee 5 11 5 6 1 Resetting the control values llsillelle eres 5 13 6 Functional description 000 c eee eee 6 1 6 1 DYE csc c cats eae EET 6 2 6 2 Drying hopper optional sssr 0 0 cee 6 3 6 3 Return air cooler cob ERR OU abe CREE RE ed ee ee td 6 4 6 4 Hopper heaters optional 0 000 seh 6 5 6 5 Automatic motor flaps optional 0 2 0 0 0 00 cee ee 6 5 6 6 Connection to a pneumatic conveying system optional 6 5 7 Tra
6. Limbs may be caught in machinery Injury through burns Safety instructions 2 3 SM2 620 Dehumidified Air Dryer When drying plastics which emit gases dangerous for human health take care that the regenera tion exhaust air is disposed of without polluting the environment This will prevent danger to peo ple and material Maintenance Before starting maintenance work appoint a supervisor Inform the responsible personnel before maintenance work on the system is started Caution Danger of accidents Disconnect the equipment from mains supply before starting maintenance procedures to ensure that it cannot be switched on unintentionally Caution Danger of accidents All pipes hoses and screwed connections should be checked regularly for leaks and damage Any faults which arise should be corrected immediately Danger of accidents Depressurise all compressed air piping before starting maintenance work Danger of accidents The air filters should only be cleaned replaced when the the main switch is off and the blower has stopped This avoids injury and damage to equipment Any maintenance work on the equipment should only be started when the the main switch is off and the blower has stopped This avoids injury and damage to equipment Check the v belts of the blower only when the main switch is switched off and the blowers have stopped Caution Danger of accidents Open drying hoppers only if they are completely empty Danger o
7. Start up 3 20 SM2 620 Dehumidified Air Dryer 4 Error and error correction This chapter is directed at the operators of the equipment This chapter assumes general skills in dealing with drying systems and SPS PLC control units This chapter assumes that the start up description has been read and un derstood Itshould be ensured in each and every case that the operators have the rele vant skills Error and error correction 4 1 SM2 620 Dehumidified Air Dryer LI Alarm messages are displayed in plain language on the screen of the op erator device The display of alarm messages in the operator device can only be erased by pressing the ACK key The failure is not repaired A failure is given by flashing of the LED alarm If the alarm message is acknowledged by pressing of the ACK key but the failure is not yet eliminated the flashing changes to steady light If a cooling appliance is present If the temperature inside the switch box is higher than 50 C 122 F the lamp alarm temperature inside switch box goes on If the temperature is still too high after 30 minutes the dryer is switched off Failures must be repaired immediately LED ALARM A failure is given by flashing of the LED alarm If the alarm message is acknowledged by pressing of the ACK key but the failure is not yet eliminated the flashing changes to steady light When there is no failure the L
8. This chapter assumes that the functional description has been read and un derstood Itshould be ensured in each and every case that the operators have the rele vant skills Note down all set values of the control system Make sure that the cooling appliance is connected to the mains socket in the electrical cabinet if present optional Make sure that any condensate penetrating from the cooling appliance optional does not get inside the dryer or the control box If the inside temperature of the switch cabinet is above 50 C 122 F the dryer is switched off after 30 minutes if itis operated with a cooling ap pliance optional Start up 3 1 SM2 620 STT 500 3 1 Control system The control system is switched on at the main switch The control system is operated via a selection window and the keyboard of the operator panel The facility s control system is factory programmed Nevertheless you have to set specific values basic parameters which are dependent on the processed material for instance The values entered are stored in the control system and remain so even after the unit is switched off or in the event of a power cut All messages are displayed in plain text In describing this start up we have assumed that the various sub menus are selected from the table of contents This structure of the description has been selected since in most cases you will only work on one item in the submenu If y
9. it may topple over Take care that the device is not standing on the mains cable This will prevent danger to people and material Operation Appoint an equipment foreman to be responsible for the equipment Ensure that the operating personnel are provided detailed instruction in the operation of the equipment Improper operation results in danger of accidents When the main switch is switched off for reasons pertaining to safety it must be secured against unauthorized activation Caution Danger of accidents Repair work may be carried out by trained personnel only Caution Danger of accidents Never operate the equipment when partially dismantled Danger Limbs may be caught in machi nery Electric shock In case of malfunction shut down the equipment immediately Have malfunctions corrected im mediately Danger of accidents The machine is intended only for the drying of granulated plastics Any other or additional use is contrary to specifications This equipment is not suitable for food processing The safety instructions of the connected machines must be followed Please note that sound levels exceeding 85 db A may in the long term damage your health Use the appropriate ear muffs This avoids impairment of hearing Please note that the drying cells drying hoppers and air pipings grow hot during use Avoid tou ching any of these parts Danger Injury through burns Never operate the dryer without side panels Danger
10. to this equipment must be observed Disconnect electrical components from the mains supply before work is carried out on these com ponents Caution Danger to life through electrical shock Compile detailed operating instructions based on these Operating instructions for the sequence of procedures to be carried out on this equipment Improper operation results in danger of acci dents Observe that the control system is still under voltage even when the main switch is switched off Caution Danger to life through electrical shock Safety instructions 2 2 SM2 620 Dehumidified Air Dryer Assembly Compare the connected loads with those of the mains supply Danger of injury through electrical shock When using lifting gear please observe the pertaining regulations Caution Danger of accidents Do not modify add other equipment or change the design of the equipment without the approval of the manufacturer Caution Danger of accidents Attachments not supplied by Sterling must be manufactured in accordance with safety regulation EN 294 Danger of accidents The equipment may only be operated when all the associated components are properly connec ted up and in accordance with the relevant regulations This avoids injury and damage to equip ment Operate the device only if all its components are grounded Danger accident through electrical shock Please note for installation that the equipment is top heavy Danger exists that
11. values refer to section 3 3 3 Confirm your input with You can cancel any incorrect ESC input by pressing The original value is then automatically reinserted in the field Insert the correct value and then enter the corrected value by pressing Position the cursor in the next input field insert the next value etc You can also use the arrow keys to move the cursor to the left or right to the previous input field to insert a different value in it Close the screen by pressing ESC 09 00 General Operation 3 3 1 Entering Numerical Values Input using numer ical keypad Changing the value Right justified input Limit value check Decimal places In fields that allow the operator to enter a numerical value you enter the nu merical value character by character using the keypad on the system key board If there is a value in the field already it is cleared completely from the field when the first character is entered Once input has been started you cannot exit from the field until the input has been entered or canceled In numerical fields input initially is normally right justified Digits that have already been entered are moved to the left pocket calculator format Exception Input fields for variables in KM format for instance when calling the PU functions STATUS FORCE VAR are changed to left justified When input begins the old value does not disappear from the display comp
12. which have already been entered Press the ESC key Logout Press the key F3 LI Only data for which no password is necessary password level 0 can now be entered into the control system or modified Press the key Edit Press the key F2 LI This function is available only for password level 9 Passwords and password levels can be modified or entered Confirm your entries by means of the ENTER key Press the F1 key Start up 3 6 SM2 620 3 5 Basic parameters Press the F1 key 3 5 1 Turning the devices on off Select Main menu Acknowledge with the ENTER key or Press the F2 key Dryer on off on turn dryer on off turn dryer off Acknowledge with the ENTER key Timer on off Press the SHIFT key and choose with the arrow keys the desired operation internal operation with timer operation at OP7 see chapter timer external operation with timer if present off operation without timer Acknowledge with the ENTER key LI The timer is only operating when the dryer is switched on STT 500 Press the 4 key LI If the unit operates with a return air cooler optional Return air cooler on off on operation with return air cooler off operation without return air cooler Acknowledge with the ENTER key Press the V key Start up 3 7 SM2 620 Hopper X on off X number of the drying hopper on rele
13. 3 Loosen the nut position 1 Loosen and remove the screw position 2 Slide motor with carrier flange plate position 6 towards the carrier flange housing position 4 Remove defective V belts position 5 put on new ones Attention should be given to exact alignment of the V belt pulleys Adjust belt tension by screw position 2 in accordance with the information sticker Tighten the nuts on threaded bolt position 1 again Mount the protective grid of the blower position 2 Mount the side panels Maintenance 5 9 SM2 620 STT 500 High pressure blowers with frequency converter operation Blowers work without V belts 5 4 Disposing of the drying agent Ensure that drying cells are exchanged by Sterling or refilled only when empty Drying agents must be disposed of in accordance with all official regula tions Used drying agents are to be disposed of as hazardous waste as it may be contaminated with foreign substances from the materials dried in the system Used drying agents or drying cells containing used drying agent cannot be returned to Sterling 5 5 Servicing the accessories The operating instructions must be followed Maintenance 5 10 SM2 620 STT 500 5 6 Changing the battery of the control system This work may be carried through only by qualified personnel trained in the field of electrical engineering The battery may be changed only with the control system
14. 3 Electrical connection Observe the rules of the local electricity board Check that the supply voltage and the power frequency are in accordance with the data on the name plate of the device The electrical connection may only be carried through or assigned by Ster ling service staff or by qualified staff authorized by Sterling Other persons are not permitted to carry through the electrical connection The main switch must be freely accessible Ground the equipment against electrostatic charging Observe that the control system is still under voltage even when the mains switch is switched off Regularly make sure that none of the electrical or screw connections are loose Immediately after connection check the direction of rotation of the blo wers see rotational direction arrow on the blowers The direction of rotation should be switched in the supply line only The operation voltage is 480 3 60 Special operation voltages are possible Assembly instructions 8 3 SM2 620 STT 500 9 Technical Data Basic Equipment Centrally monitored PLC S7 drying control system with operator panel OP 7 Central temperature controls for all heating elements to ensure constant temperature levels Safety temperature limiter for all heaters Designed for optimal regeneration time due to constant monitoring of the moisture level in the drying cells or desiccant beds Maintenance free air valves Automatic alarm clock or t
15. 53 for example proceed as follows Press Press Shift LED is on Press in succession Press Shift LED goes out Press in succession Confirm by pressing OP7 OP17 09 96 02 01GB General Operation Extended charac ter set If the characters available on the keypad are not sufficient for the alphanu meric input you can select additional letters and special characters from the extended character set The extended character set is available for all KC type fields To enter the string 180KT61 for example proceed as follows Step Press in succession Press Shift LED is on Procedure The extended character set is available Scroll with the arrow keys through the extended character set 4 x Select O and using the arrow key move right one position gt The character you selected is applied by moving the cursor Select K and using the arrow key move right one position Select T and using the arrow key move right one position Press Shift LED goes out Press in succession Confirm by pressing b LES L ly Dv gt UP UP I 09 96 02 01GB General Operation 3 3 8 Entering Symbolic Values Text instead of a value OP7 OP17 09 96 When you enter a symbolic value text is displayed instead of the value If a field has to be filled by entering symbolic values take the value from a list of options
16. By means of the arrow keys select the adjustment which suits you best Press the ENTER key LU Depending on the outside temperature the brightness of the screen may vary Language Press the SHIFT key By means of the arrow keys select the desired language if present Press the ENTER key Press the F1 key Start up 3 15 SM2 620 STT 500 3 5 7 Changing parameters Select Parameters Acknowledge with the ENTER key or Press the SHIFT key and the K1 key Run on time drying blower 300 sec Standard setting 300 seconds changes only after contacting Sterling Service Press the 4 key Parameters The values in this menu may only be changed after contacting Sterling Ce Service Press the F1 key Start up 3 16 SM2 620 STT 500 3 5 8 Setting the timer Select Timer Acknowledge with the ENTER key or Press the SHIFT key and the F1 key XX ON 00 00 OFF 00 00 XX day Mo Su Enter for each day the switching on time and the switching off time Acknowledge with the ENTER key LI Example Fr 08 00 OFF 23 59 Sa 00 00 OFF 23 59 Su 20 00 OFF 08 00 Mo 00 00 OFF 00 00 The dryer starts on Friday at 08 00 in the morning runs through without interruption until sunday at 08 00 and switches off At 20 00 the dryer starts again and switches off on Monday at 00 00 Press the F1 key Start up 3 17 SM2 620 STT 500 3 6 Starting continuous operation
17. ED is off Press the K2 key Error and error correction 4 2 SM2 620 Dehumidified Air Dryer View Press the F2 key All alarm messages with their numbers see Texts date time and the supplement K G or Q are displayed LI K coming a failure occured Pressing the gt key displays the alarm message in plain text G going the resent for the failure has gone Q reset the display of the alarm message in the operator device has been erased by pressing the ACK key Press the ESC key Print Optional LI This function is password protected Make sure that a printer is connected and switched on Press the F3 key The alarm messages are printed Press the key Error and error correction 4 3 SM2 620 Dehumidified Air Dryer Number Press the F2 key Total messages The number of all alarm messages is displayed Waiting messages The number of current alarm messages is displayed Press the ESC key Delete Press the F3 key LI This function is password protected Sterling service Press the ENTER key for deleting the messages Press the ESC key Press the V key Error and error correction 4 4 SM2 620 Dehumidified Air Dryer Overflow Press the F2 key LII If there are more current alarm messages than can be saved a warning message residual buffer reached may be given This function is password protected Sterl
18. LE OF CONTENTS 1 General Information shin usns n ox eee ee eke ee RR RC RO RC e RR 1 1 1 1 Warnings and symbols llsiieeeeee n 1 2 1 2 Explanations and information 00 00000 eee ee 1 3 to Legal basls 143 7505 eed tees DER E REESE RR Beak Seas Ree done 1 3 1 4 Fields of applications 2 2 tenia eaaa a e E E 1 3 to Notes OM USAGE uale od sete tees eee eee rS rid 1 3 2 Safety instructions ou cen ee deca m ria 3x Slat wl CA EA a ew dr RD av TR 2 1 2 1 FOr your safety com Rx ee te do tesa a edad ERE EE E TER 2 2 2 2 For the safety of the devices 0 2 ees 2 5 3 Start Up bak orsa or ele rk RU m Rr rx Rr ER ere x rer Rs 3 1 3 1 Control system x deme geb Ri EH EEG eee ded n ace d 3 2 3 1 1 Key assignments 22s ssssccku eio mele geen ates ERR Pad 3 2 3 1 2 IFIOW Chats acer hr Pub xe Rb ee d tede ee Su 3 3 3 2 Switching on the dryer erria rr kraad rint kanra n 3 4 3 2 1 Operation statuses siasa id ai aeaa aiaa oe a a a a aS 3 4 3 3 Viewing the software version l l eh 3 5 2 4 Passwords ix 4 22 24 tees vee Oe ed 63 40 APRES N Peed PARE PR RE 3 5 3 5 Basic parameters cesis e t eden dues X dust Ub Rond i e 3 7 3 5 1 Turning the devices on off 2 0 0 0 ce ee 3 7 3 5 2 Entering dryer values ek peek exe e 3 9 3 5 3 Entering hopper values 00 0c e eee eee 3 11 3 5 4 Observing processing statuS 0 0 2 ee ee 3 13 3
19. SM2 620 Stering Sterling Operating Instructions Dehumidified Air Dryer STT 500 with Siemens S7 control unit Sterling Material Processing Please note that our address and phone information has changed Please reference this page for updated contact information These manuals are obsolete and are provided only for their technical information data and capacities AXCAUTION Portions of these manuals detailing procedures or precautions in the operation inspection maintenance and repair of the products may be inadequate inaccurate and or incomplete and shouldn t be relied upon Please contact the ACS Group for more current information about these manuals and their warnings and precautions Parts and Service Department 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 For immediate assistance please contact North Central and South America 8am 5pm CST 1 800 483 3919 for drying conveying heating and cooling and automation For size reduction 1 800 229 2919
20. Start up 3 3 SM2 620 3 2 Switching on the dryer Switch on the system by means of the main switch STT 500 LI The control system carries through a self test after that the name ofthe dryer and the operation status of the unit are displayed Unblock the control system Keep the ACK key pressed until the LEDs of the keys K1 K4 light up 3 2 1 Operation statuses The following operation statuses can be displayed system is off system is on blower runs on valve block regeneration will be finished in x min Start up 3 4 SM2 620 STT 500 3 3 Viewing the software version Press the key LI The software version will be displayed 3 4 Passwords The entry of a password prevents unauthorised persons from having access to the data entered into the control system Important data can then be entered or modified only after the password has been entered If you make no entries for more than 10 minutes the access is blocked and you have to re enter the password e password level 6 79 21 54 Tell the password only to authorised persons Press the Shift key and the K4 key Press 3 x the V key Press the F3 key Start up 3 5 SM2 620 STT 500 Login Press the key F2 Enter the password Press the ENTER key LU If the password has been entered correctly the corresponding password level is displayed You can now enter data into the control system or modify data
21. air filter Clean the return air filter with compressed air from in aX 7 Nf side to out or renew the filter Never knock the return Md SS au air filter on the floor A Clean the return air filter housing Use lint free clea 5 S ning rags Il U Re install the cleaned new return air filter PH ER w Mount the lid and fasten the securing nut See TT n P XN Close the panel Filter of the electrical cabinet STT 500 Never operate the dryer without return air filter The dryer can t be put into operation if the panel is not replaced LU Order number return air filter if operated with return air cooler ID 88226 without return air cooler ID 86378 Maintenance 5 5 SM2 620 STT 500 Regeneration air filter Loosen the securing nut on lid of the regeneration air filter Remove the lid and regeneration air filter housing Loosen the two wing nuts Remove the circular grid Remove the filter mat Blow through the filter mat with compressed air from the inside to the outside or renew the filter Re install the cleaned new filter Replace the circular grid Fasten the two wing nuts on Replace the regeneration air filter housing and the lid of the regeneration air filter Fasten the securing nut onto the regeneration air filter Close the panel Never operate the dryer without rege
22. air the equipment Spare parts list 10 1 SM2 620 Pos STT 500 N O ID number Description 95828 93795 85276 86371 86363 95828 93795 85275 97762 95819 93687 93686 86398 83991 86378 Tubular heating element 230 V 3 kW drying optional Tubular heating element 230 V 2450 W drying optional Temperature limiter STB 160 250 C 320 482 F drying optional PT 100 3 m Spindle motor 24 V Tubular heating element 230 V 3 kW regeneration Tubular heating element 230 V 2450 W regeneration Temperature limiter STB 360 500 C 680 932 F regeneration Silicon hose Pull button Fine mesh filter with filter mat complete Filter mat for fine mesh filter High pressure blower HRD 1 4 0 75 kW 400 V 50 Hz V belt Filter cartridge if no return air cooler is in use Spare parts list 10 2 SM2 620 Pos 9 10 11 Optional 12 13 14 15 ID number 97762 95819 85266 84157 87491 84494 83991 82519 83023 83022 05190 20952 96196 84156 84157 87491 85682 STT 500 Description Silicon hose Pull button Field switch Filter unit complete Spare filter mat High pressure blower HRD 2 5T 3 3 kW 400 V 50 Hz V belt High pressure blower HRD 2TFU
23. asing drying hopper X off blocking drying hopper X Acknowledge with the ENTER key Hopper heater X on off X number of the hopper heater on switch on hopper heater X off switch off hopper heater X Acknowledge with the ENTER key Press the F1 key STT 500 Start up 3 8 SM2 620 STT 500 3 5 2 Entering dryer values Select Dryer Acknowledge with the ENTER key or Press the F3 key Regeneration Heater Act The regenerated heat temperature will be displayed Used air Act The current temperature of the used air will be displayed Press the V key LU If the unit operates with Dew point dependent regeneration switch op tional Dew point max Enter the maximum permissible worst allowed dew point temperature 35 to 28 C 31 to 82 4 F Acknowledge with the ENTER key Dew point Act The current dew point temperature will be displayed LI If there is a cable break 0 C 32 F is displayed Press the V key Start up 3 9 SM2 620 STT 500 LI If the unit operates with a return air cooler optional Return air cooler Target Enter the max permissible return air temperature 65 C max 149 F Higher temperatures are not allowed Acknowledge with the ENTER key Return air cooler Act The current return air temperature will be displayed LI The cooling effect of the return air cooler is highly dependent on the c
24. ated change over after 3 hours If a malfunction occurs in the drying cycle during the program run regeneration is not interrupted but continues until the program end has been reached This guarantees that 1 regenerated drying cells is always available The air inside the switch cabinet is cooled by a cooling appliance for the protection of temperatu re sensitive components if present optional With the digital timer the dryer can be switched on and off at set times Dew point dependent regeneration switch optional The dew point temperature is monitored continuously The valve system switches to the freshly regenerated drying cells only after the selected dew pointtemperature has been reached The hu mid drying cells are then regenerated Afterthe cooling time the drying cells are ready for operati on again The valve system switches to the freshly regenerated drying cells only after the moistu re content of the drying cells which are in the drying cycle have reached the setpoint value Functional description 6 2 SM2 620 STT 500 6 2 Drying hopper optional The material is dried in the drying hopper The dehumidified air is forced through the material in the hopper collecting moisture in the process The drying hopper must be dimensioned accor ding to its intended use to ensure that the final moisture content is attained When the hopper is fil led for the first time or at the start of a drying procedure the material i
25. capacity Do not stand or work under suspended loads Use suitable workshop equipment Install the equipment such that all parts are easily accessible this facili Ce tates maintenance and repair work Assembly instructions 8 1 SM2 620 Dehumidified Air Dryer 8 1 Mounting of the suction device for regeneration exhaust air When plastics are dried which produce hazardous gases environmentally sound disposal of the regeneration exhaust air must be provided The throughput ofthe regeneration blower may notbe changed It must be taken into consideration when installing a disposal system e g exhaust system that regeneration exhaust air is extremely humid This may result in condensation water which must not enter the dryer again under any circumstances 8 2 Connection of the air coolers A return air cooler is generally required in cases in which the return air cS temperature is over 65 C 149 F The return air cooler can be connected to a coolant circuit or the water mains network Observe the water flow with connection to water mains network The coolant circuit must be di mensioned acccordingly Remove the side panel of the dryer Connect the coolant intake line and coolant return line to the return air cooler Obeserve the flow direction of the coolant through the return air cooler Check the connections for leaks Mount the side panel Assembly instructions 8 2 SM2 620 Dehumidified Air Dryer 8
26. e work appoint a supervisor Inform the responsible personnel before maintenance work on the system is started Never operate the equipment when partially dismantled All maintenace and repair work not described in this chapter may only be carried out by Sterling service personnel or authorized personnel appointed by Sterling A Disconnect the equipment from mains supply before starting maintenan ce procedures to ensure that it cannot be switched on unintentionally Depressurize all compressed air piping of the equipment before starting maintenance work Maintenance 5 1 SM2 620 STT 500 Please observe the maintenance schedule Before starting maintenance work clean the equipment of oil fuel or lu bricants Ensure that materials and incidentals required for operation as well as spare parts are disposed of properly and in an environmentally sound manner Use only original Sterling spare parts Keep record of all maintenance and repair procedures Maintenance 5 2 SM2 620 STT 500 5 1 Maintenance intervals Daily Weekly Monthly Every three months Every six months Check warning signs on equipment for good legibility and completeness Clean return air filter and housing depending on amount of dust collected Lamp test if you press the button longer than 2 seconds all LED s must light up Check function of the main switch Clean filter of the electrical cabinet d
27. ed with the equipment These operating instructions are to be used by all persons assigned activi ties connected with the equipment Knowledge of the English language is prerequisite Ensure in each case that the operating personnel are familiar with the opera ting instructions and the function of the equipment Safety instructions 2 1 SM2 620 Dehumidified Air Dryer 2 1 For your safety General The operating personnel of this equipment must be at least 16 years old Please read these operating instructions carefully before taking into operation for the first time Contact us should questions arise This avoids injury and damage to equipment These operating instructions must be kept available at all times at the place of operation of the equipment Improper operation results in danger of accidents Please note that for reasons of clarity not all conceivable cases regarding operation or mainten ance of the equipment can be covered in these operating instructions Please observe all safety instructions and warnings on the equipment This avoids injury and da mage to equipment All work on the equipment is to be carried out by persons whose qualifications are specified in the pertaining chapters of the operating instructions Improper operation results in danger of acci dents The proper working clothes are to be worn during any work on the equipment This avoids injury The local regulations and requirements pertaining
28. elets and then fasten the transport cables to the eyelets Disassemble the eyelets after set up Transport with a workshop crane Transport Assembly and Storage 7 3 SM2 620 Dehumidified Air Dryer 7 2 Assembly Please ensure adequate carrying capacity of the lifting equipment Check the carrying capacity of the point of installation particularly if installed on a platform The place selected for installation should be as free of vibrations as possible The main switch must be freely accessible Ground the equipment against electrostatic charging A special foundation is not required for installation The dryer must be installed on a level surface and may not be exposed to excessive humidity Maximum permissible ambient temperature of the control system is 45 C 113 F To facilitate servicing install the dryer such that it is accessible from 3 sides Make sure that the air filters can be changed without problems The rear of the dryer can be placed against a wall To conserve energy keep the distances between dryer hopper and processing machine as short as possible The location of the control unit should be chosen so that a clear view of the separators is guaran teed from the control unit Thus any malfunctions which arise can be corrected more easily Fasten the transport cables to the eyelets of the control cabinets During transport do not contact or push against other components wi
29. emperature Measurement Return Air Defective Check cables and sensor Excess Temperature Return Air Check cables and sensor Check the return air cooler Error and error correction 4 7 SM2 620 Dehumidified Air Dryer Temperature Measurement Drying Heater Defective Check cables and sensor Check the power supply Short circuit check Excess Temperature Drying Heater The drying temperature is too high Check the safety temperature limiter Sterling Service Insufficient Temperature Drying Heater The drying temperature is too low Check the drying heater Safety Switch Drying Heater Check the heater Check the fuses Short circuit check of the heater Temperature Measurement Heater Defective Hopper X X number of the drying hopper Check cables and sensor Check the power supply Short circuit check Excess Temperature Heater Hopper X X number of the drying hopper The temperature of the hopper heater is too high Check the safety temperature limiter Sterling Service Insufficient Temperature Heater Hopper X X number of the drying hopper The temperature of the hopper heater is too low Check the hopper heater Safety Switch Heater Hopper X X number of the drying hopper Check the heater Check the fuses Short circuit check of the heater Error and error correction 4 8 SM2 620 Dehumidified Air Dryer Temperature Measurement Granules Defective Hopper X X number of the dry
30. epending on amount of dust collected Check V belt tension of blower Clean filter of the regeneration blower depending on amount of dust collected Exchange return air filter depending on amount of dust collected Exchange filter of the electrical cabinet depending on amount of dust collected Check all electrical and mechanical connections for tight fit Yearly Exchange filter of the regeneration blower depending on amount of dust collected LI This maintenance schedule is calculated for 3 shift operation The given maintenance intervals are average values Check whether in your individual case the maintenance intervals must be shortened Maintenance 5 3 SM2 620 STT 500 5 2 Cleaning renewing the air filters Press the F2 key Select Dryer off Acknowledge with the ENTER key A Wait until the blowers have stopped turning Switch off the dryer at the main switch Disconnect the power supply Open the upper left hand panel seen from the front by means ofthe pro CE vided switch cabinet key LI Clogged filters reduce the volume of circulating air to a substantial de gree and result in decreased dryer efficiency In addition the heating ele ments may be damaged due to clogged filters Maintenance 5 4 SM2 620 STT 500 Return air filter Loosen the securing nuton the return airfilter housing and remove the housing lid Return airfilter Regeneration air filter Remove the return
31. essure Check the blower Vacuum sensor defective The Safety Switch Drying Blower Has Been Actuated Check the blower Check the fuses Short circuit check of the blower Vacuum Drying Blower The drying blower does not produce sufficient pressure Error and error correction 4 6 SM2 620 Dehumidified Air Dryer Check the blower Vacuum sensor defective Temperature Measurement Regeneration Heater Defective Check the cables and the sensor Check the power supply Short circuit check Excess Temperature Regeneration Heater The regeneration temperature is too high Check the safety temperature limiter Sterling Service Insufficient Temperature Regeneration Heater The regeneration temperature is too low Check the regeneration heater The Safety Switch Regeneration Heater Has Been Actuated Check the heater Check the fuses Short circuit check of the heater Error Bypass Flap The bypass flap does not close or closes too slowly Check the bypass flap Error Valve Block The valve block has not reached the proper position The main switch is placed in the off position Check the position ofthe valve block Press the ACK key and put the main switch in the on positi on immediately If the valve block has not reached the correct position within 1 minute the main switch is again placed in the off position Sterling Service Temperature Measurement Outgoing Air Defective Check cables and sensor T
32. f accidents Never open drying hoppers while the device is in operation Danger linjury through burns Open drying hoppers only if they have been cooled down sufficiently Danger Injury through burns Before starting maintenance work wait until the drying cells drying hoppers and air pipings have been cooled down sufficiently Avoid touching any of these parts Danger Injury through burns Remove any granules remaining on the ground Danger of accidents Arrest the wheels after installation if the dryer is mounted on a movable frame This will prevent danger to people and material Safety instructions 2 4 SM2 620 Dehumidified Air Dryer 2 2 For the safety of the devices Never change settings without carefully assessing the consequences Use only original Sterling spare parts Observe the maintenance instructions Keep a record of all maintenance works and repairs Please note that electronic components can be damaged by static discharge Before initial operation and in regular intervals make sure that no electrical connections are loo se Never readjust sensors without exactly knowing their functions Please ensure that the permitted storage temperature lies between 20 and 55 C 4 to 131 F Please ensure that the permitted operation temperature lies between 0 and 45 C 32 to 113 F Check the direction of rotation of the blowers after the electrical connections have been made see rotational direct
33. he direct and indirect hazards connected with the equipment Please observe all safety regulations for the operation of lifting equipment Transport Assembly and Storage 7 1 SM2 620 Dehumidified Air Dryer 7 1 Transport and Packing Please ensure adequate carrying capacity of the lifting equipment Note that the dryer system is top heavy Risc of toppling The equipment pass a rigorous operating test in the factory and are packed carefully to avoid transport damage Please check packing on delivery for transport damage The inlet and discharge flanges are sealed with plugs so that no dirt can enter during transport Plugs must be removed before assembly Packing materials should be disposed of according to environmental laws or reused Only use for transport of the equipment a suitable lifting device e g a fork lift truck or a workshop crane Fasten the transport cables to the eyelets of the control cabinets Transport must be shock proofed and free from vibrations with a fork lift truck Push the forks up to the dryer housing Check that the forks reach completely under the dryer housing Transport with a fork lift truck Transport Assembly and Storage 7 2 SM2 620 Dehumidified Air Dryer with a workshop crane Check if the eyelets are installed on the dryer housing If this condition is met fasten the transport cables to the eyelets If this condition is not met mount the ey
34. imer Optical alarm indication Function control with flow diagram Optional Equipment Dew point display Return air cooler for high processing temperatures Pre air filter Special color Special voltage Printer interface Fuzzy Logic control for automatic air distribution Condensation collection chamber High pressure blowers with frequency converter operation Performance Maximum air drying capacity of 500 m h 17 700 cu ft hr Operates with 400 V 10 3AC 50 Hz voltage 480 3 60 21 5 kW connected load max 36 kW hopper heatings Noise level 83 dB A Weight approx 660 kg 1455 03 Ibs Technical Data 9 1 SM2 620 I i Q 1800 70 97 ya All dimensions are in mm in Subject to alteration 1690 66 54 y STT 500 1030 40 65 _ oto I ta Loo 700 27 66 Technical Data 9 2 SM2 620 Dimension sheet 2000 78 74 Dimensions in mm S pecifications may be subject to alterations 1300 51 28 STT 500 1030 40 65 O Technical Data 9 3 SM2 620 STT 500 10 Spare parts list This spare parts list is intended to be used only by trained personnel Other persons are not permitted to modify or rep
35. ing hopper Check cables and sensor Check the power supply Short circuit check Excess Temperature Granules Hopper X X number of the drying hopper The material temperature is too high Check the heater Check the throttle valve Valve Error Hopper X X number of the drying hopper The throttle valve does not close or closes too slowly Check the throttle valve Press the F1 key Error and error correction 4 9 SM2 620 STT 500 5 Maintenance This chapter is intended for persons with skills in electrical and mechanical areas due to their training experience and received instructions Personnel using the instructions in this chapter must be instructed of the re gulations for the prevention of accidents the operating conditions and safety regulations and their implementation Ensure in each case that the personnel are informed For maintenance work taking place at heights of over approx 6 feet 1829 mm use only ladders or similar equipment and working platforms intended for this purpose At greater heights the proper equipment for protection against falling must be worn Use only suitable lifting gear which is in proper working order and load sus pension devices with sufficient carrying capacity Do not stand or work under suspended loads Ensure that the electric motors switch cabinets are sufficiently protected against moisture Use only suitable workshop equipment Before starting maintenanc
36. ing service Overflow warning On Off Press the SHIFT key By means of the arrow keys select on if a warning message is to be given By means of the arrow keys select off if no warning message is to be given Press the ENTER key If the overflow warning message is given press the ACK key Delete the Y2 alarm messages Press the ESC key Error and error correction 4 5 SM2 620 Dehumidified Air Dryer Text Press the F3 key All possible alarm messages are displayed with their numbers see Viewing For viewing the possible alarm messages press the arrow keys PLC SPS Battery is Empty Replace the SPS battery Main Switch is Off The main switch has been placed in the off position The safety temperature limiter of the drying orthe regeneration heater respectively has been ac tivated The safety temperature limiter of a hopper heater has been activated Error valve block Check the safety temperature limiter Check the position of the valve block A Safety Temperature Limiter has been Activated Check the safety temperature limiter of the drying regeneration or hopper heater respectively Filter Door is Open The side panels to the air filters are open Assemble side panels The Safety Switch Regeneration Blower Has Been Actuated Check the blower Check the fuses Short circuit check of the blower Vacuum Regeneration Blower The regeneration blower does not produce sufficient pr
37. ing system optional The dryer operates most effectively in conjunction with a pneumatic conveying system This com bination of dryer and conveying system ensures that sufficient material is always fed into the dry ing hopper Only the amount of material required for the processing machines used is removed from the hop per This guarantees that the final drying result remains constant Sterling drying hoppers are available equipped with the corresponding flange for connection of a Sterling pneumatic conveyor directly ex works Suction boxes can also be delivered with the required number of suction tubes These suction bo xes were developed specially for this hopper to prevent dust and foreign particles from being aspi rated into the system A device for connection to the dehumidified air supply line is also available Please note that the function of this combination is different from that of the conventional Sterling suction boxes Functional description 6 5 SM2 620 Dehumidified Air Dryer 7 Transport Assembly and Storage This chapter is intended for all operating personnel of the equipment Personnel using these instructions must be instructed in the regulations for the prevention of accidents the operating conditions and safety regulations and their implementation Ensure in each case thatthe operating personnel are sufficiently informed Please inform all persons within the range of action of the equipment of t
38. ion arrow Clean the drying hoppers before the first filling Note the instructions of the material manufacturer for the maximum drying temperature Note the drying instructions of the material manufacturer Take care that the drying hoppers are always completely filled and that the retention period is re spected if continual removal is taking place Note that too large amounts taken from the drying hopper lead to insufficient drying of the materi al Close the air stop valves of drying hoppers which are empty or have not been used Note down all data which you have entered into the control system The password is to be entrusted to authorised personnel only Please note that the temperature of the dryer heating system must always be set lower than that of the supplementary heaters When you dispose of drying agents observe all official rules Note that drying cells are replaced or refilled by Sterling only if they are empty The material level may not fall below 40 in the drying hopper when material is continuously re moved from the drying hopper but no material is continuously fed into the drying hopper batch drying Close the throttle valves Read the operating manuals of the connected devices Safety instructions 2 5 SM2 620 3 Start up STT 500 This chapter is directed at the operators of the equipment This chapter assumes general skills in dealing with drying systems and SPS PLC control units
39. letely but its bit pattern 1s overwritten one character at a time You move the cursor in this type of field by mt with activated Shift Lock mode You can configure limit values for numerical input fields In this type of field a limit value check takes place i e the entered values are applied only if they lie within the configured limits If a value outside these limits is en tered a system message is displayed and after it has been canceled the old value is restored in the field If a numerical field has been configured with a certain number of decimal places and too many have been entered they are ignored if too few have been entered the field is padded with zeroes OP7 OP17 09 96 02 01GB General Operation 3 3 2 Entering Alphanumeric Values Mixed input of With the input of alphanumeric values digits and letters are mixed igits and letter E digue an federe For the numerical components of the input proceed as described in section 3 3 1 If however you wish to enter a letter at the current cursor position you must enable the corresponding alphanumeric font In this instance you move the cursor with activated Shift Lock mode with and gt Entering A to F A to F characters can be entered directly with activated Shift Lock mode characters using numeric keys 1 to 6 If you want to enter digits again after the letters Shift Lock mode must be de activated To enter the alphanumeric string 7FEB
40. list in the electrical manual Spare parts list 10 5 SM2 620 Dehumidified Air Dryer 11 Electrical manual This electrical manual is intended to be used only by Sterling service personnel and trained personnel authorized by Sterling Other persons are not permitted to modify or repair the equipment Connection diagram no Currently not available will be delivered at a later date Electrical manual 11 1 SM2 620 Dehumidified Air Dryer 12 Accessories Version 64 10 0134GB01 10 97 Entering values on the OP 7 17 Flap control with Fuzzy Logic Elektror High pressure blower with frequency converter operation Elektror High pressure blower L1 L1 L1 L1 L1 L1 Accessories 12 1 02 01GB Accessories Entering values on the OP 7 17 Sterling Material Processing 02 01GB General Operation 3 3 Entering Values General procedure OP7 OP17 09 96 In input fields values can be entered on the OP and transferred to the PLC To do this proceed as follows Step Procedure 1 Branch initially to the screen you require and then to the corresponding screen entry 2 Using the arrow keys select the input field you require within the screen entry Then enter your value Depending on how the field has been con figured values may be input as inputs of numerical values refer to section 3 3 1 inputs of alphanumeric values refer to section 3 3 2 inputs of symbolic
41. material temperature in the drying hopper X is displayed in C F optional if there is a flap Press the F1 key Start up 3 12 SM2 620 STT 500 3 5 4 Observing processing status Select Status Acknowledge with the ENTER key or Press the K1 key LI The current operation status of individual assembly parts is displayed e g valve block moved in moved out error moved in The upper drying cells are within the drying circuit the lower ones are regenerated moved out The upper drying cells are regenerated the lower ones are within the drying circuit error An error has occurred Other operation statuses on in operation off out of operation open opened shut closed Press the F1 key Start up 3 13 SM2 620 STT 500 3 5 5 Setting date and time LU This function is password protected Press the K3 key Enter the password if requested Date Press the SHIFT key By means of the arrow keys select the desired week day By means of the arrow keys select the shown date Press the SHIFT key Enter the desired date Press the ENTER key Time Enter the desired time Press the ENTER key Press the F1 key Start up 3 14 SM2 620 STT 500 3 5 6 Viewing changing language and contrast LI This function is password protected Press the K4 key Enter the password if requested Contrast Press the SHIFT key
42. n the hopper must be dried completely before material can be removed from the hopper for the first time When material is continuously removed from the hopper material must also be continuously fed into the drying hopper The new moist material is fed into the drying hopper from the top and slowly moves downward toward the material suction box As the material moves upward it is dried until its final moisture content is attained To ensure proper continuous drying we recommend that the drying hopper always is kept com pletely filled Automatic conveyors such as the models included in our delivery program optimize the automation of the material flow When material is continuously removed from the hopper but no material ce is continuously fed into the drying hopper batch drying the material le vel may not fall below 40 Close the throttle valves Functional description 6 3 SM2 620 STT 500 6 3 Return air cooler A return air cooler is generally required in cases in which the return air CE temperature is over 65 C 149 F A return air cooler improves the efficiency of the drying cells The return air cooler reduces the return air temperature to a defined value The return air temperature is set at the operation panel LU The lower the value chosen for the return air temperature the better the efficiency of the drying cells The dryer is automatically switched off if temperature exceeds 80 C 176 F
43. neration air filter The dryer can t be put into operation if the panel is not replaced LI Order number filter mat ID 93686 Maintenance 5 6 SM2 620 STT 500 Filter of the electrical cabinet Remove the lid of the filter Remove the filter mat Blow through the filter mat with compressed air from inside to outside or renew the filter mat Clean the filter housing Use lint free cleaning rags Re install the cleaned new filter mat Replace the lid of the filter Never operate the dryer without filter mat LU Order number filter mat ID 87491 Maintenance 5 7 SM2 620 STT 500 5 3 Tensioning the V belts Press the F2 key blower regeneration heater Select Dryer off Acknowledge with the ENTER key Bs J AND ud J AA i wr A Wait until the blowers have stopped turning P T nd ll oU Switch off the dryer at the main switch Ea WA Disconnect the power supply X Ils blower drying heater STT 500 Open the upper left hand panel seen from the front by means ofthe pro Ce vided switch cabinet key LI Order number V belts blower regeneration heater ID 83991 blower drying heater ID 83991 Maintenance 5 8 SM2 620 STT 500 Blower regeneration heater Blower drying heater Remove the protective grid of the blower position
44. nge Chakan Tal Khed Suite 588 Suzhou China 215126 Dist Pune 410501 India Schaumburg IL 60173 Phone 86 8717 1919 Phone 91 21 35329112 Phone 1 847 273 7700 Fax 86 512 8717 1916 Fax 91 20 40147576 Fax 1 847 273 7804 i Europe Middle East Africa ACS New Berlin Manufacturing Facility 2900 S 160 Street ACS Warsaw New Berlin WI 53151 Ul Dzialkowa 115 Phone 1 262 641 8600 eee kuxts 0060 CALDBES Phone 48 22 390 9720 Fax 48 22 390 9724 SM2 620 Sterling Material Processing 5200 West Cinton Ave Milwaukee WI 53223 Telephone 414 354 0970 Fax 414 354 6421 www sterlco com Technical service Service department Telephone 800 423 3183 Edition 04 02 Order confirmation number STT 500 Please fill in personally Serial number These operating instructions are for Built in Date of delivery Number of delivery Date of commissioning Location Group of machines SM2 620 STT 500 Sterling Material Processing retains all rights to change the information in these operating instructions at any time without notice We assume no liability for any errors or direct or indirect damage resulting in con text with these operating instructions Copying translation or publication in any form except for personal use of pur chaser requires approval from Sterling Material Processing All rights reserved SM2 620 STT 500 TAB
45. nsport Assembly and Storage 0 0 c cece eee 7 1 7 1 Transport and Packing aasan 0 rnae r ERA nee 7 2 1 2 Assembly tad side wa ited ew das ddd peda deeds dod Ren db eddie 7 4 pcc Cc 7 4 8 Assembly instructions asus kk beak ae ik RR od awa A TR hw aie 8 1 8 1 Mounting of the suction device for regeneration exhaust air 8 2 8 2 Connection of the air coolers 2 00 eee 8 2 8 3 Electrical connection 2 004 cence dav edd peda eee eda deen ed en ddd eda 8 3 9 Technical Data i i steak xx se ec wm Se a wee a a a aa eR ORC RR 9 1 10 Spare parts list seindak sos ax Ry Roe Rok aras eaa OS C ee OR ci RC a eS 10 1 10 1 Switching Cabinet and Operating Unit 0 0 0 eee ee eee 10 5 SM2 620 STT 500 11 Electrical manual eeeee RR RR RR tnn 11 1 Connection diagram no O Currently not available will be delivered at a later date 12 Accessories l lllllleleleeeee eee n nnn 12 1 O Entering values on the OP 7 17 Flap control with Fuzzy Logic Elektror High pressure blower with frequency converter operation L1 L1 CO Elektror High pressure blower L1 L1 SM2 620 Dehumidified Air Dryer 1 General Information These operating instructions are addressed to all users of the device These operating instructions must be used by every person charged with work on the unit General Information 1 1 SM2 620 Dehumidified Air Dr
46. onnel of what is to be done e Operating instructions The operating instructions describe the interaction of the equipment production sequences or methods The operating instructions must be compiled by the operator of the equipment e Equipment foreman When several operating personnel work on one machine the equipment foreman coordinates the sequences The equipment foreman must be appointed by the operator e Trained personnel Trained personnel are persons who due to their training are authorized to carry outthe required work 1 3 Legal basis See Manufacturer s Certificate resp Certificate of Conformity 1 4 Fields of applications For the drying of thermoplastic granules and regrind before processing in order to remove all re maining moisture from the granules both inside and out independent of climate or ambient air conditions 1 5 Notes on Usage e Experienced operators can begin directly with the chapter on Start up if the unit has been pro perly installed e lIftheunithas not been installed yet observe the instructions in the chapter on Assembly Instruc tions and Transport Assembly and Storage General Information 1 3 SM2 620 Dehumidified Air Dryer 2 Safety instructions These safety instructions apply to all persons within the range of action of the equipment Please inform all persons within the range of action of the equipment of the direct and indirect hazards connect
47. oo ler circuit The lower the value chosen for the return air temperature the better the efficiency of the drying cells Plan the size of the coolant circuit accordingly Press the F1 key Start up 3 10 SM2 620 STT 500 3 5 3 Entering hopper values Select Hopper Acknowledge with the ENTER key or Press the F4 key Hopper entry X Target X number of the drying hopper Enter the drying temperature for hopper flap X when operating with supplementary heating Acknowledge with the ENTER key Hopper entry X Act X number of the drying hopper The current temperature at the feed opening of hopper flap X will be displayed LI If there is a cable break 0 C 32 F is displayed The lowest drying temperature setting of the hopper flap must be the ce same as or higher than the drying temperature Press the 4 key Start up 3 11 SM2 620 STT 500 LI If the unit operates with motor flaps optional Granules X target _ C F X number of the drying hopper Enter the material temperature at which the flap optional on the drying hopper X should close Confirm with the ENTER key LI This value is entered in percent of the temperature on the hopper inlet The material temperature calculated by the control system for closing the flap on the drying hopper X is displayed in C F Granules X act C X number of the drying hopper The current
48. ou want to work on several submenu items in succession you can select the individual items directly by means of the arrow keys 3 1 1 Key assignment F1 key Leads to the table of contents ENTER key Confirms the entries ESC key Goes back one step in the menu ACK key Activates an alarm message to unblock the control system Arrow keys Move the cursor bar switch the appliances on or off in combination with the SHIFT key for scrolling forward or backward in a menu SHIFT key Switches on the secondary functions of the keys when the SHIFT key has been pushed the LED SHIFT is on HELP key Viewing additional texts when additional texts can be viewed the LED HELP is on LED ALARM A failure is given by flashing of the LED alarm If the alarm message is acknowledged by pressing of the ACK key but the failure is not yet eliminated the flashing changes to steady light When there is no failure the LED is off LI LED light emitting diode An additional alarm device horn or lamp can be connected optional Start up 3 2 SM2 620 3 1 2 Flow chart Indicator lamp Valve system Drying chamber Drying blower Return air filter Drying hopper Drying heater Regeneration heater Regeneration blower 0 Regeneration air filter OANDOAARWDND Indicator lamp messages Green continous light in process Red continous light alarm STT 500
49. switched on Open the control box by means of the control box key which is part of the supply Open the front door of the CPU Pull the backup battery with cable out of the compartment Plug the connector of the new backup battery into the corresponding socket in the battery compartment of the CPU LI The notch on the battery connector must point to the left Place the backup battery into the battery compartment on the CPU Close the front door of the CPU Close the control box Maintenance 5 11 SM2 620 T Se STT 500 Store backup batteries in a dry and cool place Backup batteries can be stored for approx 5 years If backup batteries are not treated properly they can ignite explode and cause severe burning Order number battery ID 83809 Batteries must be disposed of in keeping with the relevant national envi ronment protection regulations guidelines Maintenance 5 12 SM2 620 STT 500 5 6 1 Resetting the control values This electrical work is intended to be carried outonly by trained personnel LI After changing the battery or the PLC the control values should be reset ted All control values are set back to the standard settings Open the control box with the switch box key which is part of the supply Turn the key to the STOP position Turn the key to the MRES position Hold the key in this position until the STOP LED comes on for the second time and remains on
50. th the control panels 7 3 Storage The control system may only be stored at temperatures from 25 to 55 C 13 to 131 F Between delivery and machine commissioning the equipment should be stored in a dry dust free and vibration free room Transport Assembly and Storage 7 4 SM2 620 Dehumidified Air Dryer 8 Assembly instructions These installation instructions are intended for persons with skills in electri cal and mechanical areas due to their training experience and received in structions Personnel using these installation instructions must be instructed in the reg ulations for the prevention of accidents the operating conditions and safety regulations and their implementation Ensure in each case that the personnel are informed The installation instructions provided in the corresponding operating instruc tions apply for all connected equipment Observe safety regulations with regard to lifting gear handling All installation work must be carried out with the equipment disconnected from electrical power and compressed air supply A For installation work taking place at heights of over approx 6 feet 1829 mm use only ladders or similar equipment and working platforms inten ded for this purpose At greater heights the proper equipment for protec tion against falling must be worn Use only suitable lifting gear which is in proper working order and load suspension devices with sufficient carrying
51. this takes 3 seconds Turn the key to the STOP position Within 3 seconds you must turn the switch back to the MRES position Hold the key until the STOP LED flashes LI When the CPU has completed the reset the STOP LED stops flashing and remains lit Close the control box STOP LED an O l l si aus re i t j 3s i D max 3s i min 3s ee xl Ld d P D STOP c stop P STOP STOP AP stop MRES MRES MRES MRES MRES T 2 3 o Maintenance 5 13 SM2 620 STT 500 6 Functional description This functional description is intended for all operating personnel of the equipment Prerequisite for this functional description is general knowledge of dryers and SPS PLC systems Ensure in each case thatthe operating personnel are sufficiently informed Functional description 6 1 SM2 620 STT 500 6 1 Dryer The dryer operates with dehumidified air i e the air is not only heated but also dehumidified befo re flowing into the drying hopper This principle allows plastic granules to be dried to a residual moisture content as low as 0 002 PET granulate The dryer operates continuously i e dehumidified and if necessary heated air is produced con tinuously The dryer is designed for continuous operation The dryer operates with 2 drying cells one of these cells is always in the drying cycle while the ot her is being regener
52. with frequency converter operation Frequency converter Operating unit Valve stem complete Drying cell complete Drying agent Fan Filter unit complete Spare filter mat Micro switch Spare parts list 10 3 SM2 620 I2 e HN F 16 L Pos ID number Description 16 83986 Moisture sensor STT 500 Spare parts list 10 4 SM2 620 STT 500 Accessories 85241 86371 89846 93303 86387 83015 Digital timer extern optional Multiplier Pt 100 3 m 9 84 ft Multiplier Pt 100 6 m 19 79 ft Multiplier Pt 100 9 m 29 53 ft Multiplier Pt PT 100 12 m 39 47 ft Multiplier Pt 100 15 m 49 21 ft Return air coler optional 29788 87099 84503 88226 Return air coler Solenoid valve 24 V Temperature converter Filter cartridge temperature proof if a return air cooler is in use Flaps optional 16522 16517 86376 18232 84492 Motor flap NW150 complete Motor flap NW80 complete Motor operator 24 V AD DC 50 60 Hz Air control flap Thermometer Hopper heaters optional 85343 85338 85363 85651 85652 Radiator 1 5 kW Radiator 3 kW Radiator 6 kW Radiator 9 kW STB Hopper heaters 10 1 Switching Cabinet and Operating Unit LO Observe spare parts
53. yer 1 1 Warnings and symbols The following warnings and symbols are used in these operating instructions This symbol indicates danger to life Fatal or serious injury is possible if the corresponding instructions regulations or warnings are not observed A This symbol indicates that serious injury is possible if the corresponding instructions regulations or warnings are not observed This symbol indicates that extensive damage to equipment is possible if CE the corresponding instructions regulations or warnings are not obser ved LU This symbol indicates information important for becoming familiar with the equipment i e technical correlations GY This symbol indicates that a technical term is explained at this point General Information 1 2 SM2 620 Dehumidified Air Dryer 1 2 Explanations and information Various terms and designations are used in these operating instructions to ensure clarity There fore please note thatthe terms used in the text stand for the corresponding explanations listed be low e Equipment Equipment can mean an individual unit a machine or an installation e Operating personnel The operating personnel are persons operating the equipment on their own responsibility or ac cording to instructions e Operator The operator of the equipment production manager foreman etc is the person responsible for all production sequences The operator instructs the operating pers
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