Operation Instructions Dehumidified air dryer STT40 STT70 Sterling Material Processing
STT40 / STT70 Sterling Material Processing 5200 West Clinton Ave. Milwaukee, WI 53223 Telephone: (414) 354-0970 Fax: (414) 354-6421 www.sterlco.
STT40 / STT70 Sterling Material Processing retains all rights to change the information in these operation instructions at any time without notice. We assume no liability for any errors from direct or indirect damage resulting in context with these operation instructions. Copying, translation or publication in any form except for personal use by the purchaser requires approval from Sterling Material Processing. All rights reserved.
STT40 / STT70 Table of contents 1. General Information................................................................................................. 1-1 1.1. Warnings and symbols.......................................................................................... 1-1 1.2. Explanations and information ............................................................................... 1-3 1.3. Legal basis ...................................................................................................
STT40 / STT70 8.2. Grounding the equipment against electrostatic charging...................................... 8-2 8.3. Electrical Connection............................................................................................ 8-3 8.4. Connection of Return Air Cooler (Optional) ........................................................ 8-4 9. Troubleshooting ....................................................................................................... 9-1 9.1. Introduction....................
STT40 / STT70 1. General Information These operation instructions are addressed to all users of this device. These operation instructions must be followed by every person working on or with the unit. 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.
STT40 / STT70 When disposing of drying agents / batteries / oil, observe all official rules. Caution: High noise pollution ! For anyone working on the equipment, hearing protection should be worn. Avoid impairment of hearing! Caution: Danger of being crushed ! Disconnect the equipment from the main power supply before starting maintenance procedures. All compressed air pipes on the equipment should be depressurized before starting maintenance work.
STT40 / STT70 1.2. Explanations and information Various terms and designations are used in these operating instructions to ensure clarity. Therefore please note that the terms used in the text stand for the corresponding explanations listed below. • Equipment: ”Equipment” can mean an individual unit, a machine or an installation. • Operating personnel: The ”operating personnel” are persons operating the equipment under their own responsibility or according to instructions.
STT40 / STT70 2. Safety instructions These safety instructions apply to all persons around the operating equipment. Please inform all persons around the operating equipment of the direct and indirect hazards connected with it. These operation instructions are to be used by all persons assigned activities connected with the equipment. Knowledge of the English language is a prerequisite.
STT40 / STT70 2.1 General The operating personnel of this equipment must be at least 16 years old. Please read these operation instructions carefully before operating the equipment for the first time. Contact us should questions arise. This avoids injury and damage to equipment! These operation instructions must be kept available at all times at the place where the equipment is operating.
STT40 / STT70 2.1.1. Assembly Compare the connected loads with those of the main power supply. Danger, electrical shock hazard! 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.
STT40 / STT70 2.1.3. Maintenance Before starting maintenance work, appoint a supervisor. Inform personnel responsible for the system before beginning maintenance work. Caution: Danger of accidents! Disconnect the equipment from main power supply before starting maintenance procedures to ensure that it cannot be switched on unintentionally. Caution: Danger of accidents! All pipes, hoses and connections should be checked regularly for leaks and damage. Any faults which arise should be corrected immediately.
STT40 / STT70 2.2. For the safety of the device Never change settings without carefully assessing the consequences. Use only original Sterling spare parts. Observe the maintenance instructions. Keep a record of all maintenance work and repairs. Please note that electronic components can be damaged by static discharge. Before initial operation and at regular intervals, make sure that no electrical connections are loose. Never readjust sensors without exactly knowing their functions.
STT40 / STT70 3. Start up This chapter is addressed to the operators of the machine. It assumes the operator has general skills with drying equipment and that the functional description has been read and understood. Ensure that the operators have the required experience. ) Make sure that the main switch is set to the “0" position. Check the drying hopper for cleanliness. Check to see whether the adhesive film on the drying hopper has been removed.
STT40 / STT70 3.1. Initial Operation Check whether the inlet of the drying hopper is closed by a lid or whether a conveyor unit (optional) is installed. If not, manufacture a suitable lid and install it on the inlet of the drying hopper or install the optional conveyor unit. ) Attachments which are not supplied by Sterling must be manufactured according to the European Standard 294 safety regulation.
STT40 / STT70 Turn the “Hopper” release switches (ST1, ST2) to the “I” position. To set the drying temperature, turn the temperature controller to 176° F (+80 °C). Press the “PGM” key one time. Set the drying temperature to 176° F using the arrow keys. After 2 seconds, the display will flash and the value will be stored. Press the “EXIT” key (the setpoint value and the actual value of the drying temperature are displayed). After 2 hours, turn the “Hopper” release switches (ST1, ST2) to the “0” position.
STT40 / STT70 3.2. Continuous Operation Note: To see a quick start guide for operation of this dryer see chapter 14. ) Fill at least half of the drying hopper with material. 3.2.1. Switching the Dryer on Turn on the dryers’ main power switch to the on position. The “run” signal lamp turns on. For operation with the optional timer clock: Turn the “Timer” switch to the position. For operation without timer clock: Turn the “Timer” switch to the position. The blower is running at this point.
STT40 / STT70 3.2.2. Setting the Drying Temperature Turn the “Hopper” (ST1, ST2) release switches to the “I” position. For each drying hopper, set the required process drying temperature by using the corresponding temperature controller. Check whether the set process drying temperature is appropriate for the materials which have been placed in the drying hopper. Observe the instructions of the material manufacturer.
STT40 / STT70 Autotuning the temperature controller Press the “EXIT” key for at least 2 seconds. “tunE” flashes. Autotuning can take several minutes. If “tunE” stops flashing, Autotuning is finished. Press the “EXIT” key.
STT40 / STT70 3.3. Switching the Dryer off Turn the “Timer” switch to the / position: Wait until the blower has stopped. The blower will continue running for 10 minutes once the dryer is turned off. If there is a return air cooler installed, switch off its coolant circuit. Turn off the dryer’s main power switch. The “power” signal lamp turns off. Note: For more detailed instructions on the shutting down of this dryer, see the quick start guide in Chapter 14.
STT40 / STT70 4. Error and error correction This chapter is directed at the operators of the equipment. It assumes the operator has general skills in dealing with drying systems and that the “start-up” description has been read and understood. Ensure in each and every case that the operators have the relevant skills in operating this equipment. ) Faults must be eliminated before the control system can start operating again. An alarm is indicated by the steady light of the “trouble” signal lamp.
STT40 / STT70 The following errors can cause an alarm: Blower The blower pressure is too low. Check the blower. Vacuum sensor is defective. Regeneration heater 1 The safety temperature limiter on regeneration heater 1 has been activated. Check the safety temperature limiter. Call the Sterling Service Department. Regeneration heater 2 The safety temperature limiter on regeneration heater 2 has been activated. Check the safety temperature limiter. Call the Sterling Service Department.
STT40 / STT70 5. Maintenance This chapter is intended for persons having skills in electrical and mechanical areas due to their training, experience and supporting documentation. Personnel using the instructions in this chapter must be familiar with accident prevention regulations, operating conditions, safety regulations and their implementation. Ensure in each case that the personnel are informed. For maintenance work taking place at heights of over 6ft.
STT40 / STT70 ) Please observe the maintenance schedule. Before starting maintenance work, clean the equipment of oil, fuel or lubricant. Ensure that materials and incidentals as well as spare parts required for operation are disposed of properly and in an environmentally sound manner. Use only original Sterling spare parts. Keep records of all maintenance and repair procedures.
STT40 / STT70 5.1. Maintenance schedule The checklist below contains a list of items which should be inspected and/or replaced to keep your Dehumidifying Dryer operating at peak efficiency. Perform each inspection at the regular intervals listed below. System model # Every week Date/ By Serial # Date/ By Date/ By Date/ By Date/ By Date/ By Date/ By Date/ By Date/ By Date/ By Date/ By Date/ By Date/ By Inspect all filters for wear, replace/ clean if dirty or worn.
STT40 / STT70 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. 5.2.1. Servicing Process Air Filters Caution! Operating the dryer without the process air filter installed voids your warranty! Dehumidifying dryers have a single cartridge canister-type filter in the process air loop.
STT40 / STT70 5.2.2. Cleaning or Replacing the Return Air Filter STT40 / STT70 • Detach the screw on the housing of the return air filter and remove the housing cover. • Remove the nut of the filter cartridge. • Remove the filter cartridge. • Clean the inside of the return air filter housing. Use non-fibrous cleaning cloths or an industrial type vacuum cleaner. • Vacuuming - Try vacuum-cleaning a soiled filter first.
STT40 / STT70 5.2.3. 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: • Air temperature and flow passing over the sensor. • The amount of fines (dust) in the process air. • The amount of plasticizer vapor in the process air.
STT40 / STT70 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. 5.3.1.
STT40 / STT70 5.3.2. Replacing Worn Desiccant • 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. 2. Remove dryer side panels. 3. Remove any internal hoses that may be in the way. 4. Use nut driver to remove clamps at top and bottom of the desiccant tank. 5. Remove the Desiccant Cell leaving valve and Y-pipe attached to the dryer. 6.
STT40 / STT70 12. Replace any internal hoses that were removed to change desiccant. Figure 3: Required Desiccant Amounts Dryer model STT 40 STT 70 8 x 12 bead Total Part no. lbs. 13.23 W00018051 28.76 Kg 6 13 5.4. Disposing of Drying Agents Please note that drying cells are replaced or refilled by Sterling only if they are empty. When disposing of drying agents, observe all official rules. Since used drying agents may contain impurities from the dried materials, treat them as special waste.
STT40 / STT70 5.5. Replacing the Process Heater The dehumidifying dryers utilize a thru-phase Calrod-type heater element. This heater element is mounted to the inlet of the drying hopper. Although the replacement procedure is the same for each heater, the wattage varies by model, voltage, temperature range, etc. • Hazardous electrical current present.
STT40 / STT70 7. Re-clamp process heater assembly onto the drying hopper. 8. Reattach wiring according to the sketch that was made previously. 9. Replace the air hose to the process heater. 10. Replace access cover on junction box of process heater assembly. 5.5.1. Replacing/Cleaning the Cooling Coils • Hazardous electrical current present. Disconnect and lock out power before you replace cooling coil! Figure 5: Cooling Coil Location and Disassembly Cooling Coil Location 1.
STT40 / STT70 5.5.2. Replacing the regeneration heating coil • Hazardous electrical current present. Disconnect and lock out power before you replace heating element! Figure 6: Heating Coil Location and Disassembly Heating Coil 1. In order to gain access to the heating element, the cover plate on the side of the dryer must be removed. 2. Remove the desiccant tank which has the faulty heater element from the dryer. 3.
STT40 / STT70 5.6. Cleaning the Drying Hopper Set the “Timer” release switch to the / position. Wait until the blower has stopped. The blower will continue running for 10 minutes once the dryer is turned off. If there is a return air cooler installed, switch off the coolant circuit. / Switch off the dryer’s main power switch (the “power” signal lamp turns off). Interrupt the main power supply so that the device cannot be turned on unintentionally.
STT40 / STT70 STT 25 Open the toggle-type fasteners (A) at the hopper lid and fold the hopper lid upwards (if in use: remove before the single conveyor). Clean the drying hopper. Close the hopper lid and close the toggle-type fasteners (A) (if in use: re-mount the single conveyor). ) A Figure 7: STT 25 When cleaning, remove any granules remaining in the hopper lid.
STT40 / STT70 6. Functional description This functional description is addressed to the operators of the equipment. This functional description assumes the operator has a general familiarity with drying equipment. Verify that the operators have the appropriate skills.
STT40 / STT70 6.1. General Information The dehumidified air dryers were developed for drying plastic granules. Due to their compact construction, they can be utilized for drying next to the processing machine (drying hopper on the processing machine) or with one or more drying hoppers as a movable facility (compact facility). The dryers work according to the dehumidified air principle, i.e., the air is not only heated but also dehumidified before it flows through the drying hopper.
STT40 / STT70 Figure 9: Functional diagram of STT40 / STT70 All functions are fully automatic. The dryer is equipped with two drying cells. One drying cell is part of the drying cycle; the other drying cell is regenerated simultaneously. Part of the dehumidified air is used for regenerating the moist drying cell. At the beginning of regeneration, it is heated by the regeneration heater. After the end of the heating period, the drying cell is cooled off by using dehumidified air.
STT40 / STT70 A digital display of the current dew point temperature can be supplied as additional equipment. An optional timer clock can also be supplied which switches the dryer on or off at preselected times. ) Read the timer clock operating manual.
STT40 / STT70 6.2. Drying Hopper (Optional) The material is dried in the drying hopper. The dehumidified air is heated and then conducted through the material in the drying hopper and removes moisture. Drying hoppers must have the appropriate dimensions for their specific use so that the desired final moisture content is reached. When refilling a drying hopper, the material must be dried completely before material can be taken out for the first time.
STT40 / STT70 6.2.1. Hopper Heater Each drying hopper has its own heater. The temperature of the dehumidified air is adjusted by means of the temperature controller. The setting range is from +140°- +356°F (+60 - +180 °C). The current temperature can be read off the digital display (= actual value). If you are drying at a process temperature above 250°F you must use a return air cooler. ) The temperature controller is factory-programmed.
STT40 / STT70 DEFAULT SETTINGS FOR JUMO TEMP. CONTROLLER Model number: dTRON 16.1 B 70.3011 Contact information: Germany MoltkestraBe 13-31 36035 Fulda, Germany Ph: +49 661 60 03-7 27 Fax: +49 661 60 03-5 08 E-mail: mail@jumo.net Internet: www.jumo.net USA 885 Fox Chase, Suite 103 Coatesville, PA 19320, USA Ph: 610-380-8002 or 1-800-554-JUMO Fax: 610-380-8009 Email: info@JumoUSA.com Internet: www.JumoUSA.com PARAMETERS THAT ARE CHANGED IN TESTING AREA CELSIUS FAHRENHEIT FACTORY DEF.
STT40 / STT70 6.3. Connection to a Pneumatic Conveying System (Optional) Your dryer works best in combination with a pneumatic conveying system. When assembled this way, your drying hopper will always be supplied with sufficient material. The dryer will only take as much material as is required by the processing machines. Therefore, the drying result will remain consistent. Sterling drying hoppers are equipped with a suitable flange for adding a Sterling pneumatic conveyor.
STT40 / STT70 7. Transporting, Assembly and Storage This chapter is intended for all operating personnel of the equipment. Personnel using these instructions must be knowledgable in the regulations for the prevention of accidents, the operating conditions, safety regulations and their implementation. Ensure that the operating personnel are sufficiently informed. Please inform all persons around the operating equipment of the direct and indirect hazards connected with it.
STT40 / STT70 7.1. Transporting and Packing Please ensure that the lifting equipment has an adequate carrying capacity. Note that the dryer system is top-heavy. Risk of toppling! ) The machine must not be tilted or laid on its side. The equipment has undergone a rigorous operating test in the factory and is packed carefully to avoid transport damage. Please check packing materials upon delivery for transport damage.
STT40 / STT70 7.2. Assembly Please ensure the lifting equipment has an adequate carrying capacity. Check the load capacity where the dryer is to be installed, particularly if it is to be installed on a platform. The place selected for installation should be as vibration-free as possible. The main power switch must be accessible. Ground the equipment against electrostatic charging. ) The machine must not be tilted or laid on its side.
STT40 / STT70 8. Assembly instructions These installation instructions are intended for persons with skills in electrical and mechanical areas due to their training, experience and supporting documentation. Personnel using these installation instructions must be knowledgeable in the regulations for the prevention of accidents, operating conditions, safety regulations and their implementation. Ensure in each case that the personnel are informed.
STT40 / STT70 8.1. Installation of the exhaust fan for regeneration of exhaust air When plastics are being dried that release harmful gases during the drying process, care must be taken that the regeneration exhaust air is disposed of in an environmentally sound way. At the same time the throughput of the regeneration blower must not be altered. It should be noted when assembling a disposal system (e.g. an exhaust system) that the regeneration exhaust air is very humid.
STT40 / STT70 8.3. Electrical Connection The electrical connection of the dryer and the hopper heaters may only be done by Sterling service staff or by qualified staff authorized by Sterling. Other persons are not permitted to perform any electrical connection. Observe the rules of the state and local electricity board. The main power switch must be freely accessible. Ground the equipment against electrostatic charging.
STT40 / STT70 8.4. Connection of Return Air Cooler (Optional) ) A return air cooler must be used if the return air temperature is higher than 149°F (+65 °C). You can connect the return air cooler to a coolant circuit or to the water main network. The water flow rate in the water main network* is for: STT40 approx. 7.16 ft3 (0.2 m3/h), STT70 approx. 14.13 ft3 (0.4 m3/h) (*water temperature:42.8°F) (+6 °C) Rate your coolant circuit accordingly. Connect the coolant in- and outlets to the return air cooler.
STT40 / STT70 9. Troubleshooting 9.1. 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, 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.
STT40 / STT70 Problem Loss or reduction of process air temperature. Possible cause Corrective action Process heaters are faulty. Check for open heaters. Replace if required. Solid-state temperature controller faulty. Replace. Process temperature was adjusted in error by plant personnel. Process heaters are faulty. Desiccant beds are contaminated. Material being dried differs from material specified at the time of purchase. Loss or reduction in drying capacity.
STT40 / STT70 Problem Material in drying hopper cakes, or meltdown occurs. Possible cause Corrective action Process temperature set too high due to operator error. Check resin manufacturer’s data sheet for proper drying temperature. Make sure plant personnel are aware of the correct process temperature set point. High temperature alarm not set properly. Process set point is out of acceptable range. Function set for degrees Celsius (ºC), set point at degrees Fahrenheit (ºF).
STT40 / STT70 Problem Possible cause Corrective action No setting change possible on temperature controller. The key protection switch is set to ON. Input polarity on thermo-couple is wrong or connection is wrong. Set the key protection switch to OFF. Process value is abnormal or not obtained. Properly wire the terminals. Input-type setting is incorrect. Properly set the input with the input-type selector rotary switch. No compensating lead wires used for extension of the thermocouple.
STT40 / STT70 10. Technical data 10.1. STT40 amount of dehumidified air: max. 1,412.69 ft3/h, (40 m3/h) operating voltage: 230 V/AC/50 Hz special voltages can be supplied upon request connected load: 2.6 kW calorific output (drying)*: max. 1.5 kW *depending on the equipment with hopper heaters calorific output (regenerating): 0.7 kW driving power (drying, regenerating): 0.37 kW drying temperature: max. 356°F (+180 °C) width: 11.8 in. (300 mm) depth: 27.5 in. (700 mm) height: 35.5 in.
STT40 / STT70 10.3. Dimension Sheet A B C D STT 40 27.5” (700 mm) 3.2” (80 mm) 35.5” (900 mm) 11.8” (300 mm) STT 70 35.5” (900 mm) 3.2” (80 mm) 35.5” (900 mm) 15.7” (400 mm) Dimensions in inches (mm). Specifications may be subject to change without notice.
STT40 / STT70 11. Spare parts list This spare parts list must be used only by trained personnel. Other persons are not permitted to modify or repair the equipment.
STT40 / STT70 STT40 Pos. 1 2 ID-number 31940 31938 36212 84130 83957 83956 3 4 5 6 7 8 9 84129 85819 85820 94233 93298 85690 85691 96196 96353 92361 Description valve stem shaft housing disc with bush disc flywheel DU filter cartridge, when operating without return air cooler filter cartridge, when operating with return air cooler blower STT40 guide roll with fixing device guide roll seal hose clamp seal tension ring desiccant (6 kg) (13.23 lbs.
STT40 / STT70 STT70 Pos. 1 2 ID-number 31940 31938 36212 84130 83957 83956 3 4 5 6 7 8 9 85677 85819 85820 94233 97677 23917 97677 23533 96196 96353 92361 Description valve stem shaft housing disc with bush disc flywheel DU filter cartridge, when operating without return air cooler filter cartridge, when operating with return air cooler blower STT70 guide roll with fixing device guide roll sealing ring tension ring sealing ring tension ring sieve desiccant (13 kg)(28.76 lbs.
STT40 / STT70 Operating unit Pos.
STT40 / STT70 Control unit STT40 85280 motor 84131 radiator 0.7 kW 83339 pull-button 87440 contact element 83411 controller 82516 temperature limiter 88440 contactor 85941 terminal 85940 fuse 99102 fuse 88806 relay holder 88816 relay 84510 thermal breaker Hopper heater 85688 radiator 1,5 kW 85652 safety temperature limiter Control unit STT70 85279 motor 85676 radiator 1.
STT40 / STT70 12. Electrical manual This electrical manual is intended to be used by Sterling service personnel and trained personnel authorized by Sterling only. Other persons are not permitted to modify or repair the equipment. Connection diagram no.
STT40 / STT70 13.
STT40 / STT70 Basic temperature controller settings STT40 This information is intended to be used by Sterling service personnel and trained personnel authorized by Sterling only. Other persons are not permitted to modify or repair the equipment. Settings, if temperature is displayed in F° Code C111 0 0 0 0 C112 2 0 3 0 C113 0 5 3 4 C114 1 0 0 1 SPL 0 1 0 4 SPH* 0 2 8 4 * with return air cooler in use: 0 3 5 6 Parameter AL1 HYS1 rASd Parameter set 1 68.0 1 19.
STT40 / STT70 Basic temperature controller settings STT70 This information is intended to be used by Sterling service personnel and trained personnel authorized by Sterling only. Other persons are not permitted to modify or repair the equipment. Settings, if temperature is displayed in F° Code C111 0 0 0 0 C112 2 0 3 0 C113 0 5 3 4 C114 1 0 0 1 SPL 0 1 0 4 SPH 0 2 8 4 * with return air cooler in use: 0 3 5 6 Parameter AL1 HYS1 rASd Parameter set 1 68.0 1 19.
14. Quick Start Guides 14.1. for STT 40 Dryer 1. Check all wiring connections to ensure that they are in the correct place and have a good tight connection. 2. Hook up main single-phase power and ground. The following picture shows the correct location. Main power High Temp Safety Heater Connection Main Power Connection Thermocouple 3. Turn the disconnect switch to the “ON” position as shown. The green run light should light up.
4. Turn the dryer operation switch to the desired position. If you have a seven day timer installed, set it to “On with timer” position, otherwise set it to “On without timer” position. The blower will start. An explanation is given in the following diagram. OFF On with timer On without timer 5.
6. Once in position “I”, temperature controller will display as shown below. Blower must be running for temperature controller to be on. Temperature setting will vary as the processed desired temperature is changed. Also, a description of the buttons are listed below. Note: For initial start-up or if the dryer has not run for an extended period of time, turn the hopper heater switch to position “O”. Wait 2 hours for both beds to regenerate (without material in the hopper).
It is recommended that the dryer be Self-Optimized. The following steps should be taken to self optimize the dryer: a.) Press and hold the “EXIT” button for at least 2 seconds. b.) “tunE” will flash while self-optimization is in progress (can take several minutes) c.) When “tunE” stops flashing; self-optimization is completed. d.) When self-optimization is complete press “EXIT” key once. e.) At this point the dryer is ready to run continuously.
14.2. Proper Shut-down Guide for STT 40 Dryer 1. Turn the hopper heater switch to position “0” Position “O” Position “I” OFF 2. With the main disconnect power in the “ON” position, turn the dryer operation switch to the “OFF” position, this will automatically enable the system to go into cool down mode. That means the blower will run for 10 minutes. Note: This time is utilized to cool down the regeneration heater/cell. 3.
14.3. Quick Start Guide for STT 70 Dryer 1. Check all wiring connections to ensure that they are in the correct place and have a good tight connection. 2. Hook up main three-phase power and ground. The following picture shows the correct location. Main power High Temp Safety Heater Connection Main Power Connection Thermocouple 3. Turn the disconnect switch to the “ON” position as shown. The green run light should light up. 4. Turn the dryer operation switch to the desired position.
5. Turn the hopper heater switch to position “I” Position “O” Position “I” 6. Once in position “I”, the temperature controller will display as shown below. Blower must be running for temperature controller to be on. Temperature setting will vary as the processed desired temperature is changed. Also, a description of the buttons is listed below. Note: For initial start-up or if the dryer has not run for an extended period of time, turn the hopper heater switch to position “O”.
Note: Due to the following circumstances: - initial dryer start-up - dryer not running for long period of time - dryer has been unplugged and moved to a different location It is recommended that the dryer be Self-Optimized. The following steps should be taken to self optimize the dryer: a.) Press and hold the “EXIT” button for at least 2 seconds. b.) “tunE” will flash while self-optimization is in progress (can take several minutes) c.) When “tunE” stops flashing; self-optimization is completed. d.
14.4. Proper Shut-down Guide for STT 40 Dryer 1. Turn the hopper heater switch to position “0” Position “O” Position “I” OFF 2. With the main disconnect power in the “ON” position, turn the dryer operation switch to the “OFF” position, this will automatically enable the system to go into cool down mode. That means the blower will run for 10 minutes. Note: This time is utilized to cool down the regeneration heater/cell. 3.
Parts Department Call toll-free 7am–5pm CST [800] 423-3183 or call [414] 354-0970, Fax [414] 354-6421 The ACS Customer Service Group will provide your company with genuine OEM quality parts manufactured to Sterling 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.
