Operating Instructions SM2-605 Dehumidified air dryer STT 110 STT 160 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. 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.
STT 110 / STT 160 Sterling Material Processing 5200 West Clinton Ave. Milwaukee, WI 53223 Telephone: (414) 354-0970 Fax: (414) 354-6421 www.sterlco.
STT 110 / STT 160 Sterling Material Processing retains all rights to change the information in these operating instructions at any time without notice. SM2-605 We assume no liability for any errors or direct or indirect damage resulting in context with these operating instructions. Copying, translation or publication in any form except for personal use of purchaser requires approval from Sterling Material Processing. All rights reserved.
STT 110 / STT 160 Table of contents 1. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.1. 1.2. 1.3. 1.4. 1.5. Warnings and symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Explanations and information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Legal basis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STT 110 / STT 160 6.1. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2 6.2. Drying Hopper (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5 6.2.1. Hopper Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6 6.3. Connection to a Pneumatic Conveying System (Optional) . . . . . . . . . . . . . . . . 6-7 6.4. Return Air Cooler (Optional) . . . .
STT 110 / STT 160 1. General Information These operating instructions must be used by every person charged with work on the unit. SM2-605 » These operating instructions are addressed to all users of the device.
STT 110 / STT 160 1.1. Warnings and symbols The following warnings and symbols are used in these operating instructions: L This symbol indicates that serious injury is possible if the corresponding instructions, regulations or warnings are not observed. F This symbol indicates that extensive damage to equipment is possible if the corresponding instructions, regulations or warnings are not observed. & This symbol indicates information important for becoming familiar with the equipment, i.e.
STT 110 / STT 160 When disposing of drying agents / batteries / oil, observe all official rules. Caution: High noise pollution ! For all work on the equipment, hearing protection should be worn. Avoids impairment of hearing! Caution: Danger of crushing ! Disconnect the equipment from mains supply before starting mainenance procedures. All compressed air pipes on the equipment should be depressurised before starting maintenance work.
CTT 110 / CTT 160 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 on their own responsibility or according to instructions.
STT 110 / STT 160 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 connected with the equipment. These operating instructions are to be used by all persons assigned activities connected with the equipment. Knowledge of the English language is prerequisite.
STT 110 / STT 160 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.
STT 110 / STT 160 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.
STT 110 / STT 160 Operate the dryer only if there is at least one drying hopper operating. This will prevent damage of material! When drying plastics which emit gases dangerous for human health, take care that the regeneration exhaust air is disposed of without polluting the environment. This will prevent danger to people and material! Maintenance Before starting maintenance work, appoint a supervisor. Inform the responsible personnel before maintenance work on the system is started.
STT 110 / STT 160 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 loose. Never readjust sensors without exactly knowing their functions.
STT 110 / STT 160 3. Start up » This chapter is addressed to the operators of the machine. This chapter assumes general skills with drying equipment. This chapter assumes that the functional description has been read and understood. It must be ensured that the operators have the required experience. F Make sure that the main switch is at “0" position. Check the drying hopper for cleanliness. Check to see whether the adhesive film on the drying hopper has be removed.
STT 110 / STT 160 3.1. Initial Operation Check whether the inlet of the drying hopper is closed by a blind lid, or whether a conveyor unit (optional) is installed. If not, manufacture a suitable blind lid and install it on the inlet of the drying hopper or install the conveyor unit (optional). F Attachments which are not supplied by Sterling must be manufactured according to the safety regulation European Standard 294.
STT 110 / STT 160 Turn the release switches “Hopper” (ST1 - ST6) at “I” position. Turn the thermo regulator to +80 °C (176°F) for the drying temperature. Press the “PGM” key. Set by means of the arrow keys the drying temperature to “80". After 2 seconds the display flashes and the value is stored. Press the “EXIT” key (the setpoint value and the actual value of the drying temperature are displayed). EXIT After 2 hours turn the release switches “Hopper” (ST1 - ST6) at “0” position.
STT 110 / STT 160 3.2. Continuous Operation F Fill at least half of the drying hopper with material. 3.2.1. Switching the Dryer on Switch on the main switch of the dryer. & The signal lamp “power” goes on. For operation with timer clock (optional): Turn the release switch “Timer” at position: For operation without timer clock: Turn the release switch “Timer” at position: The blower is running.
STT 110 / STT 160 3.2.2. Setting the Drying Temperature Turn the release switches “Hopper” (ST1, ST2) at “I” position. For each drying hopper, set the required drying temperature (= desired value) by means of the respective thermo regulator. Check whether the set drying temperature is appropriate for the materials which have been filled in. Observe the instructions of the material manufacturer. After the first filling, process the material only after the retention period is over.
STT 110 / STT 160 Optimizing the thermo regulator Press the “EXIT” key for at least 2 seconds. “tunE” flashes. The optimization can take several minutes. EXIT 60 tunE PGM If “tunE” stops flashing, the optimization is finished. K1 K2 K3 EXIT 60 tunE PGM EXIT Press the “EXIT” key.
STT 110 / STT 160 3.3. Switching the Dryer off Set the release switch “Timer” at position: L Wait until the blower has stopped. The run on time of the blower is 10 minutes. If there is a return air cooler installed, switch off its coolant circuit. Switch off the main switch of the dryer. The signal lamp “power” goes off.
STT 110 / STT 160 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. This chapter assumes that the “start-up” description has been read and understood. It should be ensured in each and every case that the operators have the relevant skills. F Faults must be eliminated before the control system can again start operating. & An alarm is indicated by steady light of the signal lamp “trouble”.
STT 110 / STT 160 The follow ing errors can lead to an alarm: Blower The pressure of the blower is too low. Check the blower. Vacuum sensor defective. Regeneration heater 1 The safety temperature limiter of the regeneration heater 1 has been activated. Check the safety temperature limiter. Sterling Service. Regeneration heater 2 The safety temperature limiter of the regeneration heater 2 has been activated. Check the safety temperature limiter. Sterling Service.
STT 110 / STT 160 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 regulations 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 theights of over approx. 1829 mm (6 ft.
STT 110 / STT 160 F Please observe the maintenance schedule. Before starting maintenance work, clean the equipment of oil, fuel or lubricant. 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. SM2-605 Keep record of all maintenance and repair procedures.
STT 110 / STT 160 5.1.
STT 110 / STT 160 5.2. Cleaning or Replacing the Air Filter Set the release switch “Timer” at position: L Wait until the blower has stopped. The run on time of the blower is 10 minutes. If there is a return air cooler installed, switch off its coolant circuit. L Switch off the main switch of the dryer (the signal lamp “power” goes off). Interrupt the mains supply so that the device cannot be switched on unintentionally.
STT 110 / STT 160 5.2.1. Cleaning or Replacing the Return Air Filter STT 110 / STT 160 Detach the nut on the housing of the return air filter and remove the housing cover. Air filter 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. Blow compressed air from the inside out through the clogged filter cartridge or replace the filter cartridge.
STT 110 / STT 160 5.3. 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. & It is not possible for Sterling to take back the used drying agent or drying cells with used drying agents. 5.3.1. 5.3.2. 5.3.3. 5.3.4. 5.3.5. 5.3.6. 5.3.7. SM2-605 5.3.8. 5.3.9.
STT 110 / STT 160 5.4. Cleaning the Drying Hopper Set the release switch “Timer” at position: L Wait until the blower has stopped. The run on time of the blower is 10 minutes. If there is a return air cooler installed, switch off its coolant circuit. L Switch off the main switch of the dryer (the signal lamp “power” goes off). Interrupt the mains supply so that the device cannot be switched on unintentionally. F Clean the drying hopper each time you are changing the materials.
STT 110 / STT 160 ST 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). A Clean the drying hopper. Close the hopper lid and close the toggle-type fasteners (A) (if in use: re-mount the single conveyor). TT 25 SM2-605 F Remove any granules remaining in the cleaning opening.
STT 110 / STT 160 ST 60 - ST 1600 Open the cleaning opening of the drying hopper: Lift and turn the handle (A) to open the lock, if in use: remove before the single conveyor (ST 400 - ST 1600: 2 handles). Clean the drying hopper. Close the cleaning opening of the drying hopper: Turn the handle (A) until the cleaning opening is locked and then close the handle (if in use: re-mount the single conveyor). ST 1200 and ST 1600: Clean the bead. SM2-605 F Remove any granules remaining in the cleaning opening.
STT 110 / STT 160 6. Functional description » This functional description is addressed to the operators of the equipment. This functional description assumes general familiarity with drying equipment. SM2-605 It should be verified that the operators do indeed have the appropriate skills.
STT 110 / STT 160 6.1. General Information The dehumidified air dryers were developed for drying plastic granules. Due to their compact construction, they can be employed 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 ac cording to the dehumidified air principle, i.e., the air is not only heated but also dehumidified before it flows through the drying hopper.
STT 110 / STT 160 All function sequences 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 means of dehumidified air.
STT 110 / STT 160 A digital display of the current dew point temperature can be supplied as additional equipment. As an option, a timer clock can be supplied which switches the dryer on or off at preselected times. Read the operating manual of the timer clock.
STT 110 / STT 160 6.2. Drying Hopper (Optional) The material is dried in the drying hopper. The dehumidified air is conducted through the material in the drying hopper and takes up 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 first be dried completely before material can be taken out for the first time.
STT 110 / STT 160 6.2.1. Hopper Heater Each drying hopper has its own hopper heater. The temperature of the dehumidified air is adjusted by means of the thermo regulator. The setting range is from +60 - +180 °C. The current temperature can be read off the digital display (= actual value). F The thermo regulator is factory-programmed. Nevertheless, you have to set specific values which are dependent on the processed material.
STT 110 / STT 160 6.3. Connection to a Pneumatic Conveying System (Optional) Your drying facility works best in combination with a pneumatic conveying system. In this way, your drying hopper will always be supplied with sufficient material. The facility will only take as much material as is required by the processing machines. Therefore, the drying result will always be the same. Sterling drying hoppers are equipped with a suitable flange for adding a Sterling pneumatic conveyor.
STT 110 / STT 160 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 that the operating personnel are sufficiently informed.
STT 110 / STT 160 7.1. Tansport and Packing » F Please ensure adequate carrying capacity of the lifting equipment. Note that the dryer system is top-heavy. Risc of toppling! The machine must not be tilted or laid on its side. 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.
STT 110 / STT 160 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. F The machine must not be tilted or laid on its side.
STT 110 / STT 160 8. Assembly instructions » These installation instructions are intended for persons with skills in electrical and mechanical areas due to their training, experience and received instructions. Personnel using these installation 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 that the personnel are informed.
STT 110 / STT 160 8.1. Installation of the exhauster 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 exhauster system) that the regeneration exhaust air is very humid.
STT 110 / STT 160 8.3. Electrical Connection » The electrical connection of the dryer and of the hopper heaters may only be carried through or assigned by Sterling service staff or by qualified staff authorized by Sterling. Other persons are not permitted to carry through the electrical connection. Observe the rules of the local electricity board. The main switch must be freely accessible. Ground the equipment against electrostatic charging.
STT 110 / STT 160 8.4. Connection of Return Air Cooler (Optional) F A return air cooler must be employed if the return air temperature is higher than +65 °C (149°F). You can connect the return air cooler to a coolant circuit or to the water mains network. The water flow rate in the water mains network* is for: STT 110. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . approx. 0.35 m3/h (12.46 cf/h) STT 160 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STT 110 / STT 160 9. Technical Data 9.1. STT 110 amount of dehumidified air:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . max. 110 m3/h (3,8846.1 cf/h) operating voltage:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 V/3 AC/50 Hz special voltages can be supplied on request connected load: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 kW calorific output (drying)*: . . . . .
STT 110 / STT 160 9.2. STT 160 amount of dehumidified air:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . max. 160 m3/h (5,650.35 cf/h) operating voltage:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 V/3 AC/50 Hz special voltages can be supplied on request connected load: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.6 kW calorific value (drying)*:. . . . . . . . . . . . . . .
STT 110 / STT 160 9.3. Dimension Sheet SM2-605 Dimensions and data without obligation. Dimensions in mm. (in.) Specifications may be subject to alterations.
STT 110 / STT 160 10. Spare parts list Other persons are not permitted to modify or repair the equipment. SM2-605 » This spare parts list is intended to be used only by trained personnel.
STT 110 / STT 160 STT 110 / STT 160 1 6 2 2 4 5 2, 3 7 Pos.
STT 110 / STT 160 Return air cooler (optional) 29786 return air cooler 83972 hose Hopper heater 85343 84512 85652 radiator 1,5 kW thermal breaker temperature limiter 85338 84510 85652 radiator 3,0 kW thermal breaker temperature limiter 85363 84509 85652 radiator 6,0 kW thermal breaker temperature limiter 85651 84508 85652 radiator 9,0 kW thermal breaker temperature limiter 86371 89846 93303 86387 Pt Pt Pt Pt 18232 air control flap 84492 thermometer 06925 flow indicator (3 m) (6 m) (9 m)
STT 110 / STT 160 Operating unit 5 4 6 7 ID-number Description 1 82368 main switch 2 82394 82393 82495 LED element, green cap fixing adapter 3 82494 82392 82495 LED element, white cap fixing adapter 4 26207 dew point display (optional) 5 82395 82490 selector switch actuator contact element 6 87454 thermo regulator TT1 - TT6 7 85241 83646 timer clock (optional) sealing 2 1 SM2-605 Pos.
STT 110 / STT 160 Control unit motor 85675 radiator 2.
STT 110 / STT 160 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. o Connection diagram no.
STT 110 / STT 160 12.
STT 110 / STT 160 Basic setting thermo regulator » This information 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.
