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Operation Instructions
Dehumidified air dryer
STT40
STT70
Sterling Material Processing
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STT40 / STT70 Sterling Material Processing 5200 West Clinton Ave. Milwaukee, WI 53223 Telephone: (414) 354-0970 Fax: (414) 354-6421 www.sterlco.com Technical service: Service department Telephone: (800) 423-3183 Edition: 07/03 These operation instructions are for*: (* please fill in personally) Serial number: Year of manufacture: Date of Delivery: Number of delivery: Date commissioned: Location: Group of machines: 2
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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. 3
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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 ...........................................................................................
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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............
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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. This symbol indicates that serious injury
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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. Caution: Danger, surface is hot ! Before start
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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. • Operator: The ”oper
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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. For your safety, ensure that the operating personnel are familiar with the operating instructions and the fun
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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. Improper operation results in danger of accidents! Please note that not all conceivable cases regarding oper
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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. Danger of accidents! The e
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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 im
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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. Please ensur
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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. If there is a return air cooler, switch on the
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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. Check whether the coolant circuit of the return air cooler (if a return air cooler is installed)
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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”
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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 r
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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. After filling the drying hopper you must wait for the resonance time of the mate
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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. Start up 3-6
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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. Start up 3-7
