A3G350-AN01-03 Operating instructions ebm-papst Mulfingen GmbH & Co. KG Bachmühle 2 D-74673 Mulfingen Phone +49 (0) 7938 81-0 Fax +49 (0) 7938 81-110 [email protected] www.ebmpapst.com 1. SAFETY REGULATIONS AND INFORMATION Read these operating instructions carefully before starting work on the device. Observe the following warnings to prevent malfunctions or danger to persons. These operating instructions are to be regarded as part of the device. The device is only to be sold or passed on together with the operating instructions. These operating instructions may be duplicated and distributed to inform about potential dangers and their prevention. Translation of the original operating instructions CONTENTS 1. SAFETY REGULATIONS AND INFORMATION 1 1.1 Hazard levels for warnings 1.2 Staff qualifications 1.3 Basic safety rules 1.4 Voltage 1.5 Safety and protective features 1.6 Electromagnetic radiation 1.7 Mechanical movement 1.8 Emissions 1.9 Hot surface 1.10 Storage 1 1 1 1 2 2 2 2 2 2 2. INTENDED USE 3 3. TECHNICAL DATA 4 3.1 Product drawing 3.2 Nominal data 3.3 Data according to ErP Directive 3.4 Technical description 3.5 Mounting data 3.6 Transport and storage conditions 3.7 Electromagnetic compatibility 4 5 5 5 5 6 6 4. CONNECTION AND STARTUP 6 4.1 Mechanical connection 4.2 Electrical connection 4.3 Connecting the cables 4.4 Connection diagram 4.5 Checking connections 4.6 Switching on the device 4.7 Switching off the device 6 6 7 8 9 9 9 5. INTEGRATED PROTECTIVE FEATURES 9 6. MAINTENANCE, MALFUNCTIONS, POSSIBLE CAUSES AND REMEDIES 9 6.1 Cleaning 6.2 Safety inspection 6.3 Disposal 10 10 10 1.1 Hazard levels for warnings These operating instructions use the following hazard levels to indicate potentially hazardous situations and important safety regulations: DANGER Indicates an imminently hazardous situation which will result in death or serious injury if the specified actions are not taken. Compliance with the instructions is imperative. WARNING Indicates a potentially hazardous situation which can result in death or serious injury if the specified actions are not taken. Exercise extreme caution while working. CAUTION Indicates a potentially hazardous situation which can result in minor or moderate injury or damage to property if the specified actions are not taken. NOTE A potentially harmful situation can occur and, if not avoided, can lead to property damage. 1.2 Staff qualifications The device may only be transported, unpacked, installed, operated, maintained and otherwise used by suitably qualified, trained and authorized technical staff. Only authorized specialists are permitted to install the device, to carry out a test run and to perform work on the electrical installation. 1.3 Basic safety rules The safety hazards associated with the device must be assessed again following installation in the final product. Note the following when working on the device: ; Do not perform any modifications, additions or conversions on the device without the approval of ebm-papst. 1.4 Voltage ; Check the device's electrical equipment at regular intervals; see Chapter 6.2 Safety inspection. ; Replace loose connections and defective cables immediately. DANGER Electrically charged device Risk of electric shock → When working on an electrically charged device, stand on a rubber mat. WARNING Live terminals and connections even with device switched off Electric shock Item no. 51540-5-9970 · ENU · Change 89188 · Approved 2016-06-01 · Page 1 / 11 ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · [email protected] · www.ebmpapst.com A3G350-AN01-03 Operating instructions → Wait five minutes after disconnecting the voltage at all poles before opening the device. CAUTION In the event of a fault, the rotor and the impeller will be energized The rotor and the impeller have basic insulation. → Do not touch the rotor and impeller once installed. CAUTION If control voltage or a stored speed set value is applied, the motor will restart automatically, e.g. after a power failure. Risk of injury → Keep out of the device danger zone. → When working on the device, switch off the line voltage and ensure that it cannot be switched back on. → After working on the device, remove any tools or other objects from the device. 1.5 Safety and protective features DANGER Protective device missing and protective device not functioning Without a protective device there is a risk of serious injury, for instance when reaching into the device during operation. → Operate the device only with a fixed protective device and guard grille. → Do not wear any loose-fitting or dangling clothing or jewelry while working on rotating parts. → Protect long hair with a cap. 1.8 Emissions WARNING Depending on the installation and operating conditions, the sound pressure level may exceed 70 dB(A). Risk of noise-induced hearing loss → Take appropriate technical safety measures. → Protect operating personnel with appropriate safety equipment such as hearing protection. → Also observe the requirements of local agencies. 1.9 Hot surface CAUTION High temperature on electronics housing Risk of burns → Ensure sufficient protection against accidental contact. 1.10 Storage → The fixed protective device must be able to withstand the kinetic energy of a fan blade that becomes detached at maximum speed. There must not be any gaps which it is possible to reach into with the fingers, for example. ; Store the device, partially or fully assembled, in a dry and weatherproof manner in the original packaging in a clean environment. → The device is a built-in component. As the operator, you are responsible for ensuring that the device is secured adequately. ; We recommend storing the device for no longer than one year in order to guarantee trouble-free operation and the longest possible service life. → Stop the device immediately if you notice a missing or ineffective protective device. ; Even devices explicitly intended for outdoor use are to be stored as described prior to commissioning. 1.6 Electromagnetic radiation Translation of the original operating instructions WARNING Rotating device Long hair and dangling items of clothing, jewelry and the like can become entangled and be pulled into the device. Injuries can result. Interference from electromagnetic radiation is possible, e.g. in conjunction with open- and closed-loop control devices. If impermissible radiation levels occur following installation, appropriate shielding measures have to be taken by the user. ; Protect the device against environmental effects and dirt until final installation. ; Maintain the storage temperature, see Chapter 3.6 Transport and storage conditions. NOTE Electrical or electromagnetic interference after installing the device in customer equipment. → Verify that the entire setup is EMC-compliant. 1.7 Mechanical movement DANGER Rotating device Risk of injury to body parts coming into contact with the rotor or the impeller. → Secure the device against accidental contact. → Before working on the system/machine, wait until all parts have come to a standstill. Item no. 51540-5-9970 · ENU · Change 89188 · Approved 2016-06-01 · Page 2 / 11 ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · [email protected] · www.ebmpapst.com A3G350-AN01-03 Operating instructions 2. INTENDED USE The device is exclusively designed as a built-in device for conveying air according to its technical data. Any other usage above and beyond this does not conform with the intended purpose and constitutes misuse of the device. Customer equipment must be capable of withstanding the mechanical and thermal stresses that can arise from this product. This applies for the entire service life of the equipment in which this product is installed. Intended use also includes ● conveying air at an ambient air pressure between 750 mbar and 1050 mbar. ● Using the device within the permitted ambient temperature range; see Chapter 3.6 Transport and storage conditions and Chapter 3.2 Nominal data. ● Operating the device with all protective devices. ● Following the operating instructions. Improper use In particular, operating the device in the following ways is prohibited and could be hazardous: Operating the device in an unbalanced state, e.g. due to dirt deposits or ice formation. ● Conveying air that contains abrasive particles. ● Conveying highly corrosive air, e.g. salt spray. Exception: devices designed for salt spray and correspondingly protected. ● Conveying air with high dust content, e.g. suctioning off sawdust. ● Operating the device close to flammable materials or components. ● Operating the device in an explosive atmosphere. ● Using the device as a safety component or to perform safety-related functions. ● Operation with completely or partially disassembled or manipulated protective devices. ● In addition, all applications not listed among the intended uses. Translation of the original operating instructions ● Item no. 51540-5-9970 · ENU · Change 89188 · Approved 2016-06-01 · Page 3 / 11 ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · [email protected] · www.ebmpapst.com A3G350-AN01-03 Operating instructions 3. TECHNICAL DATA 3.1 Product drawing All dimensions in mm. Direction of air flow "V" Max. clearance for screw 10 mm Cable PVC 3G AWG20, 3x crimped splices Cable PVC 4x AWG22, 4x crimped splices Translation of the original operating instructions 1 2 3 4 Item no. 51540-5-9970 · ENU · Change 89188 · Approved 2016-06-01 · Page 4 / 11 ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · [email protected] · www.ebmpapst.com Operating instructions A3G350-AN01-03 3.2 Nominal data 3.4 Technical description Motor M3G074-CF Phase Nominal voltage / VAC Nominal voltage range / VAC Frequency / Hz 1~ 230 200 .. 240 Method of obtaining data Speed (rpm) / min-1 Power consumption / W Current draw / A Max. back pressure / Pa Min. ambient temperature / °C Max. ambient temperature / °C ml Weight Fan size Blade material Number of blades Airflow direction Direction of rotation Degree of protection Insulation class Moisture (F) / Environmental (H) protection class Installation position Condensation drainage holes Cooling hole/opening Mode Motor bearing Technical features 50/60 1475 165 1.35 100 -25 60 ml = Max. load · me = Max. efficiency · fa = Free air cs = Customer specification · ce = Customer equipment Subject to change 3.3 Data according to ErP Directive 01 Overall efficiency ηes / % 02 Measurement category 03 Efficiency category 04 Efficiency grade N 05 Variable speed drive 06 Year of manufacture Translation of the original operating instructions 07 Manufacturer 08 Type 09 Power consumption Ped / kW 09 Air flow qv / m³/h 09 Pressure increase total psf / Pa 10 Speed (rpm) n / min-1 11 Specific ratio* 12 Recycling/disposal 13 Maintenance 14 Additional components * Actual Req. 2015 39.8 A Static 51.2 Yes 28.6 40 The year of manufacture is specified on the product's rating label. ebm-papst Mulfingen GmbH & Co. KG Amtsgericht (court of registration) Stuttgart · HRA 590344 D-74673 Mulfingen A3G350-AN01-03 0.16 2400 87 1495 1.00 Information on recycling and disposal is provided in the operating instructions. Information on installation, operation and maintenance is provided in the operating instructions. Components used to calculate the energy efficiency that are not apparent from the measurement category are detailed in the CE declaration. Specific ratio = 1 + pfs / 100 000 Pa Data obtained at optimum efficiency level. The ErP data is determined using a motor-impeller combination in a standardized measurement setup. Touch current according to IEC 60990 (measuring circuit Fig. 4, TN system) Motor protection with cable Protection class Conformity with standards Approval 2.1 kg 350 mm Press-fitted sheet steel blank, sprayed with PP plastic 5 "V" Counterclockwise, viewed toward rotor IP54 "B" F3-1 Any None, open rotor On rotor side S1 Ball bearing - Output 10 VDC, max. 10 mA - Tach output - Power limiter - Motor current limitation - Soft start - Control input 0-10 VDC / PWM - Control interface with SELV potential safely disconnected from the mains - Overvoltage detection - Thermal overload protection for electronics/motor - Line undervoltage detection <= 3.5 mA PTC thermistor Variable I (with customer connection of protective earth) EN 60335-1; CE CCC; UL 1004-7 + 60730; C22.2 No.77 + CAN/CSA-E60730-1 With regard to cyclic speed loads, note that the rotating parts of the device are designed for a maximum of one million load cycles. If you have special questions, consult ebm-papst for support. 3.5 Mounting data For screw clearance, see Chapter 3.1 Product drawing ; Secure the screws against unintentional loosening (e.g. use selflocking screws). Strength class of screws 8.8 Any further mounting data required can be taken from the product drawing. Item no. 51540-5-9970 · ENU · Change 89188 · Approved 2016-06-01 · Page 5 / 11 ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · [email protected] · www.ebmpapst.com Operating instructions A3G350-AN01-03 DANGER Electrical charge (>50 µC) between phase conductor and protective earth connection after switching off supply with multiple devices connected in parallel. Electric shock, risk of injury 3.6 Transport and storage conditions ; Use the device in accordance with its degree of protection. Max. permitted ambient temp. for motor (transport/ storage) Min. permitted ambient temp. for motor (transport/ storage) + 80 °C → Ensure sufficient protection against accidental contact. Before working on the electrical hookup, short the supply and PE connections. - 40 °C CAUTION Voltage The fan is a built-in component and has no disconnecting switch. 3.7 Electromagnetic compatibility EMC immunity to interference EMC interference emission → Only connect the fan to circuits that can be switched off with an all-pole disconnection switch. According to EN 61000-6-2 (industrial environment) According to EN 61000-6-4 (industrial environment) → When working on the fan, secure the system/machine in which the fan is installed so as to prevent it from being switched back on. NOTE Water ingress into wires or cables Water ingress at the customer end of the cable can damage the device. 4. CONNECTION AND STARTUP → Make sure the end of the cable is connected in a dry environment. 4.1 Mechanical connection CAUTION Cutting and crushing hazard when removing fan from packaging → Carefully remove the device from its packaging, grasping it by only the blades near the hub. Strictly avoid shocks. 4.2.1 Requirements → Wear safety shoes and cut-resistant safety gloves. ; Check whether the data on the nameplate match the connection data. ; Check the device for transport damage. Damaged devices are not to be installed. ; Before connecting the device, make sure the power supply matches the device voltage. ; Install the undamaged device in accordance with your application. ; Only use cables designed for the current level indicated on the nameplate. For determining the cross-section, note the sizing criteria according to EN 61800-5-1. The protective earth must have a cross-section equal to or greater than that of the phase conductor. We recommend the use of 105 °C cables. Ensure that the minimum cable cross-section is at least AWG 26 / 0.13 mm². CAUTION Possible damage to the device If the device slips during installation, serious damage can result. → Ensure that the device is securely positioned at its place of installation until all fastening screws have been tightened. 4.2 Electrical connection Translation of the original operating instructions Only connect the device to circuits that can be switched off with an all-pole disconnection switch. DANGER Voltage on the device Electric shock → Always connect a protective earth first. → Check the protective earth. DANGER Faulty insulation Risk of fatal injury from electric shock Ground conductor contact resistance according to EN 60335 Compliance with the impedance specifications according to EN 60335 for the protective earth connection circuit must be verified in the end application. Depending on the circumstances of installation, it may be necessary to connect an additional protective earth conductor to the extra protective earth terminal on the device. 4.2.2 Reactive currents Because of the EMC filter integrated for compliance with EMC limits (interference emission and immunity to interference), reactive currents can be measured in the supply line even when the motor is at a standstill and the line voltage is switched on. → Use only cables that meet the specified installation regulations for voltage, current, insulation material, capacity, etc. → Route cables so that they cannot be touched by any rotating parts. ● The values are typically less than 50 mA. ● At the same time, the effective power in this operating state (operational readiness) is typically < 2 W. Item no. 51540-5-9970 · ENU · Change 89188 · Approved 2016-06-01 · Page 6 / 11 ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · [email protected] · www.ebmpapst.com A3G350-AN01-03 Operating instructions 4.2.3 Residual current circuit breaker (RCCB) Only pulse-current sensitive and/or universal residual current devices (type A or B) are permitted. As with variable frequency drives, residual current devices cannot provide personal safety while operating the device. When the device's power supply is switched on, pulsed charging currents from the capacitors in the integrated EMC filter can lead to the residual current devices tripping without delay. We recommend the use of residual current circuit breakers with a trip threshold of 300 mA and delayed tripping (super-resistant, characteristic K). 4.2.4 Locked-rotor protection Due to the locked-rotor protection, the starting current (LRA) is equal to or less than the nominal current (FLA). 4.3 Connecting the cables The device has external leads. ; First connect the "PE" (protective earth). Connect the cables according to your application. When doing so, observe Chapter 4.4 Connection diagram. Translation of the original operating instructions ● Item no. 51540-5-9970 · ENU · Change 89188 · Approved 2016-06-01 · Page 7 / 11 ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · [email protected] · www.ebmpapst.com Operating instructions A3G350-AN01-03 4.4 Connection diagram Drawing preliminary! Conn. CON10 CON11 CON12 Designation L N PE 2 4 3 0- 10V PWM Tach +10 V Color black blue green/ yellow yellow white red 1 GND blue Function/assignment Supply connection, power supply, phase, see nameplate for voltage range Supply connection, power supply, neutral conductor, see nameplate for voltage range Ground connection 0-10 V / PWM control input, Ri=100 kΩ, SELV Tach output, open collector, 1 pulse per revolution, Isink max = 10 mA, SELV Fixed voltage output 10 VDC +/-3 %, Imax. 10 mA, short-circuit-proof, power supply for ext. devices (e.g. pot), SELV Reference ground for control interface, SELV Translation of the original operating instructions No. Item no. 51540-5-9970 · ENU · Change 89188 · Approved 2016-06-01 · Page 8 / 11 ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · [email protected] · www.ebmpapst.com A3G350-AN01-03 Operating instructions 4.5 Checking connections 5. INTEGRATED PROTECTIVE FEATURES ; Ensure isolation from supply (all phases). ; Make sure a restart is impossible The integrated protective functions cause the motor to switch off automatically in the event of the faults described in the table. ; Check the cables for proper fit. Fault 4.6 Switching on the device Rotor position detection error Blocked rotor The device may only be switched on if it has been installed properly and in accordance with its intended use, including the required safety mechanisms and professional electrical hookup. This also applies for devices which have already been equipped with plugs and terminals or similar connectors by the customer. WARNING Hot motor housing Risk of fire → Ensure that no combustible or flammable materials are located close to the fan. ; Before switching on, check the device for visible external damage and make sure the protective devices are functional. ; Check the fan's air flow paths for foreign matter and remove any foreign matter found. ; Apply the nominal supply voltage. ; Start the device by changing the input signal. 4.7 Switching off the device Switching off the device during operation: ; Switch off the device via the control input. ; Do not switch the motor (e.g. in cyclic operation) on and off via power supply. Switching off the device for maintenance: ; Switch off the device via the control input. ; Do not switch the motor (e.g. in cyclic operation) on and off via power supply. ; Disconnect the device from the power supply. Translation of the original operating instructions ; When disconnecting, be sure to disconnect the ground connection last. Safety feature description/ function An automatic restart follows. ; After the blockage is removed, the motor restarts automatically. 6. MAINTENANCE, MALFUNCTIONS, POSSIBLE CAUSES AND REMEDIES Do not perform any repairs on your device. Send the device to ebmpapst for repair or replacement. WARNING Live terminals and connections even with device switched off Electric shock → Wait five minutes after disconnecting the voltage at all poles before opening the device. CAUTION If control voltage or a stored speed set value is applied, the motor will restart automatically, e.g. after a power failure. Risk of injury → Keep out of the device danger zone. → When working on the device, switch off the line voltage and ensure that it cannot be switched back on. → After working on the device, remove any tools or other objects from the device. If the device is out of use for some time, e.g. when in storage, we recommend switching it on for at least two hours to allow any condensation to evaporate and to move the bearings. Malfunction/fault Impeller not running smoothly Possible cause Imbalance in rotating parts Motor not turning Mechanical blockage Line voltage faulty Faulty connection Possible remedy Clean the device; replace it if imbalance persists after cleaning. Make sure no weight clips are removed during cleaning. Switch off, isolate from supply and remove mechanical blockage. Check line voltage, restore power supply, apply control signal. Isolate from supply, correct connection; see connection diagram. Item no. 51540-5-9970 · ENU · Change 89188 · Approved 2016-06-01 · Page 9 / 11 ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · [email protected] · www.ebmpapst.com Operating instructions A3G350-AN01-03 Motor/electronics overtemperature Deficient cooling Improve cooling. Let the device cool down. To reset the error message, switch off the line voltage for at least 25 s and then switch it on again. Ambient temperature Reduce the ambient too high temperature. Reset by reducing control input to 0. Impermissible point of Correct the operating operation point. Let the device cool down. 6.3 Disposal For ebm-papst, environmental protection and resource preservation are top priority corporate goals. ebm-papst operates an environmental management system which is certified in accordance with ISO 14001 and rigorously implemented around the world on the basis of German standards. Right from the development stage, ecological design, technical safety and health protection are fixed criteria. The following section contains recommendations for ecological disposal of the product and its components. 6.3.1 Country-specific legal requirements NOTE Country-specific legal requirements Always observe the applicable country-specific legal regulations with regard to the disposal of products or waste occurring in the various phases of the life cycle. The corresponding disposal standards are also to be heeded. In the event of further malfunctions, contact ebm-papst. 6.1 Cleaning 6.3.2 Disassembly NOTE Damage to the device during cleaning Malfunction possible → Do not clean the device using a water jet or high-pressure cleaner. Disassembly of the product must be performed or supervised by qualified personnel with the appropriate technical knowledge. The product is to be disassembled into suitable components for disposal employing standard procedures for motors. WARNING Heavy parts of the product may drop off. Some of the product components are heavy. These components could drop off during disassembly. This can result in fatal or serious injury and material damage. → Do not use any acid, alkali or solvent-basedcleaning agents. → Do not use any pointed or sharp-edged objects for cleaning 6.2 Safety inspection NOTE High-voltage test The integrated EMC filter has Y capacitors. The tripping current is exceeded when AC testing voltage is applied. Translation of the original operating instructions → Test the device with DC voltage when you perform the legally required high-voltage test. The voltage to be used corresponds to the peak value of the AC voltage required by the standard. What to check Contact protection cover for intactness or damage Device for damage to blades and housing Fastening the cables Fastening the protective earth terminal Insulation of cables for damage Welds for crack formation How to check How often Visual inspection At least every 6 months What action? Repair or replacement of device Visual inspection At least every 6 months Replacement of device Visual inspection At least every 6 months Visual inspection At least every 6 months Fasten Visual inspection At least every 6 months Replace cables Visual inspection At least every 6 months Fasten Replace device → Secure components before unfastening to stop them falling. 6.3.3 Component disposal The products are mostly made of steel, copper, aluminum and plastic. Metallic materials are generally considered to be fully recyclable. Separate the components for recycling into the following categories: ● Steel and iron ● Aluminum ● Non-ferrous metal, e.g. motor windings ● Plastics, particularly with brominated flame retardants, in accordance with marking ● Insulating materials ● Cables and wires ● Electronic scrap, e.g. circuit boards Only ferrite magnets and not rare earth magnets are used in external rotor motors from ebm-papst Mulfingen GmbH & Co. KG. ; Ferrite magnets can be disposed of in the same way as normal iron and steel. Electrical insulating materials on the product, in cables and wires are made of similar materials and are therefore to be treated in the same manner. The materials concerned are as follows: ● Miscellaneous insulators used in the terminal box ● Power cables ● Cables for internal wiring ● Electrolytic capacitors Item no. 51540-5-9970 · ENU · Change 89188 · Approved 2016-06-01 · Page 10 / 11 ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · [email protected] · www.ebmpapst.com A3G350-AN01-03 Operating instructions Dispose of electronic components employing the proper procedures for electronic scrap. Translation of the original operating instructions → Please contact ebm-papst for any other questions on disposal. Item no. 51540-5-9970 · ENU · Change 89188 · Approved 2016-06-01 · Page 11 / 11 ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · [email protected] · www.ebmpapst.com