Guide Specification for Siemens BT300 HVAC Variable Frequency Drives Division 23/26/29

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May, 2016 Guide Specification for Siemens BT300 HVAC Variable Frequency Drives Division 23/26/29 PART 1 - GENERAL 1.01 Description A. This specification covers the complete Variable Frequency Drive (VFD) consisting of a pulse width modulated (PWM) inverter designed for use on a standard Type Design B induction motor. The drive shall be manufactured by Siemens, be designed specifically for variable torque applications, and shall be designated BT300 Series or approved equal. B. The drive manufacturer shall supply the AC drives and all necessary controls as herein specified. The manufacturer shall have been engaged in the production of this type of equipment for a minimum of fifteen years. 1.02 Quality Assurance A. Referenced Standards 1. Underwriters Laboratories a. UL and cul approved b. UL508A c. UL508C 2. National Electrical Manufacturer s Association (NEMA) a. ICS 7.0 AC Adjustable Speed Drives. 3. International Electro technical Commission (IEC) a. EN/IEC 61800-3 First and Second Environment. 4. National Electric Code (NEC) a. NEC 430.120, Adjustable-Speed Drive Systems. Page 1 of 9

5. International Building Code a. Seismic IBC-2012 Section 1705.12 and CBC 2013 Section 1705.12. 6. UL 1995 Plenum Rating 7. RoHS 8. NEMA ICS 3.1 Safety Standards for Construction and Guide for Selection, Installation and Operation of Variable Frequency Drive Systems. 9. NEMA 250 Enclosures for Electrical Equipment (1000 Volts Maximum). B. Testing Page 2 of 9 1. The VFD shall have undergone extensive testing from design to deployment. This testing includes highly accelerated stress testing in extreme temperatures, vibration, and humidity as well as current and voltage variations. 2. All printed circuit boards shall be completely tested and burned-in before being assembled into the completed VFD. All testing and manufacturing procedures shall be ISO 9001 certified. Test reports shall be included with supplied drive. C. Qualifications 1. VFDs and options shall be UL508 and cul listed as a complete assembly. The base VFD shall have a short circuit withstand rating of 100,000 AIC. 2. The VFD assembly including bypass if specified, shall be seismically certified and labeled in accordance with the 2012 International Building Code (IBC). 3. The base VFD shall conform to the European Union Electromagnetic Compatibility directive and CE requirement. The VFD fulfills IEC61800-3 First and Second environment. 4. All enclosures, UL Type 1 and UL Type 12 (with or without an integral disconnect) shall have the same footprint. 5. Acceptable Manufacturers: 1.03 Submittals a. Siemens Building Technologies. b. Additional manufacturers must submit in writing to the Engineer for approval. A. Submittals shall include the following information: 1. Outline dimensions, conduit entry location and weights. 2. Customer connection and power wiring diagrams. 3. Complete technical product description including a complete list of options provided.

1.04 Delivery, Storage and Handling A. Deliver, store, protect and handle products to site, under provisions of Section 01610. B. Accept VFD on site in original factory packing. Inspect for damage. C. Store in a clean, dry space. Maintain factory wrapping or an additional cover to protect units from dirt, water, construction debris and traffic. D. Handle in accordance with manufacturer s written instructions to avoid damage to components, enclosure and finish. Part 2 PRODUCTS 2.01 Variable Frequency Drives A. The Variable Frequency Drives (VFDs) shall be solid state, with 6-pulse width modulated (PWM) output. B. The VFD package as specified herein shall be enclosed in a Type 1/Type 12 enclosure, completely assembled and tested by the manufacturer. C. The VFD shall employ a full wave rectifier (to prevent input line notching), capacitors, and Insulated Gate Bipolar Transistors (IGBTs) as the output-switching device. D. The drive efficiency shall be greater than 97.5% or better at full speed and full load. E. Displacement power factor shall be no less than 0.98 at all speeds and loads. F. All VFDs provided shall have the following: 1. Input voltage 208-240V, 380-500V nominal voltage. 2. VFDs shall be capable of continuous full load operation under the following conditions: a. Voltage tolerance + or 10% of specified line voltage. Output Frequency 0 to 90 Hz. b. Environmental operating conditions: 32 F to 104 F (0 C to 40 C), 0 to 3280 feet (1000 meters) above sea level. c. Relative humidity of 0 to 95%, non-condensing. d. Storage temperature -4 F to 158 F (-20 C to 70 C). e. Ambient operating temperature 14 F to 104 F (-10 C to 40 C). f. Overload Capability: 1.1 time nominal rated output current 110% for 1 minute/10 minutes. g. The VFD shall include EMI/RFI filters. The entire assembly shall be CE marked and meet EMC Immunity IEC 61800-3 (2004) First and Second environment and EMC Emissions to meet EN61800-3 (2004) Category C2. h. Enclosure shall be rated UL Type enclosures, or as specifically mentioned elsewhere. Page 3 of 9

G. All VFDs shall have the following standard features: 1. All VFDs shall have the same customer interface, including digital display and keypad, regardless of horsepower rating and voltage. a. The keypad is to be used for local control, for setting all parameters and for stepping through the displays and menus. The keypad shall be removable, capable of remote mounting and have its own non-volatile memory. The keypad shall be capable of uploading and downloading of parameter settings as an aid for start-up of multiple VFDs. 2. The keypad shall include Hand, Auto, and Off selections. When in Hand mode, the VFD will be started and the speed will be controlled from the up/down arrows. When in Off mode, the VFD will be stopped. When in Auto mode, the VFD will start using an external contact closure, and the VFD speed will be controlled using an external speed reference. The drive shall incorporate bumpless transfer of speed reference when switching between Auto and Hand modes. 3. All circuit boards shall meet air quality standards, IEC 60068-2-60 H2S (hydrogen sulfide) and SO 2 (sulfur dioxide); chemical vapors IEC 60721-3-3, unit in operation in class 3C2 and mechanical particles to IEC 60721-3-3, class 3S3. 4. A built-in time clock shall be housed in the keypad. The clock shall have a battery back-up with 10 years minimum life span, The clock shall be used to date and time-stamp faults and record operating parameters at the time of fault. 5. The VFD shall have start-up wizards visible on the keypad for quick access to application macros specifically designed to facilitate start-up. 6. The user shall be able to define any parameter as a favorite using the keypad. 7. The VFD shall have cooling fans designed to be replaced without removing the VFD from the wall or removing the VFD enclosure. The cooling fan shall have a design life of 10 years. 8. The VFD shall include DC bus capacitors which do not require conditioning prior to installation. The capacitors shall have an infinite shelf life. 9. The VFD cooling fans shall operate on start command or based on drive temperature. The user shall have the ability to choose cooling fan operation control. 10. The VFD shall monitor and display using the keypad s nine (9) parameters at one time without the need to scroll through multiple screens. Each parameter shall be user-defined. The following is a sample of the parameters which can be monitored and viewed using the keypad. All parameters viewed from the list below shall be capable of being displayed at all times. The display shall be in complete English words (alpha-numeric codes are not acceptable). Output Frequency Motor Speed (RPM, %, or Engineering units) Motor Current Calculated Motor Power (kw) Heatsink Temperature (deg F) Analog Input Values Keypad Reference Values KWh meter (resettable) Digital input status Calculated Motor Torque DC Bus Voltage Output Voltage Analog Output Value Elapsed Time Meter (resettable) MWh meter Digital output status Page 4 of 9

11. The VFDs shall include a Quick Start-up wizard that leads the user through the typical HVAC required parameters. 12. The VFD shall have the ability to automatically restart after an overcurrent, overvoltage, undervoltage, or loss of input signal protective trip. The number of restart attempts, trial time, and time between reset attempts shall be programmable. 13. The VFD shall be capable of starting into a rotating load (forward or reverse) and accelerate or decelerate to speed command without tripping or component damage (flying start). 14. The VFD shall be capable of DC injection braking that can be employed to stop a freewheeling motor prior to starting to avoid overvoltage nuisance tripping. 15. The VFD shall have the ability to be programmed to automatically extend the ramp-down time as required to keep the drive from tripping on over-voltage caused by regeneration of power by the load 16. If the input sped reference (4 to 20 ma or 0 to 10V) is lost, the VFD shall give the user the option of either (1) stopping and displaying a fault, (2) running at a programmable preset speed, (3) holding the VFD speed based on the last good reference received, or (4) cause a warning to be issued, as selected by the user. The drive shall be programmable to signal this condition via a keypad warning, relay output and/or over the serial communication bus. 17. The VFD shall include two-zone PID controllers that allow the drive to maintain PID control from two separate feedback signals. VFD shall include two PID setpoint sources, a sleep mode function, PID set point boost and a feed forward function to improve process response. 18. Run permissive circuit shall be included for damper or valve control. 19. The customer terminal strip shall be isolated from the line and ground. 20. The drive shall employ current limit circuits to provide trip free operation: a. The Slow Current Regulation limit circuit shall be adjustable to 150% (minimum) of the VFD's normal duty current rating. This adjustment shall be made via the keypad, and shall be displayed in actual amps, and not as percent of full load. b. The Current Switch-off limit shall be fixed at 180% (minimum, instantaneous) of the VFD's normal duty current rating. 21. The overload rating of the drive shall be 110% of its normal duty current rating for one minute in every 10 minutes. 22. The VFD shall have integrated DC bus chokes equivalent to 5% impedance.. 23. The VFD shall incorporate a Multi-Pump Controller Wizard capable of controlling up to four motors. The VFD is connected to one motor which is the "regulating" motor connecting and disconnecting the other motors to/from the mains, by means of contactors controlled with relays to maintain a given setpoint. This function shall have an auto-change function for changing starting order of pumps which allows for equal wear on all pumps. 24. The VFD shall be capable of sensing a loss of load (broken belt/no water in pump) or high current mechanical sensing failure, and signal the loss of load condition. The drive shall be programmable to signal this condition using a keypad warning, relay output and/or over the serial communications bus. 25. The VFD shall include a motor disconnect switch ride-through and is enabled or disabled through the keypad. This feature allows the motor disconnect switch to be opened and closed without stopping or tripping the drive. H. All VFDs to have the following adjustments: 1. Three (3) programmable critical frequency lockout ranges to prevent the VFD from operating the load continuously at an unstable speed. Page 5 of 9

2. A custom PID preset for HVAC and fluid systems, allows a pressure or flow signal to be connected to the VFD, using the microprocessor in the VFD for the closed loop control. The VFD shall have 250 ma of 24 Vdc auxiliary power and be capable of loop powering a transmitter supplied by others. The PID setpoint shall be adjustable from the VFD keypad, analog inputs, digital inputs, or over the communications bus. A sleep mode shall be included in the PID functions. This feature shall allow the motor to be stopped when at minimum speed for a user-defined period, for additional energy savings. 3. Two (2) programmable analog inputs shall accept a current or voltage. 4. Analog inputs shall include a filter to remove any oscillation in the input signal. The minimum and maximum values (gain and offset) shall be adjustable within the range of 0 to 20 ma and 0 to 10 Volts. Additionally, the reference must be able to be scaled so that maximum reference can represent a frequency less than 60 Hz, without lowering the drive maximum frequency below 60 Hz. Process variables shall be capable of being inverted. 5. Six (6) programmable and isolated digital inputs for maximum flexibility in interfacing with external devices. These inputs can also be used to activate the setpoints of individual control loops. 6. One (1) programmable analog output proportional to Frequency, Motor Speed, Output Voltage, Output Current, Motor Torque, Motor Power (kw), DC Bus voltage, Active Reference, and other data. Output will be selectable for 0 to 10 Vac or 4 to 20 ma. 7. Three (3) programmable digital relay outputs. The relays shall be rated for maximum switching current 8 amps at 250 Vac, 8 amps at 24 Vdc and 0.4 A at 125 Vac. Two (2) outputs shall be Form C and one (1) Form A. Open collector outputs are not acceptable. 8. Seven (7) programmable preset speeds. 9. Two (2) independently adjustable accel and decel ramps. These ramp times shall be adjustable from 1 to 3000 seconds. 10. The VFD shall be capable of catching a spinning motor In the forward or reversing direction 11. The VFD shall Ramp or Coast to a stop, as selected by the user. 12. The displayed operating information shall be user-defined and include up to nine (9) parameters which can be viewed and monitored at one time. 13. All applicable operating values shall be displayed in engineering (user) units. 14. The keypad shall include a backlit LCD display. The display shall be in complete words for programming and fault diagnostics. 15. The keypad shall utilize wizards to help navigate the HVAC application. These wizards will walk the user through the steps required for PID set-up, Start-up, Multi-pump Mode and Fire-Mode. 16. The VFD shall include a fireman s override input. 17. The VFD shall have the following protection circuits. The drive shall announce the fault condition in full text on the keypad display, and shall display a HELP function which explains the possible cause of the fault and the possible remedy. The protection circuits are: a. Overcurrent b. Overvoltage c. Undervoltage d. Unit over-temperature protection e. Ground fault protection Page 6 of 9

f. Mains supervision g. Motor phase supervision h. Motor stall protection i. Motor overload protection j. Motor underload protection k. Short-circuit protection of +24V 18. Speed Command Input shall be accomplished using any of the following: a. Keypad b. Two (2) Analog inputs, each capable of accepting a 0 to 20mA, 4 to 20mA, 0 to 10V, 2 to 10V signal, and direct NI 1000 temperature sensor input. c. Serial Communications I. Communications 1. The VFD shall have an RS-485 and Ethernet as standard. The standard embedded protocols shall be BACnet MS/TP, BACnet IP, Modbus RTU, Modbus TCP, Siemens APOGEE P1 (FLN) protocol and Johnson Controls. Inc. N2 Metasys protocol. There shall be an optional LON (LONMARK) interface. 2. Serial communication capabilities shall include, but not be limited to, run-stop control; speed set adjustment, proportional/integral/derivative PID control (Setpoint) adjustments and accel/decel time adjustments. The drive shall have the capability of allowing the DDC to monitor feedback such as process variable feedback, output speed/frequency, current (in amps), percent torque, power (kw), relay outputs, digital inputs and diagnostic warning and fault information. Additionally, remote (LAN) VFD fault reset shall be possible. A minimum of 15 field parameters shall be capable of being monitored. J. Drive Optional Features 1. Optional features shall be furnished and mounted by the drive manufacturer. All optional features shall be UL Listed by the drive manufacturer as a complete assembly and carry a UL508 label. 2. The VFD shall have an optional integrated disconnect switch which has the same footprint as a drive without an integral disconnect switch. 3. The VFD shall be capable of adding additional I/O as required for the system. The additional I/O shall mount in the drive and not require bypass configuration. Up to three (3) optional I/O boards can be included in each drive: a. Six (6) additional programmable digital inputs or outputs. b. Five (5) digital inputs with a relay output. c. Two (2) relay outputs with a thermistor. d. One (1) Analog Input and two (2) analog outputs. e. Three (3) relay outputs. f. One (1) analog output, and one (1) digital output. g. Ni100 Sensor Card. Page 7 of 9

K. Bypass 1. The bypass shall be furnished and mounted by the drive manufacturer as defined on the VFD schedule. All VFD with bypass configurations shall be UL Listed as a complete assembly and carry a UL508 label. 2. A complete factory wired and tested bypass system consisting of a drive output and bypass contactor, along with a mechanical service switch to isolate the drive from the utility power. A door interlocked, padlockable circuit breaker or main disconnect with drive fuses shall be standard. 3. The bypass enclosure door and VFD enclosure must be mechanically interlocked so that the disconnecting device must be in the Off position before either enclosure may be accessed. The VFD and bypass package with a main disconnect, shall have a UL listed short circuit rating (SCCR) of 100,000 Amps, and this rating shall be indicated on the UL data label. 4. Serial communications the bypass shall be capable of being monitored and/or controlled using serial communications. On-board communications protocols shall include Modbus RTU; Modbus TCP; BACnet MS/TP; BACnet IP; FLN (P1); AND Johnson Controls N2. 5. The bypass control shall include a programmable time delay for bypass start to allow motor magnetic fields to dissipate for safe bypass operation, and the keypad shall indicate that this time delay is in process. 6. There shall be a keypad adjustment to select manual or automatic transfer bypass. 7. The digital inputs for the system shall accept 24 Vdc. The bypass shall incorporate an internally sourced power supply and not require an external control power source. 8. There shall be a run permissive circuit for damper or valve control. 9. There shall be a list of conditions which the user can determine when the drive will automatically transfer to bypass operation. 10. Each bypass enclosure shall incorporate a diagnostic board for troubleshooting the bypass components. 11. Electronic bypass systems shall provide override capabilities in the event of electronic bypass controller failure. The drive shall run in bypass and still maintain all safeties. 12. Both Local and Remote bypass control shall be provided. When remote bypass is enabled, the building automation system shall be able to start and stop the motor for such things as night time shut down. 13. The bypass package shall include the ability for the user to enable interlocked start features that will not allow the motor to run in drive hand, drive auto or bypass until a confirming end switch or safety has been closed. 14. User-defined auto bypass feature based on a drive relay shall be included. This will allow the user to have the motor operated in bypass mode when the drive faults or for purposes selected by the user through parameterization. 15. User-defined essential service shall be provided that allows a contact closure to operate the motor at full speed, ignoring all calls to stop. 16. Contactors shall be interlocked to ensure that both the drive output and bypass contactors do not close simultaneously. Page 8 of 9

17. Two safety inputs shall be available for customer connecting. If either of these inputs opens, the electronic bypass will not operate the motor in bypass or drive mode. These inputs are typically used for such things as fire alarm and freeze stat. Part 3 EXECUTION 3.01 Installation A. Installation shall be the responsibility of the mechanical contractor. The contractor shall install the drive in accordance with the recommendations of the VFD manufacturer as outlined in the installation manual. B. The electrical contractor shall complete power wiring. The contractor shall complete all wiring in accordance with the recommendations of the VFD manufacturer as outlined in the installation manual. 3.02 Start-Up A. Certified factory start-up shall be provided for each drive by a factory authorized service center. A certified start-up form shall be filled out for each drive with a copy provided to the owner, and a copy kept on file at the manufacturer. 3.03 Product Support A. Factory-trained application engineering and service personnel that are thoroughly familiar with the BT300 drive products offered will be locally available at both the specifying and installation locations. 3.04 Warranty A. Warranty shall be 18 months from date of manufacture, or 36 months from the date of manufacture with certified start-up. END OF SECTION Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. Product or company names mentioned herein may be the trademarks of their respective owners. 2016 Printed in the USA Building Technologies Division 1000 Deerfield Parkway Page 9 of 9 Buffalo Grove, IL 60089-4513 USA Tel. +1 847-215-1000