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INDIAN RIVER COUNTY JULY 25, 2014 <br />INTERGENERATIONAL RECREATION CENTER 100% CONSTRUCTION DOCUMENTS <br />source. The bypass power board shall supply 250 ma of 24 VDC for use by others to <br />power external devices. <br />14. There shall be a run permissive circuit for damper or valve control. Regardless of the <br />source of a run command (keypad command, time -clock control, digital input, or serial <br />communications) the bypass shall provide a dry contact closure that will signal the <br />damper to open (motor does not operate). When the damper is fully open, a normally <br />open dry contact (end -switch) shall close. The closed end -switch is wired to a bypass <br />system input and allows motor operation. Up to four separate safety interlock inputs shall <br />be provided. When any safety is opened, the motor shall be commanded to coast to <br />stop, and the damper shall be commanded to close. This feature will also operate in <br />Fireman's override / smoke control mode. <br />15. The bypass control shall monitor the status of the VFD and bypass contactors and <br />indicate when there is a welded contactor contact or open contactor coil. This failed <br />contactor condition shall be indicated on the bypass LCD display, programmed to fire a <br />Form -C relay output, and / or over the serial communications protocol. <br />16. The bypass control shall include a programmable time delay for bypass start and keypad <br />indication that this time delay is in process. A Form C relay output provides a contact <br />closure to signal the VAV boxes open. This will allow VAV boxes to be driven open <br />before the motor operates at full speed in the bypass mode. The time delay shall be field <br />programmable from 0 —120 seconds. <br />17. There shall be a keypad adjustment to select manual or automatic transfer bypass. The <br />user shall be able to select via keypad programming which drive faults will result in an <br />automatic transfer to the bypass mode and which faults require a manual transfer to <br />bypass. The user may select whether the system shall automatically transfer from drive <br />to bypass mode on the following drive fault conditions: <br />a. Over current <br />b. Over voltage <br />c. Under voltage <br />d. Loss of analog input <br />18. The following operators shall be provided: <br />a. Bypass Hand -Off -Auto <br />b. Drive mode selector <br />c. Bypass mode selector <br />d. Bypass fault reset <br />19. The bypass shall include a two line, 20 character LCD display. The display shall allow <br />the user to access and view: <br />a. Energy savings — in US dollars <br />b. Bypass motor amps <br />c. Bypass input voltage— average and individual phase voltage <br />d. Bypass power (kW) <br />e. Bypass faults and fault logs <br />f. Bypass warnings <br />g. Bypass operating time (resettable) <br />h. Bypass energy (kilowatt hours — resettable) <br />I/O status <br />j. Parameter settings / programming <br />k. Printed circuit board temperature <br />20. The following indicating lights (LED type) or keypad display indications shall be provided. <br />A test mode or push to test feature shall be provided. <br />a. Power -on (Ready) <br />b. Run enable <br />c. Drive mode selected <br />d. Bypass mode selected <br />e. Drive running <br />f. Bypass running <br />g. Drive fault <br />h. Bypass fault <br />VARIABLE FREQUENCY MOTOR CONTROLLERS 230514 - 10 <br />