BAC NEXUS NXF-0403N-CS2TS-H1 User Manual Download

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OPERATION & MAINTENANCE MANUAL

Summary of Contents for NEXUS NXF-0403N-CS2TS-H1

Page 1: ...OPERATION MAINTENANCE MANUAL...

Page 2: ...id make up valve mechanical make up valve and drain valve Check and adjust water level in the spray water basin Check operation of pump s Inspect and clean conductivity sensor 2 Check basin heater and...

Page 3: ...ogy 21 EC Fan System 22 DiamondClear Design 26 iPilot Control System 30 Optional UV System PART 4 Corrosion Protection 34 Water Treatment 35 Corrosion and Scale Control 36 Chemical Treatment Requireme...

Page 4: ...dangerous UV radiation UV radiation may even in little doses cause harm to the eyes and skin CAUTION The operation maintenance and repair of this equipment shall be undertaken only by personnel autho...

Page 5: ...The unit should be located such that unusual quantities of industrial smoke chemical fumes salt or heavy dust do not enter the equipment Such airborne impurities entering into the equipment and absorb...

Page 6: ...WWW BALTIMOREAIRCOIL COM 4 Figure 1 Nexus Modular Hybrid Cooler NEXUS MODULAR HYBRID COOLER Start Up Operation 1 1 2 3 11 12 20 21 4 5 6 7 8 9 10 14 17...

Page 7: ...Water Distribution System Evenly wets the hCore Heat Transfer Technology for optimal thermal performance and reliability 13 Water Diverter Creates water turbulence in basin to minimize maintenance 14...

Page 8: ...uildup and diminished operation Before starting the system the first time flush the make up supply water piping to the unit for at least 5 minutes ensuring that the make up and drain valves are free o...

Page 9: ...nections Inspect process fluid manifold piping and connections Thoroughly inspect the fan s and pump s for any mechanical or physical damage Verify that fan s rotates freely Inspect solenoid valves ma...

Page 10: ...pray pump water flow reduced thermal performance and possible excessive scale buildup Verify that fan s are rotating in the correct direction clockwise when looking into the unit from the outside by o...

Page 11: ...cts by others see wiring diagram for details Navigate to User Menu and press enter For Local Control without a Building Management System BMS Interface Start Up Operation Start Up Pre Start up Checks...

Page 12: ...f operation under thermal load perform the following services 9 9 Check the unit for any unusual noises or vibrations 9 9 Check the operating water level in the cold water basins 9 9 Adjust the mechan...

Page 13: ...s to achieve the right balance of both Your climate cooling load profile and the rates you pay for water and energy will determine your specific settings which can easily be re adjusted as needed You...

Page 14: ...months Spray Water Basin and Pump Water Control Verify that incoming water pressure is between 20 and 75 psig When the iPilot Control System calls for evaporative cooling the solenoid make up valve w...

Page 15: ...ing methods The included temperature sensor at the outlet of the hCore Heat Transfer Technology is a negative temperature coefficient NTC sensor and sends a signal to the controller in the iPilot Cont...

Page 16: ...propylene glycol solution When the use of glycol is not practical the system must be designed to meet both minimum flow and minimum temperature requirements See Table 1 for hCore Heat Transfer Technol...

Page 17: ...0603N CS2TS J1 39 36 86 654 31 244 NXF 0603N CS2TS J2 78 72 170 307 60 537 NXF 0603N CS2TS J3 117 108 250 992 87 955 NXF 0603N CS2TS J4 156 144 328 749 113 578 NXF 0603N CS2TS J5 165 180 403 623 137...

Page 18: ...w freezing Further protection against hCore Heat Transfer Technology freeze up is possible with the installation of an alarm to alert personnel when the temperature of the fluid leaving the section fa...

Page 19: ...not possible the motor must be covered with a loose fitting tarpaulin Do not use plastic plastic film This cover should extend below the motor and be secured however it should not tightly wrap the mo...

Page 20: ...nspected and cleaned to restore them to pre storage condition Reinstall all components panels and drain plugs as applicable and remove all protective coverings For units stored prior to installation c...

Page 21: ...up water piping Heat trace and insulate all exposed piping To protect from freezing and to minimize the risk of biological contamination during shutdown drain the spray water basin Clean all debris s...

Page 22: ...ology Figure 13 hCore Heat Transfer Technology Draining Vent By Others Drain By Others Quarterly inspect the surface and use garden hose to spray water from the top to clear any obstructions For instr...

Page 23: ...ration persists shut the unit down and correct the cause before continuing operation Figure 14 Swing Out EC Fan System Quarterly check for vibration and tighten external fasteners as necessary For int...

Page 24: ...5 8 NXF 0603 x 8 1 2 4 1 8 Table 2 Cold Water Basin Water Levels Measured from Inside the Cold Water Basin DiamondClear Design The DiamondClear Design is a water management system which provides conti...

Page 25: ...actuates the main diaphragm to open the float valve The float that controls the spray water basin operating water level can be adjusted by loosening the thumbscrew and extending or shortening the flo...

Page 26: ...t spray pump remains clean and free of dirt or debris buildup on the inlet strainer Figure 20 Spray Pump Basin Heaters Optional Annually ensure that basin heater s remain clean and remove debris build...

Page 27: ...and Nozzles Water is distributed through a corrosion resistant polyvinyl chloride PVC water distribution system optional steel distribution is available Inspect the spray branches and nozzles quarter...

Page 28: ...that the fans and pump motors are disconnected locked out and tagged out Positive Closure Dampers PCDs Optional Ensure that the dampers remain open while the unit run state is active and that they clo...

Page 29: ...ation excessive noise or leakage will indicate that cleaning is required The valve is normally closed but faulty valve operation may cause it to fail either open or closed Clean strainer at supply by...

Page 30: ...isopropyl alcohol cleaner may help remove oils A mild acid such as white vinegar will help to remove calcium scale A fine grit abrasive cloth can also be used to remove scale though harsh abrasives s...

Page 31: ...y may ask for the software version To provide them with the information follow these steps from the control panel screen refer to the iPilot Control System Appendix on page 45 Press Prg Scroll up down...

Page 32: ...the water circulation pump remains clean and free of dirt or debris When disassembling any component of the UV system the power to the system must be disconnected and the Nexus basin must be fully dra...

Page 33: ...is operating correctly by resuming normal unit operation Alarms will notify the user within 1 minute if there is a UV intensity or pump operation issue o If UV intensity or UV pumps alarms are activa...

Page 34: ...base together until an audible click is heard Replace the UV system enclosure Open the ball valve in the UV System suction line Verify the UV system is operating correctly by resuming normal unit oper...

Page 35: ...ght reaching the sensor thereby giving a false indication of lower disinfection performance When disassembling any component of the UV system the power to the system must be disconnected and the Nexus...

Page 36: ...necessary Water Treatment A proper water treatment program administered under the supervision of a competent water treatment specialist is an essential part of routine maintenance to ensure the safe o...

Page 37: ...inless Steel hCore Heat Transfer Technology Stainless Alloy pH 6 5 to 9 2 1 6 5 to 9 2 1 6 5 to 9 5 1 Total Suspended Solids 25 ppm 25 ppm 25 ppm Total Dissolved Solids TDS 2 050 ppm 2 050 ppm 2 500 p...

Page 38: ...ther Thermosetting Polymer and or stainless steel there are no exposed galvanized surfaces so passivation is not required Biological Control The warm oxygen and nutrient rich environment inside evapor...

Page 39: ...mium oxide surface layer also called the passivation layer that provides the corrosion resistance in stainless steel BAC s Manufacturing Process BAC takes precautions to prevent cross contamination pr...

Page 40: ...ite products may be used where aesthetic considerations are not important followed by solvent cleaning with organic solvents as described above It is important to rinse the surface with warm water and...

Page 41: ...locked out and the swing out fan access door s should be opened such that the fan assembly ies is are not exposed to any cleaning solution mist that may penetrate through the water diverter system Do...

Page 42: ...nductivity controlled blowdown system consists of a conductivity sensor and a drain valve Refer to page 28 for conductivity sensor cleaning instructions The iPilot Control System will open the motoriz...

Page 43: ...e n Number of Cycles of Concentration CR CM CR Concentration in Recirculating Water CM Concentration in Make up Water Given Nexus Modular Hybrid Cooler Process Fluid Flow Rate 300 USGPM Maximum Allowa...

Page 44: ...the heaters whenever the basin water temperature is above 45 F 7 2 C or whenever the sensor probe is not fully submersed The control panel enclosure is suitable for outdoor use The control system util...

Page 45: ...econnect sensor wires per the wiring diagram to terminals T1 and T2 replace the cover and place the system back in service Operation when the sensor probe is encased in ice Disconnect the heater contr...

Page 46: ...d at which this occurs as the lower end of the lockout range Also record the vibration level at this speed Adjust the fan speed for fan motors simultaneously and monitor the vibration levels If the vi...

Page 47: ...t the actuator linkages are tight and the dampers are opening and closing Refer to Positive Closure Dampers PCDs on page 14 for more details Ensure the dampers are functioning properly When the unit r...

Page 48: ...resentative Fan Does Not Respond to the Control Signal Communications Fault Ensure the communications cable is connected to the controller on port J26 Ensure the communications cable is not cut or dam...

Page 49: ...is at the desired value Ensure that the system is not in manual mode and OSV out of status value status for all the components is NO Refer to the iPilot Control System Appendix on page 45 for more det...

Page 50: ...Water Low Level Alarm Al_AmbientTempLow Auto reset Positive Ambient Temp Low Notification Al_ColdWeatherActive Auto reset Positive Cold Weather program Activated Notification Al_LvgWaterTempHigh Auto...

Page 51: ...9 WWW BALTIMOREAIRCOIL COM 49 NEXUS MODULAR HYBRID COOLER Appendix iPilot Control System a Menus The following information describes how to adjust settings within the user interface Main Menu Screen F...

Page 52: ...larm This button illuminates red when an alarm is present and pressing the button will display the alarm description Prg Displays all the main submenus Esc Brings the menu back to the previous screen...

Page 53: ...tem Menus Main Menu Screen User Menu Points Overview System Information Clock Menu Alarm Logs Alarm Logs System alarm and warning information can be retrieved Clock Menu This is to setup system time d...

Page 54: ...The standard password for the Owner menu is 0000 Point Overview V Troubleshoot wiring and components in Manual Mode Pump s Fan s High low level switch status Drain make up electronic valve Alarm expo...

Page 55: ...ver Fan Speed Energy Saver mode Controls signal Water Saver Fan Speed Water Saver Mode Local Enable Disable Status of the remote start stop dry contact between terminals 21A and 23 BUS En Dis Status o...

Page 56: ...ater and energy savings can be optimized from Dry to Wet with 1 corresponding to maximum energy savings and 7 corresponding to maximum water savings Water Saver Mode is further divided in to two categ...

Page 57: ...creen Ref Screen Description E05 BMS Communication Enable disable and define communication type Choose Comm Type None Modbus RTU Modbus IP BACnet MSTP BACnet IP BMS On Off Control No Yes Configure opt...

Page 58: ...he EC fan emergency mode is disabled the fan s will continue to operate at the last known fan speed Emergen mode ON or OFF Enable or disable the EC fan mode Mode Timeout time delay before the EC fan e...

Page 59: ...system is live not in manual mode this should show ON V05 Drain and make up testing in manual mode Read Write OSV Out of status value manual mode To test heater and corresponding wiring turn ON the O...

Page 60: ...e screen Once the testing is done switch of the Fan by entering 0 speed In live or Manual Mode follow system component s safety protocols V11 This screen is set in the factory and locked V12 This scre...

Page 61: ...creen Description C01 Format Change the Date format Date 00 00 00 Hour 00 00 00 Day Day C02 Current Current Time Zone New Time Zone 00 00 00 Update Time Zone Yes No Clock Menu C The screens in the Clo...

Page 62: ...led on the common discharge from all modules Control Signal for Customer Input Control Method Optional The optional control signal should be wired to terminals per your submittal using one of the foll...

Page 63: ...Energy Saver Mode Water Saver Mode Fan Speed 1 12 ActlFanSpeedInfo 1 12 30911 30934 1507 1518 REAL Read rpm 2 Registers each Fan Power 1 12 EBMpapstFan_x_Mng BMSCurrentPower 30951 30974 1521 1532 REAL...

Page 64: ...eed Limit BMS_WMTimeBleedLmt 40914 1703 UINT Read Write Min Duration of time based bleed Water management Time Drain BMS_WMTimeDrain 40915 1704 UINT Read Write Hrs Frequency of time based drain BMS Un...

Page 65: ...oo high Water Low Level Alarm Al_WaterLowLvl Active 10346 1246 BOOL Read Water level is too low Cold Weather Active Alarm Al_ColdWeatherActive Active 10348 1248 BOOL Read Equipment has switched to dry...

Page 66: ...WERS ICE THERMAL STORAGE EVAPORATIVE CONDENSERS HYBRID PRODUCTS PARTS SERVICES w w w B a l t i m o r e A i r c o i l c o m 7600 Dorsey Run Road Jessup MD 20794 Telephone 410 799 6200 Fax 410 799 6416...

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