nvent SPECTRACOOL N280446G050 Instruction Manual
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nvent SPECTRACOOL N280446G050 Instruction Manual

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SPECTRACOOL
Air Conditioner
n28 Model
INSTRUCTION MANUAL
Rev. A
© 2022 nVent
89215756
P/N 89215756

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Summary of Contents for nvent SPECTRACOOL N280446G050

  • Page 1 SPECTRACOOL Air Conditioner n28 Model INSTRUCTION MANUAL Rev. A © 2022 nVent 89215756 P/N 89215756...

  • Page 2: Table Of Contents

    Symptoms and Possible Causes - Thermostat Version ............................... 41 Basic Air Conditioning Trouble Shooting Check List - Remote Access Control Version ....................42 Symptoms and Possible Causes - Remote Access Control Version ........................... 43 © 2022 nVent 89215756 - 2 -...

  • Page 3: Warranty And Return Policy

    Damage evident upon receipt should be noted on the freight bill. Damage should be brought to the attention of the delivering carrier -- NOT to nVent Equipment Protection -- within 15 days of delivery. Save the carton and packing material and request an inspection. Then file a claim with the delivering carrier.

  • Page 4: For Cooling (75-100 F Range)

    The unit will remain electrified when the door switch is operated with the evaporator fan continuing to operate, and potentially, if temperatures are low enough, the heater may continue to operate on outdoor models. © 2022 nVent 89215756 - 4 -...

  • Page 5: Schematics And Wiring Diagrams For Thermostat Control

    SCHEMATICS AND WIRING DIAGRAMS FOR THERMOSTAT CONTROL GENERIC 115V 1-PHASE SCHEMATIC (ACTUAL UNIT OPTIONS MAY VARY) 89074302 GENERIC 230V 1-PHASE SCHEMATIC (ACTUAL UNIT OPTIONS MAY VARY) © 2022 nVent 89215756 - 5 -...

  • Page 6: Generic 460V 1-Phase Schematic (Actual Unit Options May Vary)

    GENERIC 460V 1-PHASE SCHEMATIC (ACTUAL UNIT OPTIONS MAY VARY) © 2022 nVent 89215756 - 6 -...

  • Page 7: Generic 115V 1-Phase Wire Diagram (Actual Unit Options May Vary)

    WHT41 TO THERMAL BLK40 DISPLAY BRN26 BLK11 BLK27 HEATER BLK28 BLU29 LIMIT SWITCHES BLK14 ENCLOSURE WHT15 ENC. AMB. START CAPACITOR AMBIENT IMPELLER 0.L. BLK12 BLK20 COMPRESSOR 89073631 COMP HTR OR C/E (OPTIONAL) (OPTIONAL) © 2022 nVent 89215756 - 7 -...

  • Page 8: Generic 230V 1-Phase Wire Diagram (Actual Unit Options May Vary)

    GENERIC 230V 1-PHASE WIRE DIAGRAM (ACTUAL UNIT OPTIONS MAY VARY) © 2022 nVent 89215756 - 8 -...

  • Page 9: Generic 460V 1-Phase Wire Diagram (Actual Unit Options May Vary)

    GENERIC 460V 1-PHASE WIRE DIAGRAM (ACTUAL UNIT OPTIONS MAY VARY) © 2022 nVent 89215756 - 9 -...

  • Page 10: Dimensional Drawing

    DIMENSIONAL DRAWING WITH THERMOSTATS 89068456 © 2022 nVent 89215756 - 10 -...

  • Page 11: Installation Instructions

    24 VAC terminal strip by noting the locations on the correct wiring diagram. 8. Set thermostat for required cabinet temperature. Refer to Sequence of Operation on page 4 for thermostat adjustment and operation. Surface Mount Figure 1 Cut-out Drawing © 2022 nVent 89215756 - 11 -...

  • Page 12: Digital Thermostat Controller (Optional)

    Note: nVent Hoffman network card (RAC module) is an optional accessory, therefore, some of the air conditioners ship without the network card but it is upgradable upon request.
  • Page 13 Compressor Running • Steady ON while compressor is running White Evaporator Running White Electric heater ON White Primary and/or lead controller Compressor and Condenser fan OFF White Freeze control while illuminated White Power ON © 2022 nVent 89215756 - 13 -...
  • Page 14 © 2022 nVent 89215756 - 14 -...

  • Page 15: Displaying And Changing Program Settings

    Default value High temperature alarm setpoint 125 F Low temperature alarm setpoint 40 F Door open alarm setting ArOP Alarm relay output NOTES: (4) The alarm relay output logic is designed to be configurable © 2022 nVent 89215756 - 15 -...
  • Page 16 No effect on function setpoint Compressor and condenser fan turns OFF for the duration Frost alarm Evaporator coil freezes of alarm. Alarm clears when Closed the outlet temperature sensor reaches 59 F © 2022 nVent 89215756 - 16 -...

  • Page 17: Displaying Temperature Data On Screen

    This input is associated with the controller display alarm mnemonic dO (door open). To use this feature, remove the splice connector, and connect the two white wires to customer supplied enclosure door switch in its place. Note: do NOT apply power to this dry contact input. © 2022 nVent 89215756 - 17 -...

  • Page 18: Primary-Secondary (Ps) Mode

    7. Best recommendation is to configure the ACU that has Hoffman network card to be the primary one. CONNECTING UNITS TOGETHER IN PRIMARY/SECONDARY MODE Primary - Device ID 1 Secondary - Device ID 2 Secondary - Device ID 3 Secondary - Device ID 10 Figure 3 Primary-secondary network connectivity © 2022 nVent 89215756 - 18 -...

  • Page 19: Connecting Units Together In Lead/Lag Mode

    10. Set parameter H03 (total number of controllers connected) to 1 to 10. CONNECTING UNITS TOGETHER IN LEAD/LAG MODE Lead - Device ID 1 Lag - Device ID 2 Figure 4 Lead-Lag network connectivity © 2022 nVent 89215756 - 19 -...

  • Page 20: Air Conditioner Unit Remote Communication Features

    Air conditioners that include the optional Hoffman network card (RAC module) have remote communication capabilities utilizing SNMP, Modbus TCP, EtherNet/IP, Profinet Protocol via Ethernet connection, and Modbus RTU protocol via USB connection. nVent provides Windows interface application software that is available to download free from nVent support link https://go.nvent.com/remote-access-control-support-center. The Windows interface application software supports both Ethernet and USB communication.

  • Page 21: Using Hoffman Pc Interface Tool

    Enter the new network configuration to Device IP address, Gateway IP, and Trap IP, then click on Reprogram ACU • button to write to the network card. In order to be recognized the new networking configurations in local network, cycle power to the A/C unit is required. • © 2022 nVent 89215756 - 21 -...

  • Page 22: Usb Communication Mode

    Enter the new network configuration to Device IP address, Gateway IP, and Trap IP, then click on Reprogram ACU • button to write to the network card. In order to be recognized the new networking configurations in local network, cycle power to the A/C unit is required. • © 2022 nVent 89215756 - 22 -...

  • Page 23: Ethernet Communication Mode

    Refer to remote access control (RAC) Instruction Manual for configuring multiple units and with text message and email capability in Hoffman A.C. Monitor software. The remote access control Instruction Manual, P/N: 89091002 can be downloaded from nVent support center link, https://go.nvent.com/remote-access-control-support-center.

  • Page 24: Remote Access Control Pin-Out

    INLET TEMP PROBE DOOR OPEN SWITCH WHT63 GROUND RESERVED OUTLET TEMP PROBE RED45 MAL-FUNCTION ALARM BLU88 RESERVED UNIT REMOTE ON/OFF RESERVED RESERVED GROUND RESERVED DATA (-) DATA (+) GROUND DATA (-) DATA (+) GROUND © 2022 nVent 89215756 - 24 -...

  • Page 25: Schematics And Wiring Diagrams For Remote Access Control

    SCHEMATICS AND WIRING DIAGRAMS FOR REMOTE ACCESS CONTROL GENERIC 115V 1-PHASE SCHEMATIC (ACTUAL UNIT OPTIONS MAY VARY) 89204550 REV. B GENERIC 230V 1-PHASE SCHEMATIC (ACTUAL UNIT OPTIONS MAY VARY) 89214186 REV. A © 2022 nVent 89215756 - 25 -...

  • Page 26: Generic 460V 1-Phase Schematic (Actual Unit Options May Vary)

    GENERIC 460V 1-PHASE SCHEMATIC (ACTUAL UNIT OPTIONS MAY VARY) 89214187 REV. A © 2022 nVent 89215756 - 26 -...

  • Page 27: Generic 115V 1-Phase Wire Diagram For Remote Access Control (Actual Unit Options May Vary)

    GENERIC 115V 1-PHASE WIRE DIAGRAM FOR REMOTE ACCESS CONTROL (ACTUAL UNIT OPTIONS MAY VARY) 89214142 REV.A © 2022 nVent 89215756 - 27 -...

  • Page 28: Generic 230V 1-Phase Wire Diagram For Remote Access Control (Actual Unit Options May Vary)

    GENERIC 230V 1-PHASE WIRE DIAGRAM FOR REMOTE ACCESS CONTROL (ACTUAL UNIT OPTIONS MAY VARY) 89214147 REV.A © 2022 nVent 89215756 - 28 -...

  • Page 29: Generic 460V 1-Phase Wire Diagram For Remote Access Control (Actual Unit Options May Vary)

    GENERIC 460V 1-PHASE WIRE DIAGRAM FOR REMOTE ACCESS CONTROL (ACTUAL UNIT OPTIONS MAY VARY) 89214150 REV.A © 2022 nVent 89215756 - 29 -...

  • Page 30: Dimensional Drawing

    DIMENSIONAL DRAWING WITH REMOTE ACCESS CONTROL 89082927 © 2022 nVent 89215756 - 30 -...

  • Page 31: Installation Instructions With Remote Access Control

    Electrical circuit should be fused with slow blow or HACR circuit breaker. 6. Set controller setpoints for required cabinet temperature. Refer to DISPLAYING AND CHANGING PROGRAM Settings on page 15 for setpoint adjustment and operation. Surface Mount Figure 5 Cut-out Drawing © 2022 nVent 89215756 - 31 -...

  • Page 32: Maintenance

    1. Flush the filter with warm water from the exhaust side to the intake side. DO NOT USE CAUSTICS. 2. After flushing, allow filter to drain. Placing it with a corner down will assure complete drainage. © 2022 nVent 89215756...

  • Page 33: Condenser And Evaporator Air Movers

    CAUTION Operation of the air conditioner in areas containing airborne caustics or chemicals can rapidly deteriorate filters, condenser coils, blowers and motors, etc. Contact nVent Equipment Protection for special recommendations. REFRIGERANT LOSS Each air conditioner is thoroughly tested prior to leaving the factory to insure against refrigeration leaks. Shipping damage or microscopic leaks not found with sensitive electronic refrigerant leak detection equipment during manufacture may require repair or recharging of the system.

  • Page 34: Unit Characteristics

    Evaporator Unit Amps(A) In(°F) Delta(°F) Delta(°F) 65-80 7-7.4 15-22 13-28 N280416GXXX 80-100 7.4-8.6 21-25 14-24 65-80 3.1-3.7 17-25 15-27 N280426GXXX 80-100 3.4-4.1 19-29 14-31 65-80 1.5-1.9 17-25 15-27 N280446GXXX 80-100 1.7-2.1 19-29 14-31 © 2022 nVent 89215756 - 34 -...

  • Page 35: Service Data

    Capillary Tube 99054039SP 99064045SP 99064045SP Thermostat, SPDT, 55-100F 10106116SP 10106116SP 10106116SP Transformer, Input Power 101006111SP Overload 89114723SP 89114724SP 89114724SP Controller, Basic 89202719SP Thermistor 89075654SP Bridge Rectifier 89087424SP Communication Board 89145457SP 315 mA Fuse 89085115SP © 2022 nVent 89215756 - 35 -...

  • Page 36: N280416Gxxx Pressure Tables

    N280416GXXX PRESSURE TABLES N280416GXXX 50hz L=SUCTION (± 5PSIG); H=HEAD (-10/+20PSIG) ENCLOSURE TEMPERATURE (°F) °F N280416GXXX 60hz L=SUCTION (± 5PSIG); H=HEAD (-10/+20PSIG) ENCLOSURE TEMPERATURE (°F) °F © 2022 nVent 89215756 - 36 -...

  • Page 37: N280426Gxxx Pressure Tables

    N280426GXXX PRESSURE TABLES N280426GXXX 50hz L=SUCTION (± 5PSIG); H=HEAD (-10/+20PSIG) ENCLOSURE TEMPERATURE (°F) °F N280426GXXX 60hz L=SUCTION (± 5PSIG); H=HEAD (-10/+20PSIG) ENCLOSURE TEMPERATURE (°F) °F © 2022 nVent 89215756 - 37 -...

  • Page 38: N280446Gxxx Pressure Tables

    Factory Charge 283 Grams 312 Grams Füllmenge durch Hersteller 283 Gramm 312 Gramm Opłata Fabryczna 283 Gramów 312 Gramów Equivalent 0.40 Tons 0.45 Tons Equivalent 0,40 Tonnen 0,45 Tonnen Ekwilalent 0,40Tony 0,45 Tony © 2022 nVent 89215756 - 38 -...
  • Page 39 NOTES © 2022 nVent 89215756 - 39 -...

  • Page 40: Trouble Shooting

    (replace upper access panel for safety). This will activate the switch in the thermostat. Turn the power on and if all impellers and the compressor come on, the thermostat needs to be replaced. © 2022 nVent 89215756 - 40 -...

  • Page 41: Symptoms And Possible Causes - Thermostat Version

    Unit blows breakers Short in system Drain plugged Drain tube kinked Getting water in enclosure Enclosure not sealed (allowing humidity in) Mounting gasket damaged For additional technical support, contact nVent Equipment Protection at 800-896-2665. © 2022 nVent 89215756 - 41 -...

  • Page 42: Basic Air Conditioning Trouble Shooting Check List - Remote Access Control Version

    6. The compressor and the condenser (Ambient or “HOT” air) impeller(s) should turn on. Is there adequate airflow? YES, proceed to step 7. NO, possible problem: » Open motor winding(s) » Stuck impeller(s) Repair or Replace defective part » Obstructed wheel(s) » Defective motor capacitor(s) © 2022 nVent 89215756 - 42 -...

  • Page 43: Symptoms And Possible Causes - Remote Access Control Version

    Unit blows breakers Short in system Drain plugged Drain tube kinked Getting water in enclosure Enclosure not sealed (allowing humidity in) Mounting gasket damaged For additional technical support, contact nVent Equipment Protection at 800-896-2665. © 2022 nVent 89215756 - 43 -...
  • Page 44 Rev. A © 2022 nVent 89215756 P/N 89215756...

This manual is also suitable for:

Spectracool n28

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