nvent SpectraCool G280648G Series Instruction Manual
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nvent SpectraCool G280648G Series Instruction Manual

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SpectraCool
Air Conditioner
G28 48 VdC Model
INSTRUCTION MANUAL
Rev. A
© 2022 nVent
P/N 89216438
89216438

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Summary of Contents for nvent SpectraCool G280648G Series

  • Page 1 SpectraCool Air Conditioner G28 48 VdC Model INSTRUCTION MANUAL Rev. A © 2022 nVent P/N 89216438 89216438...

  • Page 2: Table Of Contents

    F-GAS INFORMATION ..................................27 NOTE: Some of the information in this manual may not apply if a special unit was ordered. If additional drawings for a special unit are necessary, they have been inserted. Contact nVent Equipment Protection if further information is required.

  • Page 3: Handling & Testing The Air Conditioner

    Save the packing material and request an inspection. Then file a claim with the delivering carrier within 15 days of delivery. nVent Equipment Protection cannot accept responsibility for freight damages; however, we will assist you in any way possible.

  • Page 4: Installation Instructions

    5. Refer to the nameplate for electrical requirements. Wire the unit to a properly grounded power supply. Electrical circuit should be fused with slow blow or HACR circuit breaker. 6. Set thermostat for required cabinet temperature. Refer to on page 6 for thermostat adjustment & operation. DIMENSIONAL DRAWING © 2022 nVent 89216438 - 4 -...
  • Page 5 28-1000-13 SURFACE MOUNT Figure 1 Cutout Dimensions © 2022 nVent 89216438 - 5 -...

  • Page 6: Technical Information

    86.7 -26.1 29.4 -23.3 32.2 -20.6 113.3 -17.8 37.8 40.6 -12.2 43.3 146.7 -9.4 46.1 157.5 -6.7 18.5 48.9 -3.9 51.7 -1.1 54.4 197.5 57.2 213.3 62.8 246.7 45.5 65.6 263.8 12.8 51.5 © 2022 nVent 89216438 - 6 -...

  • Page 7: Performance Data

    External Airflow (CFM) Variable, 300 max Hose discharge/Optional Condensate Management powered C/E Electrical Data Rated Voltage (VDC) Rated Frequency Voltage Range 39-57 Cooling Amps at Max Conditions 17.7 Evaporator Fan RLA Condenser Fan RLA © 2022 nVent 89216438 - 7 -...

  • Page 8: Wire Diagrams

    4.25 WIRE DIAGRAMS G280648GXXX GENERIC WIRE DIAGRAM (ACTUAL UNIT OPTIONS MAY VARY) 89216429 REV.A OPRIETARY AND CONFIDENTIAL © 2022 nVent 89216438 - 8 - ATION CONTAINED IN THIS DRAWING IS THE NOTES: OPERTY OF HOFFMAN ENCLOSURES INC.

  • Page 9: Maintenance

    The condenser blower is mounted on its own bulkhead and is easily accessible by removing the front cover. 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 for special recommendations. © 2022 nVent 89216438...

  • Page 10: Refrigerant Loss

    Filter, Air, Reusable 89119662 Filter/Dryer 52-6028-00 Heater, Compressor or Condenser Pan (optional) 10-1030-08 Thermistor 89075654 Impeller, Condenser 89102441 Impeller, Evaporator 89102440 Condenser Impeller Controller 89122338 Relay, Compressor 10-1005-22 Optional Communication Board 89145457 Fuse, Controller 89085114 © 2022 nVent 89216438 - 10 -...

  • Page 11: Electronic Controlling Section

    CONTROLLER STATUS INDICATION The display has numerous symbols to indicate the various controller functions such as cooling, heating, alarming, evaporator fan, and heating. Indicators (icons) are steady illuminated on screen when active. Figure 1: Display © 2022 nVent 89216438 - 11 -...

  • Page 12: Keypad

    Flashing while waiting for compressor to turn ON • Steady ON while White Evaporator Running White Electric heater ON White Primary and/or lead controller White Freeze control Compressor and Condenser fan OFF while illuminated White Power ON © 2022 nVent 89216438 - 12 -...
  • Page 13 © 2022 nVent 89216438 - 13 -...

  • Page 14: 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: The alarm relay output logic is designed to be configurable © 2022 nVent 89216438 - 14 -...

  • Page 15: Real-Time-Clock Setting

    ESC, then press button to return to the main screen or if no action for longer than 60 seconds the screen will be automatically revert to the main screen. NOTE: If no alarms are present then only ESC will be displayed in the folder. © 2022 nVent 89216438 - 15 -...

  • Page 16: To Reset The Alarms In Alarm History Folder

    LOG Out, then press button to return to the main screen or if no action for longer than 60 seconds the screen will be automatically reverted to the main screen. © 2022 nVent 89216438 - 16 -...

  • Page 17: To Reset Parameters To Factory Default

    Parameter C21 controls the alarm relay output logic and can be accessed through security code “0022” in the PArF folder. Para Description Configuration Alarm relay output logic 0 = normally open (NO) – factory default 1 = normally closed (NC)   © 2022 nVent 89216438 - 17 -...

  • Page 18: Alarm Input Connection

    6. All temperature setpoints and alarms can be viewed remotely if one of the ACUs is equiped with Hoffman network card (RAC module). 7. Best recommendation is to configure the ACU that has Hoffman network card to be the primary one © 2022 nVent 89216438 - 18 -...

  • Page 19: Connecting Units Together In Primary/Secondary Mode

    PS (primary-secondary) PS (primary-secondary) LL (lead-lag) Device ID 1 up to 10 1 up to H03 Total number of the units in 1 up to 10 2 up to 10 the group network © 2022 nVent 89216438 - 19 -...

  • Page 20: Lead-Lag (Ll) Mode

    The two air conditioners will take turns being the lead and lag. Alternating can be done in time based or every cooling cycle and is configured with H14. CONNECTING UNITS TOGETHER IN LEAD/LAG MODE Lead - Device ID 1 Lag - Device ID 2 Figure 3: Lead-Lag network connectivity © 2022 nVent 89216438 - 20 -...
  • Page 21 Set parameter H14 (LL strategy selection) to 0 to 250. This is the run time in hours before ACU1 and ACU2 will alternate being the lead unit. When set to zero ACU1 and ACU2 will automatically alternate every cycle. © 2022 nVent 89216438...

  • Page 22: 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 23: 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 89216438 - 23 -...
  • Page 24 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 25 INLET TEMP PROBE DOOR OPEN SWITCH WHT63 GROUND RESERVED OUTLET TEMP PROBE RED45 MAL-FUNCTION BLU88 ALARM RESERVED UNIT REMOTE ON/ RESERVED RESERVED GROUND RESERVED DATA (-) DATA (+) GROUND DATA (-) DATA (+) GROUND © 2022 nVent 89216438 - 25 -...

  • Page 26: Trouble Shooting

    7. Make sure the coils are clean. Then check evaporator “air in” and “air out” temperatures. If the temperatures are the same: • Possible loss of refrigerant Repair or Replace • Possible bad valves in the defective part compressor © 2022 nVent 89216438 - 26 -...

  • Page 27: Symptoms And Possible Causes

    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. F-GAS INFORMATION G280648GXXX Refrigerant Kühlmittel R134a Chłodziwo...
  • Page 28 NOTES © 2022 nVent 89216438 - 28 -...
  • Page 29 NOTES © 2022 nVent 89216438 - 29 -...
  • Page 30 Rev. A © 2022 nVent P/N 89216438 89216438...

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