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Summary of Contents for nVent Hoffman Spectracool G28
- Page 1 We connect and protect Spectracool Air Conditioner G28 Model Instruction Manual R513A P/N 89246226 Rev. A...
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Page 2: Table Of Contents
TABLE OF CONTENTS Warranty And Return Policy ..................................3 General Safety Instructions ..................................4 Receiving The Air Conditioner ..................................4 Handling And Testing The Air Conditioner ..............................4 How To Read Model Numbers ..................................4 Installation Instructions ....................................5 Dimension Drawings ....................................6 4000 BTU 115 V with Thermostats ..................................6 6000 and 4000 BTU 230 V with Thermostats .............................. -
Page 3: Warranty And Return Policy
Ethernet communication .....................................34 Both Ethernet and USB communication allow the ability to: ........................34 Software and configuration file downloads ............................35 Using nVent HOFFMAN PC Interface Tool ..............................35 USB communication mode ....................................35 To view the controller data information from the A/C unit ......................35 To change the temperature settings to the controller ........................35... -
Page 4: General Safety Instructions
GENERAL SAFETY INSTRUCTIONS Observe the following general safety instructions for installation and operation of this product: • This appliance is for installation only in locations not accessible to the general public. • This appliance is not intended for use by persons, including children, with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning the use of the appliance by a person responsible for their safety. -
Page 5: Installation Instructions
INSTALLATION INSTRUCTIONS 1. Inspect the air conditioner and verify correct functionality before mounting the air conditioner. See HANDLING AND TESTING THE AIR CONDITIONER on page 4. 2. Using the cutout dimensions shown on page 8, prepare the air “IN” and air “OUT” openings, and mounting bolt hole pattern for the enclosure. -
Page 6: Dimension Drawings
DIMENSION DRAWINGS 4000 BTU 115 V with Thermostats 15.05 .65(2) 11.18 .57 (5) 15.87 (5) 14.20 COOLING/HEATING 7.55 THERMOSTATS 17.01 1.26 4.75 POWER INLET WARM AIR OUT ENCLOSURE 5.13 AIR IN 6.50(2) 11.38 10.83 19.28 6.50(2) REMOVABLE 28.59 HANGING TABS AMBIENT 6.13 (2) 6.30... -
Page 7: G28 Generic 460 V With Thermostats
G28 Generic 460 V with Thermostats 15.05 382.2 .65 (2) 16.6 10.18 258.6 15.87 14.5 403.1 14.20 1.26 17.01 360.6 32.1 432.1 7.55 191.8 COOLING THERMOSTAT 4.64 23.2 117.7 WARM AIR OUT ENCLOSURE 5.13 6.50 AIR IN 165.1 130.2 10.83 11.38 288.9 6.50... -
Page 8: 4000 And 6000 Btu 230 V With Remote Access Control
4000 and 6000 BTU 230 V with Remote Access Control nVent.com/HOFFMAN... -
Page 9: Mounting Cutout Dimensions
MOUNTING CUTOUT DIMENSIONS 89059115 28100013 Surface Mount Partial Recess Mount Note: Mounting Gasket adheres to Air Conditioner. nVent.com/HOFFMAN... -
Page 10: Wire Diagrams And Schematics
WIRE DIAGRAMS AND SCHEMATICS 4000 BTU 1-Phase with Thermostat Control Wire Diagram (actual unit options may vary) 50/60 Hz 89077284 REV E nVent.com/HOFFMAN... -
Page 11: 4000 Btu 1-Phase With Thermostat Control Schematic (Actual Unit Options May Vary)
4000 BTU 1-Phase with Thermostat Control Schematic (actual unit options may vary) REV B Note: For voltage, hertz, and options not shown in this manual, refer to the wiring diagram attached to the unit. nVent.com/HOFFMAN... -
Page 12: 6000 Btu 1-Phase With Thermostat Control Wire Diagram (Actual Unit Options May Vary)
6000 BTU 1-Phase with Thermostat Control Wire Diagram (actual unit options may vary) 50/60 Hz 89081439 REV D nVent.com/HOFFMAN... -
Page 13: 6000 Btu 1-Phase With Thermostat Control Schematic (Actual Unit Options May Vary)
6000 BTU 1-Phase with Thermostat Control Schematic (actual unit options may vary) REV B Note: For voltage, hertz, and options not shown in this manual, refer to the wiring diagram attached to the unit. nVent.com/HOFFMAN... -
Page 14: G28 Generic 3-Phase With Thermostat Control Wire Diagram (Actual Unit Options May Vary)
G28 Generic 3-Phase with Thermostat Control Wire Diagram (actual unit options may vary) 50/60 HZ 89098666 REV H nVent.com/HOFFMAN... -
Page 15: G28 Generic 3-Phase With Thermostat Control Schematic (Actual Unit Options May Vary)
G28 Generic 3-Phase with Thermostat Control Schematic (actual unit options may vary) REV D Note: For voltage, hertz, and options not shown in this manual, refer to the wiring diagram attached to the unit. nVent.com/HOFFMAN... -
Page 16: 4000 Btu 115 V 1-Phase With Remote Access Control Wire Diagram (Actual Unit Options May Vary)
4000 BTU 115 V 1-Phase with Remote Access Control Wire Diagram (actual unit options may vary) 50/60 HZ 89204539 REV. E nVent.com/HOFFMAN... -
Page 17: 4000 Btu 115 V 1-Phase With Remote Access Control Schematic (Actual Unit Options May Vary)
4000 BTU 115 V 1-Phase with Remote Access Control Schematic (actual unit options may vary) 89204550 REV. C Note: For voltage, hertz, and options not shown in this manual, refer to the wiring diagram attached to the unit. nVent.com/HOFFMAN... -
Page 18: 4000 Btu 230 V And 6000 Btu 115 V/230 V 1-Phase Wire Diagram (Actual Unit Options May Vary)
4000 BTU 230 V and 6000 BTU 115 V/230 V 1-Phase Wire Diagram (actual unit options may vary) 50/60 Hz 89204202 REV. E nVent.com/HOFFMAN... -
Page 19: 4000 Btu 230 V And 6000 Btu 115 V/230 V 1-Phase Schematic (Actual Unit Options May Vary)
4000 BTU 230 V and 6000 BTU 115 V/230 V 1-Phase Schematic (actual unit options may vary) 89204317 REV. D Note: For voltage, hertz, and options not shown in this manual, refer to the wiring diagram attached to the unit. nVent.com/HOFFMAN... -
Page 20: G28 Generic 3-Phase With Remote Access Control Wire Diagram (Actual Unit Options May Vary)
G28 Generic 3-Phase with Remote Access Control Wire Diagram (actual unit options may vary) 50/60 HZ 89204830 REV. E nVent.com/HOFFMAN... -
Page 21: G28 Generic 3-Phase With Remote Access Control Schematic (Actual Unit Options May Vary)
G28 Generic 3-Phase with Remote Access Control Schematic (actual unit options may vary) 89204833 REV. C Note: For voltage, hertz, and options not shown in this manual, refer to the wiring diagram attached to the unit. nVent.com/HOFFMAN... -
Page 22: Component List
COMPONENT LIST G280416GXXX G280426GXXX G280446GXXX 115 V 1-Phase 230 V 1-Phase 460 V 1-Phase 50/60 Hz 4000 BTU 50/60 Hz 4000 BTU 50/60 Hz 4000 BTU Part Description R513A R407C R513A Capacitor, Compressor, Run S6173SP Capacitor, Compressor, Start* 89112001SP or 89176325 10-1032-08 Coil, Condenser 89075089SP... -
Page 23: Parts List
PARTS LIST IPTION QTY. XA, 115V, R134A X 16.9 X .34 Part Description Part No. 5 VAC, 220MM D,G28 4K Compressor See Components List 6 X 1.5 THK Filter, Air, Reusable 89096883SP DT, 55-110 F 4-POLE Impeller, Condenser See Components List P, G28 4K PACTED BEAD STYLE Coil, Condenser... -
Page 24: Technical Information
TECHNICAL INFORMATION Design Data BTU/HR @ Max Ambient Max Ambient Shipping Full Load Temperature Temperature Weight Model Voltage Phase MOPD Amps Cooling Amps °F/°C °F/°C lb/kg 15/25 G280416GXXX 50/60 10.4/10.1 3700 131/55 84/38 (Heater Option) G280426GXXX 50/60 4.6/5.8 4600/4900 131/55 84/38 G280446GXXX 400/460... -
Page 25: Remote Access Control (Optional)
Remote Access Control (Optional) See REMOTE ACCESS CONTROL on page 26 Head Pressure Control (Optional) Unit is set at the factory, no adjustment necessary. At a saturated condenser temperature of 85°F (95 psig), the condenser fans will power off. At a saturated condenser temperature of 118°F (165 psig), the condenser fans will power on. -
Page 26: Remote Access Control (Optional)
Cooling/heating setpoint, cooling/heating differential and high/ low temperature setpoint are designed to be adjustable by the operator. All alarms are outputted through the alarm relay. In addition, if nVent HOFFMAN network card (Remote Access Control (RAC) Module) is used the parameters that state above and alarms are accessible remotely through Ethernet connection utilizing SNMP, Modbus TCP, EtherNet/IP, and Profinet protocol . -
Page 27: Keypad
Keypad Symbol Color Icon Indication Icon Status Alarm – active when alarm is detected Flashing when alarm is detected Keypad Select – access to passcode, hold 5 sec to turn unit White ON/OFF, parameter menu, parameter setting, write or save to EEPROM, and hold for 3 sec to return to main screen Keypad Up –... - Page 28 nVent.com/HOFFMAN...
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Page 29: Displaying And Changing Program Settings
DISPLAYING AND CHANGING PROGRAM SETTINGS To view or access the settings To access folder menus 1. Press button to display passcode screen, the screen displays PSd on line 1 and 0000 on line 2. 2. Press button to access to passcode, the first digit of 0000 is flashing and press 3 more times until the last digit of 0000 flashes. 3. -
Page 30: View Alarms
There are seven possible alarms (non-latching) detectable by the controller and are indicated on the controller display. All alarms are accessible locally. If a nVent HOFFMAN network card (RAC module) is used, alarms are also accessible remotely through the Ethernet and USB connection. -
Page 31: To Reset The Alarms In Alarm History Folder
To reset the alarms in alarm history folder The controller is designed with ability to reset or clear the alarm history 1. Follow instructions above to enter the passcode and open the reset folder (rStF). 2. The screen displays rSAL on line 2 and nO on line 1, press button the nO is flashing 3. -
Page 32: Primary-Secondary (Ps) Mode
5. Any unit that loses communication with the primary unit will enter standalone mode and continue operating based on its own temperature probe until communication is re-established. 6. All temperature setpoints and alarms can be viewed remotely if one of the ACUs is equipped with nVent HOFFMAN network card (RAC module). -
Page 33: To Configure The Controller From Single Mode To Ps Mode, Simply Follow Below Procedures
To configure the controller from single mode to PS mode, simply follow below procedures 1. Before proceeding the PS mode configuration for each controller, make sure that the communication cable is connected from one ACU to another using a shielded cable with the shield grounded. 2. -
Page 34: To Configure The Controller From Single Mode To Ll Mode, Simply Follow Below Procedures. Perform This Configuration For Both Air Conditioners
AIR CONDITIONER UNIT REMOTE COMMUNICATION FEATURES Air conditioners that include the optional nVent 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://www.nVent.com/en-us/... -
Page 35: Software And Configuration File Downloads
Ethernet or USB connection. With nVent HOFFMAN PC Interface Tool a user has the ability to remotely manage and monitor hundreds of nVent HOFFMAN air conditioners both domestically and globally at one central location at user’s own pace, so long as all air conditioners are configured in the same subnet in the network. -
Page 36: To Change The Static Network To Dynamic Network Mode
A/C units configure in the same subnet in the network. Refer to remote access control (RAC) Instruction Manual for configuring multiple units and with text message and email capability in nVent HOFFMAN A.C. -
Page 37: Remote Access Control Pin-Out
Remote access control pin-out FUNCTION NAME PIN# WIRE# RETURN BLK75 ENCL MI BLK77 COOL ORG78 – HEAT BRN76 RETURN YEL39 ALARM RELAY OUTPUT YEL38 GROUND BLK40 POWER (24 VAC) WHT41 – – INLET TEMP PROBE – DOOR OPEN SWITCH WHT63 GROUND RESERVED –... -
Page 38: Maintenance
MAINTENANCE Performing preventative maintenance (PM) helps to keep your nVent HOFFMAN AC unit operating at the highest most efficient levels. Maintenance should be performed at least twice a year, more frequently when in challenging conditions, such as dusty, high humidity, high heat, oily or corrosive environments. -
Page 39: Condenser And Evaporator Air Movers
Cleaning Instructions: 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. 3. Recoat the filters with RP Super Filter Coat adhesive. When spraying filter do so from both sides for maximum concentration of adhesive. -
Page 40: Preventative Maintenance/Inspection
PREVENTATIVE MAINTENANCE/INSPECTION Maintenance/Inspection Recommendations (Perform at least 2 times per year – more frequently as required by operational environment) Last Completed Check Point Description Date Date Date Date Run unit through all modes of operation and record temperatures, Operational Inspection voltages, and amperes Comments: Visually inspect unit for damage, cleanliness, missing, loose, or... -
Page 41: Trouble Shooting
TROUBLE SHOOTING Compressor wont start (Unit w/ Manual Tstat) Possible Causes: Replace capacitor(s) - Bad Cooling If applicable: Check Is the enclosure temp Do you have voltage Contactor / Relay capacitor(s) for 10°F above set point. at compressor? - Loose Wiring proper capacitance. - Page 42 “Unit wont Cool” w/ Manual Tstat 115 V/230 V/460 V Does the unit have correct Correct voltage and retest.OR supply voltage? Contact certified electrician. Clean and re-test 115 V/ 460 V 260 V Contact Is the phase Is the Verify filter Is the Does Technical...
- Page 43 Evaporator Coils Freezing (Unit w/ Manual Tstat) Possible Causes: - Electrical Possible Causes: connections Are the evaporator Is there - Faulty electrical connections for one or both fans. - Bad fan and condenser voltage to the Condenser Fan: fan(s) running? inoperable fan? - Bad HPC (if equipped) Does the capacitor...
- Page 44 Unit Tripping Breaker (Controller or Manual Tstat) Check power connections and Does breaker components for possible short circuit. trip instantaneosly? Verify correct power supply. Is the compressor shorted Does breaker trip when Replace Compressor to ground? Compressor comes on? Are fuse / breaker the correct type Check electrical connections and component amp draw.
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Page 45: F-Gas Information
For additional technical support: • Call 763-422-2211 or • Email cooling.service@nVent.com or • Download Field Service Request (FSR) from: http://HOFFMAN.nVent.com/en-us/cooling-field-service-request F-GAS INFORMATION G280426GXXX G280416GXXX G280616GXXX G280446GXXX G280455GXXX G280626GXXX G280646GXXX Refrigerant Kühlmittel R513A R407C R513A Chłodziwo 1774 Factory Charge 340 Grams 567 Grams 454 Grams Füllmenge durch Hersteller... - Page 46 nVent.com/HOFFMAN...
- Page 47 nVent.com/HOFFMAN...
- Page 48 nVent 2100 Hoffman Way Anoka, MN 55303 USA Tel +1.763.422.2211 Fax +1.763.576.3200 nVent.com Our powerful portfolio of brands: ©2024 nVent. All nVent marks and logos are owned or licensed by nVent Services GmbH or its affiliates. All other trademarks are the property of their respective owners.
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