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Summary of Contents for nVent Hoffman SpectraCool NHZ36 Series
- Page 1 We connect and protect SpectraCool Air Conditioner, Hazardous Locations NHZ36 Model Instruction Manual R513A P/N 89246230 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 ..............................5 How To Read Model Numbers ..................................5 Installation Instructions ....................................6 Dimension Drawing .....................................7 Mounting Cutout Dimensions ..................................8 Wire Diagrams And Schematics ..................................9 Generic 1 Phase Wire Diagram (actual unit options may vary) .......................... -
Page 3: Warranty And Return Policy
Using nVent HOFFMAN PC interface tool ................................28 USB communication mode ..................................28 Ethernet communication mode ................................29 Remote access control pin-out ................................30 MAINTENANCE ......................................30 Compressor ........................................30 Inlet air filter ........................................31 How to remove, clean or install a new inlet air filter ............................31 Condensate management and drain trap maintenance ...........................32... -
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: Handling And Testing The Air Conditioner
HANDLING AND TESTING THE AIR CONDITIONER If the air conditioner has been in a horizontal position, be certain it is placed in an upright, vertical or mounting position for a minimum of five (5) minutes before operating. TEST FOR FUNCTIONALITY BEFORE MOUNTING THE AIR CONDITIONER TO THE ENCLOSURE. Refer to the nameplate for proper electrical current requirements. -
Page 6: Installation Instructions
INSTALLATION INSTRUCTIONS 1. Refer to nameplate for hazardous location rating. 2. Install a suitable switch to de-energize the air conditioner for repairs or remove the fuse. 3. Inspect the air conditioner and verify correct functionality before mounting the air conditioner. See Handling and Testing the Air Conditioner on page 5. -
Page 7: Dimension Drawing
DIMENSION DRAWING 11.50 292.1 9.37 238.1 19.7 14.00 355.7 DOOR SWITCH/ MALFUNCTION ALARM CONNECTOR DOOR SWITCH/ 10.00 MALFUNCTION ALARM REMOTE ACCESS MATING CONNECTOR CONTROLLER (SHIPPED LOOSE) (OPTIONAL) 5.00 SMART CONTROLLER 12.7 ENCLOSURE AIR IN AMBIENT AIR IN REMOVABLE HANGING TABS WARM POWER AIR OUT... -
Page 8: Mounting Cutout Dimensions
MOUNTING CUTOUT DIMENSIONS 89074387 Surface Mount Note: Mounting Gasket Adheres to Air Conditioner nVent.com/HOFFMAN... -
Page 9: Wire Diagrams And Schematics
WIRE DIAGRAMS AND SCHEMATICS Generic 1 Phase Wire Diagram (actual unit options may vary) 50/60 HZ 89214175 REV. C nVent.com/HOFFMAN... -
Page 10: Generic 1 Phase Schematic (Actual Unit Options May Vary)
Generic 1 Phase Schematic (actual unit options may vary) 89214203 REV B nVent.com/HOFFMAN... -
Page 11: Nhz36 8K Btu 230 V Only Wire Diagram (Actual Unit Options May Vary)
NHZ36 8K BTU 230 V Only Wire Diagram (actual unit options may vary) 50/60 HZ 89214178 REV B nVent.com/HOFFMAN... -
Page 12: Nhz36 8K Btu 230 V Only Schematic (Actual Unit Options May Vary)
NHZ36 8K BTU 230 V Only Schematic (actual unit options may vary) 89214205 REV B nVent.com/HOFFMAN... -
Page 13: Generic 3 Phase Wire Diagram (Actual Unit Options May Vary)
Generic 3 Phase Wire Diagram (actual unit options may vary) 50/60 HZ 89214177 REV B nVent.com/HOFFMAN... -
Page 14: Generic 3 Phase Schematic (Actual Unit Options May Vary)
Generic 3 Phase Schematic (actual unit options may vary) 89214204 REV B nVent.com/HOFFMAN... -
Page 15: Component List
COMPONENT LIST NHZ360616GXXX NHZ360626GXXX NHZ360646GXXX 115 V 1-Phase 230 V 1-Phase 460 V 3-Phase Part Description 50/60 Hz 6000 BTU 50/60 Hz 6000 BTU 50/60 Hz 6000 BTU Bridge Rectifier 89087424SP 89087424SP 89087424SP Capacitor, Compressor, Start 89173376SP 10103208SP Capacitor, Condenser Impeller 52603213SP 52603214SP 52603214SP... -
Page 16: Parts List
DANGER: Danger: Explosion hazard - Substition or incorrect installation of components may void the suitability for hazardous location use. Danger: Risque d’explosion – Le remplacement ou une mauvaise installation des composants peuvent rendre l’équipement inadapté à une utilisation en zone dangereuse. Note: This design utilizes an encapsulated compressor overload, which is mounted on the side of the compressor body. -
Page 17: 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 NHZ360616GXXX 50/60 8.6/9.4 5639/6217 131/55 100/45 NHZ360626GXXX 50/60 4.7/5.0 5771/6410 131/55 100/45 NHZ360646GXXX 400-460/460 50/60 1.7/1.8 5700/6200... -
Page 18: 115 V/230 V To 10 V Transformer (Optional)
115 V/230 V to 10 V Transformer (Optional) This transformer powers the thermal display. Door Switch Several door switches may be connected in series and operated on one cooling unit. The door switch only supports a floating connection, no external voltages. Remove jumper from terminals 3 and 4 of the connector and connect the door switch to the two terminals if a door switch is available. -
Page 19: 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 20: 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 21 nVent.com/HOFFMAN...
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Page 22: 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 23 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.
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Page 24: Displaying Temperature Data On Screen
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. -
Page 25: 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 26: Connecting Units Together In Lead/Lag Mode
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 27: Air Conditioner Unit Remote Communication Features
When set to zero ACU1 and ACU2 will automatically alternate every cycle. 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. -
Page 28: Using Nvent Hoffman Pc Interface Tool
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 29: Ethernet Communication 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 30: Remote Access Control Pin-Out
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 31: Inlet Air Filter
Breaking of seals on compressor access fittings during warranty period will void warranty on hermetic system. Recharging ports are provided for the ease and convenience of reputable refrigeration repair service personnel for recharging the air conditioner. Inlet air filter This air conditioner was designed with a dust resistant condenser coil. This allows it to be run filterless in most applications. The air conditioner is shipped with a filter in place for your convenience. -
Page 32: Condensate Management And Drain Trap Maintenance
Condensate management and drain trap maintenance The drain trap can be cleaned by pouring soapy water into the face of the evaporator coil. An alternate method is to remove the panel underneath the condenser coil, locate the drain trap above the condensate evaporator pan, and blow compressed air through the tube. Condenser and evaporator air movers Impeller motors require no maintenance. -
Page 33: 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 34: Trouble Shooting
TROUBLE SHOOTING Unit won’t turn on and/or cool. Possible low charge. - Visually inspect for leaks Replace - Verify pressures Condenser inoperable - Contact HVAC certified Does the unit have Correct voltage fan. Technician. correct supply voltage? and retest See “Compressor Possible (+/–10% of rated or Contact... - Page 35 Compressor won’t start Activate controller. Adjust set point See controller section in or parameters Is enclosure manual for instructions. Is Unit calling Is the controller temperature for cooling? on/active? Contact Technical Is the alarm greater than 7 Support (763) 422-2211, indicator degrees of prompts 1, 2, 3...
- Page 36 Evaporator Coils Freezing Replace Fan Is there voltage Are the evaporator to inoperable Check electrical connections and condenser fan? fan(s) running? Check that controller fan indicators are illuminated - Check Manual for Controller Operation procedures - Contact Technical Support (763) 422-2211, prompts 1, 2, 3 Is cabinet properly sealed? Replace seals and gaskets (door gaskets, conduit openings,...
- Page 37 Water in the enclosure Is condensate Unplug/remove restriction drain plugged/restricted? Is cabinet properly sealed? See Evaporator coils Is unit icing up? (door gaskets, conduit openings, freezing up flowchart. mounting gaskets, etc.) Contact Tech Support 763-422-2211 ext 1-2-3 Properly seal cabinet nVent.com/HOFFMAN...
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Page 38: 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 NHZ360616GXXX NHZ360626GXXX NHZ360646GXXX NHZ360816GXXX NHZ360826GXXX NHZ360846GXXX Refrigerant Kühlmittel R513A R513A R513A R513A R513A R513A Chłodziwo Factory Charge 567 Grams 624 Grams 454 Grams 765 Grams... - Page 39 nVent.com/HOFFMAN...
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- Page 44 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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