Hoffman N280426G050 4000 BTU/HR 230 Volt Sealed Enclosure Cooling Air Conditioner
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Manufacturer Hoffman Engineering
Mfg Catalog # N280426G050
North Coast Part # 1099505


  • Narrow design accommodates 12-in. (300-mm) deep cabinets
  • Energy efficient reciprocating compressor on N28 models
  • Energy efficient rotary compressor on N36 and N43 models
  • R407c and R134a earth-friendly refrigerants
  • Models for 115, 230 and 400/460 3-phase VAC power input
  • UL Listed to save customers time and money with agency approvals
  • Outdoor model operating temperature range from -40 F/-40 C to 131 F/55 C (125 F/52 C on N28 Series)
  • Attractive industrial design with minimal use of visible fasteners
  • Reliable mechanical thermostat on enclosure side of the unit; indoor Air Conditioner models include digital display on ambient side
  • Galvanized sheet-metal cover for rugged factory and outdoor environments
  • Easy-mount flanges for simple installation
  • Cut-out adapter options for enclosures with GenesisĀ® air conditioners enable users to easily transition to the new unit
  • Dust-resistant condenser coil allows the unit to be run filterless in most applications
  • Cleanable, reusable aluminum mesh filter protects coils for maximum cooling performance
  • Mounting hardware, gaskets and user manual furnished with the unit
  • Every unit functionally tested before shipping
  • Standard Indoor Air Conditioner models also include:
  • Active condensate management with heater strip
  • Power-off relay for door switch and other system requirements
  • Malfunction switch
  • Standard Outdoor Air Conditioner models also include:
  • Telcordia GR-487 capable
  • Corrosion-resistant components
  • Malfunction switch
  • Compressor heater
  • Head pressure control
  • 1300 W enclosure heater
  • Nominal cooling capacity:
  • N16 800 BTU/Hr. (234 W)
  • N21 2000 BTU/Hr. (586 W)
  • N28 4000 BTU/Hr. (1172 W)
  • N36 6000 & 8000 BTU/Hr. (1758 and 2344 W)
  • N43 11000 BTU/Hr. (3223 W)
  • Outdoor model operating temperature range from -40 F/-40 C to 131 F/55 C (125 F/52 C on N28 Series)


  • Units with Remote Access Control utilize a digital controller and communicate via EtherNet/IP, Modbus TCP/IP and SNMP over ethernet or modbus RTU over USB.
  • For G52 400/460 rated voltage, the watts are based on .65 power factor.
  • Reference the Spec Sheet in the Downloads tab for complete product specifications, performance curves and detailed drawings.


  • Model Code: 21917
  • Bulletin Number: MCLG
  • Catalog Number: N280426G050
  • Description: Indoor Model
  • Nominal BTU/Hr.: 4000
  • Nominal Watts: 1172
  • Max Current (A): 5.0
  • Fahrenheit Min.: -40
  • Voltage: 200 - 250 VAC
  • Fahrenheit Max.: 125
  • Height (in.): 28.0
  • Width (in.): 11.50
  • Depth (in.): 14.00
  • Weight (lb.): 84.00
  • Standards: UL/cUL Listed; Type 12, 3R, 4; 4X optional; File No. SA6453 || CE || IP 56 Internal Loop || IP 34 on External Loop || Telcordia GR-487 capable (Outdoor)


UPC 78351021917
GTiN 00783510219178
Width 11.50 in
Color RAL 7035 Light Gray/Semi-Textured Powder Coated
Voltage 250 Volt
Type Narrow, Compact
Applications For Industrial Automation, Waste Water Treatment Systems, Package Handling Equipment, Security and Defense Systems
Depth 14.00 in
Height 28.0 in
Weight 84.00 lb
Standard CE,IP 34 On External Loop,IP 56 Internal Loop,Telcordia GR-487 Capable (Outdoor),UL/cUL Listed; Type 12, 3R, 4; 4X Optional; File No. SA6453
Wattage 1172 Watt
Family Brand Name Hoffman
BTU Hour 4000 BTU
Max Current 5.0 A
Max Temperature 125 degrees F
Min Temperature -40 degrees F
Sub Brand Spectracool
Material Stainless Steel
Temperature Rating -40 to 125 F
Enclosure Type NEMA 4X, IP34, IP56
Power Rating 1172 W
Control Type Mechanical Thermostat
Blade Dimensions 11-1/2 in W x 14 in D x 28 in H

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