KwiKool KCW4221 – ceiling-mounted – 42,000 BTU/h – 3.5 ton water-cooled


The compressor has Short Cycle Protection

The Model KCW4221 (nominal 3.5-ton or 42,000 BTU) is the smallest water-cooled unit possible in size and capacity in The Ceiling Master Series, KwiKool’s Permanent Line of Above-Ceiling Mounted units.

With its no-frills features, high sensible cooling, and extremely small size, the KCW4221 is the perfect solution for cooling small server and IDF rooms, especially when floor space is limited. The Ceiling Master Series, KCW water-cooled models, perform and outlast the competition with its small size, high efficiency, and lower cost.

The built-in mounting supports on the unit’s base allow for easy installation by a qualified mechanical contractor above a drop ceiling, using standard, off-the-shelf hardware.

All Ceiling Master Series KCW water-cooled above-ceiling mounted units require access to a circulating water system, such as a chilled water system. Using tap water for water-cooled models is not recommended. 

The KCW models are equipped with self-regulating internal water regulating valve, which is rated up to 150 psi. KwiKool’s self-contained design also eliminates the need for refrigerant connections, further reducing installation costs.

All Ceiling Master Series KCW units come with two mounted flanges, which allow duct connection for the cold air supply and return. The KCW4221 runs on a standard 230-volt/30-amp single phase circuit and uses any 20-volt thermostat. The unit also comes with an internal high lift condensate pump.

  • 42,000 BTU/H – 3.5-ton capacity air-cooled
  • Compact yet Powerful
  • Runs on 230V 30 amp circuit
  • High Sensible Cooling – Ideal for Server Room Applications
  • All Direct Drive Blowers for Maintenance-Free Use
  • THD Technology – Twin Direct Hyper Drives (Some Models)
  • High Static Cold Air Blower for up to 4 ducts for Cold Air Distribution to Hot Spots
  • Works with Almost All Thermostats
  • Signal Output Connects to Building Control System
  • Works with fire alarm Control for Safety Shut Off
  • Internal High-Pressure 20-ft. Lift Condensate Pump with Overflow Cutoff
  • Automatic Low-Pressure Switch
  • Manual High-Pressure Switch
  • Hot Gas Bypass for Freeze Protection
  • Easy Access Service Ports
  • Compressor Short Cycle Protection
  • Automatic Fan Overload Protection
  • Non-CFC Refrigerants
  • Available in Air-Cooled & Water-Cooled Models

Specification Sheet coming Operation Manual coming Service Manual coming

Categories: , SKU: PAG-KCW4221-040217-01

Additional information

Weight 263 lbs
Dimensions 35.5 × 24 × 25 in
Units by Tons