Hydromatic I 4 Stage Control Board

Micro-Air, Inc.


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Hydromatic I 4 Stage Control Board
(OBSOLETE) No Longer Available

The Hydromatic I is the classic, legacy control system for multi-stage marine chillers. It has been sold for over 20 years and is installed on hundreds of boats around the world. Hydromatic I has stood the test of time because of its simple and robust operation.

  • Integrated and configurable 115 or 240VAC/50-60Hz Logic Power Supply
  • Separate Control Power Supply input available (24/115/230VAC) to power contactors and valves
  • Supports up to 4 stages with individual compressor, electric heater, and reversing valve outputs
  • Isolated triac outputs for all AC control outputs
  • 8-Pin Display Interface
  • High and Low Pressure Safety Switch Inputs for each stage
  • Oil Pressure or Flow Switch Safety Inputs for each stage that can be use with individual Freezestats
  • Separate Service (condenser) Temp Sensor Inputs for each stage
  • Common Return and Supply Water Temp Sensor Inputs


  • 12.5 x 6.5