Micro-Air Hydromatic I 4-Stage Control Board

The Hydromatic I is a legacy 4-stage control board designed for multi-stage chiller systems. It supports both heating and cooling modes with configurable voltage options and advanced safety features. This robust control board offers comprehensive monitoring and programmable settings for precise system management.

Features:

• Supports up to four compressor and heater stages with individual outputs for versatile control
• Configurable for 115V or 240V AC logic power with optional separate control power input
• Includes isolated triac outputs to ensure reliable and safe AC control switching
• Built-in high and low pressure, oil pressure, and flow switch safety inputs for each stage
• Dual temperature sensor inputs for inlet, outlet, and service (condenser) monitoring
• Programmable staging delays and failsafe protection with three selectable levels
• Multi-color LED indicators and 14 override toggle switches for manual output control and diagnostics
• Dual display interface supports remote monitoring with temperature and fault code readouts
• Automatic compressor sequencing and failed stage bypass for continuous operation
• Adjustable setpoints and staging temperatures for both heating and cooling modes

Specifications:

• Dimensions (L x W): 12 1/2" x 6 1/2"
• Main Input Voltage: 120V/240V AC
• Auxiliary Input Voltage: 24V - 110V AC (with external transformer)
• Contactor Output Rating: 5A at 12V - 250V AC (SSR triac drive)
• Control Current: Under 500mA (all outputs off)
• Setpoint Range (Heating): 95°F to 118°F (35°C to 48°C)
• Setpoint Range (Cooling): 42°F to 58°F (5.6°C to 14°C)
• Staging Temperature Range: 1°F to 6°F (1°C to 3°C)
• Service Sensor Temperature Range: 25°F to 145°F (-4°C to 63°C)
• Pressure Sensor Contact Rating: 50mA (dry contact)
• Failsafe Levels: 3 programmable protection levels

Compatibility:

• Compatible with multi-stage chillers requiring 1 to 4 compressor and heater stages
• Supports both reverse cycle and chill cycle configurations
• Works with MicroAir PTC temperature sensors and standard dry contact pressure sensors
• Designed for marine and industrial chiller control systems with 120V or 240V power supplies

Included:

• (1) x 4-Stage Control Board
• (1) x 8-Pin Display Interface

Hydromatic I Chiller Operation Manual (1.76 MB)