ICM330 Single-Phase Head Pressure Control (120-480 VAC)

The ICM330 head pressure control helps maintain the correct condensing temperature/pressure, which results in a constant head pressure. By adjusting the condenser fan speed, the ICM330 controls the airflow through the condenser. A single desired temperature/pressure setpoint adjustment will result in precise condensing temperatures and stable head pressures.

Features

• Regulates condenser head pressure
• Improves system efficiency Enables shorter compressor run times
• Prevents over-condesning in low air temperatures
• Pressure or temperature control
• Integral heat pump bypass circuitry allows electronic bypass of speed control
• Eliminates overshoots common to on/off and pressure switch controls by controlling the fan speed
• Helps prevent evaporator freeze-ups, low pressure cut-outs and liquid-slugged compressors in low ambient conditions
• Helps eliminate indoor unit freeze-up
• One model covers 120-480 VAC
• Selectable temperature or pressure sensing
• Selectable pressure range
• Suitable for all refrigerants
• Adjustable minimum fan speed for sleeve or ball bearing motors
• Adjustable Hard Start time
• Typical application: A/C and heat pumps
• DIN rail mount
• Optional Pressure Transducer, ICM380 (not included)

Mode of Operation - Upon initiation, the ICM330 will apply full voltage to the fan motor for the time period selected with the Hard Start knob. Hard start time is adjustable from 0.1 to 5 seconds. The hard start ensures correct rotation of the condenser fan, even in windy conditions. After a hard start, the control reads the temperature/pressure sensor and the fan speed is adjusted until the input temperature/pressure matches the set point.

The ICM330 enables the user to set and adjust the temperature or pressure to be maintained by the control. The set point temperature is adjustable from 70°F ? 140°F. The set point pressure is adjustable from 35 ? 465 psig. (ICM380 pressure transducer is available separately).

The ICM330 works with heat pump and non-heat pump applications. For heat pumps, the jumper selector enables the user to specify heat active or cool active reversing valve systems.