Control unit for air conditioner Dometic Marine Air
Passport I/O & AH-Passport I/O

The Passport ®I/O Environmental Control Unit is a microprocessor based controller designed for the precise monitoring of split and self-contained, direct expansion air conditioning systems in marine environments. The control can also be used with chilled water air handlers and is called AH-Passport I/O in that application. The control operates at 115 or 230 volts, each operable at 50 or 60 cycles. Displays are available in black, white or silver. The assembly has a ground shield to protect against static interference and RF noise. The circuit board is conformally coated to provide high resistance to external damage or corrosion.

The Passport I/O circuit board utilizes state-of-the-art SMT technology. Internal self-diagnostic programs provide complete electronic checks of all lights, sensors, keys and circuits.

*Automatic humidity control – reduces moisture when the boat is unattended.

*Multiple fan speed selections – automatic or six manual speeds.

*Calibration of fan speed settings and temperature display to maintain precise control.

*Lexan face plate has tactile switches with universal symbols for ease of use and international recognition.

*Easy connections using phone-type modular jacks which are shielded and grounded.

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