NW2 Passenger Car Air Conditioning Unit

by Northwest Rail Electric

Phone: (503) 231-4808 Fax: (503) 230-0572 E-mail

See where our equipment is located on a typical passenger car

NW2 Air Conditioning Unit
End Profile of NW2The NW2 an air conditioning unit is designed specifically for the rigors of providing 10 tons of air conditioning capacity and up to 27 kilowatts of heat (36 if heater is mounted externally) while being mounted underneath a railroad passenger car. The package is intended specifically for new cars or very heavily rebuilt cars. The package will not fit cars with only overhead duct work, as the unit must be mounted under the passenger car floor. Unlike rectangular condenser units that are basically modifications of commercial building systems, this air conditioning system has a profile (see end view at right) that is designed specifically with under-car clearance requirements in mind.

Air Conditioning Compressor:

The unit is designed with highly reliable Maneurop hermitically sealed compressors for the air conditioning system.

Heat:

On some units, up to 27 kilowatts of electric heat is also integrated into the package. On other units, 24 or 36 kilowatts of heat are installed in separate duct heaters.

Condenser Coil:

At the heart of this package is a condenser coil designed to survive the rigors of the railroad environment.

Drip Pan:

The evaporator drip pan is a stainless steel sheet with stanless steel drain tube and a built-in drain trap to prevent outside dirt from entering the system when it is shut off.

Fans:

On each unit, the condenser and evaporator fans are all the same make and model, which allows for a reduced parts count over traditional split systems. They are three speed motors, so that the unit will only make as much noise as necessary to keep the car at the required temperature. The variable speed is also used on the condenser fans, so that even exterior noise is significantly reduced during partial load conditions. Fan blower wheels are aluminum, and if requested by customer can be a welded aluminum type. Each fan is equipped with an internal temperature detector that will shut off the fan in the event overheats, and will automatically reset.

Electrical Control System:

Indicator lights visible through a sight glass in the front of the unit makes it possible to see if all three phases are present and operating with correct phase rotation. Electrical overload switches wherever possible prevent system damage. Two stages of heat and three stages of cooling allow for best passenger comfort. Emergency heat and cool functions bypass all temperature detection and staging in the event that a severe problem occurs.

Powder Coat Finish:

A durable finish that will survive the conditions present under a railroad car.

Proven Service:

With 10 years of production and over 100 units in service, these units have proven to be reliable workhorses in a rough service environment.

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