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SD35 Locomotive Products | HVAC, Rooftop

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Dayton-Phoenix Rooftop-Mounted Air Conditioners have established a reputation for providing efficient, reliable ventilating and air conditioning service. Our versatile air distribution system with adjustable multi-port vents eliminates hot and cool spots for greater crew comfort. Our microprocessor-based system control monitors internal operation by assessing temperature in two different locations. High and low pressures, current and voltage levels are also monitored to provide more efficient operation.

Comprehensive Inspection/Overhaul Cycle Extended

Dayton-Phoenix uses all AC motors, which eliminate commutators, brushes, and slip rings, to provide better reliability and reduced maintenance and shopping time. This effectively changes the maintenance cycle from 90 days to 5 years. We also build our own inverters to ensure compatibility with the motor. Dayton-Phoenix has extensive experience with matching motor and inverter designs which benefits every air conditioner we build.

The special semi-hermetic compressor was pioneered by Dayton-Phoenix. The motor employs a unique electronic control system that optimizes performance while minimizing system weight. The compressor's semi-hermetic design eliminates couplings and alignment requirements and provides leak-free performance. R407C refrigerant is used to maintain cooling while meeting the latest environmental laws. This refrigerant has a proven performance history and proven system reliability. Minimal piping and connections provide unrestricted and leak-free refrigerant flow. Refrigerant Migration Protection stops compressor slugging and extends unit life.

The Rooftop-Mounted Air Conditioner also includes an RS232 serial communications port to allow quick access to diagnostic information that can expedite preventive maintenance procedures to eliminate time-consuming shop testing. Diagnostic information includes high and low pressure, switch input error, over/under voltage, over temperature, and over current.

Our design engineers have used Finite Element Analysis and vibration tests to optimize the structural integrity of the unit and Failure Mode Effect Analysis (FMEA) to ensure its reliability and predictability. Each air conditioning unit is performance tested prior to shipping to give you a rugged, long-lasting, reliable ventilating and air conditioning system for your locomotive.

For application/Inspection/Overhaul Cycle information related to the below listed legacy models, please contact your DPG Sales Representative.

Products compatible with locomotive type "SD35" are outlined in orange.
DPG Part # Reference # Description Details
2806700 HVAC, inverter-style rooftop
2807000 HVAC, companion alternator rooftop
PM5169 9571209 AIR CONDITIONER, VVVF AC/74 VDC, ROOFTOP
PM5174 AIR CONDITIONER, 74 VDC, ROOFTOP