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February 26, 2010  |   Comments (1)   |   Post a comment

Technology Showcase: A/C Systems

Here, we provide details on a variety of innovative school bus air conditioning offerings from six manufacturers.


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Rifled has a new skirt-mounted stacked condenser configuration in the works, which will have an emphasis on ease of serviceability and reduction in bus downtime.

Rifled A/C Systems
New innovations are in the works at Rifled Air Conditioning Systems. This year will see the development of a new skirt-mounted stacked condenser configuration. This new unit will have an emphasis on ease of serviceability and reduction in bus downtime, the company says.

All major components will be accessible utilizing a hinged screen and condenser, allowing for easy coil cleaning, service of fans and drier replacement without having to work on one's back underneath the bus.

Rifled says that bulkhead units are fast becoming a popular alternative to the long-proven free blow. They provide minimal cabin intrusion while maintaining BTUs and CFMs. Rifled has bulkhead units specifically designed for all major school bus manufacturers. The company says it was one of the first to have the bulkhead unit on the market, starting with the IC Bus application.

 


 

Carrier made the efficient K-410 unit smaller and lighter than its predecessor while maintaining the same level of performance and efficiency.

Carrier Transport A/C
Carrier's new high-performing Ultra Low Profile K-410 roof-mount condenser unit, designed to minimize the weight placed on the roof of a bus as well as reduce overall height, is being applied in various school, shuttle and paratransit bus applications across North America.

Carrier made the efficient K-410 unit smaller and lighter than its predecessor while maintaining the same level of performance and efficiency. At 5.7 inches tall, the low height of the K-410 unit increases roof clearance and provides a cleaner, sleeker look to the air conditioning installation. At 49 pounds, the lightweight design makes the K-410 unit a good fit for both conventional- and hybrid-drive buses.

By relocating the air conditioning condenser from the typical position under the bus floor to the roof, the capacity and operating efficiency of the air conditioning system improves because the system uses cleaner air from the top of the bus through the unit's heat exchanger, according to
the company.

The K-410 unit uses non-ozone-depleting HFC-134a refrigerant and delivers a high cooling capacity (82,000 BTU/hr). The design specifications include a one-piece "drop in" construction to simplify and reduce the time it takes to complete the installation. The unit's modular construction allows for improved access to internal components, making it easier
to service.

Carrier also recently expanded its product offerings with a new family of Micro Channel Heat Exchangers (MCHX), including the popular CM-2 and CM-3 skirt-mount condensers. The MCHX condensers, ranging in capacity from 60,000-80,000 BTU/hr, were developed to improve the efficiency of
the air conditioning condenser while reducing the a/c system's weight and the amount of R134a refrigerant and oil required per bus.

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need a quote on a complete a/c system for a 1997 school bus , 21' body 16 seat rows, wolfington body with ihc chassis, t444e engine 7.3 international.. looking for complete system to be installed by my crew . no. 352-621-7503 thank you!

larry smith    |    Apr 09, 2013 08:22 AM

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