'89 Road Air System - Luxury Coach Lifestyles
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Old 03-28-2008, 05:24 AM   #1
Greg York
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Default '89 Road Air System

On 1989 coaches, there is an option referredto as the "Road Air System". This appears to consist of a 24V alternator, split voltage battery system, and a 5KW inverter sufficient to run one or more air units from the 8V92.
From a design standpoint, I understand the theory and attractiveness of improved efficiency as a result of lower current flows in a 24V system. Was this a popular option? Will a coach with this system installed suffer from
higher maintenance costs, parts availability issues, or decreased reliability?
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Old 03-28-2008, 06:04 AM   #2
TechTalk
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'89 Road Air System - We installed several of these systems in the 80s using 5000 watt inverters. They operated satisfactorily, but suffered from poor reliability. The inverters suffered a variety of failure modes. We concluded that we preferred way to operate 120 volt a/c units was from the a/c generator set or shore power. In recent years, on special request, we have equipped a few new coaches to operate an a/c unit from a Trace or ProSine inverter. However, we still don't like the high amount of dc current flowing through the cabling from the batteries to the inverter to produce enough power to operate an air conditioner. A simple loose connection can start to arc, heat up, and create a significant problem. There are those who disagree, but the Newell staff is not enthusiastic about operating 120 volt air conditioning from inverters.
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