Buddy,
I hope all is well with you. My 2002 CC has a Hurricane. It circulates heat to the coach, like a Webasto, but only adds heat to the separate house water system by a heater exchanger. The Hurricane website has good information and I think I recall a way to download manuals. If it helps you I can email a copy of mine. It covers Model CO20, CO32, CO45(mine), CO65, C085 and CO105. If the system you are helping needs it, Hurricane had a return and rebuild program available the last time I was on their site.