[C320-list] AC

[Rick Sulewski]

Sounds like the AC cabin temperature setting is much too low given the
difference between indoor & the outdoor temp/humidity. I understand that the
closer you move toward a 20 degree differential, the greater the likelihood
that one can end up with a frozen coil ( as per my recent annual home AC
service technician visit last month).  If I am not mistaken, many AC units
installed in the aft corner storage above the fuel tank often draw uncooled
air into the AC unit inlet and so the higher humidity/temperature
differential to the AC temperature setting is may likely result in frosting
the coils. That is precisely why I installed the return air inlet in the aft
cabin that provides cooler air to a sealed plenum aligned directly to the AC
coil (my AC unit is installed in the port locker). I am located in the
south-western basin of Lake Erie where 90 degree temps and 85-90 percent
humidity are normal in July & August (especially this summer). Not
experiencing coil freezing issues as I am circulating cooler & dryer cabin
air to the inlet resulting in faster &  lower cabin temperatures and that
often exceeds a 20 degree cabin to outdoor temperature difference without
freezing the AC coil.

Rick
My-Ria #277 

-----Original Message-----
From: c320-list-bounces at lists.catalina320.com
[mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of
wflowe3 at aim.com
Sent: Friday, August 03, 2012 11:15 AM
To: c320-list at catalina320.com
Subject: [C320-list] AC

I'm having some intermittent problems with my evaporator coil icing over.
Thought I'd cured the problem by making sure all ac vents were open but it
iced up again yesterday afternoon (after it had run fine all day).  Any
suggestions. It is a Cruisair  system that sits on a shelf above the fuel
tank in the starboard aft lazerette.  Running the unit in the heat cycle
defrosts the coil in a few minutes but I'm trying to figure out why it
freezes in the first place.  Any ideas?