Does anyone know a source for marine HVAC questions? My googling had got me no where and general boat forums are full of non-pros who argue over the data I've presented...I'm hoping someone can simply explain water cooling expectations as it pertains to my need with a new Webasto 16,000 BTU self contained AC. These are simple drop in and go units...
Hopefully this doesn't violate 10 different rules of this forum, but I'm having trouble define how out-of-bounds this post is...
130 sq foot interior of boat. (31ft Tiara Flybridge, fiberglass for those who care)
Water temp in lake erie marine 80-82F
Outside Ambient 88F
AC intake temp 78F
My boat previous had a 30 year old 12,000 BTU R22 system that worked but couldn't cool the boat (plus it was noisy) so we upgraded to a new 16,000 BTU unit, again for approx. 130 sq ft.
My first unit from the manufacture was defective and I was lucky enough to have the company (Webasto) in the area for some training so they came down to figure out what was wrong after I spent 12 hours troubleshooting it (it was blowing 30 amp breaker). They installed the 2nd unit.
The 2nd unit was installed and bench tested prior to install and was running when they left and it is still running. The company tech gave me a list of suggestions including upgrade my water pump as the old unit was only putting out 200GPH but they recommend 400 GPH. He said I could run it with no damage but on a hottest days it was thrown the high side sensor and log a code and shut down...which is never did while I waited for the new high capacity pump to arrive. This included durin 101F weather last week.
I ordered my new water pump that was rated for 600GPH at 12ft of head. We'll it's only putting out 200GPH like my old pump...before I upgrade the water inlet and outlet to the pump manufactures specs although their specs exceed the inlet/outlet side of the AC unit...here is my question, finally:
Will I see a dramatic cooling effect from having an increase (hopefully double) flow in cooling water considering the specs I gave at the top of this email? I've got one guy HVAC buddy telling me "no" and others who are not professionals telling me yes. What do the pros here think?
I was told by the install tech that this unit may be to big for my boat and may short cycle...but the fact is that it's never shut off once in two weeks and my boat at 78F interior ambient on a moderate day (again specs above) is not acceptable to me.
So I really don't know who to trust and before I start calling in pros I need to get input that water cooling efficiency (temp and flow) can have a dramatic improvement on cooling from the unit.
Thanks for your patience.