I have thru hull for AC right next to engine intake. Unit is installed behind 
last bottom drawer on chart table area drawer is gone bye bye  venting to 2 
outlets 1 on each side midship under sliding plexi

John Conklin
S/V Halcyon
S/V Heartbeat
www.flirtingwithfire.com<http://www.flirtingwithfire.com>


On Sep 19, 2019, at 10:24 AM, Jack Fitzgerald via CnC-List 
<cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>> wrote:

Edd,,

It is simple. Unless you install a cut off valve in the teed line off the raw 
water entail, the engine's raw water pump will suck the water out of the HVAC 
water line. When that happens you will have air in the intake line and your 
engine will over heat, etc. all sorts of bad things will then happen. Air is 
easier to for the pump to suck than water.

Been there & done that, so we built a manifold system to prove water from 1 
intake for the both the engine and HVAC water pump. However, I have to close 
the valve for the HVAC side when running the engine and visa versa. It works, 
but is sometime a PITA

Good luck

Best regards,
Jack Fitzgerald
Fitzgerald Forwarding Co. Inc. FMC license no:1966F
S/V HONEY - US12788
C&C 39TM (1974)
Savannah, GA

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On Thu, Sep 19, 2019 at 9:58 AM Edd Schillay via CnC-List 
<cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>> wrote:
Listers,

Yesterday, I met with an AC installer on the Enterprise to cool off the main 
and aft cabin, as well as fight off mold and mildew (as I understand it, the 
expectation of growth of mold and mildew in this area is far more reliable 
than, say, David Risch actually attending a C&C Rendezvous).

The plan is to sacrifice some of the aft-cabin hanging locker.

Until I haul the boat again, which I don’t plan to do for another four years or 
so, I don’t have a dedicated through-hull. I’ve heard it’s not a good idea to 
tee off of the engine intake, but there is the galley sink drain nearby. Any 
issues with tee-ing off of that one? Obviously, I’d need to refrain from 
dumping chemicals into the sink while the AC is running so as those chemicals 
don’t go through the AC. Anyone know of any issues with that plan?

Also, I’m a little perplexed as to why tee-ing off the engine intake is so bad. 
The AC is 110V AC-powered, so it’s not like I’m going to have the engine 
running and the AC going at the same time? Or can I with my 2000-Watt inverter 
and high-capacity alternator?

All the best,

Edd


Edd M. Schillay
Captain of the Starship Enterprise
C&C 37+ | Sail No: NCC-1701-B
Venice Yacht Club | Venice, FL

Starship Enterprise's Captain's Log<http://enterpriseb.blogspot.com/>










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