This project involved some plumbing, electrical wiring and cabinet making.
No duct tape was used anywhere!
About Marine Air Systems
Marine Air Systems started building air conditioning systems for boats in 1977. In 2003, Dometic acquired Marine Air (and Cruise Air) from Taylor Made Corporation. Dometic sells air conditioners for boats under 3 different names: Marine Air Systems, Cruise Air, and Dometic. I believe it has taken quite a while for Dometic to consolidate all three operations but the three brands are practically identical now.
What made this replacement less daunting was the fact that the cooling water system, electrical wiring, and most of the air handling system did not require changes of any kind. The latter was due to generously sizing the cold air supply grills and ducting for our previous air conditioner system.
Improvements in the New Unit
The new unit was clearly designed with sound reduction in mind. The high-speed fan is totally enclosed in sound-absorbing foam and the motor is tucked inside the rotating blades. The heavy plastic base used as a condensation pan is mounted on vibration-absorbing rubber feet and the hold down clips also use rubber vibration isolators.
|Shown in this photo is the hold down bolts and the vibration isolators |
which help reduce sound transmission.
Return Grill Change
|With the toilet temporarily removed, I cut the hole in the bulkhead |
and first up the new 14-inch x 14-inch return air grill.
Air Outlet Change
|Maggie crawled up through the A/C cabinet to get into the wet locker |
so we could replace the large plastic tee in the air distribution system.
|It was nearly impossible to replace the large plastic tee located in the wet locker |
from outside the locker. We spent a lot of time trying. She wasn't sure
that she could get back out of this area but she made it.
Rear Enclosure Improvement
|The rear enclosure is shown at the lower section of this photograph. This |
photograph is looking down from the top of the wet locker.
Cabinet Face Change
|There is a lot of equipment packed into this small |
cabinet but it is complete and working great.
Addendum - August 21
This was a project whose completion lingered on for a couple weeks after the unit was running. I made a closure panel from 1/2-inch thick teak-veneered plywood and applied a special stain mixture and 4 coats of Epiphanes varnish, sanding between each coat.
|I over-sized the holes in the bulkhead to accommodate brass threaded inserts.|
I used brass instead of stainless steel inserts so that I could avoid galling.
|The finishing of the return grill turned out pretty nice. Matching the shade of |
the existing teak was difficult--the result is not perfect but close enough.
For anyone else adding central air conditioning to a Landfall 38, 16,000 Btu is the perfect size.