Richard, I would definitely prefer the AEO module but have not found anyone
selling them. R-Parts got a few in and immediately sold out. I even
considered programming my own microcontroller to adjust a digital pot in the
thermostat line to control the speed but decided it would take a lot more
R&D than I wanted to invest. If I find a couple in the future I will swap
out the originals. I figure a couple of spare power modules might rescue
somebody down island one day. :-)

I do plan to add the indicator LEDs. Saw that in the instruction sheet and
wonder why everyone doesn't do it. Thanks for the idea about the thermal
switch. That will definitely go in the system. The exhaust fan will be
buried behind the galley cabinets so it won't make much noise but no reason
to use amps when they are not needed. Think I will stick one on top of each
compressor and wire them in parallel so that if either needs more air the
fan comes on.

Heard so many stories about RFI from these power modules that I am going to
great lengths to suppress it. Lined the compressor compartment with copper
bug screen, adding chokes to the power lines and running all the signal
lines in shielded twisted pair. Hopefully that will help.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

wrote in message
ups.com...
BD Module selection

Danfoss offers a series of special electronic modules for their 12 volt
BD35 BD50 compressor to address differant installation and operating
problems. There are two different modules to hopefully address the
radio noise problem, A soft start module for the BD50, An AC/DC model
to eliminate the battery charger when connected to shore power and
Danfoss's automatic speed control model. Unfortunately they don't
sell one model that has all of these functions. For more information on
this see the current post on my forum at http://www.kollmann-marine.com

Glenn, I would recommend the automatic speed control module described
by Danfoss as Adaptive Energy Optimization module (AEO). Here are
some additional recommendations:
· These units are so quite I would add a green 12 volt LED to the
module's unused fan terminals small + and F.
· All these modules have a chip inside for troubleshooting if a 12
volt low amp LED is connected to module terminals small + and D. A red
LED is recommended here as the only time it will be on is when there is
a problem.
· If you need to add a supplemental cooling fan I would control it
with a inexpensive temperature Snap Disc Control switch available from
WW Granger. I have used there model 2E246, fan turns on at 120 degrees
and off at 110 degrees the objective is to keep the compressors below
130 degrees F if possable, cost $7.