"Gogarty" wrote in message
...
How come Wilbur has not weighed in on this thread?

So far as I know the Danfoss compressors for marine fridges have only one
service port on the low side. When new it is sealed with a cap and black
gloop. Remove the gloop and the cap and you find an R34a-specific snap
coupling which mates to your vacuuum pump or charging manifold. I managed
to
set things up without a manifold or guages using a fitting that allows me
to
inject refrigerant directly into the low side port. You can vent excess
there
too with an Allen wrench pushing on the valve. Mine has been running
flawlessly (knock, knock) since I evacuated it and carefully injected
refrigerant using the frost line as a guide.




Wilbur has weighed in a time or two. . . Even posted a link to a photograph
of the r134a adapter for car A/C cans.

My Danfoss compressor has two service ports. One to connect the high
pressure gauge and one to connect the low pressure gauge. The port on top is
the suction or low pressure. This is where I add refrigerant. The port below
is the high pressure or compressed gas port. But, I don't bother with the
high pressure reading since there is no way to adjust it independently of
the low pressure side. Mine works great with seven to eight psi on the low
side. I haven't a clue what that amounts to on the high side. If I try to
add more than ten psi on the low side the thing won't keep running. It
cycles off and on as there is some safety circuit that turns it off so it
doesn't become damaged. It also draws too much amperage above 8psi. I like
to see it draw between 3-4 amps. It runs smoothly and quietly then. I like
to see the frost line inside the ice box as anything being cooled outside
the box is wasted effort and energy.

The electrical tape repair is still going strong. No leaks to date.


Wilbur Hubbard