They have what Friedrich calls a slinger ring on the fan that picks up
the water and splashes it on the condensor. Despite what Lena posted,
they still have them. (The installation manual for this one is dated
10/97, but I think the unit is only about 4 years old)
But something annoys me and I wanted to get all of your opinions. The
installation instructions say, in every sketch of each different way
of installing this room air conditioner that the unit should slope
down 3/8" from the wall or window to the outside-most edge.
But neither the operating or install instructions say why, or give any
indication that they use a slinger ring (I only thought to ask because
I saw slinger rings mentioned here), or that if the unit slopes too
much, the water will overflow out before the slinger ring can get it.
That's true, right?
So at work they installed the AC correctly, but after 3 years
something slipped and now the outer edge is 2 inches down, not 3/8".
So for more than a year it's been sagging and there seemed no real
reason to correct that, because Friedrich didn't say a word. So we
were losing out on cooling, and paying more for electricity, also,
I wrote them to be sure, and got a dry answer with no apology.
I think they should change the manual. What do you think??
The slope is usually to assure that water does not drip back into the house.
There is a drain pan under the evaporator coil to send the water to the
slinger ring. The pan may have some slope built into it.
Maybe. It depends on the amount of humidity in your region. In a dry
climate it would make no difference.
I would hope so, you asked about getting rid of water :)
I'm not there very often. It's actually my friend's workplace.
One day I was there, after the AC was tipped 2 inches, the water was
coming out of the AC in a continuous stream, and falling on the
ground. Heavy enough that it didn't break in to separate globs of
water for the first 3 or 4 feet (the amount I could see.)
If having a slinger ring is a good idea, I think she was losing out on
90 or 95% of the effectiveness of it.
I should have said it was Baltimore. I'm sure there are exceptional
days but dry here is 40%, maybe a little less, and it's often over 70%
Well, it was an *installation manual*, right? Not a theory of
operation. And the 'word' they said was have "a 3/8" inch slope".
I agree that the manual should say that this slope is needed
for optimum efficiency and energy conservation.
Neither the installation nor the operation manual mentions it. I
think both should say that it is important to have it at the right
I've read owners manuals that explain things. They don't have to give
patent secrets, but if they had said why, when it sagged, my friend
would have gotten it fixed.
The 3/8 inch downslope is to ensure POSITIVE extraction of the condensed
water. They don't want you complaining that the floor is always wet
under the AC and thereby have to pay for repairs to the floor and
With a 2 inch downslope, it is then a bit doubtful that the slinger ring
is in contact with the water. At 3/8 inch, the mfg is also saying that
condensate is forming an air seal under the unit to keep the hot air
outside. At 2 inch slope it is likely that the water seal is not in
place and you are leaking hot air to the office.
Get the AC people back out to re-level the unit.
Thanks a lot, Robert. The first point you make I thought might be the
case and I appreciate your saying so. The second point, I hadn't even
They had hired an independent guy to install it, and he's disappeared,
but they can hire someone else now. I think if he had been around,
they would have this fixed already, but it's easy to let things slide
when they know of no particular reason to re-level it. That's what
annoyed me about the manual.
I didn't snip anything above because I'm sending my friend a copy of
this. (It's my friend's job, not mine.)
The fan has a ring on it that extends its reach into the drip pan. It
then lifts a small amount of the drip pan water up and flings it onto
the condenser coil. Central units cannot do that as they are separated
from the condenser by many feet of wood, insulation and
brick/stucco/siding, Now a resourceful chap might figure out a way to
re-route the central AC drain water (cleaner as pollen and most dust are
trapped by the furnace filter) outside to the top of the condenser and
drip the water between the edge of the fan blade and its shroud. The
fan would then throw the water outwards to the coil when the fan is running.
Don't try it on any unit not designed for it. In other words, don't
try it on any home A/C.
I believe the main problem has been corrosion, whether the condenser
precooler used municipal water or evaporator runoff, or whether the
water was sprayed or evaporated from a wick. When these devices
started to become popular in the mid-1970s, one A/C manufacturer in the
southwest, Goettl, expressly warned that the use of any such device
would void their warranties. By about 1990, precoolers became rare,
and all you'd see left of them were their metal frames with their wicks
Water source heat sinking is not uncommon in Florida.
Beachfront high-rise condominiums used well water for this purpose,
draining to the ocean. In Ft Lauderdale, the water table was lowered by
decades of this practice, resulting in salt infiltration, and now the
buildings have to use closed systems circulating to heat exchangers on the
Some single-family houses here are cooled with pond water, if available. I
have also seen swimming pools used for this, although it is opposite to the
season for pool heating.
Your ordinary split-system air-cooled condensers work much more efficiently
when rain falls on them.
my freind did that at his grocery store on the freezer condensers. it
cut his electric about half. he just cleaned the coils with something
like lime away every year. he basically put misters in the condenser
On 1 Aug 2006 11:22:35 -0700, email@example.com wrote:
The principle works. Some AC units have a water bath for the coils to
sit in while the water is airated.
Some are even residental sized.
As far as using a garden hose, I don't think he wants you to stand
there all day, but maybe clean your coils.
tom @ www.Consolidated-Loans.info
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