Air Conditioning

[Gregory OConnor]

Barry Yea thanks for the info. I hope noone sends you a private
email for information on AirCon. When questions are asked and
answered in an open forum, everyone benifits for the exchange.

Your 2 cents hold value of $28.00 when posted to an audiance of 1400.

GregoryO'Connor
94ptRomolandCa


--- In WanderlodgeForum@yahoogroups.com, barry boyette
wrote:
>
> Hey all. I'm new to this forum, been lurking for a while; but,
thought I'd throw my $.02 in. Adding freon and doing a little of
your a/c work is really no big deal. For example, make sure your
condenser is clear of dirt and debris. It must flow air to work.
Then, locate the big hose coming into the a/c compresser on the
engine. The compresser is mounted to the front of the engine and
has a fan belt that turns it. There are two hoses coming out of
it. The big one is the low pressure side and the little one is the
high pressure side. The low or big one should be cold and have
water droplets on it when running and the high side will be hot to
the touch.
>
> While under there looking around, locate the service port which
should be on the low pressure (big hose) somewhere. It looks like a
valve stem for your tire. That is where you put freon in. The
little hose or high side should also have a service port on it.
Never add freon here. The high side port should only be used for
checking the high pressure when utilizing a set of a/c gauges.
>
> Wal Mart sells kits for adding freon that has a little gauge
included. Attach the hose to the low side service port with the
engine cut off. Look to see what the pressure is with engine
stopped. A good rule of thumb is the static pressure should be
about the same as the outside ambient temp. If it's zero then you
need to find someone that can service your system from scratch. If
it's got some pressure on it then you can probably proceed.
>
> Locate the freon site glass. You will need to watch this while
adding freon. Next, start the engine and turn the a/c on. Look to
see if the front of the compresser is turning. If you're not sure
shut the motor off and look at the front of the compresser while it
is off. Now, restart the engine and check to see that the front of
the compresser is turning. This lets you know if the clutch is
kicking in and trying to circulate freon. Sometimes, you have to
put a little freon in before the clutch kicks in. Simply open the
freon valve and let some of it into the system. Some people hold
the can upright and some upside down. I like to turn it upside down
because it gets into the system quicker without trying to freeze up
the can. Continue adding freon and watching the sight glass at the
same time. If the system is low on freon the sight glass will have
bubbles in it. They look like they are racing by at light speed.
If you have converted to 134A stop putting freon
> in when the bubbles are almost gone. If you are still using R12
or one of its cousins, keep adding until the bubbles are gone.
While you are adding freon the blower will start to blow colder
air. Depending on the charge in the system it could take several
cans to fully recharge. It's probably better to have to little
freon than to much. The low side when full of 134A should read
between 14 to 35 pounds on the gauge give or take. A lot can
influence this like outside temp and how much air is flowing across
your condenser up top. On our crop dusters we have installed double
condensers with double fans and we are seeing low side pressures of
10 - 15 and high side a little over 100 pounds even on a hot day.
The condenser is the secret. Keep it clean and make sure it's
flowing air.
>
> When we started fooling with a/c on our crop dusters we didn't
even know what the condenser did. Now we build our own systems using
off the shelf parts for big trucks and ambulances. It is a little
scary at first but there is not a lot to it. Spending 600-700
dollars recharging a low system is highway robbery when you can do
it yourself for $50 or less.
>
> One other thing, I've found over the years a lot of differences
of opinions when it comes to air conditioner work. What works for
me may not work for you. If you have specific questions feel free
to email me with your questions.
>
> barryb
>