Humidifiers and Dehumidifiers - Hissing Noise from water line?

Hi all,
I'm currently trying to install a Honeywell he120a. Everything was going fine until I installed the saddle valve into the cold water line that connects to the furnace. When I did this, I immediately heard air hissing through the connection. It is NOT gas and has no odor whatsoever. I've left it on for almost an hour now, but it is still hissing.
I'm a bit apprehensive about turning the AC back on.

See on this picture, I attached the saddle valve to the thin copper pipe on the right.

http://picasaweb.google.com/lh/photo/xPpZpSOei3wWzOBYKHPxPg?authkey=bMIt0VhCNrc

What is this hissing?
Is it ok to turn on the Heat again?
Is there a way to stop the air, or is this normal?

Would really appreciate any help with this.

I don't see a picture.

1) are you absolutely certain that you installed onto a water line? You said its not gas - could it be a refrigerant line for the a/c?
2) is the valve closed or open? Could it be a slow flow past the valve?

I can't see any photo......

Sounds like you tapped into the A/C line... (Pipes coming out of the furnace)

DO NOT start the A/C. leave the valve in place, and call for service to remove the valve, and they will have to make the repairs of the line, and recharge the system.

Sorry, let's try this pic thing again. See link below:
Picasa Web Albums - jason - Furnace (http://picasaweb.google.com/lh/photo/6t2aI6kkfjsr_3jUX76Etg)

Yeah, i am afraid you hit the wrong line..... That line is for your A/C system and has "Freon" in it.

Be ready for a bill to make repairs on this.

Also, Not sure what your winters are like, since this in in the attic, not an ideal palce to have the humidifier in the winter if it gets below 32˚.

chances are you may not have water up there anyway.

Well that's pretty bad news for me. What's the harm in running the heat now, isn't the freon only used when the unit is trying to cool the house?
Why would the freon run up to the furnace, anyway?

Thanks for the help. I'll be calling someone tomorrow.

The freon runs to the cooling coil for your A/C, which is just after the air handler fan. If you have a gas furnace, which I think you do, since you have the gas line and exhaust duct there, you should be able to run the furnace.

Don't think I'm wrong, but no expert here.

btw...brace yourself..this could cost you. But don't wait. Leaving the coolant line open until next season can cause more problems I believe.

If you have a heat pump system., then you need to switch your t-stat to emergency heat.

If you know you don't have the heat pump, then you can run your furnace.

As said before, leave the valve on the line to keep it some what sealed.

Thanks for the reply, guys.
What kind of work should I expect to have this fixed? Obviously, I need to have the refrigerant refilled. As far as the line, is this just sealed, or is a new line needed?
If any of you know, how much do you think this would cost?

Thanks again.

He most likey will recovery the charge from the system if there any left.

Remove the valve.

Make the repair of the line (close off the hole) May add a line dryer.

Put system under pressure to check for leaks.

Vacuum the system down, remove air and any moister.

Recharge the system, check the system chrage as per specs on the equipment.

Price? It maybe starting at $400 on up.

heating guy came out and fixed everything for a whopping $420!! He patched the line and put more refrigerant in and it's all working alright now.
He was very much against installing home-wide humidifiers, mostly b/c it can create mold inside of the home duct system.
He added that b/c of the material inside of the fiberglass, a lot of the water would just get absorbed into it like a sponge and thus creating a nice environment for mold. He instead suggested going with a floor-standing whole-house unit.

What do you guys know about this?

Is this your only furnace, or do you have one in the basement?

If you have a furnace in the basement, then you can put it there.

Otherwise, no, I would not suggest adding one in the attic.. too much of risk of problems of water line freezing when it get below freezing outside, and other risk that you may not see in the attic where in the basement you'll see the problem right away.

I see.
Well, thanks for the info.
You all were extremely helpful. I probably should've come here before engaging in this unfruitful project.

Glad to help of what I could of done..

Sorry this project didn't go a smooth as you planned... But do come back if you have anything else.