Originally Posted by
mathew stouffer
And the primary drain line is sloped in the wrong direction, causing water to drain into the pan. You can see the water in the one photo.
Originally Posted by
mathew stouffer
Also the primary drain line is slope incorrectly and the water is draining into the pan not the drain.
Yeah, I didn't mention the reverse slope because you had already done so.
Originally Posted by
mathew stouffer
I questioned the condensate arrangement of this coil. It is above a garage and the safety pan and condensate line drain into the same drain.
I thought a secondary drain line was required to terminate at a different location. What are the requirements with this set up?
You are intermixing two terms: secondary drain line and safety pan drain line.
That does not have a "secondary condensate drain line", from my first response:
"Your photo shows only a primary condensate drain, no secondary condensate drain (you can see the blue plug in the secondary opening next to the primary condensate drain line)."
"Both the primary and secondary condensate lines require traps. There is no trap on the primary condensate line, and, there is no secondary condensate line at all."
"The secondary condensate line should be from that blue plug opening to a trap to the auxiliary drain pan. The auxiliary drain pan drain line does not need a trap (and none is installed, that's good)."
Now, back to what I think you are asking: The auxiliary pan (safety pan) does not require a drain line, it could have a cut-off switch. However, if it does have a drain line, that drain line is not supposed to be connected to the primary drain line, it is to be routed at Ted said - to someplace conspicuous where the homeowner will see it, typically the drain pipe is sticking through the soffit above a window.
That said, I don't think both are connection to the same drain line in that photo, if they are, you have a bigger problem.
It think both are going into the same chase, with two drain lines running down through that chase. One of those drain lines should be for the primary condensate drain line and the other should be for the humidifier drain line. Both should be properly trapped.
Then, the secondary drain from the a/c should drain into the auxiliary drain pan under the AHU, and the secondary drain line should be properly trapped. That auxiliary pan *does not require* a drain, however, if it has a drain line, it should be routed as stated above. It could have a drain line *or* a cut-off switch, I prefer both.
Finally, the humidifier should (I think, I really don't know much about humidifiers as all we ever do is dehumidify) have an auxiliary pan under it. I suspect that auxiliary pan could either be drained of have a cut-off switch too????
Now back to my "That said, I don't think both are connection to the same drain line in that photo, if they are, you have a bigger problem." ...
*IF* those *are* both draining into a single drain line, then the top of that drain line is *at the attic floor*. When that sucker backs up ... you get the picture ... *water is going to go everywhere*.
That's why I think that is just a chase for the two separate drain lines.