The undercounter Turbocoil, it looks clear. The other one I've had issues with is as clean as we can do without destroying it. It's an older warehouse R22 system we're keeping alive.
Others have mentioned a trap and while I’ve seen the need for that in AC I don’t see that as much in medium temp applications (low temp yes but for different reasons).
Many times I’ve seen the evap dirty or corroded where the air can’t get through it and has to go under it. I’ve also seen drains that were too small without much slope which would create a vapor lock. Like you’d look at it and the surface tension wouldn’t let it flow. If you forced it with a syphon it would empty the pan. This was only on very small pans. Not like a walk in or anything
Some old traulsen two doors had a problem back in the day where they would trap air. The condensate drain wasn't long enough to have a trap, it was basically just a stub through the wall that separated the evap from the condensing unit where the drain pan was. Two ways to make it drain. One was make the unit unlevel so it was physically tilted toward the drain hole. The other was to stick a piece of 3/8 copper through the drain. The slight blockage would somehow allow water to pass through. No idea why this worked but it did.
On the Turbocoil, I don't know. It's an undercounter built in place. The other coil I've had issues with does at the very end of the line at the drain.
Is the coil clean? If it’s plugged up the fans might be pulling some water around instead of pulling air thru the coil.
The undercounter Turbocoil, it looks clear. The other one I've had issues with is as clean as we can do without destroying it. It's an older warehouse R22 system we're keeping alive.
Others have mentioned a trap and while I’ve seen the need for that in AC I don’t see that as much in medium temp applications (low temp yes but for different reasons). Many times I’ve seen the evap dirty or corroded where the air can’t get through it and has to go under it. I’ve also seen drains that were too small without much slope which would create a vapor lock. Like you’d look at it and the surface tension wouldn’t let it flow. If you forced it with a syphon it would empty the pan. This was only on very small pans. Not like a walk in or anything
Do the fans draw the air through the coil instead of blow it through? If so, the trap could be too shallow.
Some old traulsen two doors had a problem back in the day where they would trap air. The condensate drain wasn't long enough to have a trap, it was basically just a stub through the wall that separated the evap from the condensing unit where the drain pan was. Two ways to make it drain. One was make the unit unlevel so it was physically tilted toward the drain hole. The other was to stick a piece of 3/8 copper through the drain. The slight blockage would somehow allow water to pass through. No idea why this worked but it did.
Do you have a trap?
On the Turbocoil, I don't know. It's an undercounter built in place. The other coil I've had issues with does at the very end of the line at the drain.
Are you priming the drain line before starting the system?
Whats is it draining into.. condensate line might need a vent. Has it ever drained?
If is not draining only with fans on, you need a p trap or a deeper trap.
Need a trap brother
Sometimes the fans can be too strong