Lochinvar combustion chamber full of water

[kkillinger]

We have a Lochinvar TNR-150-100 natural gas unit that has been a nightmare for us. Every few months we have to have the top taken apart and use a shop vac to suck out 3-5 gallons of water that is trapped in the combustion chamber. We later found out that the air intake for the unit was sharing a line with a furnace and that has since been corrected. The unit now pulls air from the mechanical room. We also were instructed to turn up the temp. to help. All of this has been done and the contractor is here again today working on it. My guess is it is full of water again inside the combustion chamber. We only have 3-6 people in the fire station using this unit so it cant be over worked. Any thoughts?

[flange]

probably underworked and seeing condensation of the flue gases....

[kkillinger]

I just spoke with tech support and we came up with a theory that since the internal part of the chamber is rusty from water sitting in it for so long that the drain at the bottom is getting plugged up by rust. Would you aggree with this? Also we have another unit the same size that is only running a washer and a shower that is never used but we have never had issues with water in the chamber.

[flange]

could be. cant see it from here. ....