Our compressor is outside and our condenser is in the basement. The condensation water has a pump attached to it that pumps the water to the outside where it drains.
There is an additional pipe coming off of the pump that has cold air blowing out of it when the air conditioner is on. I’m guessing that it is an emergency overflow valve, but is it normal for cold air to be streaming out of this? It seems like we are losing a lot of nice cold air into our basement!
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The drain pipe going in to the condensate pump is supposed to have a trap on it to prevent air leaving the blower area through the drain. I am guessing you don’t have one.
I have never seen a second pipe like that. I would guess it was added to fix the fact the blowing air was spilling out water from the pump. They treated the symptom not the cause.
And it could be even if a trap is there the backpressure in the ductwork is high enough to still blow air through the trap. That is a bigger problem to deal with other than making sure all your vents are open.
Good Luck.
There are a considerable number of makers making circulating systems that employ the cold water line as the return line. The pump turns on when the water temperature drops below a set point, and then shuts off when the water temperature in the pipe reaches another set point. When the user turns on the pump it runs till hot water reaches the fixture and then the pump immediately shuts off.
You do not get ‘Instant Hot Water’ as the makers claim. Another class of systems that use the cold water line as the return line is the ‘Hot Water Demand Systems’.
