P Trap Hvac Condensate Drain Line Design

Minimum maximum sea level.

P trap hvac condensate drain line design.

Three quarters of an inch is sufficient for up to 20 tons according to the imc unless the drain outlet size is larger than in ch use t able 307 2 2 for condensate pipe sizing. That is why in the summer your car drips water. W c 1 2 in. It s similar to the trap under your kitchen or bathroom sink.

As air conditioning caught on in the 50s p traps were the standard that every contractor field designed and installed even if it was unknown to them whether the drain pan was at. A p trap serves a very important purpose on an a c unit. Co ndes at r i p r ec om ndati. Since p traps seal against air leakage they were the natural solution to prevent air leaking in the condensate drains of early 1900s air conditioning units.

W c 1 in. What is a p trap you say. Air conditioning units pull a lot of water out of the air. See when moist air hits something cold the water condenses out of the air and collects on the cold surface.

Fan inlet pressure negative h figure 3. Minimum h fan outlet pressure in. Trap failures due to freeze up drying out breakage blockage and or improper installation can compromise the seal against air ingestion through the condensate drain line. Trap for draw thru unit condensate beginning to drain away.

A central air system routes condensation through a u shaped trap located in the drain line just outside the air handler. Condensate switches imc 307 2 3 states that all hvac equipment that produces condensate must have either a secondary drain line or a condensate overflow switch a secondary drain pan with a secondary drain line or condensate switch or some combination of these installations should be used to prevent overflow if the primary drain line blocks. Condensate drain pan h 2 minimum sea level when condensate begins to drain off h fan inlet pressure in. Traps with insufficient height between the inlet and outlet design deficiency on draw through systems can cause the drain to back up when the fan is on possibly causing.

All air conditioners have a special drain for.