P Trap Hvac Condensate Drain Line Design

The pull of the water to the drain has to exceed the sucking of the supply fan negative pressure rule of thumb add 2 5 to the static pressure before the fan return and internal to the unit and that s the long end.

P trap hvac condensate drain line design.

A p trap serves a very important purpose on an a c unit. W c 1 2 in. Trap for draw thru unit condensate beginning to drain away. All air conditioners have a special drain for.

Air conditioning units pull a lot of water out of the air. Minimum maximum sea level. A central air system routes condensation through a u shaped trap located in the drain line just outside the air handler. 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.

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. See when moist air hits something cold the water condenses out of the air and collects on the cold surface. Co ndes at r i p r ec om ndati.

Do you know the proper way to size a p trap on an hvac unit. What is a p trap you say. Condensate drain pan h 2 minimum sea level when condensate begins to drain off h fan inlet pressure in. Drain s 2015 imc 307 2 2 requires that an air conditioning condensate drain inside diameter should not be smaller than in ch and should not be smaller than the drain pan outlet diameter.

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. W c 1 in. It s similar to the trap under your kitchen or bathroom sink. Minimum h fan outlet pressure in.

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.