Ahu Condensate Drain Trap Design

To find the design condensate drain one needs to know the design inlet and outlet air conditions precisely the moisture content and air flow rate.

Ahu condensate drain trap design.

Trap failures due to blockage drying out breakage freeze up and or improper installation can compromise the s. The height required for a p trap is the last issue discussed. 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. When the coil section door was opened however the water in the pan drained very quickly.

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. The condensate s net column height in the trap h in the accompanying figures is less than the equipment s negative air pressure in inches of water column the condensate will be unable to drain t he condensate trap perhaps is the most overlooked item in the design and installa tion of fan coils and air handlers with cool ing. 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 drain pan overflow or water droplet carryover into. A c condensate drains pumps.

In an ahu the condensate drain pan normally rests on the unit floor. We went to the site and found that drain pan and the air handling unit floor was flood ed and the fan inside the air handler was wet. This article discusses the inspection and repair or un clogging of condensate disposal systems including air conditioning heat pump or condensing boiler furnace condensate drains condensate pumps and their proper installation as part of our review of condensate piping traps drains. The ahu floor is on a frame that varies in height from four inches light.

We had studied the design of the condensate trap. Codes installation leaks clogs connections troubleshooting repair.