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STEAM COIL-TRAPPING
Steam coil condensate connections require specialized trapping practices. Properly trained tech-
nicians must be employed to ensure these requirements are met.
DRAIN PAN-TRAPPING
MATERIALS RECOMMENDED:
(Use the same or larger diameter than unit connection): Copper, Galvanized,
Black iron or PVC piping. (NOTE: Titan Air provides a male NPT pipe connection
ranging from ¾ inch up to 1 ½ diameter, depending on application, on every drain
pan.)
PROCEDURE:
IMPORTANT: Do not combine more than one drain pan per trap. In cold
climates the P-traps need to be protected against freeze-up.
NOTICE: Install the trapped drain line in accordance with all applicable codes.
IMPORTANT: Positive and negative pressure P-traps follow a similar concept;
however they are not interchangeable. Traps need to be properly sized for the
static pressure within the air handler cabinet.
First determine whether the drain pan is under negative or positive pressure.
DESIGN CONSIDERATION: Calculate static pressure at the drain pan for
worst case scenario.
Refer to the diagrams on the next page, utilizing the information gathered from the
step before, to calculate the proper sized P-trap needed.
If the drain line is installed downstream from an external trap, slope the line away
from the unit at 1/8 inch per foot of run.
Condensate disposal options:
Disposal of condensate directly onto the roof may be acceptable in certain
areas, refer to local codes.
IMPORTANT: If condensate is to be drained directly onto the roof a
small drip pad should in place to protect the roof from damage.
Another option for condensate disposal is for it to be piped into the building
drainage system. Criteria to meet:
Pipe should penetrate the roof external to the unit.
Installer still needs to include a P-trap whether it is installed inside or
outside the building.
A vacuum break or vent should be provided, after the trap, on longer
runs of drain line to ensure smooth flow of water.
