Piping And Connection - Trane CLCP Euro 25 Installation Operation & Maintenance

Piping and Connection

Piping – Condensate Drain Pan
Connection
On cooling section(s) the drain pan should always be
connected directly to a trap to ensure proper drainage of
condensate.
Failure to provide adequate condensate piping may
result in water damage to equipment or building.
Male-threaded, 1-1/2" BSPT condensate drain connection is
provided on one side of the coil section. The main drain lines
and trap must be the same size as the drain connection. Pitch
the connection line horizontal or downward toward an open
drain and install a plugged tee to facilitate cleaning. Conden-
sate lines should not be connected to a closed drain. This is to
avoid the possibility of drawing sewer gasses into the unit.
Drain traps must be primed. lf they are not, the trap is essen-
tially non-existent and the drain pan will likely overflow.
Figure 13 Drain Pan Trapping for module
under Negative Pressure
Figure 13
H = (1" for each 1" of maximum negative pressure) + 1"
J = 1/2H
L = H + J + Pipe Diameter + Insulation
WARNING
Unit With More Than 1 Drain Pan
With the Trane QuantumTM Air Handler, each module can be
ordered with or without a drain pan. When more than one
module has a drain pan, you must trap each module individu-
ally.
Connecting all drains to a common line with only one trap will
result in condensate retention, and possible water damage to
the air handler or adjoining space.
If a module has a drain pan for cleaning purposes only, it does
not need a trap; however a cap or shut off valve should be
installed on the drain connection. Only modules handling
condensate, such as a cooling coil module or eliminator
module, require a trap. Figure 13 through Figure 14 are
examples of typical installations.
Figure 14 Drain Pan Trapping for module
under Positive Pressure
Figure 14
K = min. ½"
H = ½" plus maximum total static pressure
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