Trane CLCP Manual page 9

Assembly & Installation CLCP
DAMPER INSTALLATION
12
SILICON
SELF DRILLING SCREW
Assembly & Installation
Piping - Condensate Drain
Units With More Than One
Pan Connections Drain Pan
On cooling section(s) the drain pan With the Trane QuantumTM Air
should always be connected directly Handler,
to a trap to ensure proper drainage
each module can be ordered with or
of condensate. without a drain pan. When more than
one module has a drain pan, you must
trap each module individually.
Connecting all drains to a common line
CAUTION
with only one trap will result in
condensate retention, and possible
Failure to provide adequate
water damage to the air handler or
condensate piping may result in
adjoining space.
water damage to the equipment or
building.
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
IMPORTANT
be installed on the drain connection.
Only modules handling condensate,
The applicable "rule of thumb" for
such as a cooling coil module or
amount of condensate may as high
eliminator module, require a trap.
as 6 lbs/hr/ton for units serving areas
Figure 9 through Figure 10 are
with high latent heat.
examples of typical installations.
Male-threaded, 1-1/2" BSPT conden-
sate drain connection is provided on
one side of the coil section. The main
Figure 9
drain lines and trap must be the same
Drain Pan Trapping for module under Negative Pressure
size as the drain connection.
Pitch the connection line horizontal or
downward toward an open drain and
install a plugged tee to facilitate
cleaning. Condensate 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 essentially non-
existent and the drain pan will likely
overflow.
Figure 10
Drain Pan Trapping for module under Positive Pressure
13
H = (1"of each 1"of
maximum negative
Normal Operation
pressure) + 1"
H
L J = 1/2 H
L = H + J + Pipe diameter +
J
Insulation
K = min. 1/2"
K
H = 1/2" plusmaximum
total static pressure
H