Condensate Drain - Watts AERCO Modulex EXT Series Technical Application Manual

Modulex EXT Series Piping

CONDENSATE DRAIN

SECTION 7: CONDENSATE DRAIN
To maintain proper flow of condensate, the drain pipe must have a slope toward the drain of at least 3/8
in./ft. (30 mm/m). The liquid column inside the condensate siphon needs to be filled with water after
installation. Its minimum height when all the fans are in operation must be at least 1 in. (25 mm). In order
to prevent ice from forming, the condensate piping must be well insulated. In outdoor applications
exposed to freezing temperatures, condensate piping must be installed to prevent freezing. AERCO
recommends the installation of standard heat-tape.
A typical condensate drain installation is shown in Figure 11. The parts required to fabricate the
condensate drain system are shipped with the accessory kit which is packed separately.
Polypropylene pipes are included with each unit. It is important to note that this pipe must be cut to the
appropriate length for the Modulex model and prevailing conditions at the installation site. A
polypropylene to PVC adapter is provided if a longer condensate drain is required.
Consult local codes with regard to condensate neutralization. Neutralization can be obtained by mixing
it with the buildings drain water or with limestone, which normally have a base pH. AERCO offers a
condensate neutralizing tank for the purpose.
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10.07.2010
Application Guide
Figure 14: Typical Condensate Drain Installation
Figure 15: Condensate Drain Assembly Components
AERCO International, Inc. • 100 Oritani Dr.
Phone: 800-526-0288
Blauvelt, NY 10913 TAG-0099