AEC WD 350 through WD3000 Dehumidifying Dryers - Manual (Page 25)

Installing Air Hose
Water-Cooled Aftercooler for WD50MR Dryers
Air is routed from the bottom of the aftercooler up through the top.
• Connect the hot incoming air hose from the drying hopper to the bottom 2” (about 51 mm)
tube stub with a hose clamp.
• Connect the cooled outgoing air hose to the 2” (about 51 mm) tube at the top of the cooler.
Run this hose to the inlet of the process air filter on top of the dryer.
Figure 9
Aftercooler Design Specifications
Entering air temp. Leaving air temp. Entering water temp. Leaving water temp. Initial flow rate
ºF ºC ºF ºC ºF ºC ºF ºC gpm lpm
250ºF 121ºC 130ºF 54ºC 80ºF 27ºC 85ºF 29ºC 3 gpm 11 lpm
Installing Water Lines
WD50MR/FR Models
• Use the ½” (about 13 mm) brass pipe nipples for water line connections. Connect the
entering water line to the pipe nipple, located in the center of the cover.
• Make sure you grip the nipple tightly when attaching a fitting. Doing so prevents damage
to the soft copper coils. You should make connections with flexible hose to allow removing
the coil assembly for cleaning.
• The aftercooler is designed to utilize either tower or city water as warm as 85ºF (29ºC).
Recommended flow rate is one to three (1 to 3) gallons per minute (4 to 11 liters per
minute).
Important!
You must use an aftercooler on WD50MR/FR models to operate
at process supply temperatures of 180ºF (82ºC) or below.
You are required to use a chilled water supply of 50ºF (10ºC) to
pre-condition the dryer return air so the dryer can properly
achieve low dew points and process temperatures.
If an aftercooler is used with a drying system, AEC highly recommends that a
high temperature return air filter element is substituted for the standard
element. Order Part No. A0538636 from the AEC/Whitlock Parts Department.
Page 24 WDMR and WDFR Series Dehumidifying Dryers