AEC WD 350 through WD3000 Dehumidifying Dryers - Manual (Page 12)

Figure 4
WDFR Series Floor-Mount Dimensions
FMASSY
6"
B
C
D
15.2 cm
2" OD (about 51 mm)
delivery to hopper
2" OD (about 51 mm)
return from hopper
A
Process Dew Point
10
DEW POINT (F)
35
40 -
- 30 - 25 - - 20 - - 15
OFF
Temperature Process Delivery Temperature Process Delivery
ON
5 0 - High Dew Point
In Regen Left Bed In Regen Right Bed
Heater on
Left Bed
Heater
Process Air Temp
Righp Bed Heater
HI-Process
888
WD10FR, WD25FR, WD50FR floor-mount dimensions in inches/cm
WD10FR WD25FR WD50FR
Dimension in. cm in. cm in. cm
A 12 1 /
2
31.8 12 1 /
2
31.8 14 35.6
B 32 1 /
2
82.6 33 83.8 41 104.2
C 24 1 /
2
62.2 27 68.6 34 86.3
D 23 58.4 25 63.5 32 81.3
E 16 40.6 18 45.7 18 45.7
1-7 What is Desiccant?
Desiccant is a material that attracts and holds (absorbs) water from the air. The desiccant
AEC/Whitlock dryers use is a synthetic crystalline metal aluminosilicate blended with a clay
binder and formed into beads.
Absorbed water is driven from saturated desiccant by heating it to a high temperature (reducing
desiccant capacity to hold water) and forcing air through it. This moisture removal process is
called regeneration.
1-8 The Process/Regeneration Cycle
AEC/Whitlock WDMR and WDFR dryers have two desiccant beds. While one bed is on-line in
the process air loop, the other is off-line, being regenerated.
When a desiccant bed is on-line, it absorbs moisture from the process air. In time, the bed
becomes saturated with moisture and needs to be regenerated. The dryer automatically redirects
the process airflow to the second bed, and starts the regeneration cycle on the first bed.
WDMR and WDFR Series Dehumidifying Dryers Page 11