AEC AD Series - Replacing the Process Heater

Page 58 AD Series Dehumidifying Dryers
After cleaning each chamber, add a level layer of half the 8 x 12
bead desiccant on top of the screen. Next, carefully add the full
amount of bead desiccant specified per bed. Amounts are listed in
the Desiccant Amounts Table on the next page. Smooth the top
level, and finally add another layer of the remaining bead desiccant
to the top. Make sure this layer is level and smooth.
Repeat the previous step for the other bed.
Inspect the gaskets on the valve assembly. Replace if necessary.
Re-install the valve and reconnect actuator wiring.
Figure 14
Required Desiccant Amounts
Dryer
8 x 12 bead Total
model Part no. lbs.
Kg
AD15 4.75 2.15
AD30 12.25 5.56
AD60
W00018051
27.5 12.5
8-6 Replacing the Process Heater
The AD Series dehumidifying dryers utilize a single-phase
Calrod-type heater element. This heater element is mounted in the
center compartment below the desiccant beds. Although the
replacement procedure is the same for each heater, the wattage
varies by model, voltage, temperature range, etc.
WARNING!
HAZARDOUS ELECTRICAL CURRENT PRESENT.
Disconnect and lock out power before you replace
heater elements!