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Large Dehumidifying Dryers Maintenance 46
6. Inspect the gaskets on each of the covers. Replace if necessary.
7. Re-install the covers.
Figure 17: Desiccant Tower Assembly
Regeneration
Heater Cover.
High
Temperature
Gaskets.
Heater Element
Mounting Plate.
Access cover can be
removed in order to
replace desiccant.
Viewing Glass, for
checking the status of
the desiccant inside.
Regeneration
Heaters
High
Temperature
Gaskets.
Stainless Steel
Hollow Core
Desiccant Tank
Desiccant Tank
Mounting
Platform
Figure 18: Desiccant Replacement Amounts
Replacing the Process Heater (Electric Dryers)
Large Dryers have a number of single phase Calrod-type heater elements wired in a delta
formation. They are mounted on top of the dryer or to the drying hopper. The number and
wattage of the heaters varies with model, voltage, temperature range, etc., but the
replacement procedure is the same.
DANGER! Disconnect and lock out power before heater replacement.
Dryer Desiccant Required per Tower
CFM “13 X”, 8 x 12 Bead Total
600 175 350
850 175 350
1000 300 600
1250 300 600
1500 300 600
2000 300 1200
2500 300 1200
3000 300 1200