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STT40 / STT70
Maintenance 5-12
5.5.2. Replacing the regeneration heating coil
• Hazardous electrical current present.
Disconnect and lock out power before you replace heating
element!
Figure 6: Heating Coil Location and Disassembly
1. In order to gain access to the heating element, the cover plate on the side of
the dryer must be removed.
2. Remove the desiccant tank which has the faulty heater element from the
dryer.
3. Place desiccant tank onto a workbench and remove desiccant as stated
earlier in the changing desiccant section of this manual.
If the desiccant is old or damaged, you may discard it at this time. If it is
undamaged, place it in a bag and save it for later.
4. Unwire the heater that is located inside the bottom of the desiccant tank.
Remove and replace the heater with a new heater.
Rewire the heater and reassemble the desiccant tank.
5. Pour desiccant back into the tank. Use either the saved desiccant in the bag
or new desiccant if it is needed.
6. Put the desiccant tank back into the dryer cabinet.
7. Inspect the gaskets on the valve assembly. Replace if necessary.
8. Place the desiccant cell assembly back into the dryer and replace clamps.
9. Replace any internal hoses that were removed to change desiccant.
Heating Coil