Servicing The Dew Point Monitor; Replacing The Process Heater - AEC ACM Series Operation And Installation Manual

8-3

Servicing the Dew Point Monitor

CAUTION!
8-4

Replacing the Process Heater

WARNING!
HAZARDOUS ELECTRICAL CURRENT PRESENT.
Disconnect and lock out power before you replace
heater elements!
Page 52
Inspect for holes and tears by looking though the filter
toward a bright light. Check for damaged gaskets or dented
metal parts. Do not re-use a damaged filter!
• Check the gasket for damage. A damaged gasket allows
contaminants into the process. Replace as needed.
The accuracy of the dew point monitor on mini dryer systems
depends on proper operation of the dew point sensor and the
control board. The dew point sensor is in the process air stream
and is therefore susceptible to contamination.
Dew point sensor life depends on:
• Air temperature and flow passing over the sensor.
• The amount of fines (dust) in the process air.
Once every six months, the dryer operator should monitor the
initial dew point sensor readings and establish a periodic
replacement schedule as needed.
Do not attempt to check the continuity
or resistance of the dew point sensor.
The sensor will be destroyed!
The ACM 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.
ACM Series Dehumidifying Dryers