Cotes C35 - Section 6; Service and Repair; How to Service and Repair this Dehumidifier

COTES C35 OPERATING AND SERVICE HANDBOOK page 48/71
SECTION 6 / SERVICE AND REPAIR
HOW TO SERVICE AND REPAIR THIS DEHUMIDIFIER
Service and maintenance work on this dehumidifier
Cotes designs its dehumidifier units so that they are as robust as possible, and only need a
minimum of service and maintenance.
None of the components require lubrication or adjustment.
The only maintenance work you need to do is listed below.
Once a month
• Check or replace the filters for incoming air and regeneration air. For Configuration-B,
Configuration-C and Configuration-D, the filter guard will automatically provide a warning if
there are problems.
• Check that the fans are operating (by listening to check whether they are turning).
Once a year
We also recommend the following annual checks.
• Check the service indication menu in the PLC controller. Are the working hours of any
component inside near their time-to-change limit? If so, replace. See time-to-change limits
below:
o Process air filter. Depends on the working environment. Specified for 8,700 hours
under normal conditions.
o Regeneration air filter. Depends on the working environment. Specified for 8,700
hours under normal conditions.
o Air filter for electrical box. Depends on the working environment. Specified for
8,700 hours under normal conditions.
o Process air fan: 40,000 hours
o Regeneration air fan: 30,000 hours
o Motor and gear for rotor: 30,000 hours
o Heaters: 40,000 hours
o Filter guard (if installed): 40,000 hours
o Manometer (if installed): 40,000 hours
o Rotor, including gaskets: 60,000 hours
o Electrical board including PLC controller: 60,000 hours
• External humidity sensor should be calibrated or replaced (with recycled instruments)
• Internal humidity sensor (only Configuration-D) should be replaced (with recycled instruments)
• Check the wear on the rotor gaskets, especially the gasket placed on the circumference of the
rotor. The red side of the gasket is made of Teflon®, and this coating must be intact over its
entire surface.
• Check the inside of the cabinet for any signs of dirt or corrosion. Check that the drive belt for
the rotor is still tight and that no parts of it are too worn or close to the breaking point.