Keep the High Performance Dehumidification Systems for Long Time(Maintenance Tips)

With the arrival of the peak season for dehumidifier demand, dehumidifiers have become increasingly important, especially in some important production processes.

 

Maintaining tips

 

With the arrival of the peak season for dehumidifier demand, dehumidifiers have become increasingly important, especially in some important production processes. If there is a problem with it, the consequences may be very serious.

 

Recently, many customers have been asking how to ensure the long-term, stable and high performance of the machine.

 

At this time, correct maintenance becomes particularly necessary.

 

Now we will explain some maintenance steps and tips for desiccant dehumidifiers. At the same time, we also list solutions to some common problems.

 

Here is section of 1000m3/h model, let's use it as a sample to study

 

1kg-50kg Ozone Generator

 

This desiccant dehumidifier can working for a long time and only need few maintenance work in fact, however, it is sure that the maintenance is beneficial for the dehumidification equipment. The frequency of the maintenance depends on the operation conditions and the quality of the installation environment. If the process air have more dust, more maintenance work will be required.  Accordingly, the proposal is that maintenance cycle could be adjusted according to the actual condition, normally, do it once a half year at least. If maintain undeservedly, the equipment of dehumidification performance may be reduced.

 

- Before open panels, the dehumidification equipment shut down about 15 minutes, make sure the heating device cools completely

- Cut off the main power before any maintenance work

- There is a high temperature area (reactivation heating section) in the dehumidification equipment, so, cooling down completely

then start maintenance.

 

Filter unit

 

 

This devices equipped two independent filter devices, including one for process airflow, the other is for reactivation airflow.

 

Filter devices are installed in the entrance of airflow, cleaning the air entering dehumidification devices. Clean or replacing filter device should be according to  the quantity of dust particles in air. Do not operate machine without filter devices, because the dust impurities may go into machine and damage desiccant wheel.  Checking one time per a month .

 

Desiccant Wheel/Rotor

 

 

General maintenance is not needed in normal. However, if it is necessary to carry out the maintenance wok, using compressed air to clean it. For serious pollution of the wheel, washing it, but frequency of cleaning is not overmuch.

 

Motor(s)

 

 

The motor is equipped with bearing, whose service life is the same with motor's, so, no additional maintenance. Every year checking

one time ensure that it's normal.

 

Heating unit(1000m3/h model and larger models uses heating pipe heater, and small models use the PTC heater)

 

Heating pipe heater

 

PCT heater

No additional maintenance. Every year checking two time ensure that it's normal.

 

Driving belt

Regularly checking belt tension. Belt tension equipment should be adopted to check belt tightness.

 

Trouble Removal

 

Malfunction	Possible cause of trouble	Corrective action
None, or reduce dehumidification capacity	Filter clogged	Clean or replace filters
	Electrical heater faulty	Check fuses
	Airflow reduced	Check openings and dampers
	No rotation of rotor	Check belt tensioning and drive motor
	Internal leakage in unit	Check springs
	Altered air volumes	Measure and Check air volumes
	Altered reactivation temp.	Check reactivation heater
	Air leakage	Check panel and casing
Main fuse faulty	Fan faulty	Check fans and motors
	Too large air volume	Check air volumes and dampers
	No rotation of rotor	Check drive motor and belt
	Reactivation heater faulty	Check reactivation heater
	No power supply	Check main fuse
Dehumidifier does not start	No control circuit	Check control fuses
	Faulty control circuit	Check external start/stop signal
	Fuse for controls faulty	Check main fuse and phase sequence and other electrical components
Rotor does not rotate	Drive belt is slipping	Check belt tensioning
	Drive belt broken or worn	Check drive belt
	Rotor jammed	Check centre shaft, rim of rotor
	Drive motor faulty	Replace complete gear motor
No dry or wet air	Filter clogged	Clean or replace filters
	Fan faulty	Check fan, motor and impeller
	Wrong phase sequence	Check main fuse and phase sequence
	Ducts blocked	Check dampers and ducts

 

-Written by Ant dehumidifier team

on 26 Mar 2025