How to maintain the aluminum heating band?
For cast aluminum heating coils, use a megohmmeter to measure the U, V, W and PE terminals of each cast aluminum heating tube set in the switchboard, record the insulation resistance value, and ensure that the cold resistance is not less than 2MΩ. Use a multimeter to measure the resistance value between U, V, W phases of each group of cast aluminum heating tubes in the switchboard. Daily maintenance of cast aluminum heating ring:
1. The shell is not damaged.
2. The cable sealing joint of the junction box should be reliably sealed, and there should be no obvious connection gap by visual inspection.
3. In the cast aluminum heating tube control cabinet, the indicators are normal. SCR power adjustment is normal. The contactor is normal for pick-up and release.
4. The connecting wire is not aging or damaged.
Cast aluminum heater is currently one of the ideal heating pipes. An insulation layer can be added to the outside of the heating pipe according to user needs, which has higher thermal efficiency and can save about 30% of electricity. With the widespread use, there are many problems in use, so we need to pay special attention to the following situations:
Aluminum melting occurs during the use of cast aluminum heaters. This phenomenon must be caused by overheating of the operating temperature. The normal working temperature of the cast aluminum heater is 10-350 degrees, and the melting point is between 500-600. The phenomenon of melting must be caused by the over-temperature of the internal heating element, which causes the external aluminum to melt. Common causes of over-temperature:
1. The temperature sensor is not accurate;
2. The thermostat is out of control. Therefore, the temperature control equipment is the first choice for the phenomenon of aluminum melting during use.
The common reasons why the cast aluminum heating tube does not heat when energized:
1. There is dust in the insulating porcelain cap of the terminal; 2. The heating wire inside is broken.
Clean the inside of the insulating ceramic cap of the terminal first, and then measure the resistance. If there is still no resistance, then the heating wire inside is broken, just replace it in time.
