*1The front face of the unit, installed in a solid panel, has been tested using conditions equivalent to the standards shown in the specification. Even though the unit’s level of resistance is equivalent to the UL50E TYPE 4X, oils that should have no effect on the unit can possibly harm the panel. This can occur in areas where either vaporized oils are present, or where low viscosity cutting oils are allowed to adhere to the panel for long periods of time. If the unit’s front face protection sheet peels off, these conditions can lead to the ingress of oil into the unit and separate protection measures are suggested.
Also, if non-approved oils are present, they may cause deformation or corrosion of the front panel’s plastic cover. Therefore, prior to installing the unit, be sure to confirm the type of conditions that will be present in the unit’s operating environment. If the installation gasket is used for a long period of time, or if the unit and its gasket are removed from the panel, the original level of protection cannot be kept. To maintain the original protection level, the periodical maintenance is essential.