This manual provides an introduction to product functions, specifications, installation, basic operations and settings. This product is an OPEN TYPE device and therefore should be installed in an enclosure free of airborne dust, humidity, electric shock and vibration. The enclosure should prevent non-maintenance staff from operating the device (e.g. key or specific tools are required for operating the enclosure) in case that danger and damage on the device may occur. Be sure to read the manual carefully and follow the instructions herein so as to avoid injuries to personnel and damage to products. xiv