This manual covers National Vendors Snack & Refresh Center Vending Machines, specifically the Pre-PIE generation applicable to models 147, 148, 247, 248, 461, 462, 474, 475, and 476. These machines are engineered for reliable operation and feature hermetically sealed refrigeration units, operating on 115V AC, 60Hz electrical requirements. With typical dimensions ranging from 30-39 inches in width, 30-33 inches in depth, and 72-78 inches in height, and an unloaded weight of 400-600 lbs, they are designed for efficient product dispensing and storage.

This Programming Guide, provided in English, details essential operational and maintenance procedures. It covers critical aspects such as price setting, product configuration, and vend logic adjustments through the control panel and display. The manual also outlines recommended cleaning practices, sensor calibration, fuse replacement procedures, and provides information on diagnostic error codes. Furthermore, it addresses safety guidelines, including proper grounding and refrigerant type, ensuring optimal performance and longevity of your vending equipment.