Temperature Guard Plus ,   Model: AR500-1 Additional Information Argo Temperature Guards are low cost, easy-to-use thermostat accessories designed for residential use or commercial application in areas such as temperature-sensitive computer rooms or for refrigeration monitoring in the food service industry. If the temperature goes beyond preprogrammed limits or if a power failure occurs the unit will dial up to four emergency numbers to alert the home or business owner. In addition to these features, the AR500-1 Temperature Guard Plus allows the added convenience of remotely controlling temperatureby phone. Home or business owners can set back temperature while they’re away, and reset it prior to their arrival with just a phone call! ·Monitors temperature,power and security (optional) via phone ·Controls temperature (up to 4 zones) via phone ·Programmable High/Low temperature limits ·Accepts 4 programmable emergency phone or pager numbers for call-out ·Installs quickly and easily between existing thermostat and boiler control ·Easy to program with recorded prompts ·Works with answering machine or fax on same phone line ·Features rechargeable 4 hour battery back-up with optional 20 or 30 hour extended battery available ·FCC approved and registered Brochure 240004974 - AR500-1 Rev. 11/08 393.3 kb Installation & Operation Manual 240004975 - AR500-1 Rev. AR50105 356.7 kb