Defrost
Viper — Operation
-
Auto Defrost
The Viper utilizes a “Smart defrost” system. There is a 3-hour revolving clock that monitors the volume of product entering the barrels. Should anything less than ~40 to 45oz. per hour of FCB product per any barrel be dispensed within a 3-hour timeframe the barrel will perform a defrost. Only one barrel is allowed to be defrosted at a time. If a barrel is in defrost and a customer pours a drink from another barrel, defrost on that barrel will suspend until the other barrel(s) are frozen and satisfied. Located on each freeze barrel (evaporator) refrigeration outlet line is a thermistor (temperature sensor). Once the sensor reaches 41F, defrost will be terminated. The typical defrost and recovery is ~ 12 minutes. The minimum time for a Defrost cycle is 4 minutes with the maximum time for a Defrost cycle including suspension being 20 minutes.
Note: Motor calibration takes place at the end of a programmed defrost cycle to account for possible mechanical change.
-
Manual Defrost
In the barrel status screen the DEF button is for manual defrost. While a barrel is running and put into manual defrost, the defrost cycle will last for four minutes and then go back into freeze mode. When a freeze barrel is off and put into a manual defrost the defrost cycle will last for four minutes and then shut back off.
Note: Anytime the freeze barrel outlet refrigeration line reaches 41F the Viper will terminate a defrost cycle.
-
Defrost Lockout
Defrost lockout prevents the Viper from automatically defrosting during set times and is typically enabled if the Viper or a specific barrel is constantly in defrost during peak times. The defrost lockout affects all barrels at the same time and can be programmed to have 3 - three hour defrost lockout time slots, they can be individual or sequential for a maximum of 9 hours per day. Sequential defrost lockouts should be overlapped by 15 minutes to prevent Smart Defrost© from engaging.
