Cornelius R-404A manual Units Equipped with HOT-GAS Defrost Systems

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DEFROST SYSTEMS

NOTE: The automatic defrost, “SLEEP” (SLEEP TIME), and “WAKE UP” (WAKE UP TIME) should be programmed into the Unit electronics by a qualified Service Person.

UNITS EQUIPPED WITH HOT-GAS DEFROST SYSTEMS

The Unit is equipped with both manual and automatic hot-gas defrost systems. The automatic defrost system may be programmed into the Unit to occur up to nine different times a day with a minimum of two hours be- tween defrost time settings or the system may be completely turned off.

Manual Hot-Gas Defrost System.

On the Two-Flavor Unit, the manual hot-gas defrost system may be activated at any time by pressing the ‘‘MANUAL DEFROST’’ switch on front of the Unit. The refrigeration compressor will operate for a short time, then both freeze cylinders will go into defrost and defrost for approximately 60-seconds. On the Four-Flavor Unit, The manual hot-gas defrost system may be activated at any time by pressing the “MANUAL DEFROST” switch on front of the Unit. The refrigeration compressor will operate for a short time, then both No. 1 and No.11 or No. 2 and No. 22 (depending upon which “MANUAL DEFROST” switch was pressed) freeze cylinder only will go into defrost and defrost for 60-seconds.

At the end of the manual defrost cycle, the Unit will return to normal operation. The manual defrost may be can- celled at any time by pressing the “CANCEL DEFROST” switch.

Automatic Hot-Gas Defrost System.

NOTE: The following paragraph describes the Automatic Hot-Gas Defrost system operation for the Two-Flavor FCB Dispenser No. 1 and No. 2 freeze cylinders. This paragraph also describes the Auto- matic Hot-Gas Defrost system operation for the Four-Flavor FCB Dispenser No. 11 and No. 22 freeze cylinders, which is identical to the No. 1 and No. 2 freeze cylinders.

The automatic hot-gas defrost system may be programmed into the Unit to occur up to nine different times a day with a minimum of 2-hours between defrost settings. At the start of each automatic defrost cycle, the refrig- eration compressor will operate for 30-seconds to pump freon out of the freeze cylinders evaporator coils. After freon has been pumped out of the freeze cylinders evaporator coils, No. 1 freeze cylinder only will go into de- frost cycle and defrost for approximately 7-minutes, then will return to normal operation. This ends the automat- ic defrost cycle of No. 1 freeze cylinder. No. 2 freeze cylinder will defrost 30-minutes after the start of No. 1 freeze cylinder.

The next automatic defrost cycle will occur according to the time programmed into the Unit. The automatic de- frost may be cancelled at any time by pressing the ‘‘CANCEL DEFROST’’ switch.

UNITS EQUIPPED WITH ELECTRIC DEFROST SYSTEMS

The Two-Flavor Overcounter (requiring remote condensing refrigeration) Unit is equipped with both manual and automatic electric defrost systems. The automatic defrost system may be programmed into the Unit to occur up to nine different times a day with a minimum of two hours between defrost time settings or the system may be completely turned off.

Manual Electric Defrost System.

The manual electric defrost system may be activated at any time by pressing the “DEFROST” switch on front of the Unit. The refrigeration compressor will operate for a short time, then both freeze cylinders will go into defrost and defrost for approximately 15-minutes. At end of the manual electric defrost cycle, the Unit will return to nor- mal operation. The manual electric defrost may be cancelled at any time by pressing the “CANCEL DEFROST” switch.

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Contents FCB POST-MIX Dispenser With V4 Features 404A Refrigerant Table of Contents Table of Contents cont’d FCB POST-MIX Dispensers with V4 Features List of FiguresThis page Left Blank Intentionally Safety Information This page Left Blank Intentionally Control Panel Switches Control Panel Keypad Security‘‘SYRUP PRIME’’ Switches Operating Controls FOUR-FLAVOR Unit Shown ‘‘FILL 1’’ and ‘‘FILL 2’’ Fault Messages Control Panel Display MessagesDefrost Systems Units Equipped with HOT-GAS Defrost SystemsUnits Equipped with Electric Defrost Systems ‘‘SLEEP’’ Sleep Time ‘‘WAKE UP’’ Wake UP TimeFaceplate Relief Valves Dispensing ValvesDispensed Product Conditions ‘‘OVERRUN’’, AS Applied to Frozen Carbonated BeveragesDrawing Operating Characteristics Adjusting CO2 RegulatorsOperating Unit Primary CO2 RegulatorAdjusting Brix WATER-TO-SYRUP Ratio of Dispensed Product Replenishing Syrup SupplySecondary CO2 Regulators Syrup Tanks SystemSyrup Flavor Change Replenishing CO2 SupplyBAG-IN-BOX System Cleaning and Sanitizing Daily Cleaning of Unit312030002 312030002 Cleaning Condenser Coil Unit with AIR-COOLED Refrigeration SystemUnit with Remote Condensing Refrigeration Troubleshooting Troubleshooting Control Panel Switches and Fault MessagesTroubleshooting Product Blender Tanks and Carbonators OperationTroubleshooting Dispensed Product Water Pump CyclingInstructed Warranty Page One Cornelius Place Anoka, Minnesota 612 800

R-404A specifications

Cornelius R-404A is a synthetic refrigerant blend widely used in various refrigeration and air conditioning applications. Composed primarily of three components—R-125 (44%), R-143a (52%), and R-134a (4%)—this blend is designed to provide effective cooling performance in both commercial and industrial environments. Its popularity can be attributed to its efficient thermodynamic properties, making it a suitable choice for low and medium temperature refrigeration systems.

One of the hallmark features of R-404A is its high energy efficiency. As a refrigerant, it offers excellent performance in heat transfer capabilities, which translates to lower energy consumption and operational costs. R-404A operates effectively within a wide range of evaporating temperatures, allowing it to serve various applications, from refrigerated display cases to cold storage facilities. The refrigerant's low glide temperature helps maintain consistent temperatures in these applications, enhancing food safety and product quality.

R-404A does not belong to the ozone-depleting substances category, making it an environmentally friendly choice. However, it is important to note that R-404A does have a significant global warming potential (GWP) of 3,922, raising concerns regarding its long-term environmental impact. As awareness of climate change increases, industries are shifting towards alternative refrigerants with lower GWPs, but R-404A remains prevalent in many existing systems.

In terms of compatibility, R-404A is non-toxic and non-flammable, making it a safe choice for use in commercial environments. Additionally, it is compatible with oils traditionally used in refrigeration systems, simplifying retrofitting processes when upgrading from other refrigerants. R-404A is also designed to work with standard refrigeration components, ensuring compatibility with existing equipment.

To maximize efficiency and performance when using R-404A, proper system design and maintenance are critical. Regular checks for leaks, appropriate charge levels, and routine maintenance can help extend the life of the system while ensuring optimal performance of R-404A as a refrigerant. As industries continue to adapt to evolving regulations and environmental concerns, the future of R-404A will likely involve the transition to lower-GWP refrigerants, but its robust features and performance continue to make it a staple in the refrigeration landscape.
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