Cornelius R-134A service manual Operating Controls, Daily PRE-OPERATION Check

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OPERATOR’S INSTRUCTIONS

This section covers operating controls, daily pre-operation check, Unit operation, adjustments, replenishing CO2 and syrup supplies, cleaning and sanitizing, checking the drop-in refrigeration assembly condenser coil for restrictions, checking the ice water bath, water pump yearly maintenance, and periodic cleaning of the CO2 gas check valves.

WARNING: Disconnect electrical power to the Unit to prevent personal injury before attempting any internal maintenance. Only qualified personnel should service the internal components or electrical wiring.

CAUTION: Do not place or store anything on top of the Unit.

OPERATING CONTROLS

(see Figure 5)

DISPENSING VALVE LEVER

The dispensing valve lever, located on bottom of the valve, needs only to be pressed with cup or glass to dis- pense product.

DISPENSING VALVE WITH WATER LEVER

The dispensing valve water lever will dispense only water when actuated.

DISPENSING VALVES KEYED LOCK-OUT SWITCH

The dispensing valves keyed lock-out switch, located on the left side of Unit (see Figure 5), must be in the “ON” (vertical) position to operate the electric dispensing valves. The keyed lock-out switch in the “OFF”(horizontal) position turns off electrical power to the dispensing valves only, but the refrigeration system will continue to operate.

UNIT POWER SWITCH (115 VAC, 60 HZ UNITS ONLY)

The Unit power switch, located on the right side of the Unit (see Figure 5), must be in the “ON”position before the Unit will operate.

CARBONATOR WATER PUMP MOTOR POWER SWITCH

The carbonator water pump motor power switch, located on the refrigeration assembly control box, (see Figure 5), must be in the “ON”position before the carbonator water pump motor will operate. The purpose of the power switch is to turn off the carbonator water pump motor for service and maintenance. THE WATER SUPPLY TO THE CARBONATOR WATER PUMP MUST BE TURNED ON BEFORE RESTARTING THE CARBONATOR. STARVING THE WATER PUMP OF WATER WILL DAMAGE THE PUMP.

DAILY PRE-OPERATION CHECK

1.Check CO2 cylinder regulator assembly 1800-psi gage and if the gage indicator is in the shaded (“change CO2 cylinder”) portion of the dial, the CO2 cylinder is almost empty and must be replaced.

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Contents Installation/Service Manual This Document Contains Important InformationTable of Contents Table of Contents cont’d Troubleshooting Refrigeration System Compressor Operates Continuously but does not FormSafety Information Page This page Left Blank Intentionally General Description Unit DescriptionWarranty Reference Information Theory of Operation Flow Diagram FIVE-FLAVOR Unit with BUILT-IN Cold Carbonator Flow Diagram SIX-FLAVOR Unit with BUILT-IN Cold Carbonator This page Left Blank Intentionally Unpacking and Inspection Identification of LOOSE-SHIPPED PartsSelecting Location Installing UnitConnecting Plain Water Source Lines to Unit Cutting Hole in CountertopSyrup Inlet Supply Line Connections SIX-FLAVOR Unit Shown Connecting Syrup Source Lines to Unit Sealing Unit Base to Countertop Connecting CO2 Source Line to UnitPreparing Unit for Operation Fill Water Tank and Start Refrigeration SystemUnit Operation UnitAdjust WATER-TO-SYRUP Ratio Brix of Dispensed Product 312027000 Operating Controls Daily PRE-OPERATION CheckUnit Operation AdjustmentsCleaning and Sanitizing Replenishing CO2 SupplyChecking ICE Water Bath Cleaning CO2 GAS Check ValvesSanitizing Syrup Systems This page Left Blank Intentionally Hood and Front Panel Removal Front Access Panel RemovalPreparing Unit for SHIPPING, STORING, or Relocating Periodic InspectionDispenser Components Adjusting Dispensing Valves Water Flow Rate SF-1 Dispensing ValveUF-1 Dispensing Valve Adjusting WATER-TO-SYRUP Ratio Brix of Dispensed Product Cleaning DROP-IN Refrigeration Assembly Condenser Coil Cleaning Water Tank Water Tank Wash Syrup Systems Sanitizing POST-MIX Syrup SystemsFlush Syrup Systems Sanitize Syrup Systems Water Flush Syrup SystemsPurge Water OUT of Syrup Systems Restore Operation 312027000 Water Strainer Screen and DOUBLE-LIQUID Check Valve Liquid Check Valve Assembly Syrup Tank System Cleaning CO2 System CO2 GAS Check ValvesSyrup Flavor Change BAG-IN-BOX Syrup SystemWiring Schematic for Electronic ICE Bank Control Optional 560001023 301112002 301112002 Wiring Diagram SF-1 Dispensing Valve This page Left Blank Intentionally WATER-TO-SYRUP Ratio Troubleshooting POST-MIX System SystemTOO LOW or TOO High Comes OUT Dispensed ProductCarbonation TOO LOW Dispensing Valve Clear But Foams in CUP or GlassFrom ALL Dispensing Produces Foam AS ITLeaves Dispensing VALVE.CONT’D No Product Dispensed ValvesTroubleshooting Refrigeration System Not Form Sufficient ICE Bank Compressor OperatesContinuously but does Agitator Motor notWarranty Page One Cornelius Place Anoka, Minnesota 612 800
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R-134A specifications

Cornelius R-134A is a refrigerant commonly used in various cooling and air conditioning applications. It belongs to the hydrofluorocarbon (HFC) family and has become a favored alternative to many ozone-depleting substances. Unlike its predecessors, R-12, which has been phased out due to its detrimental effects on the ozone layer, R-134A offers a more environmentally friendly solution, albeit still having global warming potential.

One of the main features of R-134A is its favorable thermodynamic properties. It exhibits a low boiling point of approximately -26.3°C (-15.3°F), making it suitable for various refrigeration applications, including automotive air conditioning, commercial cooling systems, and domestic refrigerators. Its efficiency is regarded as superior, allowing for quick heat absorption and dissipation. This efficiency translates into energy savings, ultimately benefiting both consumers and manufacturers.

R-134A also boasts a relatively high vaporization heat, demonstrating its effectiveness in heat transfer processes. The low toxicity and non-flammability of R-134A further enhance its appeal, as it poses minimal risk during handling and application. This characteristic makes R-134A safer for technicians and users compared to older refrigerants, which presented higher health hazards.

Within modern technologies, R-134A plays a crucial role in both chiller systems and heat pump applications. It is compatible with various lubricants, allowing manufacturers to utilize R-134A in existing systems with minimal modifications. However, it is essential to use the correct type of oil, as mixing different types can lead to system inefficiencies and potential failure.

Despite its advantages, R-134A has a global warming potential of around 1,430 times greater than carbon dioxide, prompting the refrigerant industry to look for alternatives. Newer refrigerants, such as R-1234yf, offer lower environmental impact, driving a shift towards more sustainable options.

In conclusion, Cornelius R-134A remains a widely used refrigerant known for its efficiency, safety, and effectiveness in heat transfer. While it has played a significant role in the refrigeration and air conditioning industries, the ongoing search for eco-friendly alternatives highlights the need for continued innovation and adherence to environmental standards.
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