ELECTRICAL CIRCUIT

CIRCUIT DESCRIPTION

As the manual on–off–circuit breaker switch is pushed to ”on”, an electrical circuit is completed to the gearmotor via the circuit breaker gearmotor overload, power relay / contactor, gearmotor delay thermostat and the bin thermostat. After the previous circuit has been completed the condenser fan motor will start as will the compressor (via the high pressure control and the compressor starting relay).

COMPONENT DESCRIPTION

BIN THERMOSTAT

This is electrically in ”series” with the ice making system. when the bin is full, the contact opens, terminating power to the machine.

GEARMOTOR START RELAY

This is a current type relay which means as the gearmotor run winding comes ”on” the line, the current draw initially is relatively heavy through the relay coil (coil is in series with run winding). It then acts like a normal relay and the N.O. start contact ”makes”, completing a circuit through the start capacitor to the start winding. As the gearmotor picks up speed, the amp draw through the relay coil drops off allowing the armature to return to its normal position (start contact ”opens”). This action removes the start winding from the circuit.

POWER RELAY / CONTACTOR

This relay controls the compressor power only.

GEARMOTOR DELAY THERMOSTAT

This thermostat keeps the gearmotor running until the suction line temperature reaches 45_ after the full bin switch terminates power to the power relay / contactor.

ON–OFF SWITCH / CIRCUIT BREAKER

This switch interrupts power to the entire unit. The switch has a circuit breaker incorporated into its’ design. This circuit breaker will trip out in the event the gearmotor draws to high of amps In such an event the power is interrupted to the unit. To reset the circuit breaker and reestablish power to the unit, push the switch to the ”off” position and then back to the ”on” position.

FAN CYCLING SWITCH (R404a Units)

The function of this switch is to maintain condensing pressures at a satisfactory level during–low ambient conditions. The switch breaks the circuit to the condenser fan motor at 205 PSI and makes the circuit at 275 PSI.

HIGH PRESSURE CONTROL

The high pressure cut out is electrically in series with the power relay. As the head pressure rises to 450 PSIG for R404a charged units and 400 PSIG for R 22 charged units, a preset level, the contact opens thus breaking the circuit to the compressor via the power relay contactor. This control must be reset manually on R404a units.

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Cornelius 2400 (R404A), 750 (R404A), SERIES 1100 (R22) service manual Electrical Circuit, Component Description
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2400 (R404A), SERIES 1100 (R22), 750 (R404A) specifications

Cornelius 750, 1100, and 2400 are part of a line of refrigeration systems designed to meet the diverse needs of various industries, including food service and beverage dispensing. Each model utilizes specific refrigerants—R404A for the 750 and 2400, and R22 for the 1100—highlighting their engineering innovations and operational efficiencies.

The Cornelius 750 (R404A) is engineered for optimal performance in demanding environments. It is noted for its compact design, making it ideal for applications where space is limited. With advanced thermal management technologies, it guarantees rapid cooling and maintains temperature integrity, which is crucial for preserving the quality of stored goods. The energy-efficient compressor employed in this model not only reduces operational costs but also minimizes its environmental footprint, adhering to modern sustainability standards.

Similarly, the Cornelius 1100 (R22) is a robust refrigeration unit best suited for larger scale operations. It features heavy-duty construction and advanced coil technology, which enhances its heat exchange efficiency. The R22 refrigerant used in this series is well known for its effectiveness in high-temperature environments, making it a preferred choice for various cooling applications. Despite the phase-out of R22, systems utilizing it remain widely in service, offering reliability and performance that many operators depend on.

The Cornelius 2400 (R404A) is designed for high-capacity applications, tailored to meet the demands of busy food service environments. One of its standout features is its ability to maintain consistent temperatures even under heavy load conditions. This model incorporates enhanced insulation and improved airflow mechanisms that contribute to reduced energy consumption. The use of R404A refrigerant allows for robust cooling performance while also being more environmentally conscious than older refrigerants.

All three models emphasize advanced features such as electronic controls, customizable settings, and diagnostic capabilities, allowing for easy monitoring and maintenance. These technological enhancements not only improve operational efficiency but also extend unit longevity, saving users time and money in the long run.

In summary, the Cornelius 750, 1100, and 2400 refrigeration series showcases a combination of reliability, efficiency, and performance attributes. Their unique refrigerants, advanced cooling technologies, and innovative design make them ideal choices for varied refrigeration needs in the commercial sector.
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