Power Failures

Continued from Page 20

Measuring resistance between locations A and C or B and D will always show “Open” because these locations are between the motor windings.

When the valve is opening or closing, the voltage measured between A and B or C and D should be between 20 to 22 VAC.

Measuring the DC volt of the EXV TEST pins, on the board, will also indicate if the expansion valve is open or close. 0 volts DC indicates the valve is closed. 5 volts DC indicates the valve is fully open. A value between

0 and 5 volts indicates how much the valve is open or close.

Power Failures

In the event of a power failure Beacon II will automatically close the expansion valve to prevent refrigerant from migrating throughout the system. After power returns, with 24 VAC at the board, the system will restart in the cooling mode after the four-minute hold off period.

Spare Sensor Terminals

Beacon II provides a set of input terminals for customers who may want to monitor an additional temperature or items such as Product Temperature. This input terminal requires a signal from a thermistor which meets the temperature/resistance values in Table 1 on page 22.

If a product temperature simulator is used it must meet the resistance/temperature specification listed in Table

1.The temperature range for this input is –30°F to 140°F. Sensors on the Beacon system, as supplied, will not simulate product temperature.

This input can be monitored on the LED display by using the “MONITOR” button and scrolling to SPt. The values displayed will be the temperature of the spare sensor.

Checking Sensors

DO NOT REMOVE SENSORS FROM EVAPORATORS FOR CHECKING.

Use the monitor button to display the value

the sensors are reading on the LED (suction temp. SCt, defrost temp. dFt or room temp.). Compare this value to the measured value with a thermometer at each of these points. If they do not match, change the sensor.

The sensors can be checked for their proper operation by placing it in a cup of ice water. Stir the ice water and measure the resistance of the sensor. At 32°F the resistance should be 32,650 ohms. If it is higher or lower by 5,000 ohms approximately, the sensor should be replaced.

H-IM-79E specifications

Heatcraft Refrigeration Products has long been a leader in eco-friendly and efficient cooling solutions, and the H-IM-79E is a prime example of their commitment to innovation and sustainability. Designed for commercial use, the H-IM-79E is a high-performance refrigeration unit ideal for supermarkets, convenience stores, and restaurants, where reliable temperature control is essential.

One of the standout features of the H-IM-79E is its energy efficiency. This unit employs advanced compressor technology that optimizes power consumption without sacrificing cooling performance. In addition, it is designed to minimize operational costs, making it an attractive option for businesses looking to reduce their energy bills while maintaining high standards of refrigeration.

The H-IM-79E integrates a robust refrigerant management system that uses environmentally friendly refrigerants, aligning with Heatcraft's commitment to reducing the carbon footprint of their products. This not only helps businesses comply with environmental regulations but also promotes a healthier planet for future generations.

Another key characteristic of the H-IM-79E is its superior temperature stability. The unit is equipped with precision temperature control technology that ensures consistent cooling performance, preventing temperature fluctuations that can compromise food quality and safety. This reliability is crucial in commercial settings where maintaining optimal storage conditions is essential.

The design of the H-IM-79E is also noteworthy. It features a compact footprint, allowing it to fit seamlessly into various commercial environments without taking up valuable floor space. Additionally, the unit is built with durable materials, ensuring longevity and minimizing maintenance needs.

User-friendly interfaces make the H-IM-79E easy to operate. It includes advanced monitoring and diagnostics capabilities, allowing business owners to track performance in real-time and address potential issues before they escalate. The incorporation of smart technologies means that operators can remotely monitor and control the system, providing flexibility and peace of mind.

In summary, the Heatcraft Refrigeration Products H-IM-79E stands out for its energy efficiency, eco-friendly refrigerant use, reliable temperature control, compact design, and user-friendly features. This combination of attributes makes it an ideal choice for businesses that prioritize both sustainability and performance in their refrigeration needs.