Defrost / Alarms

Electric Defrost Mode

When a defrost is initiated, the EEV closes, the compressor is allowed to pumpdown and shut off. The evaporator fans are cycled off and the defrost heaters are energized.

On multiple evaporator systems, all controllers must terminate their defrost, either on temperature or fail-safe time, before the master controller will end the defrost cycle.

There is a 2 minute condensate drain-down period after which the compressor is started for a refreeze period. The evaporator fan stays off (fan delay). The refreeze period will last until the evaporator suction temperature is at 28°F or 3 minutes has elapsed. After this sequence, the system is back in the refrigerating mode and evaporators fans are now running.

Air Defrost Mode

The sequence is the same as for electric defrost except that there are no heaters and the evaporator fans run continuously. If the air defrost for motors are wired through the fan relay on the board, they will remain energized during defrost mode.

Alarms

Beacon provides a set of dry contacts for use in signaling an alarm. These contacts can be connected to a light, a buzzer, a bell etc., which will be activated when an alarm condition occurs. When the Beacon II is energized, the alarm contacts are OPENED. When an alarm condition is detected, the contacts are CLOSED.

Conditions under which the alarm contacts will close are:

•High Box Temperature – LED Display: A 1 - Room temperature has exceeded the Alarm High ALH value for the Alarm time ALt, programmed.

•Low Box Temperature - LED Display: A 2 - Room temperature has dropped below the Alarm Low ALL value for the Alarm time ALt, programmed

•System Start-up failure – LED Display: A 3 - Compressor pumps down and tries to restart after 4 minutes. After 4

unsuccessful attempts to restart, the alarm code A 3 is displayed. System continues trying to restart.

•Input Fault – LED Display: A 4 - Box Temp., Suction Temp., Pressure Transducer open or not installed.

•Power failure – Loss of power to the Evaporator

Alarm Codes

A 1 High Box Temp

A 2 Low Box temp

A 3 System Start-up failure

Compressor pumps down and tries to restart after 4 minutes

A 4 Input Fault

Box Temp., Suction Temp., Pressure

Transducer open or not installed

Clearing Alarms

Alarms A1 – High Box Temp. and A2 – Low Box Temp. will clear automatically if the Box Temp. decreases

or increases to below or above the Alarm setpoint temperature. Placing the system in the “SERVICE MODE” or turning off power will clear the A3 Alarm. Replacing the Room Sensor, Suction Sensor or Pressure

Transducer will clear the A4 Alarm.

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.