Condenser Replacement & Controls Modernization
Modernizing an Active Production Facility
A meat processing and packaging facility in central Florida needed to modernize critical portions of its ammonia refrigeration system while maintaining production under strict operating and inspection requirements. The project included replacing two aging evaporative condensers and upgrading the broader R-717 system through a controls retrofit that incorporated targeted Variable Frequency Drive (VFD) upgrades.
Because refrigeration downtime directly impacts production, minimizing the loss of refrigeration was imperative. Innovative divided the project into separate condenser and controls shutdowns, allowing each scope to be carefully engineered, planned, installed, tested, and returned to service within scheduled outage windows.
The completed project replaced critical refrigeration equipment, expanded variable-speed control, and unified previously disconnected equipment under a single, open-protocol refrigeration controls platform.
Replacing Critical Refrigeration Equipment
Replacing both evaporative condensers during a single shutdown required detailed engineering, accurate field verification, and extensive preconstruction planning. Innovative developed the installation sequence well in advance, reducing field uncertainty and allowing work to progress efficiently once refrigeration was taken offline.
Both aging condensers were successfully replaced during the scheduled 12-hour loss-of-refrigeration shutdown.
VFDs were installed on processing evaporators. This provides more precise capacity control, supports steadier system operation, reduces unnecessary energy consumption, and increases plant efficiency.
Unifying and Modernizing the Controls System
Innovative began the controls retrofit by reviewing the available system documentation and performing a detailed field survey of the existing controls architecture. The controls team evaluated the existing cabinet, field wiring, and connected refrigeration equipment to determine how each component would operate within the upgraded controls platform.
Based on those findings, Innovative engineered a new PLC backboard and cabinet layout that accommodated existing field conditions while supporting the new controls architecture. The design also accounted for the limited shutdown window and the hundreds of field connections that needed to be transferred during the controls cutover.
During the scheduled outage, technicians disconnected the existing field wiring and systematically transferred each connection to the new backboard. The cabinet layout provided sufficient working space for multiple technicians to perform the cutover simultaneously, helping the team complete the work efficiently while minimizing downtime.
The retrofit incorporated new PLCs, updated control wiring, and additional field wiring throughout the facility, bringing previously disconnected equipment and operating data into one unified refrigeration controls platform.
Operators can now monitor and control connected refrigeration equipment from a centralized interface rather than relying onmultiple independent control systems located throughout the facility.
Integrating Existing Refrigeration Assets
The controls modernization extended well beyond replacing the PLC hardware.
Innovative integrated seven interstitial-space evaporators that had not previously been connected to the facility’s controls system, bringing them into the unified controls platform. VFDs were also installed on processing evaporators, allowing fan speeds to automatically adjust as operating conditions change.
The facility's screw compressors also received new microprocessors, improving communication with the controls platform while providing operators with more detailed operating information.
Innovative upgraded the ammonia detection system and added configurable text alerts that notify operators when defined conditions occur, allowing potential issues to be investigated before they affect the broader refrigeration system.
Once installation was complete, Innovative's startup engineers restarted the R-717 refrigeration system, verified control sequences, tested connected equipment, and documented field changes for incorporation into the final as-built drawings.
The controls modernization was successfully completed during the scheduled 15-hour loss-of-refrigeration shutdown.
Greater Visibility. Better Decisions.
A modern refrigeration controls platform should do more than start and stop equipment. It should provide operators with the information they need to understand current system conditions, identify abnormal operation, and respond more effectively.
The centralized operator interface now provides real-time visibility into connected refrigeration equipment, alarms, and system conditions. Historical trending allows operators to review what occurred before an abnormal condition developed, improving troubleshooting and operational decision-making.
Innovative also added motor run verification to the facility's existing motor control buckets. The controls platform now compares each run command with confirmation that the motor is actually operating. If a motor stops unexpectedly or fails to start, the system immediately alerts the operator, reducing reliance on manual equipment checks.
A new level probe installed in the high-pressure receiver provides real-time visibility into liquid ammonia level, allowing operators to monitor vessel conditions directly through the controls interface and respond when operating conditions move outside the expected range.
Together, these upgrades provide a clearer picture of refrigeration system performance while improving troubleshooting, maintenance planning, and day-to-day operation.
Controls Designed Around Production
The facility required a defrost strategy that supported its production schedule while maintaining efficient refrigeration system operation.
Runtime-based defrost initiates a cycle only after an evaporator's liquid line has accumulated a defined amount of operating time.This approach helps eliminate unnecessary defrost cycles while supporting more efficient system operation.
Innovative worked with the customer to develop a customized control strategy for different areas of the facility. Evaporators outside sensitive production areas continue to use runtime-based defrost, while evaporators above active production areas operate on scheduled defrost cycles to prevent temperature swings.
This customized approach protects production while allowing the facility to take advantage of runtime-based defrost where appropriate. It also gives operators greater flexibility and control over how each evaporator operates.
Why Refrigeration Controls Expertise Matters
Industrial refrigeration controls require more than general automation expertise. They require an understanding of compressor operation, evaporator control, defrost strategies, system pressures, and the way each component affects the refrigeration process.
Innovative combines controls engineering with industrial refrigeration expertise to develop integrated controls solutions specifically for refrigeration applications.
Every Innovative controls platform uses an open-protocol architecture, allowing facilities to modernize, expand, and integrate future equipment without being locked into proprietary technology. Whenever practical, Innovative also utilizes network communication with VFDs, compressor controllers, and other intelligent devices to provide more detailed operating information, simplify troubleshooting, and support future system expansion.
Project Results
Innovative successfully completed both retrofit scopes within their scheduled loss-of-refrigeration shutdown windows while maintaining the facility's production requirements.
The project delivered:
• Replacement of two aging evaporative condensers
• Expanded variable-speed control for condenser fans and processing evaporators
• A unified, open-protocol refrigeration controls platform
• Centralized monitoring and operation of connected refrigeration equipment
• Upgraded compressor communication
• Enhanced ammonia detection with configurable text alerts
• Motor run verification
• High-pressure receiver level monitoring
• Defrost strategies customized around the facility's production schedule
By preserving reliable mechanical equipment while modernizing critical refrigeration infrastructure, the project demonstrates howtargeted equipment and controls retrofits can significantly improve system performance without requiring complete system replacement.
The completed system provides operators with greater visibility, improved operational flexibility, and better control of the refrigeration process while positioning the facility for future expansion and long-term support.