Minimal or No Control
If your cooling system isn't controlled properly, it cannot be optimised, only operated.
Many legacy cooling systems run continuously at fixed speeds with limited automation, poor instrumentation, and no defined operating strategy.
Vistech helps manufacturers redesign cooling system control and automation to reduce energy use, improve stability, and protect uptime.
If Your Cooling System Has No Data, It Has No Strategy
Most sites assume their cooling system is 'already optimised' because it has been running for years.
But if the system is not actively controlled based on demand, then optimisation is not happening. What's really happening is:
- Pumps run at constant speed
- Fans run at constant speed
- Setpoints are guessed
- Operators intervene manually
- Energy waste is accepted as normal
Poor Control Is a Direct Energy Cost Problem
Cooling systems consume significant electricity through pumping, fans, chillers, and auxiliary equipment. If control is minimal, the system typically runs harder than necessary for most of the year. That means the site pays for:
For large sites, poor control can quietly cost hundreds of thousands per year.
Common Signs of Poor Cooling System Control
You may have a control problem if:
- Pumps run continuously regardless of production demand
- Fans run at full speed most of the time
- Operators manually open/close valves to stabilise temperatures
- There is little or no trend data available
- No one knows what the system setpoints should be
- Temperature control is unstable in summer
- Cooling is "over-delivered" to avoid risk
- Flow and temperature instrumentation is missing or unreliable
- Control valves are bypassed or stuck open
- Cooling equipment is staged manually rather than automatically
Why Control Is Often Missing in Legacy Cooling Systems
Cooling system controls degrade over time for predictable reasons:
Undefined Philosophy
Original control philosophy was never properly defined
Failed Instrumentation
Instrumentation failed and was not replaced
Bypassed Controls
Operators bypassed controls to keep production stable
Fragmented Upgrades
Upgrades installed without integrating into the control system
How Vistech Fixes Control and Automation Problems
We don't just add sensors. We define the operating strategy first.
Typical scope includes:
- Development of a control philosophy and functional description
- Review of operating modes (winter/summer/part-load/peak load)
- Pump and fan staging strategy
- Valve control authority assessment
- Instrumentation requirements definition (flow, temp, pressure, energy)
- BMS / PLC integration scope definition
- Control optimisation to improve ΔT and reduce oversupply
- Definition of alarms, trending and monitoring outputs
- Commissioning and validation of performance
This ensures the cooling system responds to demand rather than running continuously.
Typical Outcomes of Control System Optimisation
Improved control often delivers:
Most Cooling Systems Waste Energy Simply Because Nobody Is Controlling Them
The most common cause of wasted energy is not old equipment. It's old operating logic.
A system running continuously at fixed speed will almost always waste energy, even if the equipment itself is modern.
Control is where optimisation becomes real.
How to Start
Most clients begin with an Efficiency Review to determine whether control issues exist and what the commercial opportunity looks like.
Cooling System Efficiency Review
£2,500 Fixed ScopeA structured on-site assessment designed to identify:
- Control deficiencies
- Instrumentation gaps
- Pump and fan overspend
- Operating mode inefficiencies
- Next-step roadmap
When Performance Monitoring Is Recommended
Where system behaviour is disputed internally, or where the ROI case needs evidence for investment approval, we may recommend a:
Performance Monitoring Study
£5,000 Fixed ScopeThis provides baseline pump/fan electrical consumption and system operating behaviour data. Monitoring strengthens the business case and prevents capital spend based on assumption.
Proven Across Large UK Manufacturing Sites
Food Manufacturing Site
Identified uncontrolled pump operation and poor staging. Defined new operating modes and automation strategy. Reduced wasted energy and improved stability.
View Case StudiesReady to Control Your Cooling System Properly?
If your cooling system runs continuously, relies on manual intervention, or has no meaningful trend data, it cannot be optimised.
We can help you define the right control strategy and deliver measurable improvements.
For established UK manufacturing sites with >500kW cooling load.Frequently Asked Questions
-
Can controls reduce energy without replacing major equipment?
Often yes. Many systems waste energy due to fixed-speed operation, poor staging and lack of demand response.
-
Do you provide PLC/BMS integration?
Yes. We define the full controls and automation scope, including instrumentation and integration requirements.
-
What's the difference between monitoring and control improvement?
Monitoring captures evidence. Control improvement uses engineering design and automation strategy to reduce energy use and improve stability.