Suction pressure
Reset against real load so the plant does not chase a colder evaporating temperature than the room needs
Stage 3 of 4: Correct
Plant tuned for how it actually runs
Refrigeration plant is usually commissioned once and never revisited — setpoints drift, controls fight each other and compressors short-cycle — correcting the settings needs no new hardware and shows up on the next bill
- 50 to 70% fewer starts per hour, typical
- 2 to 3% compressor power per degree of lower condensing temperature
- 0 new hardware for most corrections
- 1 by 1 changes, each one logged
Figures on this page are typical or illustrative ranges from our method, not audited results for a named site — your own baseline sets the real numbers
Fewer starts, steadier running
Starts per hour is one of the best single indicators of how hard a compressor is being worked — good sequencing replaces a ragged on-off pattern with fewer, longer, smoother runs
Before: frequent starts12
After: fewer, longer runs3
0 min3060
What we tune
Head pressure
Allow it to float with ambient within manufacturer limits, and set condenser fans to match
Compressor sequencing
Stage machines to run fewer, fuller and longer — add minimum run and off times
Defrost
Move from fixed timers to demand or temperature termination, retimed away from the peak
Evaporator fans
Slow or stage them when the room is at temperature to cut fan power and fan heat
Superheat and charge
Verify with measurement — both under and over-charge cost energy and stress the machine
Typical effect of the work
Stock first, always
Product temperature is the line we never cross — every change has an agreed limit, an alarm and a way back — if a setting does not pay, we revert it and note why
How we change a live plant safely
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01
Review
Read the controls, alarms and current setpoints — agree limits with your engineer
-
02
Change
One change at a time, logged, within product temperature and manufacturer limits
-
03
Verify
Compare against the baseline with weather and load normalised
-
04
Hand over
Settings documented and explained to your maintenance team, with a way back
What you receive
- A documented before-and-after list of every setpoint changed
- Starts per hour and runtime, measured before and after
- Condenser, defrost and fan control tuned and explained
- Your maintenance team briefed on each change
- A verified saving against the agreed baseline
The compressor you do not have to replace
Compressor life is governed by how often it starts, how hot its discharge runs and the pressure ratio it works against — every correction moves at least one of them the right way, which also lowers the risk of losing a chamber of stock
From a meter on the wall to a saving you can defend
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01
Meter
Clamp-on meters on the incomer and the big loads — no shutdown, no rewiring
Output Load profile and a baseline
-
02
Survey
A radiometric thermal camera finds hot connections, cold-line losses and leaking envelope
Output Ranked findings with images
-
03
Tune
Setpoints, sequencing, defrost and fan control corrected one change at a time
Output Lower runtime, fewer starts
-
04
Verify
The same meters run again — savings are measured against the baseline and normalised
Output A saving figure you can defend
Questions we hear first
Do you change our controller programme?
Only setpoints, schedules and parameters agreed with your engineer — we never touch safety circuits, and every parameter is recorded so it can be put back
What about the manufacturer’s warranty?
We stay inside the manufacturer’s published operating envelope — if a change needs their approval, we ask for it first
Is floating head pressure useful in UAE summers?
The gain is largest on cooler nights and across the long shoulder seasons, and smaller in peak summer — we measure it rather than assume it
How soon do we see the effect?
Starts per hour and runtime change straight away — the verified energy figure follows once the reporting period has run
Book a free assessment
Find out what your plant is wasting
One call of about twenty minutes — we work out whether there is enough on the table to justify a site visit, and tell you plainly if there is not
- Free first assessment, no obligation
- NDA before the visit if you want one
- We sell no equipment, so findings are findings