Maximus Chillers is a chiller upgrade company that can extend the life of large water cooled chillers for up to 10 years. The construction of new chillers has a high carbon footprint. Large fixed plant can run for 30 years or more. With chiller upgrades and regular maintenance, we can optimise the efficiency of your chilling plant. No part is obsolete: it can be replaced with a new part. See below for the kind of works we carry out...
Chiller PLC Refurbishment
Blown chiller PLC's can be easily refurbished by Maximus chillers. At Head Office, we have an electronics laboratory where our dedicated controls engineer strips down and inspects your PLC. A programmable logic controller will often fail for basic reasons, such as, a component going to earth. Usually this occurs outside the controller or relay board. The volt leakage draws down the 5 vdc control voltage to earth, causing over heating then overload of PCB components. Higher voltage earth drawdown such as 24v, 110v and 240v also occurs because the PLC is used to switch various relays and contactors around the chiller
Don't Blow the Refurbished PLC!
Before we fit the refurbished PLC let's have a look at why it failed in the first place. Most commonly rain water has got into a component such as the plug that screws onto a solenoid. The fault can be traced by assessing how the PLC or relay board failed, then fault finding the chiller using a multi-meter. It would be rather embarrassing to fit a refurbished controller and then blow it again after switching the chilled water system on!
Larger Chiller Controllers
A larger chiller will have a controller that cannot fail due to problems around the chiller. This is because it is separated by relays and contactors. Should anything go to earth, the PLC is protected by this step in between. The components that do go directly into the controller: the slide valve sensor for example, have a milliamp fuse for protection
Failures From Within the Controller
Although the most common reason to refurbish a chiller controller is earth leakage, the controls and electronics can slowdown or fail completely from within the controller. Dust can cause 'tracking' across a printed circuit board causing internal failure of components. Also, issues to the line voltage can cause the wrong volts to come out of the other side of a transformer- corrupting the program, causing 'ghost lights' and program malfunctions. All of this is checked prior to the controller refurbishment to ensure the job goes as it should. 12 month guarantee on all our refurbished chiller controllers
We at Maximus Chillers offer chiller upgrade, refurbishment and rebuild
Fit New Controller
Chiller rebuild is necessary when the controller is finicky and prone to nuisance trip outs. Each time it trips out spuriously it costs you the price of a call out to reset it. Parts and service are expensive. Over time we can remove the spurious trips through service adjustments and repairs. Better still- rebuild your chiller by fitting a new controller...
Controller Swap Out
Chiller rebuild by fitting a new controller is easy and cheap. All of your design requirements can be easily programmed into the new controller. We fit state of the art controls. The old controller is disconnected and removed
For HFC, the transducers and sensors are replaced
For ammonia, the sensors can be re-used as the program can be set to look at the various types
The new controller is fitted and wired in. Now the chiller is rebuilt- it is run tested and goes into seamless operation. An effective chiller repair with no more spurious trip outs
Chiller refurbishment is recommended because the evaporator, condenser and compressor are fixed plant and are the main part of the cost of your chiller. Large fixed plant has another 10 years of life in it. The price and carbon footprint to construct new fixed plant is significant. Therefore, the most cost effective and environmentally friendly option is chiller refurbishment. The existing chiller efficiency can be improved to the same efficiency of a new chiller by fitting variable speed drives. As and when the compressor fails: we have the capability to strip and rebuild it in our workshop or on site. All of our refurbished compressors come with a 12 month guarantee. Our customers trust in our service- you can read what our customers think in Testimonials
Why choose Us for Chiller Upgrade, Refurbishment and Rebuild?
With our in house controls and chiller upgrade, refurbishment and rebuild team- we get the job done fast! This minimises down time for the minimum disruption to your process
What We Offer for Chiller Upgrade, Refurbishment and Rebuild
The complete chiller upgrade, refurbishment and rebuild service, including corrosion and weatherproof paint. National and overseas coverage
Any chiller- any part- any problem- any refrigerant- Maximus Chillers
Read more about good practice in retrofitting to a new refrigerant
Case Study of Chiller Upgrade, Refurbishment and Rebuild
On a site we look after in the South West, it was the first chiller upgrade, refurbishment and rebuild for our engineer. He was changing the controller on a water cooled chiller. As this was his first time- it took a lot of guts! His first task was to rip the wires out of the panel! Not the 3 phase or the common neutral- but everything else. Now the chiller will never work again unless the controller is fitted correctly. After the wiring, the pins on the back of the controller need to be programmed for the machine. Needless to say: the chiller upgrade worked. The customer says better than before- well it should do- it is a Maximus Chiller now!
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