Chiller Parts Supplier

Yellow oil drums, ammonia refrigerant cylinders and flammable flushing agent of chiller parts supplier

Chiller Parts Supplier

Chiller Parts Supplier of Compressors

Centrifugal Compressors

As a chiller parts supplier, all kinds of centrifugal compressors are remanufactured in our workshop. With an over head gantry crane and specialist equipment to hand- Maximus Chillers completes the picture.

Screw Compressors

Screw compressors are remanufactured on the bench. With compressed air and bearing tools- our skilled screw compressor technicians are seasoned in high tolerance measurements.

Scroll Compressors

We have a range of off the shelf Copeland compressors for a fast lead time on process chiller repairs.

Chiller Parts Supplier of Condensers

Air Cooled Condensers

When the condenser on an air cooled chiller is in poor condition- our site survey team will attend to measure up for a new bespoke condenser.

Shell and Tube Condensers

This type of condenser is used on water cooled chillers.

Chiller Parts Supplier of Evaporators

Shell and Tube Evaporators

This is the most popular type of evaporator for large chillers. The low temperature refrigerant is on the outside of the tubes in liquid form. The water is pumped through the tubes, releasing heat from the process into the refrigerant. This is latent heat as the liquid refrigerant boils off into a vapour.

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Chiller Parts Supplier

Vibration Eliminators

We have all the sizes of anacondas on the shelf in our stores. This saves on the delivery time to site when your process if off due to the chiller. Maximus Chillers will get you up and running- fast!

Flushing Agent

For when things go wrong… we stock a solvent based flushing agent which is blown through the system with nitrogen.

Refrigerant Economisers

These are another term for a subcooler. If the refrigerant is further subcooled after the condenser- the system will run more efficiently.

Chiller Parts Supplier of Controls

Pressure Transducers

We can make temporary repairs to faulty pressure transducers using our test equipment. This will keep your plant running while the part arrives onsite.

Chiller Parts Supplier of Ammonia and HFC refrigerant

A full selection of refrigerants are available in our stores including: anhydrous ammonia, R407c, R134a and R410a.

Chiller Parts Supplier of Compressor Oil

Low, medium and high viscosity oils in 5ltr cans and 20ltr drums are ready for shipping from our storage area.

Any Chiller- Any Problem- Any Part- Any Refrigerant- Anywhere- The MAXIMUS ADVANTAGE™

To read more about chiller evaporators- click the Tag at the top of the page.

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Read more about the centrifugal vapour compressor at the Institute of Refrigeration | Click Here


Two green screw compressors being maintained in an air cooled chiller

Air Cooled Screw Chiller Maintenance

We recently carried out air cooled screw chiller maintenance at a site we look after in the North West. The plant is described such because it uses two Bitzer screw compressors to create a pressure difference in the R134a refrigerant. The plant has been designed to be remotely operated…

Chiller Remote

This is a way of operating the chiller remotely. Instead of the end user having to walk up to the machine each day to check for faults (chiller local) the plant can be remotely operated and monitored.

Run Signal

The run signal to start the chiller is sent by a relay being energised in the BMS panel (Building Management System) in the plant room. When the chiller receives the run signal, it shows the chiller on message.

Fault Feedback

When the chiller develops a fault, the chiller energises a relay, sending a fault feedback signal to the BMS panel. This fault signal causes the run signal to drop out and a new run signal to be sent to the adjacent redundant system.

BMS Panel

The BMS panel runs contactors which bring the water system pumps on, it also receives analogue signals from temperature sensors on the water system. These inputs and outputs are wired into a PCB which converts them into a data signal. This signal is sent down a CAT 5 plug cable to the supervisor in the facilities management room in the building below.

Remote Monitoring During Air Cooled Screw Chiller Maintenance

A supervisor is a computer which has graphic monitoring of the chillers and the air handlers. The supervisor, is connected down a phone line to the BMS company. Often, the chiller is remotely operated and monitored from a laptop used by a BMS engineer working from home.

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Air Cooled Screw Chiller Maintenance Parts

With a comprehensive range of chiller parts available, off the shelf, for air cooled chillers- look no further than Maximus Chillers for all your chiller parts. We can also supply parts mostly same day. A specialist part on this chiller is the electronic expansion valve driver- this regulates the steps in the expansion valve to ensure correct superheat in the shell and tube evaporator. An electronic expansion valve driver is also available to regulate the expansion valve in the refrigerant economiser. This acts to subcool the refrigerant to ensure optimum system efficiency.

Diagnosis During Air Cooled Screw Chiller Maintenance

Should you need chiller diagnosis- one of our trained professionals onsite during the maintenance will identify the issue with his system test equipment.

To read more about air cooled chiller maintenance click the Tag at the top of the page.

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Read more about remote monitoring and control on Wikipedia | Click Here


Vacuum pump and green compressor during air cooled chiller superheat maintenance

Air Cooled Chiller Superheat Maintenance

Air cooled chiller superheat maintenance at Maximus Chillers. During the visit, we found a high superheat condition with an Italian chiller. The customer had reported a low refrigerant charge trip out. The customer raised the order, so we got straight to work on the leak during the maintenance visit.

Pressure Temperature Relationship

Put simply, the higher the pressure, the higher the temperature of the refrigerant- this is consistent with Charles’s Law of Constant Volume. The refrigerant was found to be at a higher temperature above saturation (or boiling point) than usual- which is a high superheat condition. The chiller runs on R134a, which is a HFC refrigerant.

Air Cooled Chiller Superheat Maintenance with Leak Finding

Our engineer used his leak identification equipment to find the leak. After looking around the chiller he found the leak adjacent to the shell and tube evaporator, where 4 bolts hold the suction pipe on. This coupling is sealed with a gasket.

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Chiller Pump Down

Because of the location of the leak, our engineer decided to pump the chiller down to the condenser and valve the evaporator off. A lot less time consuming than setting up the recovery unit to decant the refrigerant.

Air Cooled Chiller Superheat Maintenance with Leak Repairs

He used his Allen key set to remove the suction pipe from the evaporator. On inspection, the paper gasket had deteriorated then been pushed out by the pressure in the system. All of our engineers carry an extensive range of commonly used parts and materials as standard in their cars. This is to reduce down time for the customer. He made up a new paper gasket, coated it with a special sealing compound, then re fitted the suction pipe to the evaporator. He then used his torque wrench on the Allen key bolts to the correct manufacturer’s recommendations. The system was then pressure tested and dehydrated as per standard industry guidelines.

Screw Compressor

The superheat value at the Bitzer screw compressor was found to be within normal operating values after additional refrigerant was added to the system. A further follow up leak test was carried out at a later date according to F-gas regulations. The paperwork being kept in the F-gas file in the chief engineer’s office.

To read more about air cooled chiller maintenance click the Tag at the top of the page.

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To read more about vapour compression on Wikipedia | Click Here


7 large air cooled chiller condensers maintained with 12 fans each

Air Cooled Chiller Condenser Maintenance

Air cooled chiller condenser maintenance at Maximus Chillers. The condensers in the picture are a row of 6. These are remote from a row of 6 chillers, located in a plant room in the building below. The chillers are 750 kw single screw compressors with a control panel located to the side of each. On this visit, the emphasis of the maintenance was scheduled as being to the condensers.

Fan Speed Controllers

The refrigerant for the systems is R134a, so to allow for the saturation of the refrigerant, 8 bar is the head pressure set point. This pressure corresponds to the desired condenser temperature of 36°. Subcooling of 6° to 8° is achieved during the nominal operation of the plant. Each fan speed controller runs the 12 condenser fans together. Other condenser designs where fans bang on forwards and backwards cause vibrations resulting in reoccurring leaks on the condenser. Chiller No. 2 had tripped during a “discharge override” system message. On inspection of No. 2 condenser- the fans speed inverter had tripped on “over temperature” alarm. The panel fan, which is the kind to cool computers, was found to be still trying to run but seized. This failure had caused the alarm on the inverter. The panel fan was replaced from the stock of parts in the on site stores. The chiller was reset and a detailed Tick Sheet was completed noting the occurrence of this fault on arrival.

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Air Cooled Chiller Condenser Wash Down Maintenance

Because of the large size of the plant, the customer had installed a fireman’s hose for the wash down of the condensers during air cooled chiller maintenance. This is located in the free space beneath the condensers. It is fitted to a portable buggy so it can be moved under each condenser. Setting the nozzle to the correct attitude, our engineer moved the buggy sideways, so as to rinse the condenser in the direction of the fins. The condenser was relatively clean as the on site maintenance engineers carry this task out as part of their scheduled maintenance.

To read more about air cooled chiller maintenance click the Tag at the top of the page.

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Read more about HVAC air coils on Wikipedia | Click Here


Yellow oil drums, ammonia refrigerant cylinders and flammable flushing agent of chiller parts supplier

Chiller Refurbishment Supplier

Maximus Chillers is an established chiller refurbishment supplier. Maximus means the highest and the greatest in Latin, so we pride ourselves in offering the highest and the greatest customer service and technical capability. There is never a job too big for Maximus Chillers- we are seasoned in following a problem through to the logical solution.

Chiller Refurbishment Parts Supplier

Any part is available to our contract customers. We have a worldwide supply chain of the best suppliers. This means any part or refrigerant can be sourced at your convenience. When a part is not available, a different part of the same design specifications is selected and usually delivered same day. By same day we mean: the part is loaded into a van- then and there- and driven to site!

Oil and Refrigerant

We keep a stock of oil, refrigerant and other materials in our stores- see picture. This provides you with 'round the corner' convenience to your factory or facility. Whatever kind of ammonia grade specialist oil you require- we have it on the shelf. With a comprehensive range of other chemicals and solvents- Maximus Chillers completes the picture.

0161 370 7193

service@maximuschillers.com

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Chiller Refurbishment Diagnosis

Our engineers are in their comfort zone while carrying out diagnosis during chiller refurbishment- that is what they do best! Even when a fault involves wiring that disappears into a loom, down the other end of the machine, with no wiring diagram- Maximus Chillers can help. Usually, however, faults are obvious to our engineers or can be found easily.

Technical Support Desk

Our contract customers enjoy the full benefit of our global technical support desk. We offer real time technical support with manuals being sent electronically to site. Where a time difference is involved, we arrange a time convenient to both locations, or answer emails when the office opens in the morning. If we can talk you through over the phone, we can get you up and running with the minimal disruption to your process.

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Visit the ASHRAE for Standards and Guidelines Under Continuous Maintenance


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