Chillaire HVAC & Refrigerant Retrofit or New Modern HVAC System Option?

HVAC systems (Refrigeration / Air Conditioning / Heat Pump) replacement is a costly and messy process that can disrupt building operations over an extended period of time. This means it’s crucial to ensure the retrofit produces the maximum benefit. Not only will this enhance the operation of the facility, it will also help to ensure that the retrofit process will not have to be repeated in the near future.

Customers / Users embarking on an HVAC retrofit should keep the following in mind.

Like for Like Plant Swap?

The easiest and quickest way to replace an older HVAC system is to put in a new system that matches the old one. For example, when the building chiller unit or rooftop package air conditioning system reaches the end of its service life, it is common practice to install a new chiller unit or rooftop package unit of the same type and capacity. Conditions today are probably different, perhaps vastly different, than they were when the original chiller was installed. These days there are alternative options such as VRV or VRF heat recovery heat pump multi systems as well.

While that approach is simple and quick, it is often not the best choice. Most HVAC systems and their components have normal service lives of 15 to 25 years if properly maintained. When a system is originally installed, it is sized and designed to meet the needs of the building at that time. Buildings change, and so do the operations that take place within the buildings. There might be more people in the building and more electronic equipment – computers, printers, copiers and the like. Simply replacing ‘like for like’ does not take these changes into consideration. To get the most out of HVAC system retrofits, the new system with new options must be designed to match the current and future needs of the facility.

New Modern Technologies

HVAC technology has achieved tremendous progress in the past 15 years. New DDC control systems provide a better climate while reducing energy costs. High-efficiency or alternative-fuel chillers can reduce the cost of air conditioning. Variable frequency drives can improve the operating efficiency of both chillers and fan systems. Interoperable building automation systems give facility executives the tools they need to better manage operations.

Although these HVAC technologies are relatively new, they are not risky. They have proven themselves in a range of applications. They are widely used today in new construction. Many are considered essential to keep facilities competitive.

An HVAC retrofit is often a good time to take advantage of these newer HVAC technologies. To determine which technologies are appropriate and cost-effective for the application, take a close look at the existing facility and how it is operated.

System Flexibility Options

Buildings today are in a constant state of churn. Interiors are rearranged. Old tenants move out and new ones move in. Infrastructure requirements increase. The result is that customers are constantly changing facilities to meet the needs of occupants or their own internal operations. One thing that doesn’t change easily in many existing buildings is the HVAC system.

This is why flexibility should be a key goal of HVAC system retrofits. HVAC systems should be able to adapt to those changes without requiring costly alterations. Otherwise, customers face a no-win situation: covering the cost of expensive changes to the HVAC system or living with an HVAC system that can’t keep up with changes in the building. Technology also moves on and there are better alternatives to consider.

Partial-load Performance

Chillers are the single largest users of electricity in practically all buildings. Not surprisingly, improving the efficiency of chillers has been a major goal for chiller manufacturers. As a result, today’s chillers are 25 to 50 percent more efficient at full load than those of 15 years ago. When selecting replacement chillers, much emphasis is paid to this full-load efficiency rating, however that’s only part of the picture.

Most chillers operate at full load for less than 10% their total run time. The other 90% of the time chillers are operating below full-load capabilities. As the load on chillers decreases, so does the efficiency of the units.

Because chillers operate under part-load conditions for such a high percentage of their run times, the annual energy cost of the chiller will be determined primarily by its part-load efficiency. Although it might cost more to purchase a unit with better part-load efficiency, this premium will be recovered many times over through energy savings during the life of the chiller.

Service & Maintenance

As HVAC systems age, maintenance requirements increase. Maintenance costs are too often ignored when system retrofits are being evaluated. In fact, as long as a system doesn’t stop working, it might not even be considered as a retrofit candidate. Just because a system is able to limp along doesn’t mean it’s operating efficiently or meeting the requirements of the application.

Look through maintenance records for the building. High maintenance costs and increasing maintenance requirements are an indication that those systems or components might be approaching the end of their service lives.

Customers should set priorities for HVAC retrofits based in part on maintenance requirements.

Another factor to consider is the availability of replacement components. When components for a particular system are no longer available from the manufacturer, or if the manufacturer should go out of business, it is only a matter of time before it will be necessary to replace that system. This has happened frequently with building automation systems. Before the development of interoperable systems, users were at the mercy of the system manufacturer. Many manufacturers failed or decided to get out of the building automation system business. Others upgraded their systems and discontinued support for older generation systems. Once the spare parts inventory was depleted, users had little choice but to retrofit their building automation systems.

Consider also the maintenance requirements of the systems and components that are being installed as part of the retrofit. Can they be maintained by in-house personnel, or will their maintenance have to be performed under contract? What tools and training will be required to properly operate and maintain the new system? What are the projected maintenance costs? Ignoring maintenance requirements for the retrofitted system will only guarantee having to retrofit the system before it would otherwise be necessary.

Looking into the Future

There is a tendency when planning for HVAC retrofits to focus on only a specific component or portion of the HVAC system. Chillers that are becoming unreliable or the air handler that no longer meets the needs of the conditioned space, might be serious problems that demand to be addressed. But before making retrofit decisions, customers should step back and determine if other projects planned for the building will affect HVAC system operation.

For example, upgrading the lighting system or installing more energy-efficient windows will reduce cooling loads. If those projects are planned in the near future, then a planned retrofit program for the building’s chiller should be scheduled after they have been completed. Reduced cooling loads will allow a smaller chiller, reducing both first and operating costs.

Building Occupancy

One of the goals of any HVAC retrofit program is to improve the level of service. While customers might understand the technical problems with the existing HVAC systems, they will not fully comprehend the needs of building occupants unless they get them involved in the retrofit process. After all, occupants are the ones that understand their environments the best. Customers will not know what system will best meet occupant needs – indeed, they might not even have a good understanding of what their HVAC needs are. Occupant input will give the customer a clearer understanding of what the HVAC system will be expected to achieve.

Building occupants are also good sources of information on the performance of existing systems. Frequently, they are aware of problems that go unreported to building staff. That information is often crucial in setting priorities for HVAC system retrofits.

There’s one other good reason to get occupants involved: HVAC system retrofits can be disruptive. They can require temporary relocation of building occupants. Heating or air conditioning service may be disrupted for days or weeks. A schedule of moves and outages will have to be developed. Without the cooperation of occupants, retrofits can turn into scheduling nightmares.

Funding Approval

HVAC retrofits must compete with other departments for funding. Too often, though, the team responsible simply submit funding requests with little or no supporting information. As a result, projects fail to win the funding needed to perform a complete retrofit. Instead, components are patched together just to keep the system running.

To increase the chances of receiving funding, customers must submit their budget requests in a format familiar to financial managers. Energy savings, maintenance savings, return on investment: These are among the terms that will help convince financial managers of the value of the project.

It’s also important to provide the right level of detail. For example, if reliability is an issue, it isn’t enough simply to report that fact; instead, the team responsible must show that it is a problem with key supporting information. How many times has service been interrupted? What was the cost of those interruptions to the maintenance department? What was the cost to building occupants? What level of performance can be expected from the retrofit system?

An HVAC retrofit is a major undertaking for any customer, building occupants or the organisation’s management. It is also an opportunity, because of the cost and disruption involved, the same opportunity might not come along again for decades.

9. Refrigerant Gases

As of January 1st 2015, R22 Refrigerant will be discontinued. Systems using R22 that require invasive servicing or repair must undergo complete refrigerant R22 removal and deep system cleansing before introducing the alternative refrigerant. An increasing number of equipment manufacturers will be offering flammable refrigerants. Are you ready?

How much money does a saving of 30% energy consumption represent to you?

Sanyo Air Conditioning Systems Spares & Technical Support

Panasonic & Sanyo Air Conditioning System Brands

Sanyo air conditioning were taken over by Panasonic air conditioning a few years ago, and have slowly phased out the Sanyo brand and are no longer supplying the Sanyo air conditioning branded range as Sanyo, but instead as Panasonic.

Any new spare parts for existing Sanyo systems come with the Panasonic logo / branding. Existing customer sites with existing Sanyo systems, where we have had to replace the whole indoor or outdoor unit due to faults, as they are sometimes compatible, can lead to having both Sanyo & Panasonic brand names on the same air conditioning split system, which can sometimes cause confusion. We usually install a label on the indoor or outdoor unit to clarify what has happened.

The good news for all customer with existing Sanyo equipment is that getting hold of Sanyo spare parts has not been an issue for Chillaire Limited. We can obtain spares through Panasonic or due to our knowledge of the air conditioning industry through our network of ex Sanyo suppliers. Chillaire Limited has a good relationship with the Panasonic technical department, who have ex-Sanyo staff with good Sanyo equipment knowledge to assist our engineers, even though our engineers have good knowledge on the Sanyo brand.

Chillaire Limited will continue to offer technical support and repair of Sanyo systems, for the foreseeable future. Our engineers have years of experience working on Sanyo split air conditioning and VRF systems. We will also continue to offer support for the Sanyo rooftop units, packaged units, chillers, close control air conditioning systems and their gas fired air conditioning systems.

Panasonic can offer a like for like replacement air conditioning systems for existing Sanyo air conditioning systems that may require upgrading or replacing, which they are able to do with relative ease and quickly. You also have the option to consider alternative brands, which Chillaire Limited can offer, such as Hitachi / Daikin / Fujitsu / Mitsubishi / Samsung / LG matching existing Sanyo air conditioning system capacities, types of equipment and design.

If you have a Sanyo system that you are having problems with and you require assistance, feel free to contact us on 024 7632 0300024 7632 0300 or by email: service@chillaire.co.uk.

National regional numbers are available on our website: www.chillaire.co.uk

You can also call us on our National Freephone Number: 0800 092 98980800 092 9898 FREE

F – Gas in Air Conditioning

Record keeping and maintenance requirements for companies that operate or service equipment containing fluorinated greenhouse gas (F gas).

Many refrigeration, air conditioning & heatpump systems contain Hydrofluoracarbons (HFCs). HFCs are a type of fluorinated greenhouse gas(F gas).

Companies that operate or service and maintain equipment containing F Gas must meet these requirements.

Check if your system contains F gas

Look at the list of F gases regulated by the EU.

To find out if your equipment contains one of these F gases you can:

check your manual or the labels on your equipment
speak to the company that installed your equipment

HFC 404A and HFC 134a are common in refrigeration systems.

HFC 23 and HFC 227ea are common in fire protection systems.

HFC 404A and HFC 410A are common in air conditioning and heat pump systems.

Use trained technicians

Only trained technicians can carry out work on equipment containing F gases, including:

installation
testing for leaks
general maintenance
disposal or decommissioning when you no longer need the product

For refrigeration systems in vehicles, (eg cars, trains and ships) this only applies to:

refrigerated trucks that weigh more than 3.5 tonnes
refrigerated trailers that are designed to be towed by a truck or tractor

Check that anyone working on your equipment is qualified.

Read more about the specific qualifications needed to work on equipment containing F gases.

Label equipment

You must add a label if you add F gas to refrigeration, fire protection or air conditioning equipment when you’re installing it. The label must state:

that the equipment contains an F gas
the industry name for the F gas, or the chemical name if there isn’t an accepted industry name

From 2017 the label must also state the:

mass of F gas in the equipment (in kg)
carbon dioxide (CO₂) equivalent mass of F gas in the equipment (in tonnes)
the global warming potential of the F gas

Find the global warming potential of each F gas on the list of F gases regulated by the EU.

Find out how to use an F gas’ global warming potential to calculate the weight of the F gas in CO₂ equivalent.

‘Hermetically sealed’ equipment

If F gas is ‘hermetically sealed’ within a product, the label must also state that’s the case. F gas is hermetically sealed if both of the following apply:

any part of the product that contains F gas is welded or brazed shut, or permanently sealed in another way
the product has a tested leakage rate of less than 3 grams per year

A system that meets these 2 conditions is considered hermetically sealed, even if it has capped valves or capped service ports to allow access for repairs and maintenance.

Check for leaks

You’re responsible for stopping leaks from your equipment.

Contractors that install, maintain or dispose of equipment share responsibility for trying to stop leaks with the operators of equipment.

You must check all equipment for leaks.

For equipment that contains F gas above certain thresholds, you must check for leaks at specific intervals.

Thresholds at which leaks check intervals are specified

The thresholds at which leak check intervals are specified are expressed in terms of CO₂ equivalent.

They take into account both the quantity of F gas in the equipment and the ‘global warming potential’ of the F gas (how much the F gas contributes to global warming).

This table sets out the:

F gas thresholds, in tonnes CO₂ equivalent, at which leak leak check intervals are specified
maximum allowed interval between leaks checks for equipment that meets each threshold
quantities of commonly used HFCs equal to each threshold

Maximum interval between leak checks	CO₂ (tonnes)		HFC 23 (kg)	HFC 227ea (kg)	HFC 404A (kg)	HFC 410a (kg)	HFC 134a (kg)
1 year		5	0.3	1.6	1.3	2.4	3.5
6 months		50	3.4	15.5	13	24	35
3 months		500	34	155	127	240	350

You can find out global warming potentials of other F gases in the list of F gases regulated by the EU, and use global warming potentials to calculate the CO₂ equivalent of an F gas.

Equipment that didn’t require leak checks under the 2006 regulation may do so now, if it contains an F gas with a high global warming potential, like HFC 404A.

Special cases and exemptions

If you install a system to automatically detect leaks, the maximum interval between leak checks is doubled. For example you only need to leak check a product that contains F gas equivalent to 5 tonnes CO₂ once every 2 years, if you fit a leak detection system.

There’s no maximum interval for leak checks on hermetically sealed refrigeration and air conditioning systems unless they contain F gas equivalent to 10 tonnes CO₂. That’s equal to 2.6 kg of HFC404A or 7 kg of HFC 134a.

The maximum intervals don’t apply until 2017 for equipment that contains less than 3 kg of F gas.

If you find a leak

If a leak is found during a check, you must repair it and repeat the test within a month to check the repair worked.

Install leak detection equipment

You must fit a leak detection system if your equipment contains F gas equivalent to more than 500 tonnes of CO₂.

For gases commonly used in refrigeration, air conditioning or fire protection, this table sets out the mass of gas equivalent to 500 tonnes of CO₂.

F gas	Mass of gas equal to 500 tonnes of CO₂
HFC 23	34
HFC 508	38
HFC 507	125
HFC 404A	127
HFC 434A	154
HFC 422D	183
HFC 438A	221
HFC 410A	239
HFC 407C	282
HFC 134a	350

The leak detection system must alert you, or a service company responsible for your equipment, if a leak is detected.

You must test the leak detection system checked annually to make sure it’s working properly.

A system that didn’t need leak detection equipment under the 2006 regulation may do so now, if it contains an F gas with a high global warming potential, like HFC 404A

F gases that can’t be used to refill equipment from 2020

From 2020 you won’t be able to use some ‘virgin’ (unused) F gases to refill existing refrigeration systems.

The ‘service ban’ will apply when both these conditions are met:

the refrigeration system contains F gas equivalent to 40 tonnes of CO₂ or more
the virgin F gas has a global warming potential of more than 2,500

The service ban won’t apply to fire protection systems or air conditioning and heat pump systems.

Options when the ban applies

If you need to add refrigerant to systems affected by the ban after 2020 you’ll need to do one of the following:

use an F gas with a global warming potential of more than 2,500 that has been reclaimed (up to 2030 only)
use an F gas with a global warming potential of more than 2,500 that has been recycled either from your own equipment, or by the company servicing your equipment
remove all of the F gas from the system and replace it with an F gas that has a global warming potential lower than 2,500, eg HFC 407A of HFC 407F (this is known as ‘retrofilling’)
replace the refrigeration system with new equipment that uses a refrigerant with a lower global warming potential

Less of your equipment will be affected by the ban if you buy equipment that uses refrigerants with low global warming potentials.

Keep records

The operator of equipment, and the company that services it, must keep the following records about any equipment that has to be checked for leaks (ie any equipment that contains F gas equivalent to more than 5 tonnes of CO₂):

quantity and type of gas in the equipment when it’s installed
quantity and type of gas added during any maintenance (eg leak repairs)
details (name, address and certificate number if relevant) of any companies that install, service or decommission the equipment
dates and results of all mandatory leak checks
measures taken to recover and dispose of gases when you dispose of the equipment (eg disposing of it through a registered waste carrier)

You must also record if the gas used in the equipment has been recycled or reclaimed and if so the:

details of the recycling or reclamation facility (name, address and certificate number if it has one)
quantity of any gases recovered

You must keep records for 5 years & make them available to any authority if requested.

The following requirements weren’t in the previous regulation:

recording measures taken to recover and dispose of gases
recording if the gas is recycled or reclaimed & the facility that recycled or reclaimed it

Recover F gases when disposing of equipment

You must use a qualified technician to recover F gas when disposing of equipment. Find out how to recover F gas.

Ban on new equipment

The EU is banning the use of some F gases in refrigeration, fire protection, and air conditioning and heat pump systems.

Find out more about bans on equipment containing F gases.

HFC phase down

The EU is cutting the availability of HFCs by 79% between 2015 and 2030.

Only companies with EU quotas will be able to supply HFCs to the EU market.

Equipment containing HFCs, particularly those with high global warming potentials, is likely to become more expensive to buy and maintain.

The HFCs that are part of the phase down are listed with their global warming potentials in section 1 of the list of F gases regulated by the EU.

The GEA Denco GAC and GAH range are now available with inverter compressors.

It is precisely in partial-load ranges of operation that the new GEA chillers / heat pumps with DC inverter scroll compressors are extremely energy efficient. They achieve an ESEER value of 4.8.

On the occasion of ISH 2013 (in Frankfurt am Main, Germany, from March 12 to 16, 2013, in Hall 11.0, Stand B91), GEA will present further-developed systems in the GEA GAC and GAH range. These air-cooled GAC chillers and GAH heat pumps are now equipped with inverter compressors. As improvement over their predecessor ranges, these new developments – thanks to their one or two integrated DC inverter scroll compressors – are highly energy-efficient, especially in their relevant partial-load operational ranges. In their rating classes, they achieve exceptional ESEER values, up to 4.8, and thereby reduce operational costs, amortization times, and CO2 emissions. Additional benefits of this new inverter compressor technology include more exact temperature control, continuously variable regulation of compressor speed, and – as a result – longer service life. By virtue of the inverters, the soft-start function is already integrated and does not require selection as an option. Thanks to their inverters, both system variants – the GAC chillers and the GAH heat pumps – require no or only small buffer tanks. In heat pump operations, air-intake temperatures down to -15 °C are possible.

Since the hydraulic connection of these new inverter-controlled systems is the same as that in the predecessor range, design of the water cycle can take place as usual. These new compact units are available as chillers and heat pumps, each in seven capacity ratings from 16 to 75 kW of cooling/heating duty, with or without an integrated pump. In their standard models, they can be installed either outdoors or indoors via duct connection.

New Energy Efficiency Ratings

Nominal versus seasonal efficiency

Previously up until 2013, the air conditioning industry used a ‘nominal’ ratio for cooling “Energy Efficiency Ratio” (EER) and heating “Coefficient of Performance” (COP), however this resulted in a significant gap between predicted performance and what is actually achieved by the air conditioning / heat pump systems.

Nominal efficiency gives an indication of how efficient an air conditioner is when operating at full load in nominal conditions (not often achieved).

To rectify this, a more accurate method – the “Seasonal Efficiency’ Ratio” (SEER) – has now been developed, which provide a better measure of the real-life energy efficiency of air conditioning / heat pump systems.

Seasonal efficiency gives an indication of how efficient an air conditioner is when operating over an entire cooling or heating season (giving a more realistic efficiency measure).

Seasonal Energy Efficiency Ratio (SEER) & Seasonal Coefficient of Performance (SCOP)

The new seasonal energy efficiency ratio (SEER) & seasonal coefficient of performance (SCOP) take into account a number of factors, which together provide a much more realistic view of energy efficiency in real life conditions, including:

Energy performance in different climate zones
Efficiency at partial load capacity as well as full load
Energy consumption in auxiliary and stand by modes
Different load requirements through the seasons

Chillaire Limited offer a wide range of energy efficiency systems manufactured by leading brand names such as Daikin, Mitsubishi, Hitachi, Panasonic and many more. We select the right brand & model for the right application, giving the customer maximum capacity with maximum energy savings.

Sharp Air Conditioners

Chillaire Limited were one of the few companies offering Sharp air conditioners, that were one of the few air conditioning, heat pump inverter systems available back in the 1980’s to the late 1990’s. These Sharp systems were ideally suited for the domestic / residential air conditioning market. The Sharp inverter heat pump technology was ideal for conservatories, bedrooms & the lounge area.

The Sharp indoor units were sleek and small in size, one of the few in those days.

Recently it has been reported that Daikin may be a potential buyer of the Sharp air conditioning business in unconfirmed news reports emanating from Japan.

While having a presence in Europe – mainly in central and Eastern Europe – Sharp only ever flirted with the UK market. Chillaire Limited acquired these systems through one of the Sharp appointed national distributors Climate Equipment based in Solihull.

Sharp apart from specialising in residential air conditioning systems, also distributed a wide range of commercial type of portable units, split type systems and multi split type systems.

Chillaire have been a long standing distributor of Daikin equipment, going back to the early 1990’s, first starting to supply and install through Cooling Services (now part of Daikin UK Limited) and becoming a D1 partner soon after, having won dealer of the Midlands region in 1998, 1999 & 2003.

CMM Rooms, Clean Rooms & Laboratory Close Control Applications

Chillaire Limited continue to provide specialist close control systems for their clients, carrying out initial consultations to assess the requirement and then designing the right type of system.

Chillaire have designed and installed close control systems for Rolls Royce CMM rooms, which even today are still achieving conditions within very tight tolerances, on some sites to within plus or minus 0.3 Degrees Celsius temperature control and plus or minus 5% relative humidity (RH %) control.

Chillaire have been and continue to use the Eaton Williams brand of Colman Moducel air handling units, complete with chilled water coils and thyristor controlled electric heater banks. The chilled water is provided by installing Airedale chiller units, which provide the chilled water at variable stage capacity.

The installation of the Eaton Williams Colman Moducel air handling units, have been varying, from sitting internally on top of the CMM rooms to being located externally, in which case they have been specially modified at the factory and weatherproofed.

Chillaire have been installing dedicated control panels with Trend controls switchgear and a specially designed software package to control the whole system.

All work is installed to a BS standard, pipe work, electrical and duct work. All duct work is insulated with rockwool aluminium foil duct wrap held together with aluminium mesh. All chilled water ,steel pipe work is insulated with Koolspan aluminium rockwool insulation and a rubber layer is glued on around the pipe work to provide a final finish and protection.

Trace heating and pressurisation units are installed to stop the system freezing and developing air pockets.

All external ductwork & chilled water pipe work is finished off with Aluminium Stutco finish, pop riveted together.

Chillaire at the end of each installation carry out a temperature and relative humidity (RH %) mapping survey to ensure that the plant is performing as it should be over a 48 hour period and the results are then presented to the end client.

Chillaire have now been invited to get now be involved with these type of projects outside the UK, due to international customers having visited some of the sites in the UK to view these completed projects and being impressed with the design, installation and final results. Some of these projects may take place in Norway, Romania and France.

Chillaire Limited & GEA Denco for Chillers & Close Control Systems.

Traditionally Chillaire have been favouring the like of Airedale & Trane for Close Systems and Chillers, the main reason being Price, Quality was never really an issue. Recently Chillaire have put forward proposal for an indoor ducted air cooled Chiller unit by a past sales representative who has now moved to GEA Denco. GEA Happel air-cooled chillers for indoor installation

Chillaire have found GEA Denco to be very competitive for these products and have been putting forward these chillers to some their customers. One of the main features was the low noise levels dB(A)

Chillaire Installation Project with a GEA Denco Chiller with Duct Connection

The site of installation can move indoors, but the characteristics remain the same, since air-cooled GEA Happel chillers are also highly effective for indoor operation.

Fully hermetic scroll compressors provide the key components of these models. Depending on the system series selected, high-quality plate heat exchangers as evaporators, and finned tube heat exchangers as condensers, with the series with duct connection, round the systems off to provide an overall cost-effective solution.

The optimal model can be provided for each and any requirements: with the series GEA GSDC, GDC, and GLDC with duct connection, and with radial fans (in the performance range of 4.9-312 kW), and as split model with external condenser in the series GEA GRC and GLRC (in the performance range of 12-162 kW).

Optimized equipment configuration reduces operational costs

Energy-efficient HVAC climate control of computer centres, with GEA Ultra-Denco close control systems

The new GEA Ultra-Denco Close Control HVAC systems by GEA Air Treatment ensure exact temperatures and humidity in climate control. They were especially designed for employment in computer centres. This equipment range includes three sizes with a maximum cooling duty of 50 to 150 kW. New configuration and optimization of components – heat exchangers, filters, valves, and especially fans – have enabled GEA experts to minimize air- and water-side pressure drops and consequently to reduce power consumption by more than 50 %. Further savings potential is offered by the combination of systems with chillers that offer free-cooling functions: for example, GEA GLFC.

The Close Control HVAC units in the GEA Ultra-Denco Range are available, as standard, with 6-row high-capacity cooling banks and with modulating 3-point servovalves in 2- or 3-way versions – and with EC free-running (plug) fans. As a result of their efficiency of more than 90 %, EC fans – especially in partial-load mode as, for example, with standby redundant features – enable reduction of power consumption by up to 45 % in comparison to systems with AC fans in full-load mode. Location of the fans in a raised floor radically reduces flow reversal losses and thereby reduces power consumption of the overall unit by more than 50 %.

Enlarged filter surfaces – with the resulting reduction in pressure drop – lead to longer maintenance intervals. The large heavy-duty heat exchanger with 6-tube rows is designed for greater output: or for operation with more energy-efficient media temperature while enabling the same output. By optimization of the components through which water flows – such as heat exchangers, valves, and piping – GEA Denco has succeeded in extremely reducing water-side pressure drop.

Since the fans in this configuration pull in air only through the unit itself, the enclosure is not under pressure and is characterized by great air tightness. This prevents leaks. Service staff have simple access from the front to maintain the system.

The APC system provides constant pressure in the raised floor, up to the performance limit of the installed equipment.

Monitoring the pressure – and maintaining perfect climate control
When used in high-capacity server environments, a control-system combination with an automatic pressure-controlled system (APC) provides exact monitoring and optimization of the pressure prevailing in the raised floor. This configuration always supplies the correct amount of air that is momentarily required. Pressure-dependent control allows further reduction of power consumption by the fans. These solutions also minimize the risk of so-called hot spots: i.e., areas in which high temperatures can develop in small areas. This GEA system operates particularly effectively in combination with cold- and hot-aisle containment.

Free cooling opens up further potentials for saving
With cooling requirements over the entire year, one highly recommended solution is the combination of GEA Ultra-Denco Close Control HVAC units and chillers with free-cooling functions. As soon as these free-cooling systems can provide the water (or water-glycol mixture) 1 K below the required return-flow temperature, mixed operation is possible. At low air temperatures, it is often possible to switch off the compressor entirely: for example, during winter operation. This reduces compressor operation time and lowers power costs.

In Addition:

GEA Denco supply various other forms of air conditioning systems, such as DX cooling with Gas Fired Heating, Heat Pump Technology, Heat Recovery Systems, Heat Pump, Water Cooled Chillers, Air Cooled Chillers Indoor & Outdoor Types.

Service Maintenance Contracts

Chillaire are keen to expand their service maintenance customer base and are offering very competitive rates, we understand the current economic times are difficult, customers are cutting back on maintenance, this is not always the best option, lack of maintenance can lead to higher cost later, when the plant begins to fail due to lack of care and attention.

Give Chillaire the opportunity to quote for your service maintenance contract requirements when your current contract expires.

We have trained and certified air conditioning and heating engineers.

Total Air Conditioning ● Heating ● Ventilation Solutions for all applications

Chillaire are based in the heart of England with various offices in surrounding areas, from where we provide a national service through our locally and remotely located engineers.
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CONTACT US

Freephone 024 7632 0300

Head Office
Patani House
16 Lythalls Lane
Coventry
West Midlands
CV6 6FG

service@chillaire.co.uk
sales@chillaire.co.uk

Monday	9:00 am – 5:00 pm
Tuesday	9:00 am – 5:00 pm
Wednesday	9:00 am – 5:00 pm
Thursday	9:00 am – 5:00 pm
Friday	9:00 am – 5:00 pm
Saturday	Closed
Sunday	Closed

Chillaire
Air Conditioning - Heating - Ventilation