Based on the concept of the highly successful AquaSnap range, the new, more powerful AquaSnap Puron covers the capacity range from 190-760kW.

Available in cooling only or heat pump versions, it combines the efficiency benefits and environmental responsibility of R410A with the popular features of the groundbreaking AquaSnap concept. This fulfils Carrier’s commitment to meet the requirements of system designer, installer and end user, following extensive global market research.

Puron (Carrier’s brand name for R410A), is a safe, stable blend that has, been adopted widely over the past eight years as the refrigerant of choice for smaller systems. R410A is not harmful for the ozone layer and has excellent thermodynamic properties, transferring heat more effectively than any other commonly-used

refrigerant. As an example, the use of R410A in the

heat pump version of the AquaSnap Puron translates into an

excellent COP of 2.8 at full load (nominal conditions).

The Carrier AquaSnap Puron uses rotary scroll compressors

and this is believed to be the first time that they have been used

in conjunction with R410A for equipment of this size. The

enhanced efficiency that is the result of combining R410A

refrigerant with scroll compression enables these units to be

optimised to deliver the required capacities at reduced levels of

power consumption.

To maximise efficiency at the part load conditions that prevail

for most of the year, the latest generation patented Carrier Pro-

Dialog control automatically detects and anticipates load

variations, starting up only those compressors required. Linked to

the electronic expansion valve (EXV) Pro-Dialog improves use of

the evaporator heat exchange surface to further optimise energy

efficiency at part load. The resulting very high seasonal energy

efficiency ratio (SEER) means that at part load conditions (where

most chillers operate for 95% of the time) the AquaSmart Puron

delivers around 4.5kW of cooling for 1kW of electricity

consumed.

This chiller will be particularly attractive to northern European

markets when its integrated direct expansion free cooling option

is applied. A patented, new Carrier design, based on the

thermosyphon principle, avoids the cost pitfalls of other systems

and offers a substantial improvement in overall energy efficiency

by allowing the system to operate with water rather than the

standard glycol solution. Gas migrates naturally from the

evaporator to the condenser, transferring heat, and a small

refrigerant pump keeps this flow circulating.

Heat recovery options (total or partial) can further increase

overall system efficiency by using reclaimed heat to generate

domestic hot water.

All this results in the further environmental benefit

of contributing to a reduction in the global warming

effect caused by CO2 emissions during electricity

production. It also has implications for lifecycle costs,

and will help fulfil the requirements of the Energy

Performance of Buildings Directive.

Throughout Europe, research shows that low

operating noise levels are high on the user priority list

and the design of the new AquaSnap Puron reflects

this. Not only does the use of rotary scroll

compressors increase efficiency, their inherently

smoother operation also contributes to an acoustic

performance that has been benchmarked as offering

the quietest capacity/noise ratio in its class. The

compressor chassis is isolated on flexible antivibration

mountings, featuring a specially designed

(Carrier patented) bracket to connect the piping

support to the compressor base to further limit noise

transmission. Additionally, the European version

features an acoustically treated compressor enclosure.

The transverse V-shape design of the condenser, with

an open angle of 50° allows even circulation over the coil surface

at low velocity for maximum efficiency and minimal noise

generation.

The AquaSnap Puron incorporates the fourth generation of

Carrier’s patented Flying Bird shrouded axial fan. This has an

exceptionally aerodynamic impeller and a high efficiency motor

requiring 35% less energy than a conventional fan.

The unit’s compact footprint makes it ideal for installation in

new buildings or during the refurbishment of existing buildings,

freeing valuable floor area. There is no need for additional plant

room space for the installation of pumps, valves, expansion

vessels and other accessories as all components have been

integrated within the hydronic module, the heart of the AquaSnap

concept. Despite this, the physical size of the AquaSnap Puron

remains unaltered delivering considerable benefits to specifiers,installers and building users.

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