Air cooled chiller with free-cooling
332 - 1450 kW
Outdoor unit for the production of chilled water, equipped with semi-hermetic screw compressors, R134a refrigerant, axial-fans, condensing coil with copper tubes and aluminum fins, shell and tube evaporator single pass and electronic expansion valve. Base, supporting structure and panels are of galvanized epoxy powder coated steel. The unit is supplied with anti-freeze oil and refrigerant and has been factory tested. On-site installation therefore just involves making connections to the mains power and water supplies.
In free cooling mode, the liquid is cooled by outdoor air, thus lowering the load of the compressors until it is reduced to zero; this occurs already at positive outdoor temperature (T+ versions and SL-T+).
The NG configuration complies with applications where it is not allowed or desired the use of ethylene glycol.
Energy saving guaranteed by free-cooling, which exploits the low external air temperatures; free-cooling control with optional modulating valve.
POSITIVE TEMPERATURE OF TOTAL FREE-COOLING
Big heat exchangers surfaces: 100% free-cooling cooling load satisfied at positive environment temperature
WIDE RANGE
Extended capacity range.
UNIQUE PROPOSAL - PATENT PENDING
Booster function to increase chiller efficiency
INTEGRATED HYDRONIC GROUP
The built-in hydronic group (optional) includes the main water circuit components. The 2 pumps are in twin configuration and available with 2 or 4-pole motor, fixed or variable speed, high or low head, to satisfy various installation requirements.
Technical data
Technical data
Produkt-Informationen
Produkt-Informationen
T+ - Version with positive free-cooling temperature 100%
SL-T+ - Super low noise version with positive free-cooling temperature 100%
- - Basic function
NG - Function for free-cooling without the use of glycole
EC fans with DC brushless motor
Modulating valve for water temperature control in Free-Cooling mode
Hydronic group
VPF (Variable Primary Flow) kit: variable flow pumps with on board regulation
Fast restart
Double power supply with automatic changeover (ATS) or motorized changeover
Compressor power factor correction
Set-up for remote connectivity with ModBus/Echelon protocol cards
Touch Screen visual display
Remote control keyboard (distance 200m and 500m)
Noise reducer (only for non-silenced versions)
Electronic control W3000 TE
The W3000TE controller offers advanced functions and algorithms. The large format keyboard provides a complete overview of the unit's status. The controls and the complete LCD display favor an easy and safe access to the unit's setup. These resources provide assessment and intervention of the unit, by means of a multi-level menu, with multiple languages available. The LED icons immediately show the circuit's operating status, as well as the fans and the water pumps (if present). The touch screen interface: 7.0” WVGA color display with adjustable LED back-light and front USB port is available as an option. The touch screen technology allows intuitive navigation between the various screens, safe access to the data with a three-level password protection as well as the graphic display of the performance of some monitored measurements.
The diagnostics are comprised of a complete alarm management system, with “black box” (via PC) and alarm log functions (via display or also PC) for a better analysis of the unit's performance.
For the systems made up of several units, the adjustment of the resources is performed by optional proprietary devices.
Consumption metering and performance measurement are possible as well. Supervision can be easily developed via proprietary devices or the integration in third party systems by means of the most common protocols as ModBus, Bacnet-over-IP, Echelon LonWorks, Bacnet MS/TP protocols.
Compatibility with the remote keyboard to manage up to 8 units.
The presence of the programmable timer allows for the creation of an operating profile containing up to 4 typical days and 10 time bands.
The control is characterized by the continuous modulation of the unit capacity, based on PID algorithms and referring to the water delivery temperature.
Optionally (VPF package), capacity modulation can be integrated with hydraulic flow modulation, thanks to inverter-driven pumps and to specific resources for the hydraulic circuit.