WRE

WRE is the new Galletti series of self-contained reversible heat pumps and water chillers for indoor installation, suitable for both air conditioning and industrial process applications. The range covers capacities from 40 kW up to a maximum of 750 kW and is characterised by extremely high levels of seasonal efficiency (in compliance with ErP 2021 requirements) and reduced space requirements in order to facilitate access to technical compartments (for capacities of up to 560 kW, the width and height are less than 88 cm and 190 cm respectively). In order to increase the efficiency at partial loads, WRE models are provided with tandem or trio solutions (2 or 3 compressors on a single circuit) and equipped with electronic expansion valve as standard. Both single and dual circuit versions are available.

The use of top quality components at the cutting edge of technology in cooling, hydraulic, and electrical systems makes WRE chillers state of the art in terms of efficiency, reliability, and operating limits. In fact, the ability to produce water from -8 °C to 55 °C and use any type of natural source for dissipation is guaranteed: soil, ground water, or outside air. The high configurability of the series, which is in the DNA of Galletti, is guaranteed by 2 different versions, with and without closing panels, and 3 different acoustic configurations:  tandard, low noise, and super low noise, able to ensure a sound power level reduction of up to 12 dB(A).

The range of the configuration available is completed by the possibility of producing hot water up to 60 °C at zero cost through partial heat recovery. Lastly, the advanced microprocessor that regulates the operation of the unit allows: the control of a maximum of 2 pumps on the equipment side and 2 pumps on the source side, on/off or modulating, the possibility of cascade connection of up to 4 units and management of reversibility on both the gas side and the water side.

Available versions

• 27 models
• Cooling only
• Heat pumps
• Standard execution
• Low noise execution
• Super low noise execution
• Version available with or without protective panelling

Main components

• Structure: in galvanized steel sheet painted with polyester powders for outdoor environments. On request, the compressor compartment is completely closed and accessible on 3 sides thanks to easily removable panels to simplify all maintenance and control operations as much as possible.

• Social compressors: in tandem or trio configuration equipped with IDV valve. The IDV intermediate discharge valve technology allows the compressor to avoid losses caused by overcompression and, consequently, the extra work that the motor has to do in part load operation, thus saving energy and improving part load and seasonal efficiency from 3% to 10%.
• Microprocessor electronic control: allows complete management of the unit. The electronic control automatically adjusts the set point according to the outside temperature to reduce consumption and widen the working range. With the advanced microprocessor control it is possible to create LAN networks for the parallel control of 4 units.
• Heat exchangers: only brazed plate exchangers made of AISI 316 austenitic stainless steel are used with connections in AISI 316 characterized by a reduced carbon content to facilitate brazing operations.
• Cooling circuit: can be made in 2 different executions on the same power size, mainly uses R410A scroll compressors, brazed plate heat exchangers. electronic expansion valves.

• High seasonal efficiency values
• Production of hot water up to 55°C
• Electronic expansion valve
• Up to 6 compressors
• 1 or 2 cooling circuits
• Remote connectivity with the most common protocols
• Compact dimensions
• 3 different acoustic configurations (Standard – Low noise – Quite)