FREE COOLING UNITS

The HTE FREE COOLING ventilated units are particularly suitable for installations that require the production of chilled water in continuous service within the 12 calendar months, even when the outside temperature is very stiff. The free-cooling function allows it to get a free cooling water usage during the winter season, while in the intermediate seasons actively participates in the reduction of the intervention of the chiller, that would otherwise need to run continuously. Targeted at OEMs and the B2B market to reduce the lead-time of construction of the water chiller.

The reduction of energy consumption is found as early as at 15 ° C external air temperature. The free cooling can be supplied combined with the condensing section, coupled to the water circuit, with different geometry and pipe sections to minimize air and fluid side pressure losses. Self-draining systems are available to speed up the loading and unloading process of water completely automatically, to preserve the exchangers during periods of inactivity, or when the temperature of the circuit is at risk of ice.

The construction is in lengths up to 13 meters, limit of the transportability by truck, to meet the widest needs of power, in particular with super silent execution. The careful design of the free cooling is given to maximize the heat transfer surfaces and reduce energy consumption and noise levels, as well as increase the compressors lifetime,  providing optimal oil returns with a consequent increase in efficiency.

The HTE free cooling units are particularly suitable for special industrial buildings  combined with logic control and regulation.

ADVANTAGES OF FREE-COOLING:

• Reduction of working hours of the compressors (free-cooling in summer and winter free-cooling) 
• Maximum energy efficiency and cooling. 
• Annual energy consumption lower (even higher than 50%) compared to only version chiller 
• Large heat exchange surface 
• Maximal noise reduction 
• Fans with electronic control according to EC Directives, conform to the ERP 2015 (optional) 
• Wide operating limits even at extremely low temperatures 
• Compact design 
• Standards complied depending on the country of destination of the units according to the customer's needs

Features

Data sheet

Fittings

Generality

Configurations	XXX models in catalogue for the XXX serie; Customized solutions; Special materials available; Surface protection treatments; Switchboards and control logics
Coils	Coppers pipes with 10mm, 12mm and 16mm diameter; Aluminium fins with stackered tube geometrie or alligned with diameters between 1,6 mm to 6 mm; In standard configuration getween 2 and 6 rows; Floating side support to allow a better thermal expansion
Structure and cover panels	Standard execution with aluminium cover panels; Fan panels made out of a signle metal sheet; Stainless steel brackets; Stainless steel screws and bolts for every removable element; Self-supporting frame (standard for Jumbo and Magnum, for Table units over 6000 mm coil length)
Ventilation	Fan diameter between 500 and 1.000 mm; 5 power levels for each diameter in standard configuration; AC 400V 3̴~ (3-phase) or 200V 1~ (single phase) motors, both for 50Hz; Upon request 60 Hz, EC-brushless or ATEX versions.

Materials

	Fins	Tubes	Manifolds	Metal sheets
Al - Aluminium
Al-P Prepainted aluminium
Al-H Hydrofillic aluminium
Cu - Copper
Ot - Brass
Hot bath zinc steel
Stainless steel
Legenda	Standard Optional Not available

Treatments

Protecting surface treatment of the exchanger element	Blygold® Electrolitic zinc coating Cataforesis Fin Guard Silver® Epoxy coating
Cover panels	Special paints according to RAL specifications

Fans

All H.T.E. units are equipped with high efficiency multiple wing fans according to the eco-compatible directive UE nr. 327/2011. The electric motors are thermally protected with IP54 protection class, IP55 according to IEC/EN 60529/ DIN 40050. The axial fans with external rotor are of the service-free type, with hermetic bearings according to DIN 6252 with lifetime lubrication, statically and dynamically trimmed according to ISO 1940/1. The windings have different isoltation class, varying between the standarf F class, up to H class for particularly demanding applications. The functionning limits are between -30°C and +60°C for the standard motor configuration. Other motors are available upon request. The three-phase motors are ready for the double connection (star, delta or with switching device). All fans motors are designed to be connected to a tension or a frequency regulation device, to control rotation speed and noise level. There are 5 different performance sizes at disposal, ensuring excellent performances through the combination of installed power, noise level and respect of the declared consumption.
Optional	• Cabled fans ready for the connection on a contact board according to EN 60204-1 rule; • 60Hz versions; • Special voltages; • According to ATEX-regulations; • In pushing or reversible version; • With EC-bruschless electronic modulating motors; • Centrifugal fans; • Regulation systems; • HTE Process Control Manager;
According to the type of ventilator the motor data may vary. Please remark that the energy consumption will vary in function of the air temperature and the load conditions. We reserve ourselves the right to use fans made by different manufacturers. For the corresponding specific electrical data refer yourself to the type of unit or fan model.

Accessories

Hydraulics	• Special hydraulic components (valves, fittings, flanges, rotalock or victaulic connections, compensators, temperature or pressure indicators ....) • Customized hydraulic or refrigerant connections an particular solutions • Multiple circuit executions; • Adiabatic misting system (connected to hydrofillic fins); •PED system with adiabatic panels; • UV sterilizing lamp; • Pump stations with stainless steel rotor and cochlea´s single- or multiple pumps;
Electrics, control and regulation	• Run switches; • Cabling in terminal box (EN 60204-1); • Cabling in switchbox (EN 60204-1); • Motor protection device with thrmal contact; • Triac fan speed regulator; • Frequency control and sinus-filters; • HTE Process Control Manager;
Structural components	• Antivibrtion dampeners; • Customized lifting brackets; •Self-supporting frames in pikled welded stainless steel; • Container installations; • Custom-made skids;

Reference guidelines

97/23/CE PED 2006/42/CE MD 2002/95/CE RoHS Direttiva 2004/108/EC EMC Direttiva 2006/95/CE LVD Direttiva 2009/125/CE Erp EN ISO 13857:2008 EN 60204-1 EN 1048:2000

• DRY. Low sound emission AC or EC fans and unit standard construction (on request wired connection box with terminal plate or wired switchboard)
• ECO. Low sound emission AC or EC fans with fan speed controls (wired in switchboard)
• WET. Low sound emission AC or EC fans with fan speed controls and adiabatic water spray system (wired in switchboard)