Group: Alfa Laval
Catalog excerpts
General information & application Helpman LEX coolers are are commercial heavy duty air coolers for general application in small to medium size cooling and freezing rooms. Helpman LEX coolers are available from stock. Evaporating temp. +5 to -40°C Refrigerants all H(C)FC, brine Capacities (SC2) 1.3 up to 44.8 kW Air volume 1,030 up to 26,000 m3/h. Coil Coil manufactured from Cu ripple fin® tubes ø 1/2” and Alu-fins. Tube pitch 38 x 38 mm square. Available fin spacings 4 and 7 mm. Casing Durable aluminium casing, white epoxy coated RAL 9003. Models up to Helpman LEX 12 are fitted with hinged interchangeable side plates. Bigger models fitted with easy removable side plates for easy access. Sufficient room for fitting the expansion valve inside casing. All models fitted with a splash guard. Fan motors Blow-through fans, diameter ø 254 up to 508 mm. Enclosed design spray-tight fan motors, protection class IP-55. Motors are equipped with a thermal safety device in the windings, connected to separate terminals in the box. Eflo® refrigerant circuiting With the Eflo® liquid distribution system, the refrigerant is evaporating through the coil in parallel flow with the air. Superheating takes place on the air-inlet side (highest tube temperatures!). With Eflo® , the cooling performance improves as a result of : - Even frost formation over the coil. - Prolongued cooling cycle. - Reduced defrost cycle. Certifications All DX cooler models are “Eurovent Certify All” certified. The Alfa Laval quality system is in accordance with ISO 9001. All products are manufactured according to CE and PED rules. Test Design pressure 33 bar. Each heat exchanger is leak tested with dry air and finally supplied with a nitrogen pre-charge. Options • Defrost systems - Electric defrost (E2) - Hot gas coil in driptray (G1) • Fan ring heater (FRH) • Isolating switch (mounted) (ISM) • Water/glycol execution • Special fan motors - 1 or 3 phase motors - 60 Hz motors - Increased external pressure LEX Commercial air cooler - stock range LEX
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