Unit description Outdoor reversible unit for the production of chilled/hot water with hermetic rotary Scroll compressors, ozone-friendly refrigerant R410A, axial-flow fans, copper tubes aluminum fins air coils, braze-welded plate-type exchanger and thermostatic expansion valve. External panels in pre-clad sheet steel and base in galvanised steel with paint finish. The range is composed by units equipped with four compressors in tandem configuration on two independent refrigerant circuits. Version K - Standard efficiency, compact version LN-K - Key efficiency, compact and low-noise version SL-K - Key efficiency, compact and super low-noise version Configurations - - basic function D - partial condensing heat recovery function Features REFRIGERANT GAS R410A The use of R410A allowed to achive better energy efficiencies with environment full respect (ODP = 0) INTEGRATED HYDRONIC MODULE The optional built-in hydronic module already contains the main water circuit components; it is available with single or twin in-line, for achieving both low or high head.