Structure Panels and base frame are made from galvanized steel protected with polyester powder painting to ensure total resistance to atmospheric agents. Hermetic compressor Single phase rotary type (mod. 3.5-09) and 3-phase scroll compressor (mod.12-14), with thermal overload cut-out and crankcase heater mounted on rubber vibration isolators. Centrifugal fan Forward centrifugal fans, equipped with single phase direct drive motors, low noise 6 poles, protection level ip54, three speeds Condenser High efficiency tube in tube heat exchanger, factory insulated with flexible close cell material. Evaporator Coils are consisting of seamless copper tubes mechanically expanded into blue hydrophilic aluminum fins. Desuperheater High efficiency stainless steel brazed plate heat exchanger, factory insulated with flexible close cell material. (optional) Refrigerant circuit Copper tube connection with charge valve, filter, sight Glass, gas-liquid separator, thermostatic expansion valve, Low pressure switch, high pressure switch The heat pump unit is completed also with 4-way valve, Liquid receiver and one way valve. Hydronic circuit Built with air vent valve, water drain connection, and female-threaded hydraulic connectors. Electric panel Compressor protection; control circuit protection; phase sequence relay (only for 3-phase power supplied; Programmable microprocessor controller (modbus included for bms connection)