... ISO9001:2000 NAKB20 Specifications Main Function:Temperature display, Refrigeration ,Defrost Control; Crankshaft heating;Compressor running current display, overload, phase-deficient, ... Can provide up to 9999 hours trial time;Optional installation of the cooling water pump, networking and printing capabilities;The ... ,15Ph)Pictures: Body Size(mm): 350×450×180 electric control box of BITZER unit NAKB20