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23 <br />PREVENTIVE MAINTENANCE [TO BE PERFORMED BY TRAINED SERVICE PROVIDER] - Page 2 of 2 <br />WARNING! TURN OFF CASE BEFORE PERFORMING PREVENTIVE MAINTENANCE! <br />PREVENTIVE <br />MAINTENANCE <br />FREQ. INSTRUCTIONS <br />Case Exterior Qtly Under Case Cleaning: When refrigeration package is removed from under case, <br />vacuum (or broom) under case to remove all dust, debris and dirt that collects. <br /> Qtly Refrigeration Assembly: Turn main power switch OFF before cleaning! <br />Remove front panel and lower front grille (by simply lifting up and off). <br />Slide out refrigeration assembly. Note: Initially, it may be necessary to remove <br />(2) compressor pan shipment screws for refrigeration assembly to slide out. <br />Remove the wicking material from pan. See below for illustration. <br />Use a clean cloth and hot water with soap solution to wipe down all the dust <br />and residue that forms on parts. <br />Caution! DO NOT get fan motors wet while cleaning! <br />Hot gas coils and pans (including overflow pan): Use clean cloth and warm <br />water with CLR® (to prevent calcium, lime and rust from forming). <br />After hot gas coils and pans are thoroughly cleaned, rinse thoroughly with a <br />spray bottle filled with clean water and a sponge to absorb remaining residue. <br />DO NOT leave residue in hot gas pan or overflow pan before starting back up! <br />Place new wicking material on prongs. To order wicking material, call <br />Structural Concepts Technical Service [see last page of this manual]. <br />Slide refrigeration unit assembly back under case. <br />Replace front grille to case (no screws required).