Hoshizaki FM-150KE(-N) Service Manual page 59

Be careful not to scratch the surface of the O-ring, or it may cause water leaks. Handle
the mechanical seal with care not to scratch nor to contaminate its contact surface.
25) When replacing the evaporator;
(a) Braze the new evaporator with nitrogen gas flowing at the pressure of 0.2 - 0.3 bar.
(b) Replace the drier.
(c) Check for leaks using nitrogen gas (10 bar) and soap bubbles.
(d) Evacuate the system, and charge it with refrigerant. See the nameplate for the
required refrigerant charge (See "1. [c] EVACUATION AND RECHARGE").
26) Refit the panels in their correct position.
27) Connect the power source.
WARNING
56