Removal And Replacement Of Evaporator; Removal And Replacement Of Air-Cooled Condenser - Hoshizaki KM-255BAH Service Manual

G. Removal and Replacement of Evaporator
Always install a new drier every time the sealed refrigeration system is opened.
Do not replace the drier until after all other repairs or replacement have been
made.
) Unplug the unit from the electrical outlet.
) Close the water supply line shut-off valve.
3) Remove the panels.
4) Recover the refrigerant and store it in an approved container.
5) Disconnect all affected water hoses and remove the spray tube.
6) Remove the screws securing the mounting brackets, lift the evaporator up slightly and
disconnect the evaporator inlet tubing.
7) Lift up the evaporator, and disconnect the evaporator outlet tubing. Remove the
evaporator.
8) Remove the drier (located behind the upper, rear panel), then place the new drier in
position.
9) Install the new evaporator. Braze all fittings, including drier, while purging with nitrogen
gas flowing at a pressure of 3 to 4 PSIG.
0) Check for leaks using nitrogen gas (40 PSIG) and soap bubbles.
) Evacuate the system, and charge it with refrigerant. See the nameplate for the required
refrigerant charge.
) Replace the removed parts in the reverse order of which they were removed.
3) Open the water supply line shut-off valve.
4) Plug the unit back in.
5) Check for leaks.
6) Replace the panels in their correct positions.
H. Removal and Replacement of Air-Cooled Condenser
) Unplug the unit from the electrical outlet.
) Remove the panels.
3) Recover the refrigerant and store it in an approved container.
4) Remove the screws securing the electrical box (located over the compressor), then
slide out the box.
5) Remove the screws securing the compressor base and the condenser. Carefully slide
the refrigeration assembly forward.
6) Disconnect the condenser inlet and outlet piping.
7) Remove the fan motor and shroud assembly from the old condenser and attach it to the
new condenser.
IMPORTANT
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