Hoshizaki 73180 service manual Removal and Replacement of Evaporator

Page 44

4. Removal and Replacement of Evaporator

NOTICE

•Always install a new drier every time the sealed refrigeration system is opened. Do not replace the drier until after all other repair or replacement has been made.

•When brazing, protect the drier by using a wet cloth to prevent the drier from overheating. Do not allow the drier to exceed 250°F (121°C).

1)Move the power switch to the "OFF" position, then unplug the unit from the electrical outlet.

2)Close the water supply line shut-off valve.

3)Remove all ice from the storage bin.

4)While maintaining a hold on the door, remove the hinge stop pin from hinge (B). Pull out the bottom of the door slightly, then gently remove the door from hinge (A). See Fig. 10.

5)Remove the top panel.

6)Remove the spout.

7)Remove the rear panels.

8)Remove the clamp securing the drain plug, then lower the drain hose into a container. Remove the drain plug to drain the water from the reservoir and evaporator assembly. See Fig. 12.

9)Disconnect the drain hose and reservoir hose from the evaporator.

10)Remove the packing.

11)Remove the socket head cap screws securing the extruding head and evaporator flange. Remove the evaporator flange, then grasp the cutter and carefully lift out the cutter and extruding head. Grasp the top of the auger and carefully lift out the auger. When pulling out the auger, the upper part of the mechanical seal should come out with it.

12)Remove the evaporator condensate drain pan.

13)Install a temporary tap-line valve on the high side, then recover the refrigerant and store it in an approved container.

14)Disconnect the inlet and outlet tubing.

15)Remove the socket head cap screws securing the evaporator to the lower housing.

16)Lift off the evaporator.

17)Inspect the mechanical seal and O-ring prior to installing the new evaporator. The mechanical seal consists of two parts. One moves along with the auger, and the other is fixed on the lower housing. If the contact surfaces of these two parts are worn, cracked or scratched, the mechanical seal may cause water leaks and should be replaced. Instructions for removing the mechanical seal and lower housing are located later in this procedure.

18)Make sure the lower mechanical seal and the O-ring are in place, then place the evaporator assembly in position. Secure the evaporator to the lower housing using the socket head cap screws.

44

Page 43 Page 45
Image 44
Page 43 Page 45
Contents 100BAF-DS 100BAF-AD 100BAF-ADDS Hoshizaki AMERICA, INC Contents Page Important Safety Information Page Specifications 100BAF Auxiliary Codes A-1 and EarlierAuxiliary Codes A-2 and Later 100BAF-DS 100BAF-DS, 2. Auxiliary Codes A-2 and Later 100BAF-AD 100BAF-AD, 2. Auxiliary Codes A-2 and Later 100BAF-ADDS 100BAF-ADDS, 2. Auxiliary Codes A-2 and Later II. General Information Construction FrontAuxiliary Codes Rear Auxiliary CodesIcemaking Unit Sequence of Operation Freeze CycleFill Cycle Auxiliary Codes A-1 and Earlier Auxiliary Codes A-2 and Later Wiring Diagram Auxiliary Codes A-2 and LaterIcemaker with Optional Drain Pump HS-0248 Performance Data 100BAF SeriesIce Production Check IV. Service DiagnosisDiagnostic Procedure Page Auxiliary Codes A-2 and Later Bin Control Check Float Switch Check Float Switch Cleaning Lower Float white Plastic Retainer ClipDrain Pump Check Optional Drain Pump HS-0248Overview Priming Instructions Float Switch Cleaning Diagnostic Charts No Ice Production Possible Cause StartupShutdown Fill Cycle and Refill Cycle Shutdown Refrigerant Recovery Removal and Replacement of ComponentsService for Refrigerant Lines Brazing Evacuation and Recharge R-134aImportant Notes for Component Replacement ComponentRemoval and Replacement of Evaporator Assembly Components Upper Bearing Wear Check Removal and Replacement of Extruding Head Removal and Replacement of Auger Removal and Replacement of Evaporator Page 5b. Lower Housing Page VI. Maintenance Maintenance Schedule Frequency Area TaskCleaning and Sanitizing Instructions Cleaning SolutionPage Sanitizing Solution Page Cleaning Solution Page Sanitizing Solution Storage Bin Drain Condenser VII. Preparing the Icemaker for Periods of Non-Use Auxiliary Codes A-1 and Earlier Skip to stepVIII. Disposal
Top Page Image Contents