Hoshizaki 73168 service manual Removal and Replacement of Cabinet Evaporator

Models: 73168

1 66
Download 66 pages 20.59 Kb
Page 48
Image 48

15)Replace the panels in their correct positions.

16)Plug in the unit, then move the power switch to the "ON" position to start the unit's cooling process.

D. Removal and Replacement of Cabinet Evaporator

CAUTION

1.Always install a new drier every time the sealed refrigeration system is opened.

2.Do not replace the drier until after all other repair or replacement has been made. Install the new drier with the arrow on the drier in the direction of the refrigerant flow.

3.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)Remove the refrigeration system cartridge. Perform steps 1 through 14 in "IV.B.1. Recovery Procedure." Once the refrigeration cartridge is out, proceed to step 2.

WARNING

Be careful when handling the cabinet evaporator assembly. This assembly includes a defrost heater sheathed in a glass tube. This sheathing can be easily damaged and may also cause cuts if broken. The defrost heater will also be hot after a defrost. Use gloves when handling and avoid touching the glass directly. Also prevent the defrost heater from touching other parts.

2)Remove the defrost heater, defrost thermostat, defrost and cabinet thermistors from the evaporator. See Fig. 3.

3)Remove the evaporator shroud and evaporator bracket from the evaporator.

4)Remove the insulation tubing, and disconnect the evaporator inlet and outlet tubing.

5)Remove the screws holding the evaporator to the refrigeration system cartridge.

6)Remove the evaporator and drier.

7)Place the new evaporator and new drier in position. Provide a safe means for supporting the evaporator.

Defrost Thermistor

Evaporator Bracket

Defrost Thermostat

Evaporator

Fig. 3

Evaporator Shroud

Cabinet Fan Motors

Defrost Heater

Cabinet Thermistor Bracket Cabinet Thermistor

48

Page 48
Image 48
Hoshizaki 73168 service manual Removal and Replacement of Cabinet Evaporator