10)Evacuate the system, and charge it with refrigerant. For
11)Replace the solenoid in its correct position.
12)Replace the panels in their correct positions.
13)Turn on the power supply.
E. Removal and Replacement of 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)Turn off the power supply.
2)Remove the panels and the front and top insulation.
3)Recover the refrigerant and store it in an approved container.
4)Remove the spray tubes. Remove the insulation at the notch where the refrigeration tubing passes through the molded chassis.
5)Disconnect the evaporator tubing.
Note: The pipes in the evaporator case are specially coated to resist corrosion. Use sandpaper to remove the coating from the brazing connections before unbrazing.
6)Remove the pop rivets securing the evaporator, then lift out the evaporator.
7)Install the new evaporator.
8)Remove the drier, then place the new drier in position.
9)Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG.
10)Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of refrigerant to the system (if using an electronic leak detector), and then raise the pressure using nitrogen gas (140 PSIG). DO NOT use
11)Evacuate the system, and charge it with refrigerant. For
12)Replace the removed parts in the reverse order of which they were removed.
13)Replace the top insulation and the panels in their correct positions.
14)Turn on the power supply.
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