Évaluations - 1, GPA: 3
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Facilité d'utilisation
Using the cutter, lift out the auger assembly. 7) Remove the cutter and extruding head from the auger and place on the new auger. 8) Install the new auger. 9) Replace the removed parts in the reverse order of which they were removed. When replacing the spout, make sure that the drip bracket is in the channel and that safety bracket B is behind safety bracket A. See Fig. 1. 10) Replace the panels in their correct positions. 11) Plug the unit back in. 5. Removal and Replacement of Evaporator IMPORTANT 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. 1) Remove the panels. 2) Drain water from the evaporator by using the flush switch. 3) Unplug the unit from the electrical outlet. 40 4) Recover the refrigerant and store it in an approved container. 5) Remove the thumbscrews and take off the spout from the evaporator. 6) Disconnect the water hoses. 7) Remove the allen head cap screws securing the extruding head. Using the cutter, lift out the auger assembly. 8) Remove the insulation and the expansion valve bulb on the suction line. 9) Disconnect the inlet and outlet tubing. 10) Remove the allen head cap screws securing the evaporator to the lower housing. 11) Lift off the evaporator. 12) 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. 13) Make sure the lower mechanical seal is in place, then place the evaporator in position. Secure the evaporator to the lower housing using the allen head cap screws. 14) Remove the drier, then place the new drier in position. 15) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG. 16) Check for leaks using nitrogen gas (140 PSIG) and soap bubbles. 17) Evacuate the system, and charge it with refrigerant. See the nameplate for the required refrigerant charge. 18) Replace the removed parts in the reverse order of which they were removed. When replacing the spout, make sure that the drip bracket is in the channel and that safety bracket B is behind safety bracket A. See Fig. 1. 19) Replace the panels in their correct positions. 20) Plug the unit back in. 6. Removal and Replacement of Mechanical Seal and Lower Housing 6a. Mechanical Seal 1) Drain water from the evaporator by using the flush switch. 2) Unplug the unit from the electrical outlet. 3) Remove the panels. 4) Remove the thumbscrews and take off the spout from the evaporator. 5) Remove the allen head cap screws securing the extruding head. Using the cutter, lift out the auger assembly. 6) 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. 41 7) Remove the allen head cap screws securing the evaporator to the lower bearing housing. 8) Raise the evaporator up to access the lower housing. 9) Remove the O-ring and mechanical seal from the housing. If only replacing mechanical seal, proceed to step 12). WARNING To help prevent water leaks, be careful not to damage the surfaces of the O-ring or mechanical seal. 6b. Lower Housing 10) Remove the bolts securing the housing to the gear motor and remove the housing from the gear motor. If inspection of the upper bearing inside the extruding head (see "F. 1. Upper Bearing Wear Check") indicates that it is out of tolerance, replace both it and the bearing inside the lower housing. Note: Replacing the bearing requires a bearing press adaptor. If one is not available, replace the whole extruding head and housing. 11) Mount the lower housing on the gear motor. 12) Install the O-ring and lower part of mechanical seal on the lower housing. 13 ) Lower the evaporator down and secure it to the lower housing. 14) Install the auger assembly with the upper part of the mechanical seal attached. 15) Replace the removed parts in the reverse order of which they were removed. When replacing the spout, make sure that the drip bracket is in the channel and that safety bracket B is behind safety bracket A. See Fig. 1. 16) Replace the panels in their correct positions. 17) Plug the unit back in. 7. Removal and Replacement of Gear Motor 1) Drain the water from the evaporator by using the flush switch. 2) Unplug the unit from the electrical outlet. 3) Remove the panels. 4) Remove the thumbscrews and take off the spout assembly from the evaporator. 5) Remove the bolts securing the lower housing to the gear motor. Lift the evaporator up slightly. 6) Remove the bolts securi...