G. 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 repairs or replacement have been made.
1)Turn off the power supply.
2)Remove the panels and the top insulation over the evaporator.
3)Recover the refrigerant and store it in an approved container.
4)Remove the spray tubes and the insulations at the "U" shaped notch where the refrigeration tubings pass through the molded chassis.
5)Disconnect the evaporator tubing.
6)Remove the pop rivets securing the evaporator, 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)Check for leaks using nitrogen gas (140 PSIG) and soap bubbles.
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.
H.Removal and Replacement of Water Regulating Valve -
Water Cooled Model Only
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)Turn off the power supply.
2)Close the water supply line
3)Remove the panels.
4)Recover the refrigerant and store it in an approved container.
5)Disconnect the capillary tube at the condenser outlet.
6)Disconnect the
44