DCS RF151 - Connecting the Water Supply

14
3.3 compreSSor
The compressor is the heart of the refrigeration system. However, it also relies on other parts of the system to function. Make
certain that the other parts of the system are functioning correctly before determining that the compressor is faulty.
IMPORTANT
The compressor is protected from power interruption with a start delay built into the control to prevent high pressure startup
(see Section 1.11, Operation - Selector Switch in the “ON” Position). DO NOT MISTAKE THIS FOR A FAULTY COMPRESSOR.
The following must also be observed before concluding the compressor is faulty:
Low high side pressures, warm evaporator plate, cool condenser coil, or little or very low current draw from the unit will indi-1.
cate a faulty compressor.
Check for continuity between the compressor terminals and the shell or chassis ground of the compressor. If continuity is 2.
found, the compressor is faulty and will need to be replaced.
Check for resistance between all compressor terminals. The resistance will vary from terminal to terminal and from compres-3.
sor to compressor due to age and use. If no resistance is found, the compressor is faulty and will need to be replaced.
Removal:
Disconnect power, water line, and drain line. If a drain pump is used, it will need to be disconnected and removed.1.
Remove the back panel and lower shroud (see Figure 3.3).2.
Remove the grill by removing the two or four screws (depending on grill style) and disconnecting the three wires to the 3.
rocker switch.
Remove the drain valve (see Figure 4.1).4.
Remove the water valve (see Figure 4.2).5.
Take out the two screws that secure the top of the electrical bracket located in the front of the mechanical area (see 6.
Figure 3.4).
Remove the six screws that secure the baseplate to the cabinet on the bottom of the unit (see Figure 3.5).7.
Gently slide the mechanical out the back of the unit just enough to gain access to the drier assembly (see Figure 3.6).8.
Install sealed system access valve(s) and recover refrigerant. After recovering, be sure to cap o the access valve to prevent 9.
contamination of the system.
Remove the cap from the back of the compressor.10.
Disconnect the compressor overload and starter relay at the compressor by pulling o. You will need to disconnect the two 11.
wires from the old overload and starter relay and then connect the new one. The red (hot) wire goes on the overload and the
white (neutral) wire will go on the starter.
Unbraze and remove the capillary tube from the drier assembly.12.
Unbraze the tube from the hot gas valve at the tee tting on the drier assembly (see Figure 3.1).13.
Unbraze and remove the drier assembly.14.
Unbraze and remove the suction line at the compressor (see Figure 3.8).15.
Unbraze the hot gas discharge line at the compressor (see Figure 3.8).16.
Remove the compressor by removing the two lock-nuts on the mounting plate of the compressor (see Figure 3.8). Lift the 17.
compressor o of the carriage bolts.
SEALED SYSTEM COMPONENTS