User manual WHIRLPOOL WRF535SMBB USE & CARE GUIDE

[. . . ] 11 COMPONENT DESCRIPTION: Water System . 16 HARVEST CYCLE - HOT GAS BYPASS CLEANING & SANITIZING . 21 SERVICE DIAGNOSIS: Electrical and/or Adjustments . 22 SERVICE DIAGNOSIS: Refrigeration and/or Mechanical . [. . . ] Tubing will become frosted at the top of the evaporator plate. Freezing time will range between 15 and 18 minutes. Longer time for temperatures above 70 degrees F. and shorter time required when temperatures are below 70-degrees F. Average complete cycle time is about 18 minutes. April 1995 Page 13 FREEZE PORTION HARVEST PORTION FRONT VIEW OF TIMER ACTUATOR BUTTON MICROSWITCH CAM CONTROL BOX Cube Size Control Master Switch Compressor Switch Timer Bin Thermostat WRF535SMBB INITIAL START UP 10. Check Cube Size To produce SMALLER sized ice cube: Locate cube size control knob, in the front of the control box. Rotate one eighth of a turn COUNTER Clockwise. Observe size of the ice in the next ice cube harvest and adjust in one eighth turn or less increments, until correct ice cube is achieved. To produce LARGER ice cube: Locate cube size control on the front of the control box Rotate the adjusting knob one eighth of a turn Clockwise. Observe size of ice cubes in the next cube harvest and adjust in one eighth turn or less increments, until correct ice cube size is achieved. The machine will have to harvest all of the cubes before it goes back into the freeze cycle. After that selected length of time, the timer will switch the icemaker into the harvest cycle, through the contacts of the timer assembly microswitch. Low Temperature Freeze: When the outside air temperature is low, the Head Pressure Regulator will close off the liquid line to the receiver, causing liquid refrigerant to back up into the condenser until the head pressure builds up to 240 PSIG. While this is occurring, the head pressure regulator passes discharge gas into the receiver to keep the refrigerant flowing. REFRIGERATION SCHEMATIC Liquid Line Fan Motor Discharge Line Head Pressure Control Valve Discharge Coil Heat Exchange Filter Hot Gas Valve (Closed) Suction Line Receiver Compressor Crankcase Heater Liquid Line Valve Water Valve (Closed) Filter/Dryer TXV Evaporators Pump King Valve Drain October 1994 Page 15 WRF535SMBB HARVEST CYCLE - HOT GAS BYPASS When the timer switches the icemaker into the harvest cycle, high pressure, high temperature refrigerant gas discharged from the compressor flows through the hot gas solenoid valve into each evaporator plate. During this cycle, the refrigerant bypasses the condenser. In the electrical circuit, both the compressor and the water pump are operating and the hot gas solenoid valve is energized and OPEN and the water inlet solenoid valve is OPEN. The finished ice cubes are released from the sides of each evaporator plate by the warming effect of the hot gas condensing in each evaporator plate and the water cascading over the ice cubes. The released ice cubes drop into the ice storage bin below. At the end of the harvest cycle, the timer cam will push the actuator arm to the microswitch IN. If the ice level control is still CLOSED, a whole new cycle will begin. If the ice level control is OPEN, the icemaker will begin to shut OFF. Pump Down Cycle: When the ice level control is open at the end of the harvest cycle, power is removed from the liquid line valve coil, and the pump down cycle begins. [. . . ] 17 18 20 21 23 24 26 28 29 31 33 35 37 39 41 43 46 48 50 53 55 58 60 63 66 69 72 75 78 81 85 88 91 95 99 102 106 110 114 118 123 127 132 136 VAPOR TEMP. 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 142 144 146 148 150 152 154 156 . 146 150 155 161 166 171 177 182 188 194 200 206 212 219 225 232 239 246 253 260 268 275 283 291 299 307 316 324 333 342 351 360 370 379 389 399 409 420 430 441 452 464 475 487 October 1994 Page 27 WRF535SMBB REFRIGERATION SERVICE General Information: Access Valves: To use the access valves: Remove the cap from the stem, use a 3/16" allen Scotsman recommends that any work on the wrench to check that the valve is CLOSED. The refrigeration system only be done when it is certain remove the core cap. [. . . ]