User manual SCOTSMAN SLC400

[. . . ] SLC400 Introduction To the owner or user: This service manual is intended to provide you, and the maintenance or service technician, with the information needed to install, start up, clean, maintain and repair this product. The SLC400 is an ice machine that produces cubed ice on 6 vertical cube freezing surfaces. The SLC400 automatically maintains the level of ice by turning on when the ice level falls, and switches off when the bin is full. The refrigeration system uses R-502 as the refrigerant. Table of Contents Specifications . [. . . ] The Harvest Termination Thermostat is closed, but there is no power thru it. Harvest: In the harvest cycle, the compressor is operating, and the hot gas valve is energized. The when the ice near the ice size thermostat sensing tube grows large enough to force water over the sensing tube, that tube looses heat, and at 38oF. This removes power from the water pump and fan and connects power to the relay coil. When the relay coil has power, it connects power to the: · Hot gas valve coil The harvest termination switch is closed, and power flows thru it to the relay coil. This keeps the relay energized, even when the ice size thermostat switches contact position as a result of ice falling away from the sensing tube. The ice size thermostat heater is on. The compressor contactor coil is on. Water Level With The unit stays in the harvest cycle until the Pump ON thermodisc on the suction line warms up to 55oF. , Water Inlet 1/8 - 1/4 At that time the harvest cycle is terminated, and the unit will go back into the freeze cycle. Whenever there is ice on the bin thermostat, it opens and stops the ice making process. Drain Outlet Elbow Bottom of Reservoir November 1994 Page 13 SLC400 Maintenance, Cleaning and Sanitizing Cleaning Schedule: · Scrub the outside of the cabinet once a week with soap and water. · Clean the water system and air cooled condenser a minimum of twice per year. If in an area of high mineral concentration in the water supply, clean water system 4 times a year. Inlet Water Valve Screens If a restriction of incoming water is suspected, the screen on the inlet side of the water valve should be inspected & cleaned. There is a strainer in the water line; the strainer screen should also be inspected for restricting minerals. The air flow thru the condenser is from front to back, so dust will build up on the fan side of the condenser fins. The fan motor, bracket and part of the shroud may be removed as an assembly. Pull shroud and fan out as an assembly, the inside fins of the condenser are now visible for cleaning. The fins of the condenser will become fouled with dirt, and must be cleaned. A vacuum cleaner with a soft brush attachment will extract most loose dust stuck to the surface of the condenser fins. . Water Cooled units: The water cooled condenser may, over time and under certain water conditions, become internally restricted by minerals. Ice Storage Bin The interior liner of the bin is in contact with a food product: ice. The storage bin must be cleaned regularly to maintain a sanitary environment. Once a week cleaning with soap and water, a hot water rinse and an air dry is a basic procedure. Every 30 days, the liner should be sanitized with a commercial ice machine sanitizer, according to the directions of the sanitizer, or with a solution of household bleach and water: 1. [. . . ] · Refrigerant should not be added except as a way to determine the proper operation of the product. If the system was low on refrigerant, there is a leak, and it must be found and repaired. · This system has a critical charge, it must be recharged with the correct amount of refrigerant as listed on the nameplate of the ice machine, or performance will suffer. · Anytime the refrigeration system has been opened, the dryer should be replaced. [. . . ]