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Resumen del manual
Production will be slow and ice will be wetter than normal. Check the compressor amperage draw (On Machine Data Plate) after the compressor has been running for five minutes. If the compressor amp draw is less than 70% of the rated load amp, the compressor may be inefficient. These symptoms may also be caused by other problems. Therefore, it is important to use the troubleshooting trees when diagnosing a problem. See Electrical System for more information on the compressor and compressor start components. Refrigerant Pressures (Continued) The operating pressures for models utilizing the Alco thermostatic expansion valve are listed below. ALCO Manufactured Expansion Valve Model Air Water Suction Discharge Pressure PSIG Number Temp °F Temp °F Pressure PSIG 192 LAC 240 LAC EMF2306R 90°F 70°F 40 265 266 70°F 50°F 35 217 260 -20°F/50°F 40°F 33 200 263 120°F/110°F 100°F 45 365 355 EMF2306W 90°F 70°F 38 250 70°F 50°F 37 250 50°F 40°F 36 250 110°F 100°F 42 250 EMF405A 90°F 70°F 56 274 70°F 50°F 53 215 50°F 40°F 36 158 110°F 100°F 61 352 EMF450A 90°F 70°F 56 290 70°F 50°F 52 222 50°F 40°F 51 131 110°F 100°F 57 374 EMF450W 90°F 70°F 50 250 70°F 50°F 48 250 50°F 40°F 46 250 110°F 100°F 54 250 Refrigerant Pressures (Continued) The operating pressures for models utilizing the Sporlan thermostatic expansion valve are listed below. SPORLAN Manufactured Expansion Valve Model Air Water Suction Discharge Pressure PSIG Number Temp °F Temp °F Pressure PSIG 192 LAC 240 LAC EF250/255 70°F 50°F 52-56 240 90°F 70°F 55-59 310 EMF405A 70°F 50°F 50-53 225 90°F 70°F 54-57 285-290 EF/EMF450A 70°F 50°F 49-53 260 90°F 70°F 53-57 320-325 EMF450W 70°F 50°F 50-52 250 90°F 70°F 52-53 250 EMF705A 70°F 50°F 38-40 270 90°F 70°F 42-45 345-350 EF/EMF800A 70°F 50°F 45-48 275 90°F 70°F 49-51 340-345 EMF800W 70°F 50°F 41-43 250 90°F 70°F 41-43 250 EMF1005A 70°F 50°F 38-42 295-300 90°F 70°F 42-45 328-333 EMF1106A 70°F 50°F 41-43 270 90°F 70°F 43-47 320-325 EMF1106W 70°F 50°F 38-39 250 90°F 70°F 38-40 250 EMF1106R 70°F 50°F 39 215-220 257 90°F 70°F 41-43 273-278 268 EMF2306A 70°F 50°F 37-38 275 90°F 70°F 42 330-335 To properly cool the condenser, there must be adequate airflow around the machine. The ambient air temperature should not exceed 100°F (38°C). See Installation Guideline on Page A6. The condenser coil and fan blades must be kept clean. The condenser can be cleaned with compressed air or by using a brush. If a brush is used, brush in the direction of the fins taking care not to bend or distort the condenser fins. If the condenser fins are bent, this will also restrict the airflow through the condenser and the fins will need to be straightened with a fin comb. Water Cooled Condenser If the machine has been installed properly, the water flow through the condenser will be opposite the refrigerant flow. For proper water flow, the water for the condenser must be piped through the water valve first. The water condenser must have a minimum of 20 PSI (1.4 Bar) of flowing water pressure to the condenser. The water temperature to the condenser must not exceed 100°F (38°C). A water regulating valve is used to control to flow of water to the condenser. In areas that have poor water quality, the condenser may eventually become coated with mineral deposits. This will decrease the efficiency of the condenser resulting in high head pressure and high water usage. Water cooled condensers replaced because of failure due to excessive mineral build up will not be covered under warranty. Water Regulating Valve The water regulating valve controls the head pressure by regulating the amount of water flow through the condenser. The bellows of the water regulating valve are connected to the high side of the refrigeration system. As the discharge pressure rises, the bellows expand, increasing the water flow through the condenser. Adjusting the spring pressure screw at the top of the valve can change the rate of water flow. The unit should be run for 10 minutes, then the valve should be adjusted as needed to maintain a refrigerant discharge pressure of 250 PSI (18.3 Bar). Water exiting the condenser should be between 100°F (38°C) and110°F (43°C). When the machine is off, either on full bin or when the selector switch is in the off position, the regulating valve will close completely, stopping the flow of water through the condenser. If the water flow does not stop when the machine is not running, the valve should be replaced. Air Cooled Condenser (Remote) See Pages F10 or go to Page A10 for remote condenser installation. High Pressure Safety The high pressure safety control is a normally closed control. If the discharge pressure becomes too high, the high pressure safety control will open and shut the machine off. The high pressure safety control is an automatic reset type and will close and restart the machine when the pressure drops. The high pressure safety control is used on all water cooled and remote machines and some air cooled machines. Expansion Valve The expan...
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