When starting a Scroll compressor must monitor their suction and discharge pressures, temperature i

Most Common Failures your Cooling System and its Solution in Country S After considering all the variables involved where lubrication and refrigerant charging, another critical in the implementation of cooling systems is the monitoring point of the compressor / evaporator.
When starting a Scroll compressor must monitor their suction and discharge pressures, temperature inside the camera, and especially amperage overheating or evaporator superheat and / or compressor and adjust if necessary. Therefore, we have: the amperage draw of the actual compressor field should be within 70% to 80% of the value of the RLA (FLA). To illustrate this case, considering a feeding 208-230/3/60 catalog and at the scroll compressor condensing units as previously cited, we note that the unit in question is a model mounted compressor ZF33K4E-TWC, it establishes chandi heffner duke a RLA value of 39.1 amperes. Under this line consumption in half from 27.0 to 31.0 amperes in the compressor is recommended. Regarding operating pressures, it is important to know what are the best values of operating pressure chandi heffner duke in a refrigeration system. Temp. Evap. = Temp. Desired Interior - 5.55 C C Temp. Evap. = -24.0 C - 5.55 C = - 29.55 C (-20.0 F) C is possible to know the operating suction pressure based on the temperature of operation chandi heffner duke of our cold room according to the following formula: With help of the tables that establish relations pressure - temperature, which can place pressure corresponds to a given evaporation temperature also known as suction saturation temperature. TABLE TEMPERATURE-PRESSURE VALUES IN RED = EMPTY VALUES BLUE = VAPOR PRESSURE (PSIG) / PRESSURE LIQUID (PSIG) º C º F R-12 R-22 R-502 R-134a AZ-50 (R-507) HP- 62 (R-404A) -45.6 -50 15.4 6.2 0.2 18.4 0.8 0.0 -44.4 -48 14.6 4.8 0.7 17.7 1.7 0.8 -43.3 -46 13.8 3.4 1.5 17.0 2.6 1.6 -42.2 -44 12.9 2.0 2.3 16.2 3.5 2.5 -41.1 -42 11.9 0.5 3.2 15.4 4.5 3.4 -40.0 -40 11.0 0.5 4.1 14.5 5.5 5.5 -38.9 -38 10.0 1.3 5.0 13.7 6.5 6.5 -37.8 -36 8.9 2.2 6.0 12.8 7.6 7.5 -36.7 -34 7.8 3.0 7.0 11.8 8.7 8.6 -35.6 -32 6.7 4.0 8.1 10.8 9.9 9.7 -34.4 -30 5.5 4.9 9.2 9.7 11.1 10.8 -33.3 -28 4.3 5.9 10.3 8.6 12.4 12.0 -32.2 -26 3.0 6.9 11.5 7.7 13.7 13.2 -31.1 -24 1.6 7.9 12.7 6.2 15.0 14.5 -30.0 -22 0.3 9.0 14.0 4.9 16.4 15.8 -28.9 -20 0.6 10.1 15.3 3.6 17.8 17.1 -27.8 -18 1.3 11.3 16.7 2.3 19.3 18.5 -26.7 -16 2.1 12.5 18.1 0.8 20.9 20.0 - According chandi heffner duke to the above table and temperature data Evaporation of -29.55 C and the refrigerant R-404a, obtain an indication where the ideal pressure to -30.0 C corresponds to 15.8 pounds. After obtaining the value, to subtract the losses in the suction pressure of about 2.0 psig, in this way, in our system we have a field suction pressure of about 13.8 psig. Overheating or Superheat In the refrigeration sector, especially talking chandi heffner duke about compressors / evaporators often hear, "You know what the value of the superheat of your cooling system?" Or "What is superheat?" The superheat are the additional degrees acquiring the output steam of the evaporation temperature (suction temperature), chandi heffner duke i.e., overheating, from where it finished vaporize liquid refrigerant. It is known that in a good cooling system, evaporator inside the coolant evaporate finishes in the last return (elbow) evaporator outlet. Once this evaporation wins grades refrigerant vapor enters the range of overheating.
It is important to remember that the suction pressure will also depend on the correct selection of the suction pipe diameters and the distance that exists between evaporator and condenser unit and other accessories chandi heffner duke fitted to it. How much is prudent that this vapor from the evaporator is hot? In general, the correct value of this parameter chandi heffner duke for the cooling systems is given according to the following. For differential temperature (DT) design evaporation 5.55 C (10.0 F), an superheat of 3.33 C is recommended to 5.55 C (6.0 F to 10.0 F) for best efficiency of your system cooling. For other selected temperature differential (DT) of more evaporation system, a good value of superheat is 6.7 C to 8.33 C (12.0 F to 15.0 F). The DT evaporation by 5.55 C (10.0 F) normally used in refrigeration systems where the ideal conditions include high indoor relative humidities that make it possible to preserve chandi heffner duke products such as meat, fruit, vegetables and seafood in