MCC 68AC430-100, Руководство по эксплуатации и обслуживанию

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4--10
©
2012 Mobile Climate Control T-353 Rev. 01/2013
h. From the temperature/pressure chart, determine
the saturation temperature corresponding to the
evaporator outlet pressure.
i. Note the temperature of the suction gas at the ex ­
pansion valve bulb. Subtract the saturation tem ­
perature from this temperature. The difference is
the superheat of the suction gas.
j. The superheat may cycle from a low to high read ­
ing. Monitor the superheat taking readings every
3-5 minutes for a total of 5-6 readings. Calculate
the superheats, add the readings and divide by the
number of readings taken to determine average su ­
perheat. The superheat should be 12 ± 1.8 ° F.
k. If superheat is not within tolerance, replace the
valve.