机房精密空调系统的三个压力即：平衡压力、高压压力、低压压力；这三个压力是机房空调维修的重要参数。三个压力是制冷剂R22在机房空调管路中循环在不同位置所对应的压力，由于R22是在气液之间循环变化的，伴随着吸热和放热，所以外界环境的温度对其有明显的影响。一般情况下，环境温度高，压力值变大。环境温度低，压力值变小。

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因大多数机房内的电子设备均是连续运行的，工作时间长，因此要求机房专用空调在设计上可大负荷常年连续运转，并要保持极高的可靠性。舒适性空调较难满足要求，尤其是在冬季，计算机机房因其密封性好而发热设备又多，仍需空调机组正常制冷工作，此时，一般舒适性空调由于室外冷凝压力过低已很难正常工作，太原机房精密空调，机房专用空调通过可控的室外冷凝器，仍能正常保证制冷循环工作。

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