TRICON 8111通往各个房间的循环水由制冷机组进行内部热沟通供给，使冷冻水降温为5℃～7℃，并经过冷冻水循环体系向各个房间供给外部热沟通源，内部热沟通发作的热量由冷却水循环体系经过冷却塔向空气中排放，制冷机组也称为“制冷源”。
2.2冷冻水循环体系
由冷冻泵与冷冻管道构成，从制冷机组流出的冷冻水由冷冻泵加压送入冷冻管道，在各个房间内进行热沟通，带走房间的热量，使房间内的温度下降。
2.3冷却水循环体系TRICON 8111
由冷却泵、冷却管道、冷却塔等构成。制冷机组进行热沟通，使冷冻水降温的一同，必将开释许多热量，该有些热量由冷却水吸收，冷却泵将升了温的冷却水压入水塔，使之在冷却塔中与大气进行热沟通，然后将降了温的冷却水送回到制冷机组，如此重复循环。
2.4风机盘管体系
用于将由冷冻水冷却了的冷空气吹入房间。
3制冷主机、冷冻泵和冷却泵的操控体系
3.1硬件配备及操控体系
如图1所示，选用奥越信200系列PLC作为主控单元，OYES主机模块CPU226C（继电器型），奥越信仿照量模块EM232两只，人机界面，oyes开关电源各一只，奥越信温度丈量模块热电阻模块EM231三只。

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NEW Mitsubishi Programmable Controller Q3ACPU, #15218

Van Dorn Operator Interface 6ES5398-0KB12 #28123

Nachi Fuji Koshi Servo Amplifier AUXL111 #5376

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