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Digital capacity control is achieved by axially separating the scroll members. During the time the members are separated, there is no gas compression and approximately 10% power usage. By varying the amount of time the members are separated, capacity control between 10 and 100% can be achieved. The separation is achieved by bypassing a controlled amount of discharge gas to the suction side through a solenoid valve. The lowering of the pressure in the modulating chamber allows the scrolls to separate and as a result, no pumping action takes place

Digital Capacity Control for Copeland Scroll™ Refrigeration Compressors

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4 thoughts on “Copeland Digital Scroll Compressors

  1. Yusuf Ansari says:

    Hello sir I brought digital scroll comp model ZRD72KC-TFD-433 IS RUNNING on 15 amps and after that he become very hot and from internal overload its trip can u pls explain me the problem as soon as possible. Thanks

  2. Micah James says:

    Hello Trevor, will a ZFD25KVE operate as explained in your video, with the loading and unloading bit ? I am having some issues with one on a rack system that I am assuming is low on refrigeration because it isn't unloading, its running loaded 100%.

    Thanks in advance.

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