Danfoss VLT FC 103 Operating Instructions Manual page 32

Refrigeration drive

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Start Up and Functional Tes...

Choose with/without bypass valve

I I llustration 3.9

Select open or closed loop

Illustration 3.10

NOTE

Internal/Closed loop: The FC 103 will control the

application directly using the internal PID control within

the frequency converter and needs an input from an

external input such as a temperature or other sensor which

is wired directly into the frequency converter and controls

from the sensor signal.

External/Open loop: The FC 103 takes its control signal

from another controller (such as a pack controller) which

gives the frequency converter e.g. 0-10 V, 4-20 mA or FC

103 Lon. The frequency converter will change its speed

depending upon this reference signal.

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(812) 702-47-50

VLT Refrigeration Drive Operating Instructions

Select sensor type

Illustration 3.11

Settings for sensor

Illustration 3.12

Info: 4-20 mA feedback chosen - connect accordingly

Illustration 3.13

MG16J102 - VLT is a registered Danfoss trademark

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