Watlow CPC400 Manuel d'utilisateur télécharger pdf (Page 84)

Chapter 3: Operation and Setup CPC400 Series User’s Guide

70 Watlow Anafaze Doc. 0600-2900-2000

• If the primary loop has both heat and cool outputs,

then the set point of the secondary loop is equal to the

Cascade low SP parameter when the cool output is at

100 percent, and is equal to the Cascade high SP when

the heat output is at 100 percent. See Figure 3.9.

• If the primary loop has only a heat output, then the set

point of the secondary loop is equal to the Cascade low

SP parameter when the heat output is at 0 percent,

and is equal to the Cascade high SP parameter when

the heat output is at 100 percent. See Figure 3.10.

• If the primary loop has only a cool output, then the set

point of the secondary loop is equal to the Cascade low

SP parameter when the cool output is at 100 percent,

and is equal to the Cascade high SP parameter when

the cool output is at 0 percent.

Figure 3.9 Secondary Set Point When Primary

Loop Has Heat and Cool Outputs

Figure 3.10 Secondary Set Point When Primary

Loop Has Heat Output Only

Set Point of Secondary Loop

(Engineering Units)

High Set Point

Low Set Point

-100%

Output of Primary Loop (Percent of Full Scale)

100%

Set Point of the Secondary Loop

(Engineering Units)

High Set Point

Low Set Point

Output of Primary Loop (Percent of Full Scale)

100%

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Watlow CPC400 Manuel d'utilisateur Page 84