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A step is also added when the speed on a variable speed stage reaches
100% without activating a new stage. Figure 3 below illustrates this.
In this example, a step is added when the first ventilation stage reaches
full speed at " temperature set point + bandwidth 1 " even though no
new stages are activated at this point. This step is called " Step 1 Hi " -
the step number is not increased as we are dealing with the same
ventilation stage as Step 1. Step 2 corresponds to the activation of
Stage 2 and Step 2 Hi defines the point where Stage 2 reaches full
speed.
Figure 3 Ventilation Curve with Variable-Speed Stages
Ventilation
Stage 3
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Stage 2
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Stage 1
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Min.
Step 0
Ventilation
0.4
(0.2
Temperature
Set Point
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Step 1
F
o
BANDWIDTH
C)
STAGE 1
o
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Step 2
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Step1 Hi
OFFSET
BANDWIDTH
STAGE 2
PF-6
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Step 2
Hi
DIFFERENTIAL
STAGE 3
PF-6.rev.14
Step 3
Room
Temperature
17
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