Download FUNCTIONAL TEST aSENSE VAV

Figure 7 The control signal of air demand with set point
Terminal
Standard
Standard settings*
configuration
Standard
function
Out(1)
0-10VDC
600-900 ppm CO2
o
23-24 C
o
Cut off 18-17 C
Air control
alt 1
Out(2)
0-10VDC
600-900 ppm CO2
Air control
alt 2
Relay
Closed
Open
>600 ppm CO2
< 500 ppm CO2
Air control
alt 3
Out(4)
0-10 VDC
20-18 C
o
Configuration of
this sensor
Settings of this
sensor
Heat control
Table I. Default configuration of aSENSE VAV.
Function description in details with all parameter settings is in a separate document.
Formulas for calculation of output values
Configuration
Output Range
Formula for calculation
0-10 VDC
0-2000 ppm CO2
CO2 value = Volt/10*2000
o
2-10 VDC
Temperature value in C = Volt/10*50
0-2000 ppm CO2
CO2 value = (Volt –2)/8*2000
o
4-20 mA
o
0-50 C
Temperature value in C = (Volt –2)/8*50
0-2000 ppm CO2
CO2 value = (mA-4)*2000/16
o
0-50 C
a-b
o
0-50 C
o
Temperature value in C = (mA-4)*50/16
c–d
Value = (reading-a)/(b-a)*(d-c)+c
a = lowest value of the configuration
b = highest value of the configuration
c = lowest value of the range
d = highest value of the range
Table II. Calculation of CO2 value and temperature value for aSENSE VAV
Document
Rev
Page
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