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ASSA ABLOY Hospitality
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4.2.1.2 Proportional
If 'Proportional' is
chosen as HVAC type, the
parameters shown in Figure
31 (which shows the default
values) are applicable. For
details about each
parameter, see Table 4
below.
Figure 31
Parameter Description
Prop. band/gain The value at Prop. band/gain describes the regulator output of the HVAC system
related to the difference between measured temperature and set temperature.
Example:
Measured temperature = 23 ºC
Set temperature = 20 ºC
Gain = 1.9V
The regulator will set 3x1.9V=5.7V on the output (if all default values are used).
The range for the regular output value is 0-10V.
Integral gain/reset The Integral gain/reset describes to the HVAC system regulator what gain it can
use when integrating the previous average temperature values, in order to settle
the temperature around the desired set value.
Derivative time The Derivative time describes to the HVAC system regulator what gain it can use
when looking at the rate of the temperature change.
Cycle time The Cycle time describes how fast the HVAC system regulator makes calculations
for a new output.
Min output At Min output, the minimum output voltage is chosen; can be 0V, 1V or 2V.
Max output At Max output, the maximum output voltage is chosen; can be 5V or 10V.
Table 4
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