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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
