32
ASSA ABLOY Hospitality
66 8003 016-3
4.2.2.2 Proportional
If 'Proportional' is
chosen as HVAC type, the
parameters shown in
Figure 35 (which shows
the default values) are
applicable. For details
about each parameter,
see
Table 6
below.
Figure 35
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 6
