EMKO EPC-3 - Cooling Control: ON-OFF and Proportional Modes; Cooling (ON-OFF Control) Logic; Cooling (Proportional Control)

2. PROPORTIONAL CONTROL MODE
If the Temperature(NOTE1) is higher than settemp(NOTE2) plus COOLING PARAMETERS PAGE HYST
control will be continuously on. If the Temperature(NOTE1) is lower than the settemp(NOTE2) then, control
will be continuously off. If the measured temperature(NOTE1) is between settemp(NOTE2) and
settemp(NOTE2) plus COOLING PARAMETERS PAGE HYST then, control output will be on for a portion of
the COOLING PARAMETERS PAGE PERIOD.
Process Output rises from 0% to 100% in
COOLING PARAMETERS PAGE PROP RAMP period.
This feature is called output filter.
If COOLING PARAMETERS PAGE PROP RAMP is zero then output filter
is off.
NOTE1:
If COOLING PARAMETERS PAGE SENSOR parameter is ROOM1;
Temperature = ROOM1 sensor’s temperature,
If COOLING PARAMETERS PAGE SENSOR parameter is ROOM2;
Temperature = ROOM2 sensor’s temperature,
If COOLING PARAMETERS PAGE SENSOR parameter is ROOM1&2;
Temperature =( ROOM1 sensor’s temperature + ROOM2 sensor’s temperature) / 2.
NOTE2:
If COOLING PARAMETERS PAGE SET POINT is RELATIVE and if curve is enabled;
Settemp= HOUSE TEMP from curve + SET VALUES PAGE TEMP.COOL +
COOLING PARAMETERS PAGE OFFSET,
If COOLING PARAMETERS PAGE SET POINT is RELATIVE and if curve is disabled;
Settemp= SET VALUES PAGE TEMP.HOUSE + SET VALUES PAGE TEMP.COOL +
COOLING PARAMETERS PAGE OFFSET,
If COOLING PARAMETERS PAGE SET POINT is ABSOLUTE;
Settemp= SET VALUES PAGE TEMP.COOL + COOLING PARAMETERS PAGE OFFSET.
COOLING PARAMETERS PAGE
PROP RAMP
Process
Output
0%
Time [sec]
100%
54
COOLING PARAMETERS PAGE
HYST
Process
Output
100%
50%
0%
Settemp
(NOTE2)
COOLING PARAMETERS PAGE
OFFSET
Process Value [°C]