Carel EVD4, User Manual, Page: 12 / 48

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ENGL
ISH
EVD
4
+030220227 - rel. 2.1 - 12.06.2008
3.1.2 List of parameters
Below is the list of parameters visible on the EVD4-UI, divided into write and read; the meaning of each
parameter is described in APPENDIX II, while APPENDIX III shows a list of the values of the reference
parameters in relation to certain typical applications.
Key:
„
= Main parameters required to start operation;
†
= Secondary parameters required for optimum operation;
— = Advanced parameters.
WRITE
Mode Parameter name Description of the parameter
Mode dependent parameters (Fig. 3.5)
COOL
CH-Superheat set
superheat set point in CH mode
„
CH-Proportional gain
PID proportional factor in CH mode
„
CH-Integral time
integral time for superheat control in CH mode
„
CH-Low Superheat
low superheat value in CH mode
†
LOP Cool Mode temperature at minimum operating pressure (MOP) in CH mode
†
MOP Cool Mode temperature at maximum operating pressure (MOP) in CH mode
†
HEAT
HP-Superheat set
superheat set point in HP mode
„
HP-Proportional gain
PID proportional factor in HP mode
„
HP-Integral time
integral time for superheat control in HP mode
„
HP-Low Superheat low superheat value in HP mode
†
LOP Heat Mode temperature at minimum operating pressure (LOP) in HP mode
†
MOP Heat Mode
temperature at maximum operating pressure (MOP) in HP mode
†
DEFROST
DF-Superheat set
superheat set point in DF mode
„
DF-Proportional gain
PID proportional factor in DF mode
„
DF-Integral time
integral time for superheat control in DF mode
„
DF-Low Superheat
low superheat value in DF mode
†
LOP Defr. Mode temperature at minimum operating pressure (LOP) in DF mode
†
MOP Defr. Mode temperature at maximum operating pressure (MOP) in DF mode
†
COMMON
Circuit/EEV ratio
percentage of the maximum capacity managed by the valve in the circuit where it is installed
„
Dynamic proportional gain
attenuation coeffi cient with change in capacity —
SHeat dead zone
dead zone for PID control
—
Derivative time
PID derivative time —
Low SHeat int. time
integral time for low superheat control
—
LOP integral time
integral time for low evaporation pressure (LOP) control
—
MOP integral time
integral time for high evaporation pressure (MOP) control —
Hi TCond. int. time
integral time for high condensing pressure control (HiTcond)
—
Hi TCond. protection
maximum condensing temperature —
Alarms delay Low SH
low superheat alarm delay
—
Alarms delay LOP
low evaporation pressure (LOP) alarm delay —
Alarms delay MOP
high evaporation pressure (MOP) alarm delay
—
MOP startup delay
MOP delay time —
Alarms delay probe error
probe error alarm delay
—
Global parameters (Fig. 3.5)
MODE
READ ONLY, received from µC 2 —
REGULATION
READ ONLY, received from µC 2
—
Refrigerant
number indicating the type of refrigerant used
l
EVD probes type
number indicating the combination of sensors used to calculate the superheat —
Valve type
number that defi nes the type of electronic valve used
l
EEV mode man.
enable/disable manual valve positioning —
Requested steps
required motor position in manual control
—
Open relay low SH
enable/disable relay opening following low superheat
—
Open relay MOP
enable/disable relay opening following MOP —
Valve alarm enable/disable valve alarm (valve not closed at shutdown alarm)
o
S1 probe limits Min value
‘zero’ scale for pressure sensor on input S1
l
S1 probe limits Max value
end scale for pressure sensor on input S1
l
S2-Pt1000 calib.
calibration index for PT1000 sensor
—
Probes offset S1
correction of the lower limit of S1 —
Probes offset S2
correction of the lower limit of S2
—
Probes offset S3
correction of the lower limit of S3 —
Enable reset to dafault
enable restore default parameters
—
Reset to default
confi rm enable default parameters —
Standby steps
number of valve standby steps
—
Blocked valve check
time after which, in certain conditions, the valve is considered as being blocked
—
Go ahead
enable restart following error —