DOTECH EVC10B Series Manuale d'uso - Pagina 7
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5.
Control mode
: Superheat control ( DIP SW1 : OFF, DIP SW4 : OFF )
In most cases, it would aim to control superheat.
Definition
Description
COMP
Compressor
EEV
Electronic expansion valve
Temp. sensor of evaporator
T-sens
outlet
Suction pressure sensor of
P-sens
compressor
Application parameter
Function
Superheat set point
Start open ratio
Start open ratio duration time
P: Proportional gain
I:Integral time
D:Derivative time
: Drive function ( DIP SW1 : ON, DIP SW4 : ON )
※ To use drive function of expansion valve using external reference signal, change operation
mode to drive mode. At this time, it will be operated when Run should be ON. Expansion valve
will be closed immediately when turning OFF Run.
State Message
:
CODE
Operation stop
STP
CAL
Expansion valve initialization
Pump down operation
PDN
Definition
Description
Evaporator
Evaporator
Electronic expansion valve
EVC10
controller
Run
Run / Stop switch
CODE
Min.
Max.
0.5
30
SH
BIR
0
100
0
60
SDT
DFR
0.1
50.0
0
999
I RT
DRT
0
999
Description
: Temperature control (Hot gas bypass) ( DIP SW1 : OFF, DIP SW4 : ON )
It will be used when controlling temperature of control object accurately by
adjusting by-pass amount of hot gas.
Definition
Description
COMP
Compressor
EEV
Electronic expansion valve
Temp. sensor of
T-sens
evaporator outlet
Thermostatic expansion
TEV
valve
Application parameter
Default
Function
6.0 K
Set point for control target**
0 %
Start open ratio
0 Sec.
Start open ratio duration time
3.0 %
P: Proportional gain
120 Sec.
I:Integral time
30 Sec.
D:Derivative time
** Parameter will be changed and applied from superheat set point to temperature set point of
control object.
: Manual control mode ( DIP SW1 : ON, DIP SW4 : OFF )
- Users can maintain valve open ration arbitrarily. Input it using +/- button
after setup operation mode to manual mode.
At this time all LED on the left side will be flickering.
In case of manual control mode, Run should be ON. Expansion valve will be closed immediately
when turning OFF Run
-7-
Definition
Description
Evaporator
Evaporator
Electronic expansion valve
EVC10
controller
Run
Run / Stop switch
CODE
Min.
Max.
-100
+100
SH
BIR
0
100
0
60
SDT
DFR
0.1
50.0
0
999
I RT
0
999
DRT
EVC10B R20140821
Default
6.0 ℃
0 %
0 Sec.
3.0 %
120 Sec.
30 Sec.