Emerson Dixell IEV24D - Page 49

1592026260 IEV22-24D GB r.1.0 21.02.2019 IEV 49/60
LoP
Minimum
operating
pressure
Evaporation
pressure < LOP
activation
threshold
delayed by Et39
seconds
Automatic action of the controller to
counteract the LoP;
Active alarm relay output if enabled
by parameter;
Enable the buzzer;
icon flashes;
Code of alarm on the display.
Automatic.
The condition to
come out from
minimum
operating
pressure are:
- the equivalent
temperature of
the pressure
probe exceeds
Et17/Et37 +
4.0°C
- Et17 <
Evaporation
pressure
converted to
temperature <
Et17+4°C and
superheating <
Et13 (low
superheating set
point)
After LOP alarm
reset, the driver
carries out the
aperture of the
valve by
Et16/Et36 steps
at each second
of operation
HSH
Maximum
super heating
value
Super heating
value > High
superheating
threshold Et12 /
Et32 delayed by
Et41 seconds
Automatic action of the controller to
counteract the HSH;
Active alarm relay output if enabled
by parameter;
Enable the buzzer;
icon flashes;
Code of alarm on the display.
Automatic when
the superheating
is less or equal
to Et12/Et32 –
1.0°C
LSH
Minimum
super heating
value
Super heating
value < Low
superheating
threshold Et13 /
Et33 delayed by
Et42 seconds
Automatic action of the controller to
counteract the LSH;
Active alarm relay output if enabled
by parameter;
Enable the buzzer;
icon flashes;
Code of alarm on the display.
Automatic when
the superheating
temperature is
higher or equal
to Et13/Et33 +
1.0°