1592026260 IEV22-24D GB r.1.0 21.02.2019 IEV 31/60
EXAMPLES OF CONNECTION TO 5-WIRE VALVES UNIPOLAR
Due to possible variations in the colour of the wires, before any installation it is recommended to check
the technical documentation of the valve to check for any change.
Terminal number
SPORLAN
SAGINOMIYA
4
ORANGE
ORANGE
2
RED
RED
3
YELLOW
YELLOW
1
BLACK
BLACK
5 - Common
GREY
GREY
The maximum distance between an IEV valve driver and the valve
must not exceed 10 metres
.
Shielded cables with a section greater than or equal to 0.325 mm² (AWG22) must be used.
7.4
Alarm management
High superheating alarm
The high superheating alarm is generated when the calculated superheating is higher or equal to
Et12/Et32
for the Et49 time.
In the event of an alarm, the driver sets the valve to the maximum aperture.
The alarm is cleared when the superheating is less or equal to
Et12/Et32
–
1.0°C.
Low superheating alarm
The low superheating alarm is generated when the superheating temperature is equal or less than
Et13/Et33
for the Et50 time.
In the event of an alarm, the driver sets the valve to the minimum aperture (Et20 / Et40).
The low superheating alarm is cleared when the superheating temperature is higher or equal to
Et13/Et33 + 1.0°
Maximum MOP operating pressure alarm
The MOP alarm threshold is expressed as a temperature value and is equal to the pressure of probe 3
and probe 4 converted into a temperature value.
The MOP alarm is triggered when the equivalent temperature of the pressure probe exceeds Et15/Et35
for the Et48 time.
If the MOP alarm is still active, any low and high superheating alarms are reset.
When the alarm is active, the drive closes the valve by Et16/Et36 steps at each second of operation.
If the equivalent temperature of the pressure probe drops below Et15/Et35 - 1.0°C, the driver carries out
the aperture of the valve by Et16/Et36 steps at each second of operation.
The alarm is cleared only when the superheating temperature drops below the superheating setpoint
value.