dIXEL
Operating instruction manual
1592025920
1592025920 XEV22D GB r1.0 2008.09.05.doc XEV22D 1/4
XEV22D
DRIVER FOR STEPPER ELECTRONIC EXPANSION
VALVES
CONTENTS
1.
GENERAL WARNING_________________________________________________1
2. GENERAL DESCRIPTION _____________________________________________1
3. WIRING CONNECTIONS ______________________________________________1
4. VALVE CONNECTIONS AND CONFIGURATION ___________________________ 1
5. ABSOLUTE MAXIMUM POWER ________________________________________1
6. FRONT PANEL ______________________________________________________1
7. USER INTERFACE___________________________________________________2
8. PARAMETER LIST ___________________________________________________2
9. DIGITAL INPUTS ____________________________________________________3
10. FORCED OPENING __________________________________________________3
11. ELECTRICAL CONNECTIONS__________________________________________3
12. RS485 SERIAL LINE__________________________________________________ 3
13. HOW TO USE THE HOTKEY ___________________________________________ 3
14. DISPLAY MESSAGES ________________________________________________4
15. TECHNICAL DATA ___________________________________________________4
16. STANDARD VALUES _________________________________________________4
1. GENERAL WARNING
1.1 PLEASE READ BEFORE USING THIS MANUAL
• This manual is part of the product and should be kept near the instrument for easy and quick
reference.
• The instrument shall not be used for purposes different from those described hereunder. It
cannot be used as a safety device.
• Check the application limits before proceeding.
1.2 SAFETY PRECAUTIONS
• Check the supply voltage is correct before connecting the instrument.
• Do not expose to water or moisture: use the controller only within the operating limits avoiding
sudden temperature changes with high atmospheric humidity to prevent formation of
condensation
• Warning: disconnect all electrical connections before any kind of maintenance.
• Fit the probe where it is not accessible by the End User. The instrument must not be opened.
• In case of failure or faulty operation send the instrument back to the distributor or to “Dixell
S.p.A.” (see address) with a detailed description of the fault.
• Consider the maximum current which can be applied to each relay (see Technical Data).
• Ensure that the wires for probes, loads and the power supply are separated and far enough from
each other, without crossing or intertwining.
• In case of applications in industrial environments, the use of mains filters (our mod. FT1) in
parallel with inductive loads could be useful.
2. GENERAL DESCRIPTION
The XEV22D module is able to drive a large variety of stepper electronic
expansion valves. XEV22D permits to regulate the superheat (SH) of the fluid that
runs into refrigerating unit in order to obtain optimized performance and a
functioning of the evaporator independent by climatic or load conditions. XEV22D
modules are equipped with two probe inputs, one for 4÷20mA or 0÷5V pressure
transducer and another one for Pt1000 or NTC temperature probe. A LAN
connection permits to transmit the pressure signal to others XEV modules in order
to use only one pressure transducer in multiplexed cabinet applications. There are
also two configurable digital inputs, the first one is free of voltage and the other
ones is at high voltage in order to simplify connections with cooling request signal.
With the useful display it’s possible to see the value of superheat (SH), the degree
of opening of the valve or the probe values, the local keyboard allows to program
the instrument without any other devices. To complete instrument equipment, a
RS485 serial link permits to connect XEV22D to
dIXEL monitoring and
supervising systems.
3. WIRING CONNECTIONS
The superheat regulation is performed only when the cooling digital input is
enabled. The following scheme shows how the device takes the request of cooling:
Please see the following scheme to make the right wirings. With "First Level" are
indicated the connections on the floor of the 4 DIN module and, of course, with
"Second Level" the connections of the 1st floor that are only for the stepper motor
of the valve and for HOTKEY.
4. VALVE CONNECTIONS AND CONFIGURATION
!!!!!!!!!! WARNING !!!!!!!!!!!!!!
To avoid possible problems, before connecting the valve configure the driver by
making the right changes on the parameters. Select the kind of motor (tEU
parameter) and check if the valve is present in tEP parameter table reported here
below:
tEP Model
LSt
(steps*10)
uSt
(steps*10)
CPP
(mA*10)
CHd
(mA*10)
Sr
(step/s)
0
Manual settings
Par Par Par
Par
Par
1 Sporlan SEI 0.5-20 10 159 20 5 200
2 Sporlan SEI 30 20 319 20 5 200
3 Sporlan SEH 50-250 40 638 20 5 200
4 Alco EX5-EX6 10 75 40 10 450
5 Alco EX7 25 160 75 25 330
6 Alco EX8 330 step/s 25 260 80 50 330
7 Alco EX8 500 step/s 25 260 80 50 500
8 Danfoss ETS-25/50 20 262 14 8 120
9 Danfoss ETS-100 30 353 14 8 120
10 Danfoss ETS-250/400 35 381 14 8 120
If you can see your valve on the table, please select the valve through tEP
parameter. In this way, you can be sure of a right configuration.
About the connection, please pay attention to the following table to have a quick
reference on the connection mode for valves of different manufacturer. In any case,
the unique and valid reference has to be considered the datasheet made by
manufacturer of the valve:
4 WIRES VALVES (BIPOLAR)
Connection
numbering
ALCO EX* ALCO EX5/6
SPORLAN
SEI-SHE
DANFOSS
ETS
4 WHITE BLUE WHITE BLACK
2 YELLOW BROWN BLACK WHITE
3 BROWN BLACK RED RED
1 GREEN WHITE GREEN GREEN
5-6 WIRES VALVES (UNIPOLAR)
Connection
numbering
SPORLAN SAGINOMIYA
4 ORANGE ORANGE
2 RED RED
3 YELLOW YELLOW
1 BLACK BLACK
5 – Common GRAY GRAY
AFTER MAKING THE CONNECTION, PLEASE SWITCH OFF AND ON THE XEV
CONTROLLER IN ORDER TO BE SURE OF THE RIGHT POSITIONING OF THE
VALVE.
5. ABSOLUTE MAXIMUM POWER
XEV22D is able to drive a wide range of stepper valves, in the following table are
indicated the maximum values of current that the actuator can supply to the stepper
wiring. The
dIXEL transformer to use is the TF20D.
NOTE: the electrical power absorption of the valve can be unrelated to refrigeration
power that valve has. Before using the actuator, please read the technical manual
of the valve supplied by the manufacturer and check the maximum current used to
drive the valve in order to verify that they are lower than those indicated below.
BIPOLAR VALVES
(4 wires)
Maximum Current
0.9A
VALVE
TYPE
UNIPOLAR VALVES
(5-6 wires)
Maximum Current
0.33A
6. FRONT PANEL
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