Emerson XEV22D Service Manual Page 1
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1592025920 XEV22D GB r3.0 02.02.2011.doc XEV22D 1/1
XEV22D
DRIVER FOR STEPPER ELECTRONIC EXPANSION
VALVES
--- MANUAL FOR RELEASE 0.8 ---
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 _________________________________________________________________ 2
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 HOT-KEY ____________________________________________________ 3
14. DISPLAY MESSAGES ___________________________________________________________ 3
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.r.l.”
(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 to 20mA or 0 to 5V pressure
transducer and another one for NTC-EU or NTC-US 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 HOT-KEY.
4. VALVE CONNECTIONS AND CONFIGURATION
!!!!!!!!!! WARNING !!!!!!!!!!!!!!
To avoid any possible problem, 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 Alco EX4-EX5-EX6 5 75 50 10 500
2 Alco EX7 10 160 75 25 500
3 Alco EX8 500 10 260 80 50 500
4 Danfoss ETS-25/50 7 262 10 10 300
5 Danfoss ETS-100 10 353 10 10 300
6 Danfoss ETS-250/400 11 381 10 10 300
7 Sporlan SEI 0.5-11 0 159 16 5 200
8 Sporlan SER 1.5-20 0 159 12 5 200
9 Sporlan SEI 30 0 319 16 5 200
10 Sporlan SER(I) G,J,K 0 250 12 5 200
11 Sporlan SEI 50 0 638 16 5 200
12 Sporlan SEH(I) 100 0 638 16 5 200
13 Sporlan SEH(I) 175 0 638 16 5 200
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
SPORLAN
SEI-SEH
DANFOSS
ETS
4 BLUE WHITE BLACK
2 BROWN BLACK WHITE
3 BLACK RED RED
1 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.
VALVE
TYPE
BIPOLAR VALVES
(4 wires)
Maximum Current 0.9A
UNIPOLAR VALVES
(5-6 wires)
Maximum Current 0.33A
Summary of Contents
Page 1 - 5. ABSOLUTE MAXIMUM POWER
1592025920 XEV22D GB r3.0 02.02.2011.doc XEV22D 1/1 XEV22D DRIVER FOR STEPPER ELECTRONIC EXPANSION VALVES --- MANUAL FOR
Page 2 - 8. PARAMETER LIST
1592025920 XEV22D GB r3.0 02.02.2011.doc XEV22D 2/2 6. FRONT PANEL To display and to modify the set point. In progr
Page 3
1592025920 XEV22D GB r3.0 02.02.2011.doc XEV22D 3/3 rS Band Offset: (-12.0 to 12.0°C; -21 to 21°F) PI band offset. I
Page 4 - 16. STANDARD VALUES
1592025920 XEV22D GB r3.0 02.02.2011.doc XEV22D 4/4 The instrument is provided with an internal check verifying memory i
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