7
ENG
“EVD mini” +0300036EN - rel. 1.2 - 23.04.2018
1. INTRODUCTION
EVD mini is a range of drivers designed for the control of CAREL single-
pole electronic expansion valves used in refrigerant circuits. EVD
mini controls refrigerant superheat and optimises refrigerant circuit
performance; it guarantees significant system flexibility being compatible
with various types of refrigerants, in applications with refrigerators and
chiller/air-conditioners. It features low superheat protection (LowSH), high
evaporation pressure (MOP) and low evaporation pressure (LOP) functions.
As regards network connectivity, the driver can be connected via serial
RS485/ Modbus® to:
•
a pCO programmable controller
•
a CAREL supervisor.
Another possibility involves operation as a simple positioner with 0 to 10
Vdc analogue input signal, or as a manual positioner via RS485. EVD mini
can be supplied with LED display for information on the instant superheat
value and any active alarms, or for performing the commissioning
operations. The latter involves setting just three parameters: refrigerant,
operating mode (showcase, air conditioner, etc.) and superheat set point.
The driver can also be setup using a computer via the serial port. In this
case, the VPM program (Visual Parameter Manager) needs to be installed,
downloadable from http://ksa.carel.com, and the USB-RS485 converter
connected.
1.1 Models
P/N
Description
EVDM001N00
EVD mini 24 V with display
EVDM000N00
EVD mini 24 V without display
EVDM010N00
EVD mini 115/230 V without display
EVDM011N00
EVD mini 115/230 V with display
Tab. 1.a
1.2 Functions and main characteristics
In summary:
•
superheat control with LowSH, MOP, LOP functions;
•
compatibility with various types of refrigerants;
•
guided setup procedures first, entering just three parameters on the
user interface: refrigerant (Gas), type of control (Mode) and superheat
set point (Superheat);
•
activation/deactivation of control via digital input or remote control
via serial connection;
•
controller and valve power supply incorporated (230 V/115 V);
•
RS485 serial communication incorporated (Modbus protocol);
•
IP65;
•
operating conditions: -25T60C° (-13T140°F);
•
compatible with Carel E2V and E3V single-pole valves.
From software revision 1.6 and higher, new functions have been
introduced:
• hot gas bypass by pressure;
• hot gas bypass by temperature.
The smooth lines function has been introduced starting from software
revision 1.8.
1.3 Accessories
Pressure probe cable (see technical leaflet +050000484), pressure
probe (-1…9.3 barg, P/N SPKT0013P0) and temperature probe (P/N
NTC006HP0R).
Fig. 1.a
The ratiometric pressure probe specified as default for assembly is P/N
SPKT0013P0, with an operating range from -1 to 9.3 barg. Alternatively,
other probes can be installed, setting the corresponding parameter
accordingly. See the “Functions” chapter..
P/N
Type
P/N
Type
SPKT0053P0
-1…4.2 barg
SPKT00B6P0
0…45 barg
SPKT0013P0
-1…9.3 barg
SPKT00E3P0
-1…12.8 barg
SPKT0043P0
0…17.3 barg
SPKT00F3P0
0…20.7 barg
SPKT0033P0
0…34.5 barg
Tab. 1.b
Single-pole valve (P/N E2V**F**C1/ E3V**B**C1)
Fig. 1.b
Ultracap module (P/N EVDMU**N**)
The module guarantees temporary power to the driver in the event of
power failures, for enough time to immediately close the connected
electronic valve. It avoids the need to install a solenoid valve. The module
is made using Ultracap storage capacitors, which ensure reliability in terms
of much longer component life than a module made with lead batteries.
Fig. 1.c
Ferrite (P/N 0907879AXX)
Clamp-on ferrite for use in certain applications. See the technical
specifications table.
Fig. 1.d
Programming key with power supply (P/N IROPZKEYA0)
The key can be used to quickly program the controllers, reducing the risk
of errors. This accessory also allows fast and effective technical service,
and can be used for programming the controllers in just a few seconds,
also during the testing phase.
Fig. 1.e
USB/RS485 converter (P/N CVSTDUMOR0)
The converter ensures connection between the computer used for
configuration and the EVD mini driver.
Fig. 1.f
