7
ENG
“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018
1. INTRODUCTION
EVD ice is an electronic superheat controller for Carel unipolar expansion
valves. EVD ice has been specially designed to be installed near the valve,
directly on the refrigerant circuit, simplifying installation and making
electronic expansion valve technology available directly on board the
unit.
The plastic cover material on EVD ice guarantees total protection,
allowing the controller to operate in particularly difficult environmental
conditions, such as low temperatures and high humidity (condensation).
EVD ice can be installed directly on a unit cooler/evaporator inside a cold
room.
The controller is already fitted with sensors, signal and power cables:
to complete the system, simply select the most suitable valve body
and pressure transducer for the required cooling capacity from the
compatible Carel product range.
EVD ice controls refrigerant superheat and optimises refrigerant circuit
efficiency. It allows considerable 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.
The device also has a user interface that displays the instant superheat
value at all times, signals any alarms, and above all can be used to set the
operating parameters.
When installing the controller, only three initial parameters are required
to start controlling the valve in the system:
- type of refrigerant
- operating mode (cold room, showcase, etc.)
- superheat set point.
EVD ice can easily be accessed via an RS485 serial connection (Modbus
protocol), for supervision of operating parameters and alarms in real time.
The serial connection can also be used to set the operating parameters
over a remote connection; in this case, combination with other Carel
controllers is recommended (supervisors and cold room controllers).
1.1 Models
P/N
Description
EVDM011R3*
EVD ice 115/230 V, E2V stator, display
EVDM011R1*
EVD ice 115/230 V, E2V stator, display, Ultracap module
connector
EVDM011R4*
EVD ice 115/230 V, E3V stator, display
EVDM011R2*
EVD ice 115/230 V, E3V stator, display, Ultracap module
connector
(*): 0/1=single/multiple package (10 pcs)
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/IP67;
•
operating conditions: -30T40C° (-22T104°F);
•
compatible with Carel E2V and E3V single-pole valves.
From the software revision 1.7 the Smooth lines function has been
introduced.
1.3 Accessories
Ratiometric pressure probe P/N SPKT0013P0 (-1 to 9.3 bars)
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.
Fig. 1.a
P/N
Type
Photo nr.
SPKT0053P0
-1…4.2 barg
1
SPKT0013P0
-1…9.3 barg
SPKT0043P0
0…17.3 barg
SPKT0033P0
0…34.5 barg
SPKT00B6P0
0…45 barg
SPKT00E3P0
-1…12.8 barg
SPKT00F3P0
0…20.7 barg
SPKT00G1S0
0…60 barg
2
SPKT00L1S0
0…90 barg
Tab. 1.b
Unipolar valve body
The valve body, to be purchased separately, is assembled using the stator
supplied with EVD ice. For the part numbers, see the CAREL product
catalogue.
Fig. 1.b
Ultracap module (P/N EVDMU**R**)
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
1
2