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7
ENG
ir0300028EN rel. 1.1 - 05.05.2017
1. INTRODUCTION
The ir33+ platform for refrigeration applications comprises a series of
microprocessor-based parametric electronic controllers, with LED display,
designed to control stand-alone refrigeration units. Three ranges are
available:
•
ir33+;
•
ir33+ wide and ir33+ small wide;
•
easy wide and easy small wide.
which share the same software and diff er in terms of shape, user interface
and the number of outputs. These controllers are especially suitable for
applications requiring high load switching power, functions and control
with direct access from the keypad, high IP ingress protection and
compact dimensions. In terms of reliability, all the controllers are fi tted
with an electronic device (watchdog) that prevents the microprocessor
from losing control, even with high levels of electromagnetic disturbance.
The ir33+ platform is made using the most advanced SMD technology,
and electrical testing of all the components fi tted guarantees high quality
standards.
In summary:
•
up to 5 relay outputs on the more complete models: compressor, fan,
defrost, AUX1, AUX2;
•
panel installation (front panel as standard) or rear panel with separate
fl exible keypad (can be customised);
•
simple installation with two plastic fastening brackets (ir33+, ir33+
wide, ir33+ small wide) or with screws from the front (easy wide, easy
small wide);
•
buttons fl ush with the front panel, to ensure high ingress protection
(IP65) and safety during operation and cleaning;
•
bright 3 digit display, with decimal point and icons to denote operating
status;
•
immunity to brief power interruptions: if the controller detects that
voltage drops below a certain threshold, the display is temporarily
switched off and the controller continues working normally;
•
keypad with 4 (ir33+), 8 (ir33+ wide, ir33+small wide) or 9 buttons
(easy wide, easy small wide);
•
defrosts can be activated from the keypad, digital input, supervisor;
•
management of various types of defrost, on one or two evaporators:
natural (stopping the compressor), heater, hot gas;
•
advanced defrost functions;
•
automatic recognition of the network protocol: Carel or Modbus®;
•
parameter selection simplifi ed by diff erent icons according to the
category;
•
temperature control with virtual control probe and set point variation
at night;
•
digital inputs to activate alarms, enable or activate defrosts, door /
curtain switch, auxiliary output, on/off , etc.;
•
control of 1 compressor with two steps, or two compressors, including
rotation;
•
keypad protection: the functions of the individual buttons can be
disabled to prevent unwanted tampering;
•
management of the light in the cabinet/cold room and the curtain on
the cabinet;
•
VPM program (Visual Parameter Manager), running on a personal
computer, used to update the parameters and test the controller;
•
alarm signal buzzer;
•
HACCP functions: temperature monitoring and recording in the event
of high temperature alarms during operation and after blackouts;
•
RS485 serial network connection to remote supervisor and
telemaintenance systems.
The models diff er in terms of:
•
the type of power supply: alternating current (12 V~, 12 to 24 V~, 115
V~, 115/230 V~, 230 V~, 50/60 Hz); direct current (12/18 Vdc, 12/30
Vdc);
•
the number of relay outputs;
•
the type of probes that can be connected: NTC or NTC/PTC;
•
the type of terminals: fi xed screw, plug-in or spade terminals.
Available accessories include:
•
serial interface card (P/N IROPZ48500) for connection to the RS485
network;
•
programming key (P/N IROPZKEY**) for reading (upload) and writing
(download) the control parameters;
•
display interface (P/N IROPZDSP00) for remote display connection.
1.1 Main features
The ir33+ platform controllers are designed to off er maximum installation
fl exibility. In addition to the control probe, a further three probes can be
confi gured, as product probe (display only), condenser, frost protection
and defrost probe. Using the advanced defrost functions, if the conditions
are right, subsequent defrosts can be postponed or skipped. The digital
outputs (relays) can control the solenoid valve or compressor, a second
compressor, the evaporator or condenser fans, defrosts, lights and alarms.
The digital inputs can be used for the door switch and light management,
the curtain switch to change over to night-time operation, to enable
and start defrosts, to switch the controller on/off and to activate of the
auxiliary output. Finally, the controller can also be used as simple ON/OFF
thermostat, for heating applications.
Example: vertical display case and cold room.
Fig. 1.a
Fig. 1.b