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ENGLISH
ir33 +030220441 - rel. 2.0 - 01.05.2006
HACCP
This function, increasingly required in the refrigeration market, is included as standard on all models with clock.
This allows the monitoring of critical points by measuring and recording the temperatures in the event of high
temperature alarms or power failures.
Up to 3 high temperature alarms and 3 alarms corresponding to power failures can be saved.
Light management
The ir33 platform has been enhanced by the introduction of the function for managing the light when
the door opens, set by parameter.
Keypad protection
The keypad and the remote control can be disabled to avoid tampering by unauthorised persons, above
all in the event when the controller is installed in an area open to the public.
Continuous cycle
The “continuous cycle” function ensures the operation of the compressor for the time set by the
corresponding parameter. This function is useful when a rapid reduction in the temperature is required.
Serial connection
The entire range has an RS485 serial port for network connection to supervisor or telemaintenance
systems using a shielded twisted pair cable.
Index of protection
The gasket inside the front panel and the material used to make the keypad guarantee IP65 protection
for the controller on the front panel.
Installation
The controllers are mounted using the screws at the front, or alternatively using two quick-fi t side brac-
kets, with compact dimensions, made from plastic.
In-circuit testing
The ir33 platform controllers are made using the most advanced SMD technology. All the controllers
undergo “IN-CIRCUIT TESTING” to check electrical operation of all components.
NTC probe
The controllers can manage two types of NTC probes (see parameter “/P”): standard version –50T90°C
(NTC0*HP*) or alternatively the model for high temperatures, up to 150°C (enhanced NTC –40T150°C).
Watch dog
This feature prevents the microprocessor from losing control over the unit even in the presence of
considerable electromagnetic disturbance. In the event of abnormal operation, the watchdog function
re-establishes the initial operating status.
Not all the competitors fi t their products with this safety feature.
Electromagnetic compatibility
The ir33 platform is compliant with EU standards on electromagnetic compatibility. The quality and the
safety of the ir33 controllers are ensured by the CAREL ISO 9001 certifi ed design and production system
and by the CE mark on the product.
Network functions
The controllers feature management of multiplexed defrosts, remote alarm signals and the downloading
of the parameters via the local network.
Parameter selection
Selection of the parameters on the display simplifi ed by the use of icons or with the standard Carel
procedure.
Confi guration of the digital inputs
The digital inputs can be confi gured and used as NTC probe inputs, by simply setting a parameter.
Connectors
Models fi tted with spade connectors or fi xed screw terminals.
Options
• programming key;
• RS485 serial interface can be added at any time;
• optional repeater display for models with switching power supply.
For further information, see the chapter on “Accessories”.
Number of relays
Number of relays Compressor Light
ir33 from 1 to 4 8A and 16 A
ir33power from 1 to 4 2Hp
ir33DIN from 1 to 5 16 A and 2Hp
powercompact from 2 to 5 8A, 16 A and 2Hp
powercompact small from 2 to 4 2Hp
masterCella from 3 to 5 30 A 70A (2Hp)
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