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EVCO S.p.A. • Code 104X225E104 • page 1/5

EVX225

Digital controllers for double room refrigerated cabinets

version 1.0

Hereafter, with the word “switch on” means the passage from stand-
by status to on status; the word “switch off” means the passage from on
status to stand-by status.
When the power is switched back on, the instrument displays the
status that it was in at the time it was disconnected.

4.2

Switching on/off of the instrument (switching on/
off room 1 and room 2)

• make sure that the keyboard is not locked and that no other opera-

tion is in progress

• press and hold down the

ON/STAND-BY

key for 1 s: the

on/stand-by LED will switch off/on.

4.3

Switching on/off room 1/room 2

To switch on/off room 1 operate as follows:
• make sure that the keyboard is not locked and that no other opera-

tion is in progress

• press and hold the

and

ON/STAND-BY

key for 1 s: the display

will show 3 s “

On1

” or “

OFF1

”.

To switch on/off room 2 operate as follows:
• make sure that the keyboard is not locked and that no other opera-

tion is in progress

• press and hold the

DOWN

and

ON/STAND-BY

key for 1 s: the

display will show 3 s “

On2

” or “

OFF2

”.

4.4

The display

If the instrument is switched on, during normal operation, the display
will show the temperature established with parameter P5:
• if P5 = 0, the display will show the room 1 temperature

EN ENGLISH

IMPORTANT

1.1

Important

Carefully read these instructions before installing and using the product. Pay close attention to the notes on installation and electrical wiring
connections; save these instructions together with the instrument for future reference.

The instrument must be disposed of in accordance with local laws on the collection of electrical and electronic equipment.

DIMENSIONS AND INSTALLATION

3.1

Dimensions

The dimensions are expressed in mm (in).

• if P5 = 1, the display will show the room 2 temperature
except during defrosting, when the instrument will show the tem-
perature established with parameter d6.
If the instrument is switched off, the display will be switched off.

4.5

Room 1 temperature display

• make sure that the keyboard is not locked and that no other opera-

tion is in progress

• press down the

DOWN

key for 1 sec: the display will show the first

label available

• press and release the

key or the

DOWN

key to select “

Pb1

”

• press and release the

SET

key.

To exit the procedure:
• press and release the

SET

key and then do not operate for 60 sec

• press and release the

DOWN

key until the display shows the

room 1 temperature and then do not operate for 60 sec.

Alternatively:
• press and release the

ON/STAND-BY

key.

4.6

Room 2 temperature display

• make sure that the keyboard is not locked and that no other opera-

tion is in progress

• press down the

DOWN

key for 1 sec: the display will show the first

label available

• press and release the

key or the

DOWN

key to select “

Pb2

”

• press and release the

SET

key.

To exit the procedure:
• press and release the

SET

key and then do not operate for 60 sec

• press and release the

DOWN

key until the display shows the

room 1 temperature and then do not operate for 60 sec.

Alternatively:
• press and release the

ON/STAND-BY

key.

4.7

Condenser temperature display

• make sure that the keyboard is not locked and that no other opera-

tion is in progress

• press down the

DOWN

key for 1 sec: the display will show the first

label available

• press and release the

key or the

DOWN

key to select “

Pb3

”

• press and release the

SET

key.

To exit the procedure:
• press and release the

SET

key and then do not operate for 60 sec

• press and release the

DOWN

key until the display shows the

room 1 temperature and then do not operate for 60 sec.

Alternatively:
• press and release the

ON/STAND-BY

key.

If the condenser probe is absent (parameter P4 = 0), the label “

Pb3

”

will not be displayed.

4.8

Manual activation of defrosting

• make sure that the keyboard is not locked and that no other opera-

tion is in progress

• press and hold down the

DEFROST

key for 4 sec.

4.9

Switching on/off of the cabinet light (provided that
parameter u11 is set to 0)

• make sure that no other procedure is in progress
• press and release the

AUXILIARY

key: the LED light will switch

on/off.

See also parameter u2.

4.12 Locking/unlocking the keyboard

To lock the keyboard:
• make sure that no other procedure is in progress
• press and hold down the

SET

and

ON/STAND-BY

keys for 1 sec:

the display will show the message “

Loc

” for 1 sec.

If the keyboard is locked, the following are not permitted:
• switch on/off of the instrument
• switch on/off room 1
• display of the room 1 temperature (via the procedure indicated in

paragraph 4.5)

• display of the room 2 temperature (via the procedure indicated in

paragraph 4.6)

• display of the condenser temperature (via the procedure indicated

in paragraph 4.7)

• manual activation of defrosting
• manual switch on/off of the auxiliary output
• changing the working setpoints (with the procedures described in

5.1 and 5.2)

• display of compressor operation hours
• cancellation of compressor operation hours
The operations cause the display of the label “

Loc

” per 1 sec.

INTRODUCTION

2.1

Introduction

EVX225 is a digital controller for the operation of double room refrig-
erated cabinets.
The controller is equipped with:
• 3 measure inputs (room 1 probe, room 2 probe and condenser

probe) for NTC probes

• 2 digital inputs (high pressure switch and low pressure switch)
• 5 digital outputs (relays) for operation of the compressor

(30 A @ 250 VAC), the room 1 valve, the room 2 valve, the evapora-
tor fan and a fifth use (which can be set as cabinet light, demister
heater, auxiliary output, alarm output or condenser fan); defrosting
occours stopping the compressor, has effect on both the rooms and
at the same time.

The model looks in open frame board; the user interface consists of a
4 digit custom display (with decimal point and functional icons) and
by six buttons (SET, UP, DOWN, DEFROST, AUXILIARY and
ON/STAND-BY).
Installation is by back panel, using M3 studs.
Using the EVKEY programming key (to be ordered separately) it is
possible to carry out the uploading and downloading of the configu-
ration parameters; it is also possible to connect the controller to the set-
up software system Parameters Manager and to the supervision system
RICS (through a serial interface, via TTL, with MODBUS communica-
tions protocol).

3.2

Installation

Back panel installation using M3 studs.

3.3

Installation notes

• make sure that the working conditions (operating tempera-

ture, humidity, etc.) fall within the limits inidcated in the tech-
nical specifications

• do not install the device near heat sources (heaters, hot air

ducts, ect.), near devices with strong magneti (large diffusors
etc.) and places subject to direct sunlight, rain, humidity,
excessive dust, mechanical vibrations or shaking

• in accordance with laws on safety, protection against possi-

ble contact with electrical parts must be ensured via the cor-
rect installation of the instrument; all the parts that ensure
such protection must be secured in such a way that they
cannot be removed without the using a special tool.

USER INTERFACE

4.1

Preliminary signals

The user interface consists of a custom 4 digit display (with decimal
point and function icons) and six keys (SET, UP, DOWN, DEFROST,
AUXILIARY and ON/STAND-BY).

Operating statuses:
• “on” status (the instrument is powered and on: the regulators can be

switched on)

• “stand-by” status (the instrument is powered but is switched off via

software: the regulators are switched off; the possibility to manually
switch on/switch off the cabinet light or auxiliary output depends
on parameter u2)

• “off” status (the instrument is not powered).