Evco S.p.A. • Code 104K404E114 • page 1/8
EVK404 Four outputs universal digital controller version 1.1
I ENGLISH
MAIN INDEX
1 IMPORTANT ........................................................ page 1
2 DIMENSIONS AND INSTALLATION ..................... page 1
3 ELECTRIC CONNECTION ..................................... page 1
4 OPERATION ........................................................ page 1
5 USER INTERFACE ................................................. page 3
6 SETTINGS ........................................................... page 4
7 STORING ALARMS AND ERRORS .......................... page 4
8 SIGNALS AND INDICATIONS .............................. page 4
9 ALARMS .............................................................. page 4
1 0 ERRORS ............................................................... page 5
11 TECHNICAL DATA ............................................... page 5
12 WORK SET-POINT AND CONFIGURATION
PARAMETERS ....................................................... page 5
1 IMPORTANT
1.1 Important
Please read these instructions carefully prior to installation and use
and follow the precautions for installation and electric connection;
keep these instructions with the device for future consultation.
The device must be disposed of in compliance with local
Standards regarding the collection of electric and electronic
equipment.
2 DIMENSIONS AND INSTALLATION
2.1 Dimensions
The dimensions are expressed in mm (in).
DIMENS. MINIMUM TYPICAL MAXIMUM
A 71.0 (2.795) 71.0 (2.795) 71.8 (2.826)
B 29.0 (1.141) 29.0 (1.141) 29.8 (1.173)
2.2 Installation
Per panel using the snap-on brackets supplied.
2.3 Installation warnings
• the thickness of the panel must not exceed 8.0 mm (0.314 in)
• make sure that the work conditions (temperature of use, humidity,
etc.) lie within the limits indicated in the technical data.
• do not install the device near to any heat sources (heating elements,
hot air ducts etc.), equipment containing powerful magnets (large
diffusers, etc), areas affected by direct sunlight, rain, humidity, exces-
sive dust, mechanical vibrations or shocks.
• in compliance with Safety Standards, the device must be installed
correctly and in a way to protect against any contact with electric
parts; all parts that ensure protection must be fixed in a way that they
cannot be removed without the use of tools.
3 ELECTRIC CONNECTION
3.1 Foreword
With reference to the wiring diagram:
• port 1 (on request) is the TTL serial port for communication with the
EVKEY programming key, with the Parameters Manager set-up soft-
ware (via a serial interface, with MODBUS communication protocol)
or for that for monitoring or supervision of RICS plants (via a serial
interface, with MODBUS communication protocol);
the port must
be used for one purpose at a time.
• port 2 (on request) is the port for communication with the EVT100
remote indicator; the indicator displays the magnitude established
with parameter P6.
3.2 Electric connection
3.3 Warnings for the electric connection
• do not use electric or pneumatic screwdrivers on the terminal board
• if the device has been taken from a cold to hot place, the humidity
could condense inside; wait about 1 hour before powering it
• make sure that the power supply voltage, the frequency and the
operational electric power of the device, correspond with those of
the local power supply
• disconnect the power supply before proceeding with any type of
maintenance
• do not use the device as a safety device
• for repairs and information regarding the device, contact the EVCO
sales network.
4 OPERATION
4.1 Foreword
Operation depends mainly on the parameter CFG; paragraphs 4.2.1
... 4.2.10 illustrate operation according to the value of this parameter.
The magnitude associated with the regulation is that detected by probe
1, unless the CFG parameter is set at 8, if and when operation is with
two independent neutral areas.
In the diagrams shown in paragraphs 4.2.1 ... 4.2.10 the switch-on
and switch-off sequence of the relays is fixed; it can be modified via
parameter C13.
Using the Soft switch-on function (see paragraph 4.3) it is also possible to
increase or decrease the work set-point gradually on device switch-on.
Via parameter P9 it is finally possible to subject device operation to the
value of the magnitude detected by probe 2 (see paragraph 4.4).
See paragraph 6.3 to set the configuration parameters.
4.2.1 Cooling mode operation (parameter CFG = 0)
CODE MEANING
SP1 work set-point
r0 work set-point differential
If the magnitude is below SP1, all relays will remain off.
If the magnitude is within r0, the relays will be on (and off) in succes-
sion; switch-ons (and switch-offs) will be distributed proportionally to
the number of relays used for the regulation (four).
If the magnitude exceeds “SP1 + r0”, all relays will remain on.
4.2.2 Heating mode operation (CFG parameter = 1);
factory setting
CODE MEANING
SP1 work set-point
r0 work set-point differential
If the magnitude exceeds SP1, all relays will remain off.
If the magnitude is within r0, the relays will be on (and off) in succes-
sion; switch-ons (and switch-offs) will be distributed proportionally to
the number of relays used for the regulation (four).
If the magnitude is below “SP1 - r0”, all relays will remain on.
4.2.3 Neutral area operation (parameter
CFG = 2)
CODE MEANING
SP1 work set-point
r0 relay differential with cooling mode operation (relays K3
and K4)
r6 relay differential with heating mode operation (relays K1
and K2)
r1 1 neutral area value
If the magnitude is within r11, all relays will remain off.
If the magnitude is within r6, the relays with heating mode operation
will be on (and off) in succession; switch-ons (and switch-offs) will be
distributed proportionally to the number of relays used for the regu-
lation (two).
If the magnitude is below “SP1 - r11 - r6”, the relays with heating mode
operation will remain on.
If the magnitude is within r0, the relays with cooling mode operation
will be on (and off) in succession; switch-ons (and switch-offs) will be
distributed proportionally to the number of relays used for the regu-
lation (two).
If the magnitude exceeds “SP1 + r11 + r0”, the relays with cooling
mode operation will remain on.
4.2.4 Neutral area operation with alarm relay
(CFG parameter = 3)
CODE MEANING
SP1 work set-point
r0 relay differential with cooling mode operation (relay K2)
r6 relay differential with heating mode operation (relay K1)
r1 1 neutral area value
A1 magnitude value below which the minimum alarm is
activated (code “AL”)
A4 magnitude value over which the minimum alarm is acti-
vated (code “AH”)
A1 1 parameters A1 and A4 differential
If the magnitude is within r11, all relays will remain off.
If the magnitude drops below “SP1 - r11 - r6”, the relay with heating
mode operation will be on (it will be off over “SP1 - r11”).
If the magnitude rises above “SP1 + r11 + r0”, the relay with cooling
mode operation will be on (it will be off below “SP1 + r11”).
If the magnitude drops below A1, the minimum alarm signal relay will
be on (it will be off over “A1 + A11”).
If the magnitude rises above A4, the maximum alarm signal relay will
be on (it will be off over “A4 + A11”).
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