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);
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.
the port must
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”).
Evco S.p.A. • Code 104K404E114 • page 2/8
4.2.5 Operation in cooling or heating mode from
digital input 1 (CFG parameter = 4)
CODE MEANING
SP1 work set-point with heating mode operation
SP2 work set-point with cooling mode operation
r0 work set-point differential with heating mode
operation (SP1)
r6 work set-point differential with cooling mode
operation (SP2)
If the digital input 1 is not active, the device will operate with heating
mode (see paragraph 4.2.2); the set-point associated with the regula-
tion will be SP1.
If the digital input 1 is active, the device will operate with cooling
mode (see paragraph 4.2.1); the set-point associated with the regula-
tion will be SP2.
4.2.6 Operation in cooling mode with Energy Saving
function from digital input 1 (CFG parameter = 5)
CODE MEANING
SP1 work set-point with digital input 1 not active
SP2 work set-point with digital input 1 active
r0 work set-point differential with digital input 1 not
active (SP1)
r6 work set-point differential with digital input 1
active (SP2)
The device will operate with cooling mode operation (see
paragraph 4.2.1).
If digital input 1 is not active, the set-point associated to the regulation
will be SP1; if the digital input 1 is active, the set-point associated to the
regulation will be SP2.
4.2.7 Operation in heating mode with Energy Saving
function from digital input 1 (CFG parameter = 6)
CODE MEANING
SP1 work set-point with digital input 1 not active
SP2 work set-point with digital input 1 active
r0 work set-point differential with digital input 1 not
active (SP1)
r6 work set-point differential with digital input 1
active (SP2)
The device will operate with heating mode (see paragraph 4.2.2).
If digital input 1 is not active, the set-point associated to the regulation
will be SP1; if the digital input 1 is active, the set-point associated to the
regulation will be SP2.
4.2.8 Operation for cooling and heating mode
with two independent work set-points
(CFG parameter = 7)
CODE MEANING
SP1 work set-point with heating mode operation
SP2 work set-point with cooling mode operation
r0 work set-point differential with heating mode
operation (SP1)
r6 work set-point differential with cooling mode
operation (SP2)
If the magnitude exceeds SP1, the relays K1 and K2 will remain off.
If the magnitude is within r0, the relays K1 and K2 will be on (and off)
in succession; switch-ons (and switch-offs) will be distributed propor-
tionally to the number of relays used for the regulation (two).
If the magnitude is below “SP1 - r0”, the relays K1 and K2 will
remain on.
If the magnitude exceeds SP2, the relays K3 and K4 will remain off.
If the magnitude is within r6, the relays K3 and K4 will be on (and off)
in succession; switch-ons (and switch-offs) will be distributed propor-
tionally to the number of relays used for the regulation (two).
If the magnitude exceeds “SP2 + r6”, the relays K3 and K4 will
remain on.
4.2.9 Operation with two independent neutral areas
(parameter CFG =8)
CODE MEANING
SP1 work set-point SP1 (the magnitude associated to the ad-
justment is that detected by probe 1)
r0 differential (of the work set-point SP1) of the relay with
cooling mode operation (relay K2)
r6 differential (of the work set-point SP1) of the relay with
heating mode operation (relay K1)
r1 1 neutral area value (of the work set-point SP1)
SP2 work set-point SP2 (the magnitude associated to the ad-
justment is that detected by probe 2)
r1 2 differential (of the work set-point SP2) of the direct opera-
tion relay (for example, to dehumidify; relay K4)
r1 3 differential (of the work set-point SP2) of the heating mode
operation relay (for example, to humidify; relay K3)
r1 4 neutral area value (of the work set-point SP2)
If the magnitude detected by probe 1 is within r11, the K1 and K2
relays will remain off.
If the magnitude detected by probe 1 drops below “SP1 - r11 - r6”,
relay K1 will be switched on (it will be switched off over “SP1 - r11”).
If the magnitude detected by probe 1 rises above “SP1 + r11 + r0”,
relay K2 will be switched on (it will be switched off below “SP1 + r11”).
If the magnitude detected by probe 2 is within r14, the K3 and K4
relays will remain off.
If the magnitude detected by probe 2 drops below “SP2 - r14 - r13”,
relay K3 will be switched on (it will be switched off over “SP2 - r14”).
If the magnitude detected by probe 2 rises above “SP2 + r14 + r12”,
relay K4 will be switched on (it will be switched off below “SP2 + r14”).
4.2.10 Operation in cooling or heating mode from probe
2 (CFG parameter = 9)
CODE MEANING
SP1 work set-point with heating mode operation
SP2 work set-point with cooling mode operation
r0 work set-point differential with heating mode
operation (SP1)
r6 work set-point differential with cooling mode
operation (SP2)
r1 7 magnitude value detected by probe 2 below which the
heating mode operation is enabled
r1 8 magnitude value detected by probe 2 over which the
cooling mode operation is enabled
The device will operate with cooling or heating mode (see
paragraph 4.2.8).
For the cooling mode operation (or heating mode) to be enabled, the
magnitude detected by probe 2 must have remained in continuous
mode above that established with parameter r18 (or below that
established below r17) for the time established with parameter r21.
4.3 Soft switch-on function
The Soft switch-on allows to increase (heating mode operation) or
decrease (cooling mode operation) the work set-points gradually
on device switch-on.
On expiry of the time established with parameter r15, the set-points are
increased or decreased by one unit (temporary set-points) starting
from the value of the magnitude to device switch-on until reaching
the values set, if and when the function is concluded.
In the example:
• the operation is for heating mode
• the magnitude value on device switch-on is 16
• the work set-point SP1 is set at 20.
4.4 Device operation in the presence of probe 2
In the presence of probe 2, device operation depends mainly on
parameter P9.
No probe (parameter P9 = 0)
Factory settings.
Differential operation (parameter P9 = 1); only if CFG = 0, 1, 2 or 3
The magnitude associated to the regulation will be "magnitude de-
tected by probe 1 - magnitude detected by probe 2".
Evco S.p.A. • Code 104K404E114 • page 3/8
Operation with summer compensation of the work set-point SP1 (pa-
rameter P9 = 2); only is CFG = 0, 1, 2 or 3
Example 1: parameter r16 is set at a positive value.
5 USER INTERFACE
5.1 Foreword
The user interface is composed of a custom 4 digit display (with deci-
mal point and function icons) and by 4 keys (SET, UP, DOWN and
ON/STAND-BY).
Example 1: parameter r16 is set at a positive value.
Example 2: parameter r16 is set at a negative value.
CODE MEANING
SP1 work set-point SP1
r1 6 maximum value of the summer compensation of the work
set-point SP1
r17 value of the magnitude detected by probe 2 over
which summer compensation of the work set-point SP1
is started
r18 value of the magnitude detected by probe 2 over
which summer compensation of the work set-point SP1
is concluded
The value of the work set-point SP 1 is however subject to the values
established with parameters r1 and r2.
Operation with winter compensation of the work set-point SP1
(parameter P9 = 3); only is CFG = 0, 1, 2 or 3
Example 1: parameter r16 is set at a positive value.
Example 2: parameter r16 is set at a negative value.
CODE MEANING
SP1 work set-point SP1
r1 6 maximum value of the winter compensation of the work
set-point SP1
r19 value of the magnitude detected by probe 2 below
which summer compensation of the work set-point SP1
is concluded
r20 value of the magnitude detected by probe 2 below
which winter compensation of the work set-point SP1
is started
The value of the work set-point SP 1 is however subject to the values
established with parameters r1 and r2.
Operation with combined compensation of the work set-point SP1
(parameter P9 = 4); only is CFG = 0, 1, 2 or 3
Example 2: parameter r16 is set at a negative value.
CODE MEANING
SP1 work set-point SP1
SP2 work set-point SP2
r6 neutral area value with combined compensation opera-
tion of the work set-point SP1
r1 8 value of the magnitude detected by probe 2 over which
combined compensation of the work set-point SP1 is
concluded (relative to “SP2 + r6”)
r1 9 value of the magnitude detected by probe 2 below which
combined compensation of the work set-point SP1 is
concluded (relative to “SP2 - r6”)
The value of the work set-point SP 1 is however subject to the values
established with parameters r1 and r2.
4.5 Work program function
The Work Program function allows to reach and maintain five
magnitudes (with different values) during five respective time intervals
(hereon called phases).
On conclusion of a phase, the device passes automatically to the next
one; on conclusion of the fifth phase the device restores normal op-
eration and the function is concluded.
If the magnitude has not reached the respective value at the conclu-
sion of a phase, the device will still pass to the next phase.
If the duration of the first ... fourth phase is set at a nil value, on reaching
the respective value, the device will pass to the next phase. If the dura-
tion of the fifth phase is set at a nil value, the phase will continue until
the function is interrupted in manual mode.
If a power cut occurs during operation, this will be concluded.
To activate/deactivate the function:
The activation/deactivation mode of the function depends on
parameter r23:
• if parameter r23 is set at 0, the function will be absent
• if parameter r2 is set at 1, the
key must be pressed for 4 s, on
condition that the keyboard is not blocked
• if parameter r23 is set at 2, it will be necessary to activate the digital
input 1 (or digital input 2), on condition that the parameter i0 (or the
parameter i5) is set at 4.
When the function is interrupted, the display will show the “StOP”
indication flashing for 4 s.
During the function:
During the function, the display shows the “Ph” indication followed
by the number of the phase (for example “Ph2”) for ½ s every 4 s.
On conclusion of the function:
On conclusion of the function, the display shows the “EndP”
indication flashing ½ s every 4 s; press a key to delete the “EndP”
indication.
CODE MEANING
r2 4 duration of the first phase of the work program
r25 magnitude detected by probe 1 to be reached and
maintained during the first phase of the work program
r2 7 duration of the second phase of the work program
r2 8 magnitude detected by probe 1 to be reached and main-
tained during the second phase of the work program
r3 0 duration of the third phase of the work program
r31 magnitude detected by probe 1 to be reached and
maintained during the third phase of the work program
r3 3 duration of the fourth phase of the work program
r34 magnitude detected by probe 1 to be reached and
maintained during the fourth phase of the work program
r3 6 duration of the fifth phase of the work program
r37 magnitude detected by probe 1 to be reached and
maintained during the fifth phase of the work program
If CFG parameter is set at 8, the function will allow to reach and
maintain five magnitudes detected by probe 1 and five magnitudes
detected by probe 2.
The following operating states exist:
• “on” state (the device is powered and is
on: the relays can be
switched on)
• the “stand-by” state (the device is powered but is
off via software: the
relays are off)
• the “off” state (the device is not powered).
Hereon, the term "switch on" means the passage from the stand-by
state to the on state. The term "switch off" means passage from the on
state to the stand-by state.
When powered, the device will be in the same state as when the power
supply was cut-off.
5.2 Device switch-on/off in manual mode
• make sure that the keyboard is not blocked and that no procedure
is in progress
• make sure that the device has not switched off in remote mode (pa-
rameter i0 = 3 and digital input 1 active and/or parameter i5 = 3 and
digital input 2 active)
• press
for 1 s: the on/stand-by LED will switch off/on.
Using the digital inputs 1 and 2 it is also possible to switch the device
on/off in remote mode.
5.3 The display
If the device is on, during normal operation the display will show the
magnitude established with parameter P5:
• if P5 = 0, the display will show the magnitude detected by probe 1
• if P5 = 1, the display will show the magnitude detected by probe 2.
If the device is off (stand-by state), the display will be off.
5.4 Display of the magnitude detected by probe 1
and the magnitude detected by probe 2
• make sure that the keyboard is not blocked and that no procedure
is in progress
• press
• press
for 1 s: the display will show the first label available
or to select “Pb1” or “Pb2”
• press
To exit the procedure:
• press
• press
or do not operate for 60 s
or until the display shows the magnitude established
with parameter P5 or do not operate for 60 s.
Alternatively:
• press
If probe 2 is absent (parameter P9 = 0 or parameter CFG = 4, 5, 6 or
7), the “Pb2” label will not be displayed.
5.5 Display of the state of the digital input 1 and
the state of the digital input 2
• make sure that the keyboard is not blocked and that no procedure
is in progress
• press
• press
• press
for 1 s: the display will show the first label available
or to select “id1” or “id2”
: the display will show “on” (active input) or “oFF”
(non-active input).
To exit the procedure:
• press
• press
or do not operate for 60 s
or until the display shows the magnitude established
with parameter P5 or do not operate for 60 s.
Alternatively:
• press
If the activation of the digital input 1 does not have any effect
(parameter i0 = 0), the “id1” label will not be displayed.
If the activation of the digital input 2 does not have any effect
(parameter i5 = 0), the “id2” label will not be displayed.
5.6 Learning the type of operation in progress
• make sure that the keyboard is not blocked and that no procedure
is in progress
• press
• press
for 1 s: the display will show the first label available
or to select “CFG”
• press
To exit the procedure:
• press
• press
or do not operate for 60 s
or until the display shows the magnitude established
with parameter P5 or do not operate for 60 s.
Alternatively:
• press
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