EVCO EVK253N7 - Manual

Evco S.p.A. • Code 104K203E07
EVK203/EVK213/EVK223/EVK233/EVK253
Digital thermostats for ventilated refrigerating units version 1.07
GB ENGLISH
1 GETTING STARTED
1.1 Important
Read these instructions carefully before installing and using the instru-
ment and follow all additional information for installation and electrical
connection; keep these instructions close to the instrument for future
consultations.
1.2 Installing the instrument
Panel mounting, with click brackets (supplied by the builder); dimen-
sions 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)
Additional information for installation:
• 59.0 (2.322) is the maximum depth with screw terminal blocks
• 83.0 (3.267) is the maximum depth with extractable terminal blocks
• the panel thickness must not be higher than 8.0 mm (0.314 in)
• working conditions (working temperature, humidity, etc.) must be be-
tween the limits indicated in the technical data
• do not install the instrument close to heating sources (heaters, hot air
ducts, etc.), devices provided with big magnetos (big speakers, etc.),
locations subject to direct sunlight, rain, humidity, dust, mechanical
vibrations or bumps
• according to the safety legislation, the protection against electrical
parts must be ensured by a correct installation of the instrument; the
parts that ensure the protection must be installed so that you can not
remove them if not by using a tool.
1.3 Wiring diagram
With reference to the wiring diagrams:
• port 1 (by request) is the serial port for the communication with the
supervision system (through a serial interface, via TTL, with MODBUS
communication protocol) or with the programming key; the port must
not be used at the same time for the same purposes
• port 2 (by request, not available in EVK223, EVK233 and EVK253 with
power supply 230 VAC and 115 VAC) is the port for the communica-
tion with the remote indicator; the indicator shows the quantity you
have set with parameter P5.
Additional information for electrical connection:
• do not operate on the terminal blocks with electrical or pneumatic
screwers
• if the instrument has been moved from a cold location to a warm one,
the humidity could condense on the inside; wait about an hour be-
fore supplying it
• test the working power supply voltage, working electrical frequency
and working electrical power of the instrument; they must correspond
with the local power supply
• disconnect the local power supply before servicing the instrument
• do not use the instrument as safety device
• for repairs and information on the instrument please contact Evco
sales network.
2 USER INTERFACE
2.1 Turning on/off the instrument
To turn on the instrument you have to supply it; to turn it off it is enough
to cut off the power supply.
Through the digital input (only EVK213, EVK223 and EVK233) it is also
possible to turn off the instrument at a distance (or turn off the instru-
ment via software; in this case the instrument remains connected to the
power supply and the regulators are turned off).
2.2 The display
If the instrument is turned on, during the normal operation the display
will show the quantity you have set with parameter P5:
• if P5 = 0, the display will show the cabinet temperature
• if P5 = 1, the display will show the working setpoint
• if P5 = 2, the display will show the evaporator temperature
• if P5 = 3, the display will show “cabinet temperature - evaporator tem-
perature”
• if P5 = 4, the display will show the condenser temperature (only
EVK253).
2.3 Showing the cabinet temperature
• make sure the keyboard is not locked and no procedure is running
• press
2 s: the display will show the first available label
• press or to select “Pb1”
• press
To quit the procedure:
• press
or do not operate 60 s
• press or as long as the display shows the quantity you have
set with parameter P5 or do not operate 60 s.
2.4 Showing the evaporator temperature
• make sure the keyboard is not locked and no procedure is running
• press
2 s: the display will show the first available label
• press or to select “Pb2”
• press
To quit the procedure:
• press
or do not operate 60 s
• press or as long as the display shows the quantity you have
set with parameter P5 or do not operate 60 s.
If the evaporator probe is not enabled (parameter P3 = 0), the label
“Pb2” will not be shown.
2.5 Showing the condenser temperature (only EVK253)
• make sure the keyboard is not locked and no procedure is running
• press
2 s: the display will show the first available label
• press or to select “Pb3”
• press
To quit the procedure:
• press
or do not operate 60 s
• press or as long as the display shows the quantity you have
set with parameter P5 or do not operate 60 s.
If the condenser probe is not enabled (parameter P4 = 0), the label
“Pb3” will not be shown.
2.6 Activating the defrost by hand
• make sure the keyboard is not locked and no procedure is running
• press
4 s.
If the function of the evaporator probe is the one of defrost probe (pa-
rameter P3 = 1) and to the defrost activation the evaporator tempera-
ture is above the one you have set with parameter d2, the defrost will
not be activated.
2.7 Locking/unlocking the keyboard
To lock the keyboard:
• make sure no procedure is running
• press
and 2 s: the display will show “Loc” 1 s.
If the keyboard is locked, you will not be allowed to:
• show the evaporator temperature
• show the condenser temperature (only EVK253)
• activate the defrost by hand
• modify the working setpoint with the procedure related in paragraph
3.1 (you also can modify the working setpoint through parameter SP).
These operations provoke the visualization of the label “Loc” 1 s.
To unlock the keyboard:
• press
and 2 s: the display will show “UnL” 1 s.
2.8 Silencing the buzzer
• make sure no procedure is running
• press a button (the first pressure of the button does not provoke its
usual effect).
3 SETTINGS
3.1 Setting the working setpoint
• make sure the keyboard is not locked and no procedure is running
• press
LED will flash
• press or in 15 s; also look at parameters r1, r2 and r3
• press or do not operate 15 s.
You also can modify the working setpoint through parameter SP.
3.2 Setting configuration parameters
To gain access the procedure:
• make sure no procedure is running
• press
and 4 s: the display will show “PA”
• press
• press
or in 15 s to set “-19”
• press or do not operate 15 s
• press and 4 s: the display will show “SP”.
To select a parameter:
• press
or
To modify a parameter:
• press
• press
or in 15
• press or do not operate 15 s.
To quit the procedure:
• press
and 4 s or do not operate 60 s.
Switch off/on the power supply of the instrument after the
modification of the parameters.
3.3 Restoring the default value of configuration parameters
• make sure no procedure is running
• press
and 4 s: the display will show “PA”
• press
• press
or in 15 s to set “743”
• press or do not operate 15 s
• press and 4 s: the display will show “dEF”
• press
• press
or in 15 s to set “149”
• press or do not operate 15 s: the display will show “dEF” flash-
ing 4 s, after which the instrument will quit the procedure
• switch off/on the power supply of the instrument.
Make sure the default value of the parameters is appropri-
ate, in particular if the probes are PTC probes.
4
SIGNALS
4.1 Signals
LED MEANING
LED compressor
if it is lit, the compressor will be turned on
if it flashes:
• the modification of the working setpoint will be running
• a compressor protection will be running (parameters C0,
C1, C2 and i7)
LED defrost
if it is lit, the defrost will be running
if it flashes:
• the defrost will be required but a compressor protection
will be running (parameters C0, C1 and C2)
• the dripping will be running (parameter d7)
• the heating of the freezing fluid will be running (param-
eter dA)
LED evaporator fan
if it is lit, the evaporator fan will be turned on
if it flashes, the after dripping evaporator fan delay will be
running (parameter F3)
LED alarm
if it is lit, an alarm will be running
° C LED Celsius degree
if it is lit, the unit of measure of the temperatures will be
Celsius degree (parameter P2)
° F LED Fahrenheit degree
if it is lit, the unit of measure of the temperatures will be
Fahrenheit degree (parameter P2)
CODE MEANING
Loc the keyboard and/or the working setpoint are locked (pa-
rameter r3); also look at paragraph 2.7
- - - - the quantity to show is not available (for example because
the probe is not enabled)
5 ALARMS
5.1 Alarms
CODE MEANING
AL Lower temperature alarm
Remedies:
• check the temperature joined to the alarm
• look at parameters A0, A1 and A2
Effects:
• no effect
AH Upper temperature alarm
Remedies:
• check the temperature joined to the alarm
• look at parameters A3, A4 and A5
Effects:
• no effect
id Door switch input alarm (only EVK213, EVK223 and EVK233
and if parameter i0 has value 2 or 3)
Remedies:
• check the reasons that have provoked the activation of
the input
• look at parameters i0 and i1
Effects:
• the effect you have set with parameter i0
iA Multipurpose input alarm (only EVK213, EVK223 and EVK233
and if parameter i0 has value 0)
Remedies:
• check the reasons that have provoked the activation of
the input
• look at parameters i1 and i5
Effects:
• if parameter i5 has value 3, there will be no effect
• if parameter i5 has value 4, the compressor will be turned
off
iSd Instrument locked alarm (only EVK213, EVK223 and EVK233
and if parameter i0 has value 0)
Remedies:
• check the reasons that have provoked the activation of
the multipurpose input
• switch off/on the power supply of the instrument
• look at parameters i1, i5, i7, i8 and i9
Effects:
• the regulators will be turned off
COH Overheated condenser alarm (only EVK253)
Remedies:
• check the condenser temperature
• look at parameter C6
Effects:
• no effect
CSd Compressor locked alarm (only EVK253)
Remedies:
• check the condenser temperature
• cut off the power supply of the instrument and clean the
condenser
• look at parameter C7
Effects:
• the compressor and the evaporator fan will be turned off
When the cause that has provoked the alarm disappears, the instru-
ment restores the normal operation, except for the instrument locked
alarm (code “iSd”) and the compressor locked alarm (code “CSd”) that
need you switch off/on the power supply of the instrument.
6
INTERNAL DIAGNOSTICS
6.1 Internal diagnostics
CODE MEANING
Pr1 Cabinet probe error
Remedies:
• look at parameter P0
• check the integrity of the probe
• check the connection instrument-probe
• check the cabinet temperature
Effects:
• the compressor activity will depend on parameters C4 and
C5
Pr2 Evaporator probe error
Remedies:
• the same you saw in the previous case but related to the
evaporator probe
Effects:
• if parameter P3 has value 1, the defrost will last the time
you will have set with parameter d3
• if parameter P3 has value 1 and parameter d8 has value 2,
the instrument will work as if parameter d8 had value 0
• if parameter F0 has value 3 or 4, the instrument will work
as if the parameter had value 2
Pr3 Condenser probe error (only EVK253)
Remedies:
• the same you saw in the previous case but related to the
condenser probe
Effects:
• the overheated condenser alarm (code “COH”) and the
compressor locked alarm (code “CSd”) will never be acti-
vated
When the cause that has provoked the alarm disappears, the instru-
ment restores the normal operation.
7
TECHNICAL DATA
7.1 Technical data
Box: self-extinguishing grey.
Frontal protection: IP 65.
Connections (use copper conductors only): screw terminal blocks
(power supply, inputs and outputs), 6 poles connector (serial port; by
request), 4 poles connector (to the remote indicator; by request, not
available in EVK223, EVK233 and EVK253 with power supply 230 VAC
and 115 VAC); extractable terminal blocks (power supply, inputs and
outputs) by request.
Working temperature: from 0 to 55 °C (32 to 131 °F, 10 ... 90% of
relative humidity without condensate).
Power supply EVK203 and EVK253: 230 VAC, 50/60 Hz,
3 VA (approximate); 115 VAC or 12-24 VAC/DC or 12 VAC/DC by re-
quest.
Power supply EVK213: 12 VAC/DC, 50/60 Hz, 3 VA (approximate);
12-24 VAC/DC by request.
Power supply EVK223 and EVK233: 230 VAC, 50/60 Hz, 3 VA
(approximate); 115 VAC by request.
Insulation class: 2.
Alarm buzzer: by request.
Measure inputs EVK203, EVK213, EVK223 and EVK233: 2
(cabinet probe and evaporator probe) for PTC/NTC probes.
Measure inputs EVK253: 3 (cabinet probe, evaporator probe and
condenser probe) for PTC/NTC probes.
Digital inputs (only EVK213, EVK223 and EVK233): 1 (mul-
tipurpose/door switch) for NO/NC contact (free of voltage, 5 V 1 mA).
Working range: from -50.0 to 150.0 °C (-50 to 300 °F) for PTC probe,
from -40.0 to 105.0 °C (-40 to 220 °F) for NTC probe.
Resolution: 0.1 °C/1 °C/1 °F.
Digital outputs: 3 relays:
• compressor relay: 16 res. A @ 250 VAC, 5 FLA,
30 LRA (NO contact) in EVK203, EVK213 and
EVK253 (this last with power supply 12 VAC/DC
and 12-24 VAC/DC); 30 res. A @ 250 VAC, 12 FLA,
72 LRA (NO contact) in EVK233; 8 res. A @
250 VAC, 2 FLA, 12 LRA otherwise
• defrost relay: 8 res. A @ 250 VAC, 2 FLA,
12 LRA (change-over contact)
• evaporator fan relay: 8 res. A @ 250 VAC,
2 FLA, 12 LRA (NO contact) in EVK203, EVK213
and EVK253 (this last with power supply
12 VAC/DC and 12-24 VAC/DC); 5 res. A @
250 VAC otherwise.
The maximum current allowed on the loads is 10 A.
Serial port: port for the communication with the supervision system
(through a serial interface, via TTL, with MODBUS communication pro-
tocol) or with the programming key; by request.
Further communication ports: port for the communication with
the remote indicator; by request, not available in EVK223, EVK233 and
EVK253 with power supply 230 VAC and 115 VAC.