EVCO EVK261 Digital Thermostat
Important
Read these instructions carefully before installing and using the instrument and follow all additional information for installation and electrical connection; keep these instructions close to the instrument for future consultations. The instrument must be disposed of according to the local legislation about the collection for electrical and electronic equipment.
Installing the instrument
Panel mounting, with click brackets (supplied by the builder); dimensions in mm (in).
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.
Wiring diagram
With reference to the wiring diagrams:
- Terminals 1 and 2 are available only in the models with power supply 230 VAC and 115 VAC; terminals 8 and 9 are available only in the models with power supply 12 VAC/DC and 12-24 VAC/DC
- The function of the second input depends on parameter P4
- 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) is the port for the communication with the remote indicator; the indicator shows the quantity you have set with param-eter P5.
Additional information for electrical connection
- Do not operate on the term. 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 a safety device.
USER INTERFACE
Preliminary information
There is the following operation status.
- status “on” (the instrument is supplied and is turned on: the regulators can be turned on)
- status “stand-by” (the instrument is supplied but it is turned off via software: the regulators are turned off)
- status “off” (the instrument is not supplied). If parameter t0 has value 0, “turning on” means moving from status off to status on; “turning off” means moving from status on to status off. If parameter t0 has value 1, “turning on” means moving from status stand-by to status on; “turning off” means moving from status on to status stand-by. After an interruption of power supply the instrument moves to the sta-tus it was before the interruption.
Turning on/off the instrument if parameter t0 has value 0
To turn on the instrument you have to supply it; to turn it off it is enough to cut off the power supply.
Turning on/off the instrument if parameter t0 has value 1
- Make sure the keyboard is not locked and no procedure is running
- Press set 4 s.
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 temperature read by the auxiliary probe (only if parameter P4 has value 1 or 2).
Showing the cabinet temperature
Showing the temperature read by the auxiliary probe (only if parameter P4 has value 1 or 2)
Activating the defrost by hand
Locking/unlocking the keyboard
Silencing the buzzer
- Make sure no procedure is running
- Press a button (the first pressure of the button does not provoke its usual effect).
SETTINGS
Setting the working setpoint
Setting configuration parameters
Switch off/on the power supply of the instrument after the modification of the parameters.
Restoring the default value of configuration parameters
Make sure the default value of the parameters is appropriate.
COMPRESSOR OR INSTRUMENT WORKING DAYS COUNTING
Preliminary information
The instrument can store up to 1,999 compressor or instrument working days, after which the number 1,999 flashes. If parameter t1 has value 0, the instrument will store the compressor working days; if parameter t1 has value 1, the instrument will count its working days (also when it is turned off via software). When the number of working days gets the one you have set with parameter t2, the display shows the label “SEr” flashing. To freeze the signal “SEr” 1 h. press a button (the first pressure of the button does not provoke its usual effect).
Showing the working days
| INFOR. | MEANING |
| dd | the display is about to show the working days |
| 26 | the working days are 26 (to be continued …) |
| hh | the display is about to show the working hours |
| 03 |
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 |
|
| 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 |
| CODE | MEANING |
| SEr | service of compressor or of instrument is requested (param-
eter t2); also look at chapter 4 |
| Loc | the keyboard and/or the working setpoint are locked (pa-
rameter r3); also look at paragraph 2.8 |
| – – – – |
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 if parameter P4 has value 3 and parameter i0 has value 3)
Remedies: •check the reasons that have provoked the activation of the input • look at parameters i0 and i1 Effects: •the compressor will be turned off |
| iA | Multipurpose input alarm (only if parameter P4 has value 3 and 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 if parameter P4 has value 3 and 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 if parameter P4 has value 2)
Remedies: •check the condenser temperature • look at parameter C6 Effects: •no effect |
| CSd | Compressor locked alarm (only if parameter P4 has value 2) Remedies:
|
When the cause that has provoked the alarm disappears, the instrument 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.
INTERNAL DIAGNOSTICS
When the cause that has provoked the alarm disappears, the instrument restores the normal operation.
TECHNICAL DATA
Box: self-extinguishing grey.
Frontal protection: IP 65.
Connections: screw terminal blocks (power supply, inputs and out-put), 6 poles connector (serial port; by request), 4 poles connector (to the remote indicator; by request); extractable terminal blocks (power supply, inputs and output) by request.
Working temperature: from 0 to 55 °C (32 to 131 °F, 10 … 90% of relative humidity without condensate).
Power supply: 230 VAC, 50/60 Hz, 3 VA (approximate); 115 VAC or 12- 24 VAC/DC or 12 VAC/DC by request.
Alarm buzzer: by request.
Measure inputs: 1 (cabinet probe) for PTC/NTC probes.
Digital inputs: 1 (multipurpose/door switch) for NO/NC contact (free of voltage, 5 V 1 mA) also configurable for measure input (evaporator or condenser probe, for PTC/NTC probes).
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:1 relay:
Compressor relay: 16 res. A @ 250 VAC (change-over contact).
The maximum current allowed on the load is 10 A.
Serial port: port for the communication with the supervision system (through a serial interface, via TTL, with MODBUS communication protocol) or with the programming key; by request.
Further communication ports: port for the communication with the remote indicator; by request.
WORKING SETPOINTS AND CONFIGURATION PARAMETERS
| MIN. | MAX. | U.M. | DEF. | WORKING SETPOINTS | |
| r1 | r2 | °C/°F (1) | 0.0 | working setpoint |
| PARAM. | MIN. | MAX. | U.M. | DEF. | WORKING SETPOINTS |
| SP | r1 | r2 | °C/°F (1) | 0.0 | working setpoint |
| PARAM. | MIN. | MAX. | U.M. | DEF. | MEASURE INPUTS |
| CA1 | -25.0 | 25.0 | °C/°F (1) | 0.0 | cabinet probe offset |
| CA2 | -25.0 | 25.0 | °C/°F (1) | 0.0 | auxiliary probe offset (only if P4 = 1 or 2) |
| P0 | 0 | 1 | – – – | 1 | kind of probe 0 = PTC
1 = NTC |
| P1 | 0 | 1 | – – – | 1 | decimal point Celsius degree (for the quantity to show during the normal operation)
1 = YES |
| P2 | 0 | 1 | – – – | 0 | unit of measure temperature (2) 0 = °C
1 = °F |
| P4 | 0 | 3 | – – – | 3 | second input function 0 = input not enabled
1 = measure input (evaporator probe) 2 = measure input (condenser probe) 3 = digital input (multipurpose/door switch input) |
| P5 | 0 | 2 | – – – | 0 | quantity to show during the normal operation 0 = cabinet temperature
1 = working setpoint 2 = temperature read by the auxiliary probe (only if P4 = 1 or 2) |
| PARAM. | MIN. | MAX. | U.M. | DEF. | MAIN REGULATOR |
| r0 | 0.1 | 15.0 | °C/°F (1) | 2.0 | working setpoint differential |
| r1 | -99.0 | r2 | °C/°F (1) | -50.0 | minimum working setpoint |
| r2 | r1 | 99.0 | °C/°F (1) | 50.0 | maximum working setpoint |
| r3 | 0 | 1 | – – – | 0 | locking the working setpoint modification (with the procedure related in paragraph 3.1; 1 = YES) |
| r4 | 0.0 | 99.0 | °C/°F (1) | 0.0 | temperature increase during function Energy Saving (only if P4 = 3 and i0 = 0); also look at i5 |
| PARAM. | MIN. | MAX. | U.M. | DEF. | COMPRESSOR PROTECTIONS |
| C0 | 0 | 240 | min | 0 | compressor delay since you turn on the instrument |
| C1 | 0 | 240 | min | 5 | minimum time between two activations in succession of the compressor; also compressor delay since
the end of the cabinet probe error (3) |
| C2 | 0 | 240 | min | 3 | minimum time the compressor remains turned off |
| C3 | 0 | 240 | s | 0 | minimum time the compressor remains turned on |
| C4 | 0 | 240 | min | 10 | time the compressor remains turned off during the cabinet probe error; also look at C5 |
| C5 | 0 | 240 | min | 10 | time the compressor remains turned on during the cabinet probe error; also look at C4 |
| C6 | 0.0 | 199.0 | °C/°F (1) | 80.0 | condenser temperature above which the overheated condenser alarm is activated (only if P4 = 2) (4) |
| C7 | 0.0 | 199.0 | °C/°F (1) | 90.0 | condenser temperature above which the compressor locked alarm is activated (only if P4 = 2) |
| C8 | 0 | 15 | min | 1 | compressor locked alarm delay (only if P4 = 2) (5) |
| PARAM. | MIN. | MAX. | U.M. | DEF. | DEFROST |
| d0 | 0 | 99 | h | 8 | defrost interval; also look at d8 (6)
0 = the defrost at intervals will never be activated |
| d2 | -99.0 | 99.0 | °C/°F (1) | 2.0 | defrost cutoff temperature (only if P4 = 1) |
| d3 | 0 | 99 | min | 30 | defrost duration if P4 = 0, 2 or 3; defrost maximum duration if P4 = 1
0 = the defrost will never be activated |
| d4 | 0 | 1 | – – – | 0 | defrost when you turn on the instrument
1 = YES |
| d5 | 0 | 99 | min | 0 | defrost delay when you turn on the instrument (only if d4 = 1); also look at i5 |
| d6 | 0 | 1 | – – – | 1 | temperature shown during the defrost 0 = cabinet temperature
1 = if to the defrost activation the cabinet temperature is below “working setpoint + r0”, at most “work- ing setpoint + r0”; if to the defrost activation the cabinet temperature is above “working setpoint + r0”, at most the cabinet temperature to the defrost activation (7) |
| d8 | 0 | 2 | – – – | 0 | kind of defrost interval
0 = the defrost will be activated when the instrument will have remained turned on the time d0 1 = the defrost will be activated when the compressor will have remained turned on the time d0 2 = the defrost will be activated when the evaporator temperature will have remained below the tem- perature d9 the time d0 (only if P4 = 1) (8) |
| d9 | -99.0 | 99.0 | °C/°F (1) | 0.0 | evaporator temperature above which the count of the defrost interval is suspended (only if P4 = 1 and
d8 = 2) |
| PARAM. | MIN. | MAX. | U.M. | DEF. | TEMPERATURE ALARMS |
| A0 | 0 | 1 | – – – | 0 | temperature joined to the lower temperature alarm 0 = cabinet temperature
1 = temperature read by the auxiliary probe (only if P4 = 1 or 2) (9) |
| A1 | -99.0 | 99.0 | °C/°F (1) | -10.0 | temperature below which the lower temperature alarm is activated; also look at A0 and A2 (4) |
| A2 | 0 | 2 | – – – | 1 | kind of lower temperature alarm 0 = alarm not enabled
1 = relative to the working setpoint (or “working setpoint – A1”; consider A1 without sign) 2 = absolute (or A1) |
| A3 | 0 | 1 | – – – | 0 | temperature joined to the upper temperature alarm 0 = cabinet temperature
1 = temperature read by the auxiliary probe (only if P4 = 1 or 2) (9) |
| A4 | -99.0 | 99.0 | °C/°F (1) | 10.0 | temperature above which the upper temperature alarm is activated; also look at A3 and A5 (4) |
| A5 | 0 | 2 | – – – | 1 | kind of upper temperature alarm 0 = alarm not enabled
1 = relative to the working setpoint (or “working setpoint + A4”; consider A4 without sign) 2 = absolute (or A4) |
| A6 | 0 | 240 | min | 120 | upper temperature alarm delay since you turn on the instrument (only if A3 = 0) |
| A7 | 0 | 240 | min | 15 | temperature alarm delay |
| A8 | 0 | 240 | min | 15 | upper temperature alarm delay since the end of the defrost (only if A3 = 0) (10) |
| A9 | 0 | 240 | min | 15 | upper temperature alarm delay since the deactivation of the door switch input (only if P4 = 3 and
i0 = 3) (11) |
| PARAM. | MIN. | MAX. | U.M. | DEF. | DIGITAL INPUTS (only if P4 = 3) |
| i0 | 0 | 3 | – – – | 3 | kind of digital input
0 = MULTIPURPOSE INPUT – in this case look at parameters i1, i5, i7, i8 and i9 1 = RESERVED 2 = RESERVED 3 = DOOR SWITCH INPUT – in this case look at parameters i1, i2 and i3; the activation of the input will turn off the compressor (at most the time i3 or as long as the input will be deactivated) (12) |
| i1 | 0 | 2 | – – – | 0 | kind of contact digital input
0 = NO (input active if you close the contact) 1 = NC (input active if you open the contact) 2 = input not enabled |
| i2 | -1 | 120 | min | 30 | delay to signal the door switch input alarm
-1 = no signal |
| i3 | -1 | 120 | min | 15 | maximum duration of the effect provoked by the activat. of the door switch input (-1 = the effect will last
as long as the input will be deactivated) |
| i5 | 0 | 5 | – – – | 3 | effect provoked by the activation of the multipurpose input 0 = no effect
1 = SYNCHRONIZING THE DEFROSTS – spent the time d5 the defrost will be activated (13) 2 = ACTIVATING THE ENERGY SAVING – function Energy Saving will be activated (as long as the input will be deactivated); also look at r4 (13) 3 = ACTIVATING THE EXTERNAL ALARM – spent the time i7 the display will show the code “iA” flashing and the buzzer will be activated (as long as the input will be deactivated) 4 = ACTIVATING THE MANOSTAT – the compressor will be turned off, the display will show the code “iA” flashing and the buzzer will be activated (as long as the input will be deactivated); also look at i7, i8 and i9 5 = TURNING OFF THE INSTRUMENT – the instrum. will be turned off via software (as long as the input will be deact.); also look at C0, d4 and A6 |
| i7 | 0 | 120 | min | 0 | if i5 = 3, delay to signal the multipurpose input alarm
if i5 = 4, compressor delay since the deactivation of the multipurpose input (14) |
| i8 | 0 | 15 | – – – | 0 | number of multipurpose input alarms such as to provoke the instrument locked alarm (only if i5 = 4)
0 = alarm not enabled |
| i9 | 1 | 999 | min | 240 | time without multipurpose input alarms in order that the alarm counter is cleared (only if i5 = 4) |
| PARAM. | MIN. | MAX. | U.M. | DEF. | VARIOUS |
| t0 | 0 | 1 | – – – | 0 | turning on/off the instrument (via software) by hand through button 1 = YES |
| t1 | 0 | 1 | – – – | 0 | kind of data to be counted (15) 0 = compressor working days
1 = instrument working days (16) |
| t2 | 0 | 1,999 | d | 100 | if t1 = 0, number of compressor working days above which service is requested if t1 = 1, number of instrument working days above which service is requested
0 = function not enabled |
| PARAM. | MIN. | MAX. | U.M. | DEF. | SERIAL NETWORK (MODBUS) |
| LA | 1 | 247 | – – – | 247 | instrument address |
| Lb | 0 | 3 | – – – | 2 | baud rate
0 = 2,400 baud 1 = 4,800 baud 2 = 9,600 baud 3 = 19,200 baud |
| LP | 0 | 2 | – – – | 2 | parity
0 = none 1 = odd 2 = even |
| PARAM. | MIN. | MAX. | U.M. | DEF. | RESERVED |
| E9 | 0 | 1 | – – – | 1 | reserved |
- The unit of measure depends on parameter P2
- Set the parameters related to the regulators appropriately after the modification of the parameter P2
- If parameter C1 has value 0, the delay since the end of the cabinet probe error will however be 2 min
- The differential of the parameter is 2.0 °C/4 °F
- If (when you turn on the instrument) the condenser temperature is above the one you have set with parameter C7, parameter C8 will have no effect
- The instrument stores the count of the defrost interval every 30 min; the modification of parameter d0 has effect since the end of the previous defrost interval or since the activation of a defrost by hand
- The display restores the normal operation as soon as the defrost ends and the cabinet temperature falls below the one that has locked the display (or if a temperature alarm arises)
- If parameter P4 has value 0, 2 or 3, the instrument will work as if parameter d8 had value 0
- If parameter P4 has value 0 or 3, the instrument will work as if parameter had value 0
- During the defrost the temperature alarms are not enabled, on condition that they have arisen after the activation of the defrost
- During the activation of the door switch input the upper temperature alarm is not enabled, on condition that it has arisen after the activation of the input
- The compressor is turned off spent 10 s since the activation of the input
- The effect is not signalled
- Make sure the time you have set with parameter i7 is shorter than the one you have set with parameter i9
- Erase the working days after the modification of parameter t1
- The instrument counts the working days also when it is turned off via software.
EVCO S.p.A.
Via Mezzaterra 6, 32036 Sedico Belluno ITALY Phone +39-0437-852468 Fax +39-0437-83648 [email protected] www.evco.it