EK 825A GENERAL CHARACTERISTICS •
Front Face:
72 x 144mm
•
Power Supply:
230v
•
Six Easy Select Functions:
Blast Chill, Cold Storage, Blast Chill &
Storage, Blast Freeze, Frozen Storage, Blast Freeze & Frozen Storage •
Adjustable Temperature and Time settings
•
Audible Alarm Fitted
•
One 3 Digit 125mm LED Display for Temperature
•
One 3 Digit 125mm LED Display for Cycle Time Remaining
•
Manual or Automatic Defrost Option
•
Three Measure Inputs (Cabinet, Evaporator & Needle Probe) for PTC probe
•
One Configurable Door Switch Digital Input
•
One Configurable locking Digital Input
EK 825A is an ON-OFF digital controller suited for the Blast Chill/Freeze Cycle management through the Compressor, Evaporator Fans, Defrost and Cabinet Lights. The unit allows the regulation of time and temperature through established parameters, of automatic Blast Chill/Freeze Cycles. The controller has six different functions, each of which is listed below: •
Blast Chill (for temperature or time) During which the controller regulates the rapid cooling of pre-cooked foods within the maximum established time
•
Cold Storage The controller will work as a natural thermostat (with evaporator fans and defrost management) to maintain the cabinet temperature within the established parameters
•
Blast Chill/Store This function will chill the food to the required temperature and hold it
•
Blast Freeze This function rapidly cools the food for storage until frozen to the chosen temperature
•
Frozen Storage The controller uses the evap fans and the defrost management to maintain the frozen temperature of the food
•
Blast Freeze/Store This function will rapidly freeze the food and maintain it as frozen by regulating the temperature and fans inside the cabinet.
In order to ensure the smooth running of a cycle of Blast Chill/Freezing, it is necessary to ensure that the needle probe is positioned correctly inside the product. The controller will perform a test to verify the proper insertion of the needle probe. Completing this test will ensure that the alarms signals will react correctly. This controller is fitted with 2 temperature alarms, the first kind of alarm will be an intermittent beep with the corresponding alarm being shown on the cabinet display alternating with the temperature Other alarms (wrong probe, faulty probe, bad connection, high ambient conditions etc) will sound intermittently as the first alarm and will display an alarm code that requires immediate attention to prevent failure.
OPERATION Please refer to the diagram below before proceeding to operate the cabinet, a guide to the function keys is as follows: BLAST FREEZE
BLAST CHILL
DEFROST
CHILL/ STORE
FREEZE/ STORE
CHILL TEMP ACHIEVED
FREEZE TEMP ACHIEVED
DISPLAY TEMP SET TIME DISPLAY TIME SOFT/HARD START
START
UP
DOWN
Pressing the START key will put the machine into operation, where it will restart the last programme entered. In the event of power supply loss, the machine will recover and resume the previous operation once power has been restored, however the cycle time will be reset. Pressing the SET TIME key whilst the machine is stopped selects the amount of time for the chosen cycle, it is also possible to select which cycle you require whilst the machine is stopped.
1. BLAST CHILL CYCLE (By Temperature) Press the BLAST CHILL button to select this cycle and the START button to begin. If the parameter d4 is set to 1 and if the conditions allow it (the temp of the evaporator probe must be below the amount established in parameter d2) The unit automatically begins a defrost cycle to ensure the best performance from the refrigeration system. The codes on the DISPLAY TEMP and DISPLAY TIME respectively should show dEF and the time established within parameter c1. In order to ensure a smooth cycle of blast chilling it is essential the needle probe is properly positioned inside the product, so the unit will carry out a test to verify proper insertion of the needle. After a successful test and if the conditions permit it (The eventual defrost cycle must be finished and the temperature of the needle probe must be lower than that set in parameter c8) The unit will begin the cycle. The DISPLAY TEMP and DISPLAY TIME respectively display the needle probe temperature and the time remaining of the cycle. The temperature that regulates the compressor is read by the cabinet probe, the parameter cb is used for the set point, whilst the parameter c0 is the differential. When the temperature read by the needle probe reaches the desired temperature as set in parameter c2 the cycle has ended. The buzzer will emit an intermittent beep for the time established within parameter c9, the DISPLAY TEMP and DISPLAY TIME respectively display End and ---, the compressor, evaporator fans and the defrost outputs are deactivated. Pushing the START key, readies the machine for the next cycle . Pushing the SET TIME key displays the time in minutes to reach the temperature established in parameter c2.
1a. BLAST CHILL CYCLE (Timed) Push the keys BLAST CHILL and SET TIME to select this cycle. The indicator DISPLAY TIME displays the length of the cycle, to adjust this, use the UP & DOWN keys and press the START button to begin. If the parameter d4 is set to 1 and if the conditions allow it (the temp of the evaporator probe must be below the amount established in parameter d2) The unit automatically begins a defrost cycle to ensure the best performance from the refrigeration system. The codes on the DISPLAY TEMP and DISPLAY TIME respectively should show dEF and the time established within parameter c1. When the defrost ends the unit starts the cycle, the DISPLAY TEMP and DISPLAY TIME respectively display the temperature of the probe and the time remaining of the cycle. Pushing the SET TIME key will display in minutes the elapsed time of the cycle.
The kind of temperature regulation is ON-OFF: The temperature that regulates the compressor activity is the temperature read by the cabinet probe. the parameter cb is used for the set point, whilst the parameter c0 is the differential. When the set time has elapsed, the cycle will end, the buzzer will activate with an intermittent beep for the length of time established in parameter c9 the DISPLAY TEMP and DISPLAY TIME will respectively indicate End flashing and 0, the compressor, evaporator fans and defrost output get deactivated, push the START key to reset the machine for the next cycle.
2. COLD STORAGE Push the CHILL/STORE button to select this cycle and the START key to begin. The DISPLAY TEMP and DISPLAY TIME respectively read the cabinet temperature and the indication ---. The unit works a normal thermostat with evaporator fans and defrost management. The kind of temperature regulation is ON-OFF and the temperature which regulates the compressor activity is read by the cabinet probe. The set point can be established with parameter c3 and the hysteresis with the parameter c0, the temperature that regulates the evaporator fans is set by the evaporator probe, the set point can be established with the parameter F1 and the hysteresis with F2
3a. BLAST CHILL/STORE (Temperature) Push the BLAST CHILL and CHILL/STORE buttons to select this cycle and the START button to begin. When the BLAST CHILL (as described in section 1) phase is over the unit will move into cold storage mode (as described in section 2)
3b. BLAST CHILL/STORE (Timed) Push the buttons BLAST CHILL, CHILL/STORE and SET TIME to select this cycle, the DISPLAY TIME indicates the length of time for the BLAST CHILL and can be modified by using the UP and DOWN keys. Press the START button to begin. When the BLAST CHILL cycle has ended (as described in section 1a) the unit will go into cold storage mode (as described in section 2)
4. BLAST FREEZE (Temperature) Press the BLAST FREEZE button to select this cycle and the START button to begin. If the parameter d4 is set to 1 and if the conditions allow it (the temp of the evaporator probe must be below the amount established in parameter d2) The unit automatically begins a defrost cycle to ensure the best performance from the refrigeration system. The codes on the DISPLAY TEMP and DISPLAY TIME respectively should show dEF and the time established within parameter c4. In order to ensure a smooth cycle of blast freezing it is essential the needle probe is properly positioned inside the product, so the unit will carry out a test to verify proper insertion of the needle. After a successful test and if the conditions permit it (The eventual defrost cycle must be finished and the temperature of the needle probe must be lower than that set in parameter c8) The unit will begin the cycle. The DISPLAY TEMP and DISPLAY TIME respectively display the needle probe temperature and the time remaining of the cycle. The temperature that regulates the compressor is read by the cabinet probe, the parameter cC is used for the set point, whilst the parameter c0 is the differential. When the temperature read by the needle probe reaches the desired temperature as set in parameter c5 the cycle has ended. The buzzer will emit an intermittent beep for the time established within parameter c9, the DISPLAY TEMP and DISPLAY TIME respectively display End and ---, the compressor, evaporator fans and the defrost outputs are deactivated. Pushing the START key, readies the machine for the next cycle . Pushing the SET TIME key displays the time in minutes to reach the temperature established in parameter c5 When the time established with the parameter c4 ends, if the temperature read by the needle probe is not lower than the temperature set in parameter c5, the cycle will continue, the buzzer will activate until it is stopped (DOWN key will stop the buzzer) The indicators DISPLAY TEMP and DISPLAY TIME respectively display the temperature read by the needle probe and 0 flashing, the refrigeration system remains active. Pushing the SET TIME key will DISPLAY TIME elapsed in minutes from the start of the cycle.
4a. BLAST FREEZE (Timed) Push the keys BLAST FREEZE and SET TIME to select this cycle. The indicator DISPLAY TIME displays the length of the cycle, to adjust this, use the UP & DOWN keys and press the START button to begin. If the parameter d4 is set to 1 and if the conditions allow it (the temp of the evaporator probe must be below the amount established in parameter d2) The unit automatically begins a defrost cycle to ensure the best performance from the refrigeration system. The codes on the DISPLAY TEMP and DISPLAY TIME respectively should show dEF and the set duration of the cycle. When the defrost ends the unit starts the cycle, the DISPLAY TEMP and DISPLAY TIME respectively display the temperature of the probe and the time remaining of the cycle. Pushing the SET TIME key will DISPLAY TIME in minutes elapsed since the start of the cycle. The kind of temperature regulation is ON-OFF: The temperature that regulates the compressor activity is the temperature read by the cabinet probe. the
parameter cC is used for the set point, whilst the parameter c0 is the differential, the evaporator fans status is forced to ON When the set time has elapsed, the cycle will end, the buzzer will activate with an intermittent beep for the length of time established in parameter c9 the DISPLAY TEMP and DISPLAY TIME will respectively indicate End flashing and 0, the compressor, evaporator fans and defrost output get deactivated, push the START key to reset the machine for the next cycle.
5. FROZEN STORAGE Push the FREEZE/STORE button to select this cycle and the START key to begin. The DISPLAY TEMP and DISPLAY Time respectively should display the cabinet temperature and the indication ---. The unit works as a normal thermostat with evaporator fans and defrost management . The kind of temperature regulation is ON-OFF and the temperature which regulates the compressor activity is read by the cabinet probe. The set point can be established with parameter c6 and the hysteresis with the parameter c0, the temperature that regulates the evaporator fans is set by the evaporator probe, the set point can be established with the parameter F1 and the hysteresis with F2
6. BLAST FREEZE/STORE (Temperature) Push the BLAST FREEZE and FREEZE/STORE buttons to select this cycle and the START button to begin. When the BLAST FREEZE (as described in section 4) phase is over the unit will move into frozen storage mode (as described in section 5)
6a. BLAST FREEZE/STORE (Timed) Push the buttons BLAST FREEZE, FREEZE/STORE and SET TIME to select this cycle, the DISPLAY TIME indicates the length of time for the BLAST FREEZE and can be modified by using the UP and DOWN keys. Press the START button to begin. When the BLAST FREEZE cycle has ended (as described in section 4) the unit will go into frozen storage mode (as described in section 5).
7. CORRECT POSITIONING OF NEEDLE PROBE At the activation of any cycle of BLAST CHILL/FREEZING the unit will automatically carry out a test to ensure that the needle probe is inserted correctly. The test is in 2 parts, Fast and Differential. A successful Fast test will exclude the Differential. During the Fast test, the unit verifies 5 times if the value obtained, minus the cabinet temperature that the temperature of the needle probe is higher than the set parameter c7. (the test is successful if this is the case on 3 out of 5 occasions). Each individual test is 10 seconds and the total time for the test is 50 seconds (approx) During the differential test, the unit verifies for peak times that the value obtained with the subtraction of the cabinet temperature on the needle probe differs by at least 1ËšC since. (the test is successful if this is the case on at least 6 of the 8 tests) This is with the parameter cE individual test time) at 4 seconds. To exclude the differential test, set the parameter cE to less than 4 seconds and the parameter c7 to 0.
If this test is unsuccessful the cycle will not end and the buzzer will beep intermittently, this can be turned off by pressing the DOWN key. The DISPLAY TEMP and DISPLAY TIME will respectively show 0—alternately with the cabinet temperature and decrease the time established with parameter c1 or c4. Push the DEFROST button to manually confirm correct insertion of the needle probe.
8. SOFT/HARD BLAST CHILL This mode is only available during a BLAST CHILL cycle. During the BLAST CHILL phase, this operation is divided into 2 parts, a hard phase (very low set point to maximise the BLAST CHILL by temperature efficiency) and a soft phase (the set point is higher than the previous one) To select the SOFT/HARD Blast chill cycle press the SOFT/HARD START button when the unit is in standby mode. If a BLAST CHILL (Temp) cycle is selected, during the hard phase the working set point of the compressor can be established with the parameter cF (the hard phase ends when the needle probe temperature reaches the set point established with the parameter cd), during the soft phase, the compressor works in the same ways as in section 1. If a BLAST CHILL (Timed) is selected, during the hard phase, the working set point of the compressor can be established with the parameter cF (the hard phase ends when the set time in parameter t1 has elapsed) during the soft phase, the compressor works in the same way as described in section 1a. To deselect the SOFT/HARD chill push any of the BLAST CHILL/FREEZE buttons whilst the unit is in standby.
9. DOOR SWITCH INPUT (dedicated parameters u0, u1, u2) The unit comes with a door switch input, which when activated does not end a cycle, but determines the actions established with parameters u0 and u1 and is indicated in the DISPLAY TEMP window with the symbol ]-[ alternating with the previous value shown and the intermittent beep of the alarm will sound. A door switch input on alarm will not allow the start of any cycle.
10. LOCK INPUT (dedicated parameters u3, u4) The unit comes with a locking device which deactivates at the end of a cycle and activates the alarm buzzer with an intermittent beep. The DISPLAY TEMP will show E4 alternating with the temperature of the cabinet/needle probe. The compressor, evaporator fans and defrost outputs are deactivated and no cycle is permitted to run whilst there is an outstanding lock input alarm.
11. MANUAL DEFROST Press the DEFROST button whilst the unit is in STOP mode to select the DEFROST cycle. If the conditions permit (the evaporator probe temperature must be below the set point of parameter d2 apart from the value established with the parameter d4) press the START key to begin the defrost cycle. The DISPLAY TEMP and DISPLAY TIME windows will respectively read dEF and according to the selected cycle the time established with parameter c1, or the length of the timed BLAST CHILL cycle or the indication ---. Press the DEFROST button during a cycle of cold storage and hold in for 4 seconds to begin a DEFROST. The DISPLAY TEMP and DISPLAY TIME windows will display dEF and ---.
A defrost cycle on run can be finished immediately by holding the DEFROST button in for at least 4 seconds.
12. MANUAL VENTILATION Push the DEFROST button during STOP status for at least 4 seconds to force evaporator fans on or off.
13. BORDERLINE CASES •
If the parameter d1 has a value of 2 the parameters d7, F0, F1, F2, F3, F4, F5 and u1 do not work on the evaporator fans output during a defrost cycle
•
If the parameter d1 has a value of 2 the door switch input on alarm happened during a defrost cycle and does not activate the alarm buzzer with an intermittent beep
•
If the parameter u1 has a value of 1, the door switch input alarm happened during a manual ventilation and does not affect the evaporator fans output.
•
In the event of loss or interruption of the power supply, during a defrost at the beginning of a cycle of BLAST CHILL/FREEZING, once the power is restored the defrost cycle will only activate if the evaporator probe temperature is below that set with the parameter d2 and if the parameter d4 has a value of 1.
14. SIGNALS SIGNAL FREEZE TEMP ACHIEVED IS LIT CHILL TEMP ACHIEVED IS LIT SOFT/HARD START IS LIT DEFROST LIGHT IS LIT DISPLAY TEMP LED LIT DISPLAY TIME LED LIT DISPLAY TIME RED LED LIT START BUTTON IS LIT DISPLAY TEMP SHOWS dEF DISPLAY TEMP FLASHES dEF
CAUSE Cold Storage cycle is running Blast Chill/Freeze cycle is running Soft/Hard Blast Chill mode selected A manual ventilation is running Blast Chill/Freeze (Temp) selected Blast Chill/Freeze (Timed) selected Unit is ready to countdown, but cannot proceed until temperature criteria is met The unit is on A defrost cycle is running A delay count for the def4roast cycle is running (parameter C0, C1, C2 and d1)
ALARMS (1/3) ALARM DISPLAY TEMP flashes E0 with intermittent beep DISPLAY TEMP flashes E1 alternating with a temperature value and intermittent beep DISPLAY TEMP flashes with E2 with intermittent beep
CAUSE Cabinet Probe Failure Evaporator probe failure
SOLUTION Check probe is suitable and undamaged Check probe is suitable and undamaged
Corrupted memory data alarm
Disconnect and reconnect to the power, if problem persists after reset, replace unit.
ALARMS (2/3) ALARM DISPLAY TEMP flashes E3 alternating with a temperature value and intermittent beep DISPLAY TEMP flashes E4 alternating with a temperature value and intermittent beep DISPLAY TEMP flashes 0—with intermittent beep DISPLAY TEMP flashes End with intermittent beep
DISPLAY TEMP flashes End and display time displays 0 with intermittent beep DISPLAY TEMP shows a temp value and DISPLAY TIME flashes 0 with intermittent beep DISPLAY TEMP shows End and DISPLAY TIME shows --- with intermittent beep
CAUSE Needle probe failure
SOLUTION Check probe is suitable and undamaged
Locking input alarm
Deactivate high pressure input and if alarm occurs during START push the start button for a new cycle Press START to reset for new cycle Press START to reset for new cycle
Needle probe test failure Blast chill/freeze (temp) cycle successfully completed Blast chill/freeze (timed) cycle successfully completed Probe has not reached required temp in the time set Blast chill/freeze cycle failed and out of maximum length
Press START to reset for new cycle
Press START to reset for new cycle
Press START to reset for new cycle
ALARMS (3/3) ALARM DISPLAY TEMP shows temperature value and DISPLAY TIME flashes -- with intermittent beep DISPLAY TEMP flashes ]-[ alternating with temperature value DISPLAY TEMP flashes ]-[ alternating with temperature value with intermittent beep DISPLAY TEMP flashes ]-[ alternating with dEF
CAUSE Blast chill/freeze failed and out of maximum length and cold storage running
SOLUTION Press START key to begin new cycle
Door switch input alarm
Deactivate the door switch input
Door switch input alarm
Deactivate the door switch input
Door switch input is on during defrost
DISPLAY TEMP flashes ]-[ alternating with dEF and intermittent beep
Door switch input is on during a defrost cycle managed at resistances or at hot gas (Parameter d1) The temperature read by the probe is outside the established parameter A1 (A3) or A2 (A4)
When defrost ends, deactivate the door switch input Deactivate the door switch input
DISPLAY TEMP flashes AL alternating with a temperature value and intermittent beep
Check whether the cabinet temperature is moving toward the set parameters
PROCEDURE OF CONFIGURATION PARAMETERS PROGRAMMING The configuration parameters programming can be done during the status "STOP" only, if there is not a corrupted memory data alarm. There are two Levels of configuration (Level 2 is protected by password):
Level 1 Keep pushed
T8
and
T9
at the same time for 4 seconds at least: on the indicator DY 1 appear the
Push
T8
or
T9
to select the parameter to modify at Level 1.
T 10
and
T8
or
T9
to modify the selected parameter: after the modify release the key T 10 as last.
T8
or
T9
to select the parameter "PA".
or
T9
parameter "PA". Keep pushed
Level 2 From Level 1 push Keep pushed
T 10
and
T8
Keep pushed
T8
and
T9
Push
T8
or
T9
T 10
and
T8
to set "-19": after the modify release the key T 10 as last. at the same time for 4 seconds at least: on the indicator DY 1 appear the first parameter of Level 2.
Keep pushed
to select the parameter to modify at Level 2. or
T9
to modify the selected parameter: after the modify release the key T 10 as last.
How to leave the PROCEDURE Keep pushed
T8
and
T9
at the same time for 4 seconds at least or wait 50 seconds without operate on the keyboard (time-out exit) or stop and restart the instrument after about 1 second from the last modify.
10
CONFIGURATION PARAMETERS (1/2) NOTE CODE (1)
PARAMETER
PA
password
DESCRIPTION
MIN.
MAX.
U.M.
STAND.
-55
99
---
---
-10
+10
°C
0
+1
+15
°C
+2
/
MEASURE INPUTS
(1)
/1
calibration (ref. to the cabinet probe)
c
QUICK-COOLING/FREEZING AND COLD-STORING ON-OFF REGULATOR
(1)
c0
hysteresis (differential, ref. to the cabinet probe)
(1)
c1
maximum length of the quick-cooling for temperature
1
400
min.
90
(1)
c2
quick-cooling for temperature cut off set (ref. to the needle probe)
-55
+99
°C
+10
(1)
c3
cold-storing set (ref. to the cabinet probe)
-55
+99
°C
+3
(1)
c4
maximum length of the quick-freezing for temperature
1
400
min.
270
(1)
c5
quick-freezing for temperature cut off set (ref. to the needle probe)
-55
+99
°C
-18
(1)
c6
very cold-storing set (ref. to the cabinet probe)
-55
+99
°C
-25
c7
threshold for needle probe properly positioned fast-test
0
+99
°C
+30
(1)
c8
quick-cooling/freezing for temperature enabling set (ref. to the needle probe)
-55
+99
°C
+65
c9 (1)(2) cA
alarm buzzer activation length when a quick-cooling/freezing ends
0
99
sec.
3
needle probe reading
---
---
°C
---
(1)
cb
quick-cooling working set (ref. to the cabinet probe)
-55
+99
°C
-10
(1)
cC
quick-freezing working set (ref. to the cabinet probe)
-55
+99
°C
-55
(1)
cd
Hard-phase cut off set (ref. to the needle probe)
-55
+99
°C
-15
cE
during of the needle probe properly positioned differential-test
1
99
sec.
255
-55
+99
°C
+15
1
400
min.
60
(1)
cF
Hard-phase working set (ref. to the cabinet probe)
t
HARD-PHASE DURING A QUICK-COOLING FOR TIME
C0
Hard-phase during
C
COMPRESSOR OUTPUT PROTECTIONS
C0
disabling time at the output activation from the instrument start
0
99
min.
0
C1
disabling time at the output activation from the preceding activation
0
99
min.
0
C2
disabling time at the output activation from the preceding deactivation
0
99
min.
0
C5
cycle time for the output activation in case of cabinet probe failure
0
99
min.
10
C6
output activation length during the cold-storing in case of cabinet probe failure
0
99
min.
3
C7
output activation length during the very cold-storing in case of cabinet probe failure
0
99
min.
8
d
DEFROST REGULATOR
(3)
d0
defrost interval
0
99
hours/min.
8
(4)
d1
kind of defrost
0
2
---
1
d2
defrost cut off set (ref. to the evaporator probe)
-55
+99
°C
+2
d3
maximum defrost length
1
99
min./sec.
30
d5
first defrost intervall from the begin of the cold-storing phase
0
99
min.
0
d4
defrost at the beginning of the quick-cooling/freezing 0=NO; 1=YES
0
1
---
0
d7
dripping length
0
99
min./sec.
2
d9
forced defrost (delays override)
0
1
---
0
(5)
(1)(2) dA (6) (7)
(8)
evaporator probe reading
---
---
°C
---
db
times base for the parameters d0, d3, d7 and F5
0
1
---
0
F
EVAPORATOR FANS REGULATOR
F0
output activity
0
1
---
0
F1
output deactivation set (ref. to the evaporator probe)
-55
+99
°C
-1
F2
hysteresis (differential, ref. to the evaporator probe)
+1
+15
°C
+1
F3
output deactivated if the compressor is deactivated
0=NO; 1=YES
0
1
---
1
F4
output deactivated during the defrost
0=NO; 1=YES
F5
disabling time at the output activation from the end of the dripping
u
DIGITAL INPUTS
u0
door-switch activate cabinet light output
0=NO; 1=YES
0
1
---
1
0
99
min./sec.
3
0
1
---
1
11
CONFIGURATION PARAMETERS (2/2) NOTE CODE (8)
u1
PARAMETER
DESCRIPTION
MIN.
MAX.
U.M.
STAND.
door-switch deactivate evaporator fans output
0=NO; 1=YES
0
1
---
1
(8)
u2
door-switch input polarity
0=NO; 1=NC
0
1
---
0
(8)
u3
locking input polarity
0=NO; 1=NC
0
1
---
0
u4
disabling time of the locking input on alarm
0
999
sec.
5
A
TEMPERATURE ALARM REGULATOR
A0
hysteresis (differential, ref. to the cabinet probe)
+1
+15
°C
+2
(9)
A1
lower temperature alarm set relative to the cold-storing set (ref. to the cabinet probe)
-99
0
°C
0
(9)
A2
upper temperature alarm set relative to the cold-storing set (ref. to the cabinet probe)
0
+99
°C
0
(9)
A3
lower temperature alarm set relative to the very cold-storing set (ref. to the cabinet probe) -99
0
°C
0
(9)
A4
upper temperature alarm set relative to the very cold-storing set (ref. to the cabinet probe)
0
+99
°C
0
A5
disabling time of the alarm temperature from the beginning of the cold-storing
0
255
min.
30
A6
disabling time of the alarm temperature
0
255
min.
0
L
RESERVED
L1
reserved
---
---
---
---
L2
reserved
---
---
---
---
L3
reserved
---
---
---
---
L4
reserved
---
---
---
---
MIN.
MAX.
U.M.
STAND.
0
999
min.
90
QUICK-COOLING/FREEZING FOR TIME NOTE CODE
PARAMETER
DESCRIPTION
quick-cooling/freezing for time length
NOTES (1)
=
configuration parameters present on Level 1.
(2)
=
reading parameter (it can not be changed).
(3)
=
it establishes the time between the start of an automatic or manual defrost and the start of the following automatic one and, during a cycle/phase of cold-storing, the time between the start of the cycle/phase of cold-storing and the start of the first automatic defrost; if the parameter has value 0 the automatic defrost will never be activated, excepting the parameter d4.
(4)
=
it establishes the kind of defrost that the instrument must manage, as indicated: 0=resistances (during the defrost compressor output deactivated and defrost output activated), 1=hot gas (during the defrost compressor and defrost outputs activated), 2=air (during the defrost evaporator fans and defrost outputs activated).
(5)
=
it establishes if to subjugate the compressor output to the disabling time established with the parameters C0, C1 and C2 or to clear this times when a defrost is requested, as indicated: 0=the disabling time are observed, 1=the disabling time are cleared.
(6)
=
it establishes the measure unit for the parameters d0, d3, d7 and F5, as indicated: 0=the measure unit for the parameter d0 is hours, the measure unit for the parameters d3, d7 and F5 is minutes, 1=the measure unit for the parameter d0 is minutes, the measure unit for the parameters d3, d7 and F5 is seconds.
(7)
=
it establishes the output activity, as indicated: 0=the output activity depends from the temperature read by the evaporator probe and from the parameters F1 and F2, excepting the parameters d7, F3, F4 and F5, 1=the output is continuously activated, excepting the parameters d7, F3, F4 and F5.
(8)
=
set to 0 this parameter if the digital inputs are not used.
(9)
=
if the parameter has value 0 the temperature alarm is disabled.
12
INSTALLATION For a proper installation take note of the attached indications. Be sure that the conditions of use (environment temperature, humidity, power supply voltage, etc ...) are inside the indicated limits. Do not overload the relay outputs over the indicated limits. It is necessary to give the outputs the suitable protection against the short circuits and overloads.
Electrical connections Example of typical application
13
ELECTROMECHANICAL CHARACTERISTICS Case:
plastic black (PPO), self-extinguishing ABS according with UL 94 V-0.
Size:
72 x 144 x 79 mm (2.83 x 5.66 x 3.11 ").
Installation:
panel mounting, panel cutout 67 x 138 mm (2.63 x 5.43 "), with equipped screw brackets.
Frontal protection index:
IP 54.
Connections:
extractable screw terminal blocks with pitch 5 mm (0.19 ", inputs) and pitch 7.5 mm (0.29 ", power supply and outputs) for cables up to 2.5 mm².
Environment temperature:
from 0 to +60 °C (10 ... 90 % of relative humidity).
Power supply:
220 Vac, 50/60 Hz, 4 VA.
Insulation class:
II (only the models powered in ac).
Alarm buzzer:
included.
Measure inputs:
3 (cabinet, evaporator and needle probe) for PTC probe.
Digital inputs:
2 (5 V, 1 mA), door-switch and locking, configurable to interact with the outputs activity and for NO or NC contact.
Working range:
from -50 to +150 °C.
Setting range:
from -55 to +99 °C.
Timer setting range:
from 1 to 400 minutes for the quick-cooling/freezing for temperature and from 0 to 999 minutes for the quick-cooling/freezing for time.
Resolution:
1 °C.
Display:
two 3-digit display 12,5 mm (0.49 ") high red LED display with automatic sign, programming status indicators. 4 relays of which one 16 (2) @ 250 Vac relay for one 1½ HP @ 250 Vac compressor management
Outputs:
(NO) and three 6 (2) A @ 250 Vac relays for evaporator fans (NO), defrost system (change-over) management and cabinet light control (NO).
14
Kind of defrost managed:
electrical, hot gas and air (automatic and manual).
Defrost management:
interval, cut off temperature and maximum length.
EVCO S.r.l. Via Mezzaterra 6 32036 Sedico BELLUNO ITALY PHONE: +39 0437 852468 FAX: +39 0437 83648 INTERNET ADDRESSES: e-mail: info@evco.it http://www.evco.it