EVCO EC3L20 - Manual (Page 2)

ADDITIONAL INFORMATIONS
-
for the whole period of a corrupted memory data alarm the access to the configura-
tion parameters setting procedure is refused
- the modification of a parameter value which unit of measure is the hour or the
minute or the second has not immediate effect; to obtain this effect it must not be
executed during the course of the value
- the configuration parameters values get stored in a non volatile memory even if a
lack of power supply happens.
CONFIGURABILITY
WORKING SETPOINT
LABELMIN. MAX. U.M. ST.
WORKING SETPOINT
r1 r2 ° C 0 working setpoint
It establishes the temperature associated to the output K 1.
CONFIGURATION PARAMETERS
LABEL MIN. MAX. U.M. ST.
MEASURE INPUT
/1 -15 +15 ° C 0 calibration
It establishes a threshold to add algebraically to the signal coming from the measure input (for
instance to correct the signal).
LABEL MIN. MAX. U.M. ST.
ON-OFF TEMPERATURE REGULATOR ASSOCIATED TO THE
WORKING SETPOINT AND TO THE OUTPUT K 1
r0 +1 +15 ° C +2 hysteresis (differential)
It establishes the hysteresis (differential) relative to the working setpoint.
r1
-40 +99 ° C -40 minimum working setpoint programmable
It establishes the minimum working setpoint programmable; the instrument automatically veri-
fies if the value established with the parameter r1 is below the maximum working setpoint
programmable established with the parameter r2.
r2
-40 +99 ° C +99 maximum working setpoint programmable
It establishes the maximum working setpoint programmable; the instrument automatically
verifies if the value established with the parameter r2 is above the minimum working setpoint
programmable established with the parameter r1.
LABEL MIN. MAX. U.M. ST.
OUTPUT K 1 PROTECTION
C0 0 15 min. 0 disabling time to the output activation from the instru-
ment start
It establishes the time that disables the output activation from the moment of the instrument
start.
C2
0 15 min. 3 disabling time to the output activation from the previous
deactivation
It establishes the time that disables the output activation from the moment of the previous
output deactivation.
LABEL MIN. MAX. U.M. ST.
DEFROST REGULATOR
d0 0 99 (*) 8 defrost interval
It establishes the time interval that pass from the moment of the instrument start or from the
moment in which the instrument activates a defrost to the moment in which the instrument
automatically activates the following defrost.
If the parameter d0 has value 0 the instrument never automatically activates a defrost, except
what established with the parameter d4.
d3
1 99 (*) 30 defrost length
It establishes the defrost length.
d4
0 1 --- 0 defrost at the instrument start
It establishes if the instrument automatically must activate a defrost at the moment of the
instrument start, as indicated:
0 = inactive
1 = the instrument automatically activates a defrost at the moment of the instrument start.
d5 0 99 (*) 0 delay to a defrost activation from the instrument start
If the parameter d4 has value 0 it establishes a time interval to add to the interval established
with the parameter d0; the value so obtained establishes the time interval that pass from the
moment of the instrument start to the moment in which the instrument automatically activates
the following defrost.
If the parameter d4 has value 1 it establishes the delay with which the instrument automatically
activates a defrost from the moment of the instrument start.
A manual activation of a defrost during the count of the delay established with the parameter
d5 clears the delay.
d6
0 1 --- 1 locking of the displayed temperature from a defrost acti-
vation
It establishes if to lock the displayed temperature from the moment in which the instrument
activates a defrost, as indicated:
0 = inactive
1 = during a defrost and as long as the temperature read by the cabinet probe reaches the
working setpoint, the instrument displays the temperature read by the cabinet probe in
the moment in which the instrument activates a defrost.
db 0 1 --- 0 times base for the parameters d0, d3 and d5
It establishes the unit of measure of the parameters d0, d3 and d5, as indicated:
0 = the unit of measure of the parameter d0 is the hour and the unit of measure of the
parameters d3 and d5 is the minute
1 = the unit of measure of the parameter d0 is the minute and the unit of measure of the
parameters d3 and d5 is the second.
ADDITIONAL INFORMATIONS
-
the symbol (*) indicates that the unit of measure depends from the parameter db.
SIGNALS AND ALARMS
SIGNALS
If the LED L1 is turned ON it means that the output K 1 is activated.
If the LED L1 flashes it means that a defrost is running.
ALARMS
If the instrument displays the indication “E2” flashing (corrupted memory data alarm) it means
that there is a corruption of the configuration data in the memory (turn OFF and turn ON again
the instrument: if to the turning ON again the alarm does not disappear the instrument must be
replaced); during this alarm the access to the working setpoint setting and the configuration
parameters setting procedures is refused and the output K 1 gets forced to the status OFF.
If the instrument displays the indication “E0” flashing (cabinet probe failure alarm) it means
that: the kind of connected cabinet probe is not proper (verify the kind of connected cabinet
probe), the cabinet probe is faulty (verify the cabinet probe integrity), there is a mistake in the
instrument-cabinet probe connection (verify the instrument-cabinet probe connection integ-
rity), the temperature read by the cabinet probe is outside the limits permitted by the cabinet
probe in use (verify that the temperature near the cabinet probe be inside the limits permitted
by the cabinet probe); during this alarm the output K 1 gets forced to the status OFF, if a defrost
is running the defrost ends and the instrument never activates a defrost.
ADDITIONAL INFORMATIONS
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the alarm codes are related in order of precedence.
TECHNICAL DATA
TECHNICAL DATA
Case:
plastic black (PC-ABS), self-extinguishing.
Size: 74 x 32 x 65 mm (2.91 x 1.25 x 2.55 in.).
Installation: panel mounting, panel cutout 71 x 29 mm (2.79 x 1.14 in.),
with the equipped screw or spring brackets.
Type of protection: IP 54.
Connections: screw terminal blocks with pitch 5 mm (0.19 in., power
supply, measure input and output) for cables up to 2.5 mm²
(0.38 in.²).
Ambient temperature: from 0 to +60 ° C (+32 to +140 ° F, 10 ... 90 % of not con-
densing relative humidity).
Power supply: 230 Vac, 50/60 Hz.
Measure inputs: 1 for NTC probes.
Working range: from -40 a +99 ° C.
Setting range: from -40 a +99 ° C
Resolution: 1 ° C.
Display: 2-digit display 12.5 mm (0.49 in.) high red LED display
with automatic minus sign, output status indicator, defrost
status indicator.
Outputs: one change-over contact 8 (3) A @ 250 Vac relay for one
½ HP @ 250 Vac compressor management.
Kind of defrost managed: by stopping compressor, automatic and manual.
Defrost management: for interval and length.
HOW TO ORDER
CODING SYSTEM
Instrument name:
EC 3-L20.
Desired measure input: N (for NTC probes).
Desired power supply: 220 (230 Vac).
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