EVCO EC3L20 User Manual

DIMENSIONAL DATA

OVERALL DIMENSIONS AND PANEL CUTOUT

The dimensions are expressed in millimetres and inches (third-scale drawing).

EC 3-L20

ON-OFF digital thermostat for compressor

and defrost (by stopping compressor) man-

agement supplied from main voltage

ENGLISH

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INSTALLATION

WITH THE FIXING SYSTEMS SUGGESTED BY THE BUILDER

Panel mounting, with the equipped screw (Fig. 4) or spring brackets (Fig. 5) (third-scale drawing).

Fig. 4

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Fig. 5

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ELECTRICAL CONNECTION

CONNECTIONS TO DERIVE

Instance of typical application.

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BUILDER DATA

EVERY CONTROL S.r.l.

Via Mezzaterra 6, 32036 Sedico Belluno ITALY

Phone [phone] (a.r.) Fax [phone]

Internet addresses

e-mail: [e-mail]

http://www.everycontrol.it

TO BE CAREFUL

This publication exclusively belongs to EVERY CONTROL and shall not be reproduced and distributed if not expressly authorized by the same EVERY CONTROL.

EVERY CONTROL does not assume any responsibility in order to the characteristics, to the technical data and to the possible mistakes related herein or deriving from the use of the same.

EVERY CONTROL can not be considered responsible for damages caused from the inobservance of the additional informations.

EVERY CONTROL reserves the right to make any modification without prior notice and at any time without prejudice the basic functioning and safety characteristics.

Fig. 3

Fig. 6

Operating instructions

Release 1/00 of February the twenty-ninth 2000

Code EC 3-L20 DOC E001

File 3l20e.p65

IMPORTANT:

The use of this new instrument is easy; but for safety reasons, it is

important read these instructions carefully before the installation or

before the use and follow all additional informations.

It is very important keep these instructions with the instrument for future

consultations.

GENERAL INFORMATIONS

WHAT IS THE USE

EC 3-L20 is an ON-OFF digital thermostat studied for refrigerating systems management through

the compressor and defrost (by stopping compressor) management; the instrument can be

supplied from main voltage (230 Vac).

In factory the instrument gets preset to accept at the measure input NTC probes used in

refrigeration field at the moment.

Some parameters permit to set the thermostat to protect the compressor against overloads

due to several starts repeated in a short time, to manage the defrost according with ones

requirements.

EC 3-L20 is available in the 74 x 32 mm (2.91 x 1.25 in.) case and it is studied for panel

mounting with the equipped screw or spring brackets.

GETTING STARTED

INSTALLATION

EC 3-L20 was studied for panel mounting, panel cutout 71 x 29 mm (2.79 x 1.14 in.), with the

equipped screw or spring brackets (the overall dimensions and the panel cutout are related in

Fig. 3, the fixing systems suggested by the builder are related respectively in Fig. 4 and in

Fig. 5).

ADDITIONAL INFORMATIONS

- the panel thickness must be included from 1 to 5 mm (0.04 to 0.19 in.)

- verify if the using conditions (ambient temperature, humidity, etc.) are within the

limits indicated by the builder (see the chapter TECHNICAL DATA)

- install the instrument in a location with a suitable ventilation, to avoid the inter-

nal overheating of the instrument

- do not install the instrument near surfaces that can to obstruct the air-grating

(carpets, covers, etc.), heating sources (radiators, hot air ducts, etc.), locations

subject to direct sunlight, rain, humidity, excessive dust, mechanical vibrations

or bumps, devices with strong magnetos (microwave ovens, big speakers, etc.)

- according with the safety norms, the protection against possible contacts with

electrical parts and parts protected with functional insulation only must be ensured

through a correct installation procedure of the instrument; all parts that ensure

the protection must be fixed so that they can not be removed if not with a tool

- if not differently specified at the time of order, the instrument will be equipped

with screw brackets.

ELECTRICAL CONNECTION

EC 3-L20 is provided with two screw terminal blocks for cables up to 2.5 mm² (0.38 in.², for the

connection to the power supply, measure input and output), located on the instrument back

panel (the connections to derive are related in Fig. 6 and they are checkable on the polyester

label stuck on the instrument case).

ADDITIONAL INFORMATIONS

- if the instrument is brought from a cold to a warm location, the humidity may

condense inside the instrument; wait about an hour before supply the instrument

- verify if the operating power supply voltage, electrical frequency and power of

the instrument correspond to the local power supply (see the chapter TECHNICAL

DATA)

- do not supply more instruments with the same transformer

- if the instrument is installed on a vehicle, its power supply must be derived di-

rectly from the battery of the vehicle

- give the instrument a protection able to limit the current absorbed in case of

failure

- the instrument remains connected to the local power supply as long as the termi-

nals 1 and 2 are derived to the local power supply, even if the instrument is appar-

ently turned off

- the probe is connected to a main voltage terminal; use double insulation probes

- give the output a protection able to protect it against short circuit and overload

- do not try to repair the instrument; for the repairs apply to highly qualified staff

- if you have any questions or problems concerning the instrument please consult

Every Control (see the chapter BUILDER DATA).

USE

PRELIMINARY INFORMATIONS

After derived the connections related in Fig. 6, during the normal functioning the instrument

displays the temperature read by the cabinet probe.

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If an alarm should be active the instrument displays the alarm code flashing as long as the

cause that has given it does not disappear (see the chapter SIGNALS AND ALARMS).

EC 3-L20 is provided with one working setpoint and with some configuration parameters that

get stored in a non volatile memory and that permit to set the instrument according with ones

requirements (see the chapter CONFIGURABILITY).

The output K 1 is associated to the compressor and to the working setpoint, it remains acti-

vated continuously as long as the temperature read by the cabinet probe reaches the working

setpoint and when it rises above the working setpoint of the hysteresis value (differential) the

output gets reactivated, except during a defrost.

Passed the defrost interval from the moment of the instrument start or from the moment in

which the instrument activates a defrost the instrument automatically activates the following

defrost.

Passed the defrost length from the moment in which the instrument activates a defrost the

defrost ends; during a defrost the output K 1 gets forced to the status OFF.

Keeping pushed the key T2 for four seconds at least the instrument activates a defrost.

WORKING SETPOINT SETTING (WORKING TEMPERATURE)

To modify the working setpoint value keep pushed the key T3 (the instrument displays the

actual value) and at the same time push and release over and over the key T1 or T2 as long as

the instrument displays the desired value (keeping pushed the key T1 or T2 the value gets

decreased or increased more quickly): after the modification release the key T3 last; during the

pressure of the key T3 the LED L1 flashes quickly to indicate that a working setpoint setting

procedure is running (to the release of the key T3 the instrument automatically turns out from

the working setpoint setting procedure).

ADDITIONAL INFORMATIONS

- for the whole period of a corrupted memory data alarm the access to the working

setpoint setting procedure is refused

- the working setpoint is programmable within the limits established with the param-

eters r1 and r2

- the working setpoint value gets stored in a non volatile memory even if a lack of

power supply happens.

CONFIGURATION PARAMETERS SETTING

Keep pushed at the same time for four seconds at least the keys T1 and T2 (passed four

seconds the instrument displays the label /1).

To select a parameter push and release over and over the key T1 or T2 as long as the instru-

ment displays the label of the desired parameter.

To modify the parameter value keep pushed the key T3 (the instrument displays the actual

value) and at the same time push and release over and over the key T1 or T2 as long as the

instrument displays the desired value (keeping pushed the key T1 or T2 the value gets de-

creased or increased more quickly); after the modification release the key T3 last (to the

release of the key T3 the instrument displays the label of the parameter again).

To turn out from the configuration parameters setting procedure keep pushed at the same time

for four seconds at least the keys T1 and T2 or do not operate with the keys for fifty seconds

14

at least (time-out exit).

Fig. 1

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Fig. 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

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-

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

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-

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.

WORKING SETPOINT AND TO THE OUTPUT K 1

ment start

deactivation

vation

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

- 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.),

Type of protection: IP 54.

Connections: screw terminal blocks with pitch 5 mm (0.19 in., power

Ambient temperature: from 0 to +60 °C (+32 to +140 °F, 10 ... 90 % of not con-

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

Outputs: one change-over contact 8 (3) A @ 250 Vac relay for one

Kind of defrost managed: by stopping compressor, automatic and manual.

Defrost management: for interval and length.

with the equipped screw or spring brackets.

supply, measure input and output) for cables up to 2.5 mm²

(0.38 in.²).

densing relative humidity).

with automatic minus sign, output status indicator, defrost

status indicator.

½ HP @ 250 Vac compressor management.

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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