EVCO EC3195 User Manual

Ec 3-195

EC 3-195

ON-OFF digital thermostat for compressor,

evaporator fans and defrost (for temperature-

time) management with “Real Time Clock”

function

Operating instructions
Release 2/00 of July the twenty-first 2000
Code EC 3-195 DOC E002
File 3195e.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.

ENGLISH

GENERAL INFORMA

GENERAL INFORMATIONS

TIONS

WHAT IS THE USE
EC 3-195 is an ON-OFF digital thermostat studied for refrigerating systems management through

the compressor, evaporator fans and defrost (for temperature-time) management; besides,

the instrument is provided with one multifunction digital input configurable to interact on the

outputs activity (it presents a request of a defrost cycle, it forces the compressor output to the

status ON, etc.) and with the “Real Time Clock” function (it is studied to establish the real hour

and minute of the day) that can be used to plan up to six daily defrost cycles and to program

working temperature changes (Energy Saving cycle).
In factory the instrument gets preset to accept at the measure inputs PTC/NTC probes used in

refrigeration field at the moment.
EC 3-195 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 ST

GETTING STAR

ARTED

TED

INSTALLATION
EC 3-195 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 internal

overheating of the instrument

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

pets, covers, etc.), heating sources (radiators, hot air ducts, etc.), locations sub-

ject 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 3-195 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, inputs and outputs) and it is provided with one five poles

single line male connector (for the connection to the CLONE configurer/cloner and RICS su-

pervision systems), 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 con-

dense 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 directly

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 7 and 8 are derived to the local power supply, even if the instrument is appar-

ently turned off

give the probes a protection able to insulate them against possible contacts with

metal parts or use insulated probes

give the outputs a protection able to protect them against short circuit and overload

Fig. 1

f3-195.wmf

Fig. 2

iu3195.wmf

If an alarm should be active the instrument displays the alarm code flashing and the buzzer

utters an intermittent beep as long as the cause that has given it does not disappear (see the

chapter SIGNALS AND ALARMS); pressure on the key T1 during an alarm permits to silence

the buzzer.
EC 3-195 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 and a dripping.
The output K 2 is associated to the evaporator fans and it is forced to the status ON, except

what established with the parameters of the family F.
If the instrument was set to manage defrost interval count passed the defrost interval, if the

conditions permit it (the temperature read by the evaporator probe must be below the defrost

stopping setpoint) the instrument automatically presents a request of a defrost cycle, if the

instrument was set to manage real time defrost the instrument automatically presents a re-

quest of a defrost cycle at every time established with the parameters of the family Hd, accord-

ing with the real hour and minute established with the label rtc.
A defrost cycle provides three phases (defrost, dripping and evaporator fans stoppage) con-

nected in cascade since the end of one automatically determines the passage to the following

one.
The output K 3 is associated to the defrost and it remains continuously activated during the

defrost as long as the temperature read by the evaporator probe reaches the defrost stopping

setpoint when the defrost ends and the instrument automatically moves to the dripping; if the

instrument was set to manage defrost to resistances (electrical) during a defrost the compres-

sor output gets forced to the status OFF, if the instrument was set to manage hot gas defrost

(reversal of cycle) during a defrost the compressor output remains continuously activated.
Passed the dripping length from the moment of the defrost end the instrument automatically

moves to the evaporator fans stoppage; during a dripping the compressor output gets forced

to the status OFF.
Passed the evaporator fans stoppage length from the moment of the dripping end the defrost

cycle ends; during an evaporator fans stoppage the evaporator fans output activation gets

disabled.
If the conditions permit it (the temperature read by the evaporator probe must be below the

defrost stopping setpoint) keeping pushed the key T2 for four seconds at least the instrument

presents a request of a defrost cycle.
To the time established with the parameters of the family Hr, according with the real hour and

minute established with the label rtc, the instrument activates an Energy Saving cycle; during

an Energy Saving cycle the compressor output is associated to the auxiliary setpoint, it re-

mains activated continuously as long as the temperature read by the cabinet probe reaches the

auxiliary setpoint and when it rises above the auxiliary setpoint of the hysteresis value (differ-

ential) the output gets reactivated, except during a defrost and a dripping.

DIMENSIONAL DA

DIMENSIONAL DAT

OVERALL DIMENSIONS AND PANEL CUTOUT
The dimensions are expressed in millimetres and inches (third-scale drawing).

Fig. 3

ds3ve.wmf

INST

INSTALLA

ALLA

ALLATION

TION

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

ms3vv.wmf

Fig. 5

ms3vm.wmf

ELECTRICAL CONNECTION

CONNECTIONS TO DERIVE
Instance of typical application.

BUILDER DA

BUILDER DAT

EVERY CONTROL S.r.l.
Via Mezzaterra 6, 32036 Sedico Belluno ITALY
Phone 0039/0437852468 (a.r.) Fax 0039/043783648
Internet addresses
e-mail: [email protected]
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. 6

c3-195e.wmf

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.