EVCO EC6294 User Manual

Ec 6-294

EC 6-294

ON-OFF digital controller for one 1½ HP

compressor, evaporator fans, defrost (for tem-

perature-time), cabinet light and ON-OFF out-

puts management

Operating instructions
Version 1.00 of November the twenty-ninth 2002
File ec6294e_v1.00.pdf
PT
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 6-294 is an ON-OFF digital controller studied for refrigerating systems management which

basic characteristics are the one 1½ HP compressor, evaporator fans, defrost (for tempera-

ture-time), cabinet light and ON-OFF outputs management and the “ON STAND-BY” key; be-

sides, 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 cabinet light output

to the status ON, etc.).
In factory the instrument gets preset to accept at the measure inputs PTC/NTC probes used in

refrigeration field at the moment.
EC 6-294 is available in the 106 x 90 mm (4.17 x 3.54 in., 6 DIN modules) case and it is studied

for DIN standard rail installation.

GETTING ST

GETTING STAR

ARTED

TED

INSTALLATION
EC 6-294 was studied for DIN EN 50022 standard rail installation according with DIN 43880

norms (the overall dimensions are related in Fig. 3, the fixing system suggested by the builder

is related in Fig. 4).
ADDITIONAL INFORMATIONS
-

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.

ELECTRICAL CONNECTION
EC 6-294 is provided with three screw terminal blocks for cables up to 2.5 mm² (0.38in.², for

the connection to the power supply, inputs and outputs) located on the instrument frontal

panel (the connections to derive are related in Fig. 5 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 85 and 87 are derived to the local power supply, even if the instrument is

apparently turned off

if the instrument is supplied from low voltage use low voltage loads

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

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).

Fig. 1

f6-294.wmf

USE

PRELIMINARY INFORMATIONS
After derived the connections related in Fig. 5, the instrument reproposes the last settings

stored.

Fig. 2

iu6294.wmf

Keeping pushed for two seconds at least the key T4 the instrument turning ON (status ON) or

turning OFF (status STAND-BY), except during the working setpoint setting and the configura-

tion parameters setting procedures; the LED L4 is associated to the instrument status, it is

turned ON during the status STAND-BY and it is turned OFF during the status ON.
During the status STAND-BY the display is turned OFF and all outputs are forced to the status

OFF.
During the status ON, in the course of the normal functioning the instrument displays the

temperature read by the cabinet probe: 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 6-294 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 1A is associated to the compressor and to the working setpoint, it remains

activated continuously as long as the temperature read by the cabinet probe reaches the work-

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

which the instrument presents a request of a defrost cycle, if the conditions permit it (the

temperature read by the evaporator probe must be below the defrost stopping setpoint) the

instrument automatically presents the following request of a defrost cycle.
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 2A 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.
The output K 3A is associated to the cabinet light: pushing and releasing the key T5 the output

DIMENSIONAL DA

DIMENSIONAL DAT

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

Fig. 3

ds66me.wmf

INST

INSTALLA

ALLA

ALLATION

TION

WITH THE FIXING SYSTEM SUGGESTED BY THE BUILDER
On DIN EN 50022 standard rail according with DIN 43880 norms (third-scale drawing).

Fig. 4

ms66m.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. 5

c6-294e.wmf