Atex ECO 6 Operating manual

ECO 6 –User and installation manual
Release 5.1 1

ECO 6 –User and installation manual
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Safety page 03
Technical features page 05
Installation page 08
Cooling page 11
Defrost page 13
Evaporator fan page 18
Condenser fan page 19
High Pressure alarm page 21
Auxiliary functions page 22
Humidity control page 24
Off & Clean page 25
Energy Saving page 25
Temperature alarms page 26
FSC module page 29
Superparameters page 30
Parameters page 32

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Keep this book in a place easy to consult.
Do not power the controller before and during any mechanical or electrical intervention. Inside there are
parts under high voltage that may persist after disconnecting the device from the mains.
There are no parts inside the controller that can be used by the user.
ATEX controllers do not provide for any protection of the loads connected, therefore they must be
protected against short circuits, overcurrents or overvoltages and in temperature with the use of
protective devices suitable for the purpose such as fuses, magnetothermal switches, etc.
Failure to comply with safety standards during installation, such as failure to observe the instructions in
this instruction manual, could reduce the safety level of our controllers.
ATEX controllers have a degree of immunity to electromagnetic disturbances in compliance with EEC
directives. To reduce the causes of radiated or conducted type disturbances that could propagate through
the probes, the loads and the power supply of the controller, cabling the wires avoiding their passage
adjacent to high current loads or electromagnetic fields.
If temperature probes are in contact with food substances, verify that these comply with the health
regulations for use in the food sector.
In the event that the controllers are used in equipment in which a malfunction could result in a risk
situation for people or animals, adequate safety systems must necessarily be provided that enter into
operation automatically in the event of malfunctioning.

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FLEX

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ECO 6 CONTROLLER
Power Supply
230Vac –50/60Hz
Dimensions
L156 x W87 x H38mm
Logic
Microcontroller
Inputs
N°3 NTC [-49.9, +99.9]°C
N°2 door switch and high pressure switch
Relay outputs
30A-5A-5A-5A-5A-5A
Gates
Nr 2 CANBUS
Sensors
Power Supply
Board Temperature
OREDER CODES:
BT92204100 [WITHOUT HOUSING]
BT92204000 [WITH 9 DIN MODULE HOUSING]

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one board: set address 1
dual board: set address 3
-CAN RES one board: switch 0
-CAN RES dual board: switch 1
The U1-U6 relay outputs are configurable

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Each active relay output is indicated by a red LED.
PRB > probe inputs
-Regular status: the LED lights up every 3 seconds
-Fail status: LED is on
Green and yellow leds indicate the presence of +12V e +3V power supply
For each CANBUS port, the reception and transmission status is indicated by a pair of LEDs.

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The size of the drilling template for the insertion of the display frame varies according to the size of the
selected panel (see reference manuals). The electrical connection between the panel and the controller
must only be carried out using the 4-pin serial cable provided by ATEX. The display panel must be mounted
in a position that is not subjected to shocks, vibrations, splashes of water and in any case where the
temperature and humidity do not exceed the specification values.
The controller must be powered at 230Vac. When inserting fastons or connectors, do not bend the printed
circuit board which could damage or break components. Switch on the power supply for 230 / 110Vac
loads on N = neutral, L = line and PE = ground respecting the positions. The pins of the connectors marked
N are in parallel with each other. The U1-U2-U3-U4-U5-U6 pins report the input phase when the
respective relays are enabled. Using the RL1 - RL6 parameters, the outputs can be configured according
to the required action described in the table on page 9. The board can be fastened using plastic spacers
or using the fixing hooks using the 9 DIN modules support that can be supplied on request.
The TOP_FOOD controller board installed on the refrigerating unit and connected to ATEX test systems
via CANBUS allows direct load control and parameter configuration.
CODE
TYPE
APPLICATION
BT92007012
CONN. CPM 4P 3P81
USCITA CAVO 90°
DIGITAL INPUTS
BT92007013
CONN. CPM 6P 3P81
USCITA CAVO 90°
NTC PROBES

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Install the NTC thermostat probe in a position not subjected to airflows in order to be able to
measure the actual temperature of the refrigerated compartment. The NTC probe is enabled by
IS1 parameter; to connect the NTC probe to the board use a 6-pin male connector, 3.81 step. OF1
parameter is dedicated to the calibration of the S1 thermostat probe.
Position the defrost-end evaporator probe between the lamellar pack fins in order to obtain a
sufficient temperature detection sensitivity. For refrigerating units with electric defrosting, the
probe must be positioned at the beginning of the circuit and locked in contact with the evaporator
pack tube by bending the aluminum slats around the probe bulb. For the groups with hot gas
defrost the probe must be positioned at the outlet of the circuit and locked in contact with the
evaporator pack pipe. To connect the NTC probe to the board use a 6-pin male connector, 3.81
step. OF2 parameter is dedicated to the calibration of the S2 evaporator probe.
Fix the condenser probe with a clamp on the condenser outlet tube. To connect the NTC probe to
the board use a 6-pin male connector, 3.81 step. OF3 parameter is dedicated to the calibration of
the S3 condenser probe.
The digital input D1 is dedicated to the micro-switch door, observing the configurable contact n.o.
or n.c.. To connect the micro-switch cables to the board, use a 2-pin or 4-pin male connector, 3.81
step.
The digital input D2 is dedicated to the high pressure switch, observing the configurable contact
n.o. or n.c... To connect the pressure switch cables to the board, use a 2-pin or 4-pin male
connector, 3.81 step.

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Actions of the relay outputs can be configured through the parameters RL1-RL7 with reference to the
values shown in the following table and respecting the maximum current admitted on each output.
ACTION
ID
COOLING
01
DEFROST
02
EVAPORATOR FAN
03
CONDENSER FAN
04
LIGHT
05
HEATING
06
DOOR RESISTOR
07
WATER DRAIN
08
REMOTE ALARM N.C. NOT SILACYABLE
09
REMOTE ALARM N.C. SILACYABLE
10
REMOTE ALARM N.O. NOT SILACYABLE
11
REMOTE ALARM N.O. SILACYABLE
12
DELAYED COMPRESSOR
13
DEFROST_2
14
DEFROST VALVE
21
DRYING RESISTOR
22
SWIVEL PLATE
23
ACTIVE LOAD
24
DEFROST VALVE ACCORDING TO COMPRESSOR
25
RECIRCULATION FAN (only with FLEX panel)
36

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It is the main operating mode for maintaining the coldroom temperature at the set set. The regulation is
of the upper and lower band type with reference to the set and to the HYH and HYL regulation differentials
with reference to the relay configured with action 01. The compressor stop will occur when the value
measured by the probe S1 has reached the value [SPU - HYL ]°C and time DAC expired. The compressor
will restart when the value measured by probe S1 has reached the value [SPU + HYH]°C. The ADL
parameter prevents close starts of the compressor during the thermostatic cycles. The parameter ASS
defines the starting delay time of the compressor at start-up. For HYH = 0 the controller actions are
stopped
The hourly compressor operating time percentage is calculated from the pull-down and recovery
phases after defrost. The value is stored in volatile memory so that a shutdown of the controller
will reset the value.
The compressor operating hours with hourly resolution are stored. The data is converted and
displayed on the display in working hours.
If the compressor operating percentage calculated within 24 hours exceeds the value defined by
the CPH parameter, the COMPRESSOR USE warning is shown on the display; the event is not
recorded and the adjustment does not change. The cancellation of the message coincides with
the silence of the buzzer.

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This is the criterion used in case the failure of the thermostat probe S1 occurs before the
calculation of the average compressor operating times; therefore the times refer to the
parameters CON (compressor switch-on minutes) and COF (compressor pause minutes). In this
temporary operating mode the set temperature can not be controlled with the required accuracy.
This is the criterion used when the failure of the thermostat probe S1 occurs when the evaporator
calibration data are not yet available. The temperature is controlled with the average compressor
switch-on and switch-off times previously calculated. In this condition the maintenance of the
temperature is sufficiently assured if the conditions of loading, of ambient temperature do not
change and frequent door openings do not intervene.
This is the criterion used in case the failure of the thermostat probe S1 occurs in the presence of
the calibration data. Temperature control is transferred to the evaporator probe ensuring that
the setpoint temperature is maintained even in case of door openings or load changes

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The controller manages several defrost types according to the DOP parameter with reference to the
relay configured with action 02: defrost by stop, electric defrost, hot gas defrost.
The defrost by stop forces the shutdown of the compressor and activates the evaporator fans
until the end defrost conditions are reached; this configuration usually does not require the use
of the evaporator probe and the term occurs with reference to the DT1 time. From the keyboard
it is possible to interrupt the action in progress when the defrost is started manually.
The electric defrost switches off the compressor by activating the defrosting resistance until the
condition S2> DTE is reached or the DTO time has elapsed. From the keyboard it is possible to
interrupt the action in progress when the defrost is started manually.
The hot gas defrost turns the compressor on and activates the solenoid valve until the condition
S2> DTE is reached or the DTO time has elapsed. From the keyboard it is possible to interrupt the
action in progress when the defrost is started manually.
Defrosts can be started immediately or at the end of the cycle; in the latter condition, if the compressor
cycle does not end within 15 minutes from the request, defrosting is always started, provided that the
condition S2 <DTE is verified.
INHIBITIONS
A defrost request, with the exception of the defrost protection, is denied if, in at least one of the last
three cycles of thermostat control of the machine, the condition S2> [DTE + 1] ° C has occurred. This in
order to inhibit defrosting almost useless because in such conditions the evaporator can not be
packaged with ice.
The criterion is enabled if the conditions are met:
- Evaporator probe S2 present and not faulty
- reached the first setpoint from the start
Instead it is disabled in configuration with double defrost.

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Manual defrosts can be activated from the keypad on the appropriate menu.
Defrosts occur every ITD hours of operation. The start of the defrost can take place immediately
or at the end of the compressor cycle according with the DOP superparameter.
Defrosts occur every ITD hours of compressor run. The start of the defrost can take place
immediately or at the end of the compressor cycle.
The time defrosts can be at most four starting at SD1, SD2, SD3 SD4. The start of the defrost can
take place immediately or at the end of the compressor cycle coherently according with the
settings.
Energy defrost with end defrost temperature increased by +5°C compared to the ordinary one
and activated by the Off & Clean function when the cooling unit is switched off.
The Automatic Defrosting algorithm is a system for detecting the presence of frost on the
evaporator. The use of automatic defrosting requires the presence of two temperature probes:
thermostat probe and one in contact with the evaporator. Switch door installed is recommended.
The parameter SDT represents the sensitivity for the detection of ice on the lamellar
pack and the consequent start of defrosting:
Recommended values:
• SDT = 1.5 for low-temperature refrigerators
• SDT = 1.1 for positive temperature refrigerators
In any case, we recommend testing the equipment to correctly set the ice sensitivity.
For situations of a particularly packaged evaporator, for example due to repeated door
openings, a protective defrost was started
See par 7.4

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The following modes refer to the FOP parameter:
−Forced on: indicated for defrost at compressor stop
−Forced off: indicated for all other types of defrost
−Modulated by FSD: for all types of defrost, excluding defrost by compressor stop, where a
better defrosting efficiency is required.
In this case the evaporator fans will follow the following criteria based on the FOP parameter:
Absolute fan set: Fan OFF: S2> = FSD; Fan ON: S2 <FSD-HFF
Setpoint fan setpoint: Fan OFF: S2> = SPU + FSD; Fan ON: S2 <SPU + FSD-HFF
Acccording to the FOP parameter the condenser fans can be forced on, off or modulated with reference
to the FCE parameter. In this case the condenser fans during defrosting follow the following rule:
Fan OFF: S3<=FCE; Fan ON: S3>FCE+HYF
When the temperature DE1, read by evaporator probe, is reached the controller ends the defrost phase.
From this moment the controller activates or not the dripping phase according to the value of DRP
parameter: DRP = 0 implies the jump of dropping phase DRP> 0 implies its execution for DRP seconds.
Once the dripping phase is completed, the compressor is enabled. The evaporator fans will start when the
S2 probe is lower than the temperature defined by the FAS parameter in order not to introduce hot air
into the coldroom. If the probe S2 is not installed or faulty, the evaporator fans will start after FAD seconds
from the compressor start.
In refrigeration cabinets with double evaporator probe installed, the defrosting term occurs when
both probes have reached the defrost temperature end defined by DE1 parameter. For this
condition the S3 NTC input must be configured as the second evaporator probe. The management
of dripping and protection time-out follows the previous criteria specified.
If defrost temperature end DE1 is not reached by S2 probe in DT1 minutes, a warning is given on the
display and the event is recorded in Fault List. If the probe S2 is not installed, the DT1 value represents
the defrost end time.

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If the PDD parameter is set higher than 0, the defrost start when the temperature has reached (SPU-PDD)°C.
In refrigerators with a double evaporator (ice cream display cabinets) the defrosts on the first and second
evaporator must be managed separately according to the specified methods. Input S3 NTC can therefore
be configured as a second evaporator probe (IS1 superparameter) which detects the start defrost 2 only
if temperature S3 <DE2 and ends defrosting for S3>=DE2. DT2 parameter defines the time-out defrost of
the 2nd evaporator, after which the defrost action 2 ends even if S3<=DE2 with sending the relative fault
status. In case of probe S3 disabled or faulty, the duration of the second defrost is DT2 minutes; dripping
time is decreased by the end of the most long-lasting defrost or, in the case of defrost in cascade, the
dripping time of the 2nd defrost is equal to the first with independent timer. The DRE parameter (0-10)
defines the start defrost mode 2 in the following three cases:
Set DRE=0: the defrost on the 2nd evaporator starts at the end of the first defrost. The term means
the closure of the action 2 without waiting for the dripping time to expire.
Set DRE=1: at each defrost request, both the defrost on the first evaporator and on the 2nd
evaporator are activated. In the configuration with hot gas defrost the first defrost remains active
as long as the second one is not finished. In the configuration with electric defrost the first defrost
closes when the DE1 evaporator temperature is reached or when maximum DT1 time is reached,
regardless of the status of the 2nd defrost.
Set DRE>0: in this condition the DRE parameter defines how many main defrosts the secondary
one takes which starts synchronously with the first one. In the configuration with hot gas defrost
the first defrost remains active as long as the second one is not finished. In the configuration with
hot gas defrost the first defrost remains active as long as the second one is not finished. In the
configuration with electric defrost the first defrost closes when the DE1 evaporator temperature
is reached or when maximum DT1 time is reached, regardless of the status of the second defrost.

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Thermal protection is enabled if the following conditions are met:
−Function enabled by the OS1 parameter weight 32
−S1 and S2 probes present and not faulty
−S2 probe configured as evaporator probe
−U2 relay configured with defrost action [02]
−Reached the first setpoint from the power-on
If the following conditions are detected during operation:
−[S2-S1]> 25°C with SPU> = 0°C
−[S2-S1]> 50°C with SPU <0°C
the THERMAL PROTECTION WARNING is generated and the controller operation changes
according to the type of defrost. If, with warning of active thermal protection and forced
compressor on (in case of electric defrost), the condition S2 <LBT ° C is reached, or if at any time
the authorization criteria are no longer satisfied, the warning stops and the controller resumes to
regulate as usual.
The outputs associated with the following actions are forced off:
defrost, evaporator fans, light, heating action, door resistance, condenser drain, humidification
and dehumidification.
The outputs associated with the following actions are forced on:
cooling, condenser fans
The outputs associated with the following actions are forced off:
cooling, defrost, evaporator fans, light, warm action, door resistance, condenser drain,
humidification and dehumidification.
The output associated with the condenser fan action is forced on

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In this configuration, defined by FOP parameter, with reference to the relay configured with action 03,
the evaporator fans will have consent only with the compressor on. Otherwise they will remain disabled.
In addition to the main consent, the evaporator fans are subject to the following conditions:
Fan ON for S2 <= FAS; Fan OFF for S2> = [FAS + HFF];
FAS parameter represents the fan ignition temperature
During the defrost phase the criteria defined by the FOP parameter are observed.
−Enabled when the FAD has expired
−According to the compressor during thermostat phase
−During defrost phase the criteria defined by the FOP parameter will be observed.
In this configuration, defined by FOP parameter, the evaporator fans will have consent only with reference
to the condition:
Fan ON for S2 <= FAS; Fan OFF for S2> = [FAS + HFF]
The evaporator fans will remain on until the FAD has expired when the controller is switched on
During the defrost phase the criteria defined by the FOP parameter are observed.
In case of door opening the evaporator fans are stopped for DOO seconds after which they resume
operation regardless of the status of the door switch. When the door is again closed, the evaporator fans
start after 10 seconds.
If is reached the condition S2 <LBT a defrost phase is forced. If the recovery phase of temperature, after
the forced defrost, intercepts again the condition S2 <LBT, three thermostatic modes are used: with
reference to the calibration data, with average compressor times, with CON / COF times. In this condition
the controller will record the event in the Failure List. The cancellation occurs by switching off and
restarting the controller. If the temperature recovery phase leads to reaching the set with S2> LBT, then
the regulation will take place normally and the fault condition will not be generated.

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The condenser fans are thermostated during the cooling action with the following criteria and with
reference to the relay configured with action 04:
Off: S3 <= FCE; On: S3> [FCE + HYF]°C
Off after 10 seconds from compressor off
In case of S3 probe faulty or disabled, the condenser fans replicate the operation of the
compressor while in defrosting follow the criteria defined by the FOP parameter.
Off: S3 <= FCE; On: S3> [FCE + HYF]°C
During defrosting, the condenser fans can be configured on, off or thermostated according to FOP
parameter.
In case of S3 probe faulty or disabled, the condenser fans replicate the operation of the
compressor while in defrosting follow the criteria defined by the FOP parameter.
If the temperature read by S3 condenser probe exceeds the temperature value defined by the
MCT parameter, all the outputs are turned off except for the condenser fan which is forced on.
The automatic reset occurs as soon as the temperature read by the S3 probe falls below the value
[MCT-DCR]°C. The RMT parameter represents the maximum time allowed for the automatic reset
above which the controller records the HIGH CONDENSATION event and notifies to display. In this
condition the reset must be done switching the thermostat off and on again.

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If, within a TBP minute, a PMT number of events described is counted, to the next one, the reset
will be manual: the reset of the regulation will be turned off and on the controller, provided that
the condition [MCT-DCR]°C is verified at power-on. The notification of the fault follows the rules
described in the previous paragraph.
The fault is canceled by turning the thermostat off and then on again.
The presence of impediments on the condenser such as grease and dust accumulated over time
leads to increase the value of the differential condenser temperature. The condenser differential
temperature is calculated each time the compressor is switched on. If the average value of the
thermal jump, purified from the peak values, is greater than or equal to the value of the DCN
parameter, the CONDENSER WARNING is notified to display.
−S3 condenser probe not installed (FCE = 50 ° C) or in fault
−First compressor cycle after switching on, after defrosting and after opening the door;
−Maximum condenser temperature lower than the value (FCE + 15°C).
The warning is clear by pressing the confirm key on the keypad.