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EWDR 983 985, Instrukcje, ELIWELL
[ Pobierz całość w formacie PDF ]EWDR 983-985 /CS (LX)
electronic controllers for ventilated refrigeration units
cod. 9IS43068
rel. 1/05
GB
USER INTERFACE
The user interface has a 6 LED display to
indicate alarm status and five buttons for
controlling instrument status and pro-
gramming.
SIGNAL LED
The status of the external devices, func-
tions and controllers is described by the
device LEDs.
The set point setting folder is also closed
when the time-out elapses.
Alarm on
If an alarm condition exists when the
Machine Status menu is accessed the
“ALfolder label appears.
DISPLAY
This is used to display the inputs, the set
point, the parameters and related values,
alarms, functions and the status of the
device.
Real Time Clock (/C models)
By pressing the “set” button when the
“rtc” label appears, the label d00 (days)
is displayed. Use the “UP” and “DOWN”
buttons to set days. If you do not use
the buttons for over 2 seconds or if you
press “set” you switch to the hours (h00)
and minutes (‘00) folders: use the “UP”
and “DOWN” buttons to set the hours
and minutes respectively. If you do not
use the keyboard for over 15 seconds
(time-out) or if you press the “fnc” but-
ton once, the last value shown on the
display is confirmed and you go back to
the previous screen mask.
NOTE: Always use the “set” button to
confirm the hours/minutes/days set-
ting.
NOTE2: We recommend considering
the first day d00 as SUNDAY.
DESCRIPTION OF MENU
Access to both menus is controlled by
the ‘set’ button. If it is pressed and
immediately released, the ‘machine sta-
tus menu‘ is displayed. Hold the same
button down for 5 seconds to access the
‘parameter programming menu‘.
When one of the two menus has been
accessed, you can navigate between the
level 1 folders using the ‘UP’ and ‘DOWN’
buttons. The folders are opened by
pressing the ‘set’ button once. You can
now scroll through the contents of each
folder, modify it or use its functions.
You can exit each level of both menus in
three ways: using the ‘fnc’ button, if a
new value is confirmed by pressing the
‘set’ button or, when the time-out has
elapsed (15 seconds inactivity on the
device).
BUTTONS AND LEDS
UP
Increase in value of
parameter Menu scrolling
and activation of defrost
function
(Parameter programmable
H31)
DOWN
Decrease in value of
parameter
Menu scrolling and activation
of associated function
(Parameter programmable
H32)
set
Access to different levels of
menu Alarm display, set
point, probes and rtc
Access to programming of
parameters
PARAMETER PROGRAMMING MENU
Access the menu by pressing the ‘set’
button for at least 5 seconds. The menu
structure enables all parameter folders
to be divided into two levels. All the
level 1 folders can be accessed by enter-
ing the password ‘PA1’.
Scroll down the level 1 folders using the
‘UP’ and ‘DOWN’ buttons. Press and
release the ‘set’ button next to the
selected label to access the parameters.
Scroll through the labels in the folder
using the ‘UP’ and ‘DOWN’ buttons,
press ‘set’ to display the current value of
the selected parameter, use the ‘UP’ and
‘DOWN’ buttons and set the required
value by pressing ‘set’. To access the
level 2 folders in the ‘Cnf’ folder, select
the ‘PA2’ label, enter the password ‘PA2’
and confirm with the ‘set’ button. All the
parameters that cannot be changed at
level 1 are in this level.
NOTE: Level 1 parameters will only be
displayed if you quit the ‘parameter
programming menu’ and repeat the
steps for manipulation of level 1 folders.
The steps to follow for manipulation of
level 2 parameters are the same as those
described for the level 1 structure.
NOTE: It is strongly recommended
that the instrument is switched off
and on again each time parameter
MACHINE STATUS MENU
The ‘machine status menu’ contains the
folders and basic information on the
device:
-AL: alarm folder
-SEt: Set point setting folder
-rtc: Real Time Clock folder(if present)
-Pb1: ‘probe 1 value’ folder
-Pb2: ‘probe 2 value’ folder
-Pb3: ‘probe 3 value’ folder
fnc
Exit current level of
menu Confirmation of value of
parameter
(Parameter programmable
H33)
aux
Activation of associated
function using parameter
H34
LED
Description
Indication
If no alarms are present, the “SEt” label
is displayed. From here, you can scroll
down the other menu items using the
UP’ and ‘DOWN’ buttons. Each folder
can be accessed by pressing the ‘set’
button once.
Values are modified using the ‘UP’ and
‘DOWN’ buttons and the ‘set’ button
that confirms the selected value and
takes you back to the higher level.
Setting the set point
Access the ‘machine status menu’. If no
alarms are present, the “SEt” label is dis-
played. By pressing and immediately
releasing the ‘set’ button, the set point
value can be set using the UP’ and
‘DOWN’ buttons. Press and release the
‘set’ button again or press the ‘fnc’ but-
ton to go back to the main menu level.
Reduced set point
Lights up when
inserted LED
set point is
displayed, blinking
when reduced set
point is inserted
LED
‘on’ with compressor
LED on. Blinking
for delay, protection
or activation blocked
defrost LED
‘on’ during defrosting
Blinking when
activated manually
or by digital input
fan LED
permanently on when
fans are operating
alarm LED
‘on’ if alarm is present.
Blinking for silenced
alarm
auxiliary LED
‘on’ for active output
decimal point
‘on’ to indicate of
voltage when on
stand-by and display
‘off’
configuration is changed in order to
prevent malfunctioning of the config-
uration and/or ongoing timings.
Televis remote control systems can be
connected using the RS 485 serial input.
To configure the instrument to do this,
you need to access the folder with the
“Add” label and use the “dEA” and “FAA”
parameters.
Parameter H06 activates the light button
and enables the relay when the door is
open even when the instrument is pow-
ered but is ‘off’. The dedicated button
always deactivates the light relay even if
the digital input is on or during the dLt
delay only if the parameter OFL=Y.
PASSWORD
The passwords “PA1and “PA2” are used
to access level 1 and level 2 parameters.
To change them and assign them the
desired value, access the ‘parameter pro-
gramming menu’ in the “diS” label folder.
ADVANCED FUNCTIONS
DIAGNOSTICS
PROBE ALARMS
When one of the probes is outside the
nominal operating range or the probe is
open or has shorted, an alarm is gener-
ated if at least one of these conditions
persists for at least 10 seconds.
If at least one of these 3 alarms is sig-
nalled the alarm LED and relay are
enabled.
The password is requested:
- PA1 when entering the ‘parameter pro-
gramming menu’;
- PA2 in the “Cnf” folder containing the
level 1 parameters.
DOOR SWITCH INPUT
This is a clean contact digital input with
programmable polarity. The door switch
input functions are controlled by the
values of the following parameters:
Par Description
dOd Digital input switches off loads
dAd
USING THE COPY CARD
The Copy card function can be used to
upload and download parameter maps
of one or more of the same type of
instrument. The accessory is connected
to the device using the special TTL serial
port on the instrument. The Copy card
can be used for the following functions:
Upload (UL)
The upload function reads the instru-
ment parameters and writes them onto
the Copy card
Download(dL)
The download function writes the para-
meter map present at that time on the
copy card onto the instrument memory.
NOTE:
Upload = instrument—-> Copy card
Download = Copy card —-> instrument
The operations are performed by access-
ing the folder with the ‘FPr’ label and
selecting the ‘UL’, ’dL’ or ‘Fr’ com-
mands. The operation is confirmed by
pressing the ‘set’ button. If the operation
is successful, a “y” is displayed whereas if
it is unsuccessful an “n” will be dis-
played.
Formatting the copy card
This function is necessary when using the
copy card for uploading for the first
time or when using the copy card on
device models that are not compatible.
NOTE: formatting deletes all the data
on the Copy card and cannot be
undone. Download from reset
Once the copy card has been connected
the instrument is switched on. When the
lamp test is over, one of the following
two labels will be displayed for 5 sec-
onds:
- dLY if the operation is successful
- label DLn if operation fails The display
will then go into default position (probe
or set point).
NOTE: after downloading the instru-
ment will begin to work with the new
parameter map that has just been
downloaded.
REMOTE CONTROL SYSTEMS
(/CS LX models only)
D.I. activation delay
OAO
Alarm signal delay after disdisabling the
digital input (door closed)
tdO
Time out door open. Time out
signal after activation of D.I.
(door open)
Signal
Description
E1
Faulty room probe
E2
Faulty defrost probe
H11
Digital output configurability/polarity 1
E3
Faulty display probe
H21...H25
Digital output configurability 1...5
When activated code E1 appears on the
display. If several alarms are activated at
the same time, they are displayed alter-
nately for 2 seconds each.
An error condition in the room probe
leads to:
- E1 code appears on display
- activation of compressor as indicated
by Ont and OFt
- deactivation of maximum and mini-
mum alarm controller. An error condi-
tion in the defrost probe leads to:
- E2 code appearing on display
- end of defrost due to a time-out
Parameter H11 is used to configure the
door switch input with values between
-8 and +8. Positive and negative values
are present in order to select the polari-
ty assigned to the input:
NOTE:
the ‘-’ sign indicates that the input is
activated when the contact is closed
The ‘+’ sign indicates that the input is
activated when the contact is open.
LIGHT CONTROLLER
Controls the light relay. The function can
be started in two different ways. If you
press the light button the light relay is
switched on if it was off and is switched
off if it was on. The light status is
recorded by the device as soon as the
button is pressed so that when power is
restored after a black-out the device can
continue to operate in the same way as
before the power failure. The following
parameters control how the light works:
Par
Description
H06
Button/aux input/door switch light active
when instrument off
dSd
Enabling light relay by door switch
dLt
Delay Light Relay deactivation delay
OFL
Light switch always disables light relay
OAO
Alarm signal delay after disabling the
digital input (door closed)
tdO
Time out door open. Time out
signal after activation of D.I.
(door open)
H11
Digital output configurability/polarity 1
H21...H25
Digital output configurability 1...5
The configuration of these parameters
controls the status of the light relay by
using the digital input as well as the nor-
mal button. The parameter dSd automat-
ically switches on the light relay when
the digital input is enabled and switches
it off when the digital input is disabled
following the delay set by parameter dLt.
EWDR 983-985 /CS (LX)
2/11
EXTERNAL ALARM
It is set if the digital input is enabled
with the delay specified by parameter
dAd and remains enabled until the next
time the digital input is deactivated.
The alarm consists of an alarm LED that
remains on, activation of a buzzer and
deactivation of all the device loads (if
specified by the EAL parameter).
If an external alarm is present the EA
label is displayed in the AL folder.
Serial:
-TTL for Copy Card
-RS485 for connection to Televis
System
(for /CS LX models only)
Digital outputs:
EWDR 983 (/CS LX):
2 digital outputs on relay:8A 1/2hp 250V
SPDT; 16A 1hp 250V SPDT;
EWDR 985 (/CS LX):
4 digital outputs on relays: 8A 1/2hp
250V SPST; 8A 1/2hp 250V SPDT; 16A
1hp 250V SPST; 8A 1/2hp 250V SPST.
Configurable 12Vc/24mA output
Resolution: 1 or 0.1°C.
Accuracy: better than 0.5% of bottom
scale +1 digit
Consumption: 5VA
Power supply: 230V
MINIMUM AND MAXIMUM TEMPERA-
TURE ALARM
The alarm is regulated on the room
probe. The temperature limits are
defined by parameters HAL and LAL.
The limits refer to the set point if para-
meter Att=1 and are absolute if Att=0.
Att=0
absolute
Maximum temperature alarm
room probe temperature
≥
HAL
Minimum temperature alarm
room probe temperature
≤
LAL
Signal
Description
EA
External alarm
Att=1
relative
Maximum temperature alarm
room probe temperature
≥
Set + HAL
It is reset the next time the digital input
is deactivated and the buzzer can be
manually silenced.
Minimum temperature alarm
room probe temperature
≤
Set + LAL
NOTE: If the alarms are relative, the
parameter HA1 is set to positive val-
ues and LA1 to negative values.
OPEN DOOR ALARM
This alarm is generated when the door is
open for longer than the value specified
in parameter tdO.
door open alarm is signalled in the
alarm folder (AL) and the LED and alarm
relay are switched on.
The OPd label is also displayed.
a
CLOCK BATTERY ALARM
This alarm is activated in the following
situations:
- when the instrument is switched on for
the first time and the clock is set
- when the instrument is switched on
again after a power off lasting more than
24/32 hours.
ELECTRICAL
CONNECTIONS
Warning! Always switch off machine
before working on electrical connec-
tions.
The instrument has screw terminal blocks
for connecting cables with a maximum
diameter of 2.5 mm
2
(only one conductor
per terminal block for power connec-
tions): for terminal capacity, see the label
on the instrument.
The relay outputs are voltage free.
Do not exceed the maximum current
allowed. For higher loads, use a suitable
contactor.
Make sure that the power voltage com-
plies with the device voltage.
Probes have no connection polarity and
can be extended using an ordinary bipo-
lar cable (note that if probes are extend-
ed this affects the electromagnetic com-
patibility (EMC) of the instrument: special
care must be used when wiring).
The RS-485 serial and TTL serial cables
must be kept separate from the power
cables.
Signal
Description
OPd
Open door alarm
The relay can be deactivated by pressing
the silencing button. The LED continues
to flash intermittently and the OPd label
remains in the alarm menu until the
door is closed.
Signal
Description
E10
Loss of hours with buffer
battery
The alarm will stop as soon as the
day/hour/minutes are set using the set
parameters.
Resetting is automatic and there is no
need to restart the instrument.
MECHANICAL ASSEMBLY
The EWDR 983-985 LX is designed to be
wall-mounted (removable brackets) or
mounted on DIN rail (Omega 3).
The unit operates correctly with an
ambient temperature range of between
-5 and 55 °C. Units must not be installed
in excessively humid and/or dirty loca-
tions.
ALARM WITH THRESHOLD REFERRING
TO PROBE 3
An alarm is associated with probe 3 that
refers to a threshold that is reset at a
specified differential.
By setting parameter PbA=3 probe 3 will
signal a high or low temperature alarm
for exceeding the set value.
TECHNICAL DATA
Casing: plastic 4 Din modules
Dimensions: front 70x85 mm, depth
61mm.
Mounting: on DIN rail (Omega 3) or
wall-mounted.
Connections: on screw terminal block for
≤
2.5mm
2
conductors
(only one conductor per terminal block
for power connections)
Operating temperature: -5...55°C.
Storage temperature: -30...85°C.
Operating and storage ambient humidity:
10...90 % RH (non-condensing).
Display: 3 digits + sign
Analogue inputs: 3 NTC/PTC inputs
(parameter configurable)
Digital inputs: 2 voltage-free parameter-
configurable digital inputs.
Signal
Description
AH3
High temperature alarm
AL3
Low temperature alarm
The alarm is handled in the same way as
the other temperature alarms and stan-
dard signal delays are used.
DEFROST ALARM
If defrosting does not reach the end of
cycle temperature but is terminated by a
time out, the alarm controller is immedi-
ately activated.
An alarm LED remains on and the alarm
is recorded in the Ad2 label alarm menu.
Signal
Description
Ad2
End of defrost due to time
out
The alarm is automatically reset as soon
as the next defrost cycle starts. The
alarm LED can only be manually
switched off with a silencing procedure.
EWDR 983-985 /CS (LX)
3/11
PAR.
DESCRIPTION
RANGE
DEFAULT
VALUE
LEVEL
U.M.
SEt
Set point with range falling between the minimum
LSE set point and the maximum HSE set point. The
value of the set point is in the
machine status
menu
LSE...HSE
0.0
°C/°F
diF
When the compressor stops when it reaches the
set point value, it restarts at a value corresponding
to the set point plus the value of the differential It
must not be 0
0.1...30.0
2.0
1-2
°C/°F
HSE
Maximum set point value
LSE...302
50.0
1-2
°C/°F
LSE
Minimum set point value
-58.0...HSE
-50.0
1-2
°C/°F
OSP
Offset point. Value to be added to set point if
reduced set point is activated Economy function).
-30.0...30.0
0
2
°C/°F
Cit
Minimum compressor ON time. Minimum time for
activating a compressor before deactivation Not
active if=0
0...250
0
2
min
CAt
Maximum compressor ON time. Maximum time for
activating a compressor before deactivation Not
active if=0
0...250
0
2
min
Ont (1)
Compressor activation time if probe is faulty. If set
to 1 with OFt=0 the compressor always remains on
whereas if OFt>0 it operates in duty cycle mode
(see
Duty Cycle
diagram)
0...250
0
1-2
min
OFt (1)
Compressor shut-down time if probe is faulty. If set
to 1 with Ont=0 the compressor always remains off
whereas if OFt>0 it operates in duty cycle mode
(see
Duty Cycle
diagram)
0...250
1
1-2
min
dOn
Delay in activating compressor relay after start-up
0...250
0
1-2
sec
dOF
Delay after shut-down; between compressor relay
shut-down and subsequent start-up the specified
time must elapse.
0...250
0
1-2
min
dbi
Delay between switch-ons; the specified time must
elapse between two subsequent switch-ons
0...250
0
1-2
min
OdO
Delay in activating outputs after start-up of instru-
ment or after a power failure. Not active if=0
0...250
0
1-2
min
dty
Type of defrost.
0 = electrical defrosting;
1 = cycle reversing defrosting (hot gas);
2 = Free mode defrosting (compressor disabled).
0/1/2
0
1-2
flag
dit
Period of time elapsing between the start of two
defrosts 0=function disabled
0...250
6
1-2
hours
dt1
Unit of measurement for defrost times (par. dit)
0=”dit” expressed in hours
1=”dit” expressed in minutes
2=”dit” expressed in seconds
0/1/2
0
2
flag
dt2
Unit of measurement for duration of defrosting
(dEt parameter)
0= “dEt” parameter expressed in hours
1= “dEt” parameter expressed in minutes
2= “dEt” parameter expressed in seconds
0/1/2
1
2
flag
dCt
Selection of defrosting time count mode.
0=compressor operating hours DIGIFROST®
method). Defrosting active only if compressor is
on.
1 = equipment operating hours; defrost counting is
always active when the machine is on
2=compressor stop Each time the compressor stops
a defrosting cycle according to par. dtY
3=con RTC. Defrosting at times set by dE1...dE8,
F1...F8 parameters.
0/1/2/3
1
1-2
flag
dOH
Delay between start of first defrosting operation
and start-up of instrument.
0...59
0
1-2
min
dEt
Defrosting time-out; determines maximum dura-
tion of defrosting.
1...250
30
1-2
min
dE2
Defrosting time-out on second evaporator; deter-
mines maximum duration of defrosting on 2nd
evaporator
1...250
30
2
min
NOTE: At level 1 the folders will only display all the level 1 parameters. At level 2 the folders will only display all the
level 2 parameters. The symbol 1-2 indicates the parameters that are displayed at both menu levels
EWDR 983-985 /CS (LX)
4/11
PAR.
DESCRIPTION
RANGE
DEFAULT
VALUE*
LEVEL**
U.M.
dSt
End of defrost temperature (determined by evapo-
rator probe)
-50.0...150
8.0
1-2
°C/°F
dS2
End of defrost temperature (determined from
probe on 2nd evaporator)
-50.0...150
8.0
2
°C/°F
dPO
Determines when instrument starts up if the
defrosting cycle must be activated (if the tempera-
ture on the evaporator allows this) y=defrosting
activated at start-up n=defrosting not activated at
start-up
n/y
n
1-2
flag
tcd
minimum time for each compressor state before
defrosting “Ontime if >0; “Offtime if >0
-31...31
0
2
min
Cod
Compressor “Off” time before defrost cycle. The
compressor is not turned on if a defrost cycle is
expected in the time indicated by the parameter.
0=Function excluded
0...60
0
2
min
“dd (2)
dE1...dE8; daily defrost start time
0...23/0...59
24
1-2
hours/min
“Fd (2)
F1...F8 festive defrost start time
0...23/0...59
24
1-2
hours/min
FPt
Determines if “FSt” and “Fot” are expressed as
absolute values or in relation to set point
0=absolute value; 1=value related to set point
0/1
0
2
flag
FSt
Fan stop temperature. Temperature limit that, if
exceeded by the value read by the evaporator
probe, stops the fans.
-50.0...150.0
2.0
1-2
°C/°F
Fot
Fan start temperature. If the temperature read by
the evaporator probe is lower than the set value
the fans remain off.
-50.0...150.0
-50.0
2
°C/°F
FAd
Fan activation intervention differential. (see “FSt”,
“Fot”)
1.0...50.0
2.0
1-2
°C/°F
Fdt
Delay before fan activation after defrosting
0...250
0
1-2
min
dt
Dripping time
min
0...250
0
1-2
dFd
Disables evaporator fans. y=fans disabled n=fans
enabled
y/n
y
1-2
flag
FCO
Disables fans with compressor off (Off)
y = fans active (with thermostat; in response to
value read by defrost probe, see “FSt” parameter);
n = fans off;
dc = duty cycle (using parameters “Fon” and “FoF”)
n/y/dc
y
1-2
flag
Fod
Enables fan stop with door open and fan re-start
when door is closed (if fans were on).
n=fans stop;
y=fans unchanged
n/y
n
2
flag
FdC
Fan shut-down delay after compressor stop
0=function excluded
0...99
0
2
min
Fon
Fan start-up time in Duty Cycle mode; valid for
FCO=dc and H42=1 (presence of probe 2)
0...99
0
2
min
FoF
Fan shut-down time in Duty Cycle mode; valid for
FCO=dc and H42=1 (presence of probe 2)
0...99
0
2
min
Att
Determines if “LAL” and “HAL” are expressed as
absolute values or as a differential related to the
set point
0=absolute value
1=value related to set point
0/1
0
2
flag
AFd
Alarm differential
1.0...50.0
2.0
1-2
°C/°F
HAL (4)
Maximum alarm. Temperature limit (whose
absolute or relative value status is regulated by
“Att”) above which the alarm is activated.
LAL...150.0
50.0
1-2
°C/°F
LAL (4)
Minimum alarm. Temperature limit (whose
absolute or relative value status is regulated by
“Att”) below which the alarm is activated.
-50.0...HAL
-50.0
1-2
°C/°F
PAO (5)
Alarm exclusion time after start-up of instrument
following a power failure
0...10
0
1-2
hours
dAO
Alarm exclusion time after defrosting
0...999
0
1-2
min
NOTE: At level 1 the folders will only display all the level 1 parameters. At level 2 the folders will only display all the
level 2 parameters. The symbol 1-2 indicates the parameters that are displayed at both menu levels
EWDR 983-985 /CS (LX)
5/11
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