Eliwell ID 974 User Manual

USER INTERFACE

The user has a display and four keys for
controlling status and programming of the
instrument.

KEYS AND MENUS

UP key Scrolls through the menu

items Increases the values
Activates manual def. function

DOWN key Scrolls through the menu items

Decreases the values
Programmable by parameter

fnc key ESC function (exit)

Programmable by parameter

set key Accesses the setpoint

Accesses the menus
Confirms the commands
Displaying the alarms (if present)

At start-up the instrument performs a
Lamp Test; for few seconds the display and
the leds blink, in order to verify their inte­grity and correct operation. The instru­ment has two main menus: the “Machine
Status” and “Programming” menu.

ACCESSING AND USING MENUS

Resources are arranged in a menu, which
can be accessed by pressing and quickly
releasing the “set” key (“Machine Status”
menu) or by holding down the “set” key
for more than 5 seconds (“Programming”
menu).
To access the contents of each folder, indi­cated by the relevant label, just press the
“set” key once.
You can now scroll through the contents
of each folder, modify it or use its func­tions.
If you do not use the keyboard for over
15 seconds (time-out) or if you press the
“fnc” key once, the last value shown on
the display is confirmed and you return to
the previous screen mask.

MACHINE STATUS MENU

To access the “Machine Status” menu
Press and quickly release the “set” key.
If alarms are not present, the label “SEt”
appears. By using the “UP” and “DOWN”
keys you can scroll through the other fold­ers in the menu:

-Pb1: probe 1 value folder;

-Pb2: probe 2 value folder

-SEt: Setpoint setting folder.

Set Setting

Access the “Machine Status” menu by
pressing and quickly releasing the “set”
key. The label of the “SEt” folder appears.
To display the Setpoint value press the
“set” key again.
The value appears on the display.
To change the Setpoint value, use the “UP”
and “DOWN” keys within 15 seconds.
If the parameter is LOC = y the Setpoint
cannot be changed.

Alarm on

If alarm condition exists, when accessing
The “Machine Status” menu the “AL” fold­er label appears (see the “Diagnostics”
section).

Displaying Probes

By pressing the “set” key when the appro­priate label appears, the value of the pro­be associated to it is displayed.

PROGRAMMING MENU

To enter the “Programming” menu, press
the “set” key for more than 5 seconds.
If specified, the access PASSWORD will be
requested, (parameter “PA1”), and the
label of the first folder will follow.
To scroll through the other folders, use
the “UP” and “DOWN” keys.
To enter the folder, press “set”. The label
of the first visible parameter appears. To
scroll through the other parameters, use
the “UP” and “DOWN” keys; to change the
parameter, press and release “set”, then
set the desired value using the “UP” and
“DOWN” keys, and confirm with the “set”
key to move to the next parameter.

PASSWORD

The password allows access to program­ming parameters. In the standard configu­ration password is not present.
To enable and assign it the desired value,
access the “Programming” menu, within
the folder with the “diS” label. If pass­word is enabled, you will see it at the
entrance of the “Programming” menu.

MANUAL ACTIVATION OF THE
DEFROSTING CYCLE

To manually activate the defrosting cycle,
press the “UP” key for 5 seconds.
If defrosting conditions are not present,
(for example the evaporator probe
temperature is higher than defrost stop
temperature), the display
will blink three (3) times, in order to
indicate that the operation will not be
performed.

COPY CARD

The Copy Card is an accessory connected
to the TTL serial port which allows pro­gramming quickly the instrument parame­ters. The operation is performed as fol­lows:

Format

This command allows copy card formatting,
an operation recommended in case of first
use.
Warning: if the copy card has been pro­grammed, using the “Fr” the data entered
are erased. This operation cannot be can­celled.

Upload

This operation loads the programming
parameters from the instrument.

Download

This operation downloads to the instru­ment the programming parameters.
The operations are performed accessing
the folder identified by the “FPr” label and
selecting, according to the case, “UL”, “dL”
or “Fr” commands; the operation is con­firmed by pressing the “set” key. If the
operation is successful an “y” is displayed,
on the contrary, if it fails a “n” will be dis­played.

ID 974

electronic controllers for “forced air” refrigerating

units

fnc

set

LED

Position Related Function Status

Compressor or relay 1 ON when the compressor is started up; blinking in case of delay,

protection or blocked enabling

Defrost ON when defrosting; blinking in case of manual

enabling

Alarm ON when the alarm is enabled; blinking when the alarm is silenced

Fans ON when the fan is working

KEYBOARD LOCKING

The instrument includes a facility for dis­abling the keyboard, by programming the
“Loc” parameter (see folder with “diS”
label). If the keyboard is locked, you can
still access the programming menu by
pressing the “SET” key.
The Setpoint can also be viewed.

DIAGNOSTICS

The alarm condition is always signalled by
the buzzer (if present) and by the led of
the alarm icon
The alarm signal produced by a faulty
thermostat probe (referred to probe 1)
is shown as E1 on the instrument display
The alarm signal produced by a faulty
evaporator probe (probe 2) is shown as E2
on the instrument display Other signalling
alarm are not shown on the instrument
display, but from the “Machine Status”
menu within the “AL” folder. The signals
for maximum and minimum alarms do not
appear on the instrument display but are
viewable on the “Machine Status” menu in
the “AL” folder, with the label “AH1” or
“AL1”.
The regulation of the maximum and mini­mum temperature alarm refers to the
thermostat probe. The temperature limits
are defined by the parameters “HAL”
(maximum alarm) and “LAL” (minimum
alarm).

INSTALLATION

The instrument is designed for panel
mounting. Make a hole of 29x71 mm,
insert the instrument and fix it using the
brackets provided. Do not mount the
instrument in humid and/or dirty places; it
is suitable for use in ordinary polluted
places. Ventilate the place in proximity to
the instrument colling slits.

ELECTRICAL
WIRING

Attention! Never work on electrical con­nections when the machine is switched on.
The instrument is equipped with screw ter­minal boards for connection of electrical
cables with a diameter of 2.5 mm

2

(one
conductor only per terminal for power
connections).
For the capacity of the terminals, see the
label on the instrument.

The relay contacts are voltage free. Do not
exceed the maximum current allowed; in
case of higher loads, use an appropriate
contactor. Make sure the power supply
voltage complies with the one required by
the instrument.
In 12V versions the power supply must be
provided by a security transformer with
the protection of a delayed 250 mA fuse.
Probes have no connection polarity and
can be extended using a regular bipolar
cable (note that the extension of the
probes affects the EMC electromagnetic
compatibility of the instrument: pay
extreme attention to wiring).
Probe cables, power supply cables and the
TTL serial cables should be distant from
power cables.

CONDITIONS OF USE

PERMITTED USE

For safety reasons the instrument must be
installed and used according to the
instruction provided and in particular,
under normal conditions, parts bearing
dangerous voltage levels must not be
accessible.
The device must be adequately protected
from water and dust as per the application
and must also only be accessible via the
use of tools (with the exception of the
frontlet).
The device is ideally suited for use on
household appliances and/or similar refrig­eration equipment and has been tested
with regard to the aspects concerning
European reference standards on safety. It
is classified as follows:

• according to its manufacture: as an auto­matic electronic control device to be
incorporated by independent mounting;

• according to its automatic operating fea­tures: as a 1 B-type operated control type;

• as a Class A device in relation to the cat­egory and structure of the software

UNPERMITTED USE

Any other use other than that permitted is
de facto prohibited. It should be noted
that the relay contacts provided are of a
practical type and therefore subject to
fault. Any protection devices required by
product standards or dictated by common
sense due to obvious safety reasons should
be applied externally.

LIABILITY AND RESIDUAL
RISKS

Invensys Controls Italy S.r.L. shall not be
liable for any damages deriving from:

- installation/use other than that pre­scribed and, in particular, that which does
not comply with safety standards anticipat­ed by regulations and/or those given here­in;

- use on boards which do not guarantee
adequate protection against electric shock,

water or dust under the conditions of
assembly applied;

- use on boards which allow access to dan­gerous parts without the use of tools;

- tampering with and/or alteration of the
products;

DISCLAIMER

This manual and its contents remain the
sole property of Invensys Controls Italy
s.r.l., and shall not be reproduced or dis­tributed without authorization. Although
great care has been exercised in the
preparation of this document, Invensys
Controls Italy s.r.l., its employees or its
vendors, cannot accept any liability what­soever connected with its use. Invensys
Controls Italy s.r.l. reserves the right to
make any changes or improvements with­out prior notice.

TECHNICAL DATA

Frontal panel protection: IP65.
Casing: plastic body in resin type
PC+ABS UL94 V-0, inspection window in
polycarbonate, buttons in thermoplastic
resin.
Dimensions: frontal panel 74x32 mm,
depth 60 mm.
Installation: on panel, with drilling tem­plate 71x29 mm (+0.2/–0.1 mm).
Use temperature: –5…55 °C.
Storage temperature.: –30…85 °C.
Use environment humidity: 10…90 % RH
(not condensing).
Storage environment humidity: 10…90% RH
(not condensing).
Viewing range: –50…110 (NTC); –50…140
(PTC) °C without decimal point (selectable
through parameter on 3 digit +

1

/2mark

display.
Analog inputs: two PTC or NTC inputs
(programmable by parameter).
Serial: TTL for connection to Copy Card or
Televis system.
Digital outputs: 3 relay contacts: first con­tact SPDT 8(3)A 250VA, second contact

SPST 8(3)A 250VA, third contact SPST 5(2)
A 250VA.
Measuring range: from –50 to 140 °C.
Accuracy: 0.5% better than end scale + 1
digit.
Resolution: 1 or 0.1 °C.
Power: 3 VA.
Power supply: 12 Va/c or 230Va.

Warning: check the power supply specified
on the instrument label; for relay and
power supply capacities, contact the Sales
Office).

ID 974 LX 2/4

DISPLAY

AH1

AL1

To silence alarms press any key.
Alarms are related to Setpoint and are considered
as the distance from the Setpoint itself.

ALARM

High temperature alarm (referred to
the thermostat probe or probe 1
Low temperature alarm (referred to
the thermostat probe or probe 1)

ID 974 LX 3/4

Tab. 1 Parameter Table

PAR.

diF

HSE
LSE

Ont

OFt

dOn

dOF

dbi

OdO

dty

dit
dCt

dOH

dEt

dSt

dPO

FSt

FAd
Fdt
dt
dFd

FCO

AFd
HAL

LAL

PAO

dAO
tAO

LOC

PA1

ndt
CA1

CA2

ddL

dro

DESCRIPTION

COMPRESSOR REGULATOR (folder with “CP” label)

diFferential. Relay compressor tripping differential. The compressor stops on reaching the
Setpoint value (as indicated by the adjustment probe), and restarts at temperature value
equal to the Setpoint plus the value of the differential.
Note: the value 0 cannot be assumed.
Higher SEt. Maximum possible setpoint value.
Lower SEt. Minimum possible setpoint value.

COMPRESSOR PROTECTIVE DEVICE (folder with “CP” label)

On time (compressor). Compressor activation time in the event of faulty probe. If set to
“1” with Oft at “0” the compressor is always on, while at Oft >0 it functions always
in duty cycle mode.
OFF time (compressor). Compressor in disabled state time in the event of a faulty probe.
If set to “1” with Ont at “0” the compressor is always off, while at Ont >0
it functions always in duty cycle mode.
delay (at) On compressor. Delay time in activating the compressor relay after switch-on
of instrument
delay (after power) OFF. Delay after switch off; the indicated time must elapse between
switch-off of the compressor relay and the successive switch-on.
delay between power-on. Delay between switch-ons; the indicated time must elapse
between two successive switch-ons of the compressor.
delay Output (from power) On. Delay time in activating the outputs after switch-on of
the instrument or after a power failure.

DEFROSTING REGULATOR (folder with “dEF” label)

defrost type. Type of defrosting.
0 = electric defrost;
1 = reverse cycle defrost (hot gas);
2 = Free defrost (compressor hot).
defrost interval time. Interval between the start of two successive defrosting operations.
defrost Counting type. Selection of count mode for the defrosting interval.
0 = compressor operating hours (DIGIFROST® method);
1 = Real Time – appliance operating time;
2 = compressor stop.
defrost Offset Hour. Start-of-defrosting delay time from start up
of instrument.
defrost Endurance time. Defrosting time-out; determines duration of
defrosting.
defrost Stop temperature. Defrost stop temperature (defined by the evaporator
probe).
defrost (at) Power On. Determines if at the start-up the instrument must enter defrosting
(if the temperature measured by the evaporator allows this operation).
y = si; n = no.

FANS REGULATOR (folder with “FAn” label)

Fan Stop temperature. Fan lock temperature; if the value, read by the evaporator probe,
is higher than the set value, fans stop.
Fan differential. Fan starting differential (see par. “FSt” and “Fot”).
Fan delay time. Delay time in activating fans after a defrost operation.
drainage time. Dripping time.
defrost Fan disable. Allows to select the evaporator probes exclusion
during defrost. y = yes; n = no.
Fan Compressor OFF. Allows to select compressor fans lock
OFF (switched off).
y = fans activated (with thermostat; based on the value read by the defrost probe,
see parameter “FSt”);
n = fans off;
d.c. = duty cycle (by parameters “Fon” and “FoF”).

ALARMS (folder with “AL” label)

Alarm Fan differential. Alarm differential.
Higher ALarm. Maximum temperature alarm. Temperature value (with regard to Setpoint)
which if exceeded in an upward direction triggers the activation of the alarm signal.

Lower ALarm. Minimum temperature alarm. Temperature value (with regard to Setpoint),
which if exceeded in a downward direction, triggers the activation of the alarm signal.

Power-on Alarm Override. Alarm exclusion time after instrument switch on,
after a power failure.
defrost Alarm Override. Alarm exclusion time after defrost.
temperature Alarm Override. Temperature alarm signal delay time.

DISPLAY (folder with “diS” label)

(keyboard) LOCk. Keyboard locking. However, you can enter parameter programming
modify them along with the status of this parameter in order to allow keyboard locking.
y = yes; n = no
PAssword 1. When enabled (value other than 0) it constitutes the access key for
level 1 parameters.
number display type. View with decimal point. y = yes; n = no
CAlibration 1.Calibration 1. Positive or negative temperature value added to the value
read by probe 1, based on “CA” parameter settings.
CAlibration 2.Calibration 2. Positive or negative temperature value added to the value
read by probe 1, based on “CA” parameter settings.
defrost display Lock. Modalità di visualizzazione durante lo sbrinamento.
0 = visualizza la temperatura letta dalla sonda cella;
1 = blocca la lettura sul valore di temperatura letto dalla sonda cella all’istante di entra­ta in sbrinamento e fino al successivo raggiungimento del valore di Setpoint;
2 = visualizza la label “deF” durante lo sbrinamento e fino al successivo raggiungimento
del valore di Setpoint.
display read-out. Selezione °C o °F per la visualizzazione temperatura letta dalla sonda.
0 = °C, 1 = °F.

DEFAULT

2.0

99.0

-50.0

0

1

0

0

0

0

0

6
1

0

30

8.0

n

2.0

2.0
0
0
y

y

2.0

50.0

-50.0

0

0
0

n

0

y
0

0

1

0

RANGE

0.1...30.0

LSE..302

-55.0...HSE

0...250

0...250

0...250

0...250

0...250

0...250

0/1/2

0...250
0/1/2

0...59

1...250

-50.0... 150

n/y

-50.0..150.0

1.0…50.0

0...250

0...250

n/y

n/y/d.c.

1.0...50.0

LAL...150.0

-50.0...HAL

0...10

0..999

0...250

n/y

0...250

n/y

-12.0...12.0

-12.0...12.0

0/1/2

0/1

VALUE* LEVEL**

1

1
1

1

1

1

1

1

1

1

1
1

1

1

1

1

1

1
1
1
1

1

1
1

1

1

1
1

1

1

1
1

1

1

1

U.M.

°C/°F

°C/°F
°C/°F

min

min

sec

min

min

min

flag

hours

flag

min

min

°C/°F

flag

°C/°F

°C/°F

min
min
flag

flag

°C/°F
°C/°F

°C/°F

hours

min
min

flag

number

flag

°C/°F

°C/°F

flag

flag

ID 974 4/4

Wiring diagram

1 2 3 4 5

6 7 8 9

10

ID 974 - 12 V

A

1 2 3 4 5 6 7

8 9

10

ID 974 - 230 V

A

TERMINALS

1 Common relay contact
2 N.A. defrost relay
3 N.C. defrost relay
4 Compressor relay output
5 Fan relay output
6 - 7 Power supply
8 - 9 Probe 2 input (evaporator)
8 - 10 Probe 1 input (thermostat)
A TTL input for Copy Card

NOTE: Default user settings

Invensys Controls Italy s.r.l

via dell'Industria, 15 Zona Industriale Paludi
32010 Pieve d'Alpago (BL) ITALY
Telephone [phone]
Facsimile [phone]
Internet http:/www.climate-eu.invensys.com

4/2002 eng
cod. 9IS42066

PAR.

H00 (1)
H42
reL
tAb

UL
dL
Fr

(1) For 230 Va models the default value is 1 (NTC input, see the label on the instrument).
* VALUE column: to be filled manually, with customized settings (if different from the default value).
** LEVEL column: indicates the level of visibility of parameters accessible by PASSWORD (see the related paragraph)

DESCRIPTION

CONFIGURATION (folder with “CnF” label)

Probe type selection, PTC or NTC. 0 = PTC; 1 = NTC.
Evaporator probe present.
reLease firmware. Device version: read only parameter.
tAble of parameters. Reserved: read only parameter.

COPY CARD (folder with “Fpr”label)

Up load. Programming parameter transfer from instrument to Copy Card.
Down load. Programming parameter transfer from Copy Card to instrument
Format. Erasing all data in the copy card.

NOTA BENE: using “Fr” parameter (copy card formatting) the data within the copy
card will be lost permenently. The operation cannot be cancelled.

DEFAULT

0
y
/
/

/
/
/

RANGE

0/1
n/y

/
/

/
/
/

VALUE* LEVEL**

1
1
1
1

1
1
1

U.M.

flag
flag

/
/

/
/
/