dixell XR30C Installing And Operating Insructions

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Alarm duration

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Digital controller with off cycle defrost

XR30C

CONTENTS

1. GENERAL WARNING___________________________________________ 1

2. GENERAL DESCRIPTION _______________________________________ 1

3. CONTROLLING LOADS _________________________________________ 1

4. FRONT PANEL COMMANDS_____________________________________ 1

5. TEMPERATURE ALARM AND ITS DURATION RECORDING (HACCP)___ 1

6. MAIN FUNCTIONS _____________________________________________ 1

7. PARAMETERS ________________________________________________ 2

8. DIGITAL INPUT________________________________________________ 2

9. INSTALLATION AND MOUNTING _________________________________ 3

10. ELECTRICAL CONNECTIONS ___________________________________ 3

11. HOW TO USE THE HOT KEY ____________________________________ 3

12. ALARM SIGNALS ______________________________________________ 3

13. TECHNICAL DATA _____________________________________________ 3

14. CONNECTIONS _______________________________________________ 4

15. DEFAULT SETTING VALUES ____________________________________ 4

1. GENERAL WARNING

1.1 PLEASE READ BEFORE USING THIS MANUAL

• This manual is part of the product and should be kept near the instrument for
easy and quick reference.

• The instrument shall not be used for purposes different from those described
hereunder. It cannot be used as a safety device.

• Check the application limits before proceeding.

1.2

• Check the supply voltage is correct before connecting the instrument.

• Do not expose to water or moisture: use the controller only within the operating

• Warning: disconnect all electrical connections before any kind of maintenance.

• Fit the probe where it is not accessible by the End User. The instrument must

• In case of failure or faulty operation send the instrument back to the distributor

• Consider the maximum current which can be applied to each relay (see

• Ensure that the wires for probes, loads and the power supply are separated

• In case of applications in industrial environments, the use of mains filters (our

2. GENERAL DESCRIPTION

Model
designed for refrigeration applications at normal temperature. It provides two relay
outputs, one for the compressor, the other one can be used for alarm signalling or
as auxiliary output. The probe input can be selected between PTC or NTC. The
instrument has a digital input, for alarm signalling, for switching the auxiliary output
or for start a defrost cycle.

3. CONTROLLING LOADS

3.1 COMPRESSOR

The regulation is performed according to the temperature measured by the
thermostat probe with a positive differential from the set point: if the temperature
increases and reaches set point plus differential the compressor is started and then
turned off when the temperature reaches the set point value again.

In case of fault in the thermostat probe the start and stop of the compressor are
timed through parameters “

3.2 DEFROST

Defrost is performed through a simple stop of the compressor. Parameter “
controls the interval between defrost cycles, while its length is controlled by
parameter “

SAFETY PRECAUTIONS

limits avoiding sudden temperature changes with high atmospheric humidity to
prevent formation of condensation

not be opened.
or to “Dixell s.r.l.” (see address) with a detailed description of the fault.
Technical Data).
and far enough from each other, without crossing or intertwining.
mod. FT1) in parallel with inductive loads could be useful.

, format 32 x 74 mm, is a digital termostat with off cycle defrost

XR30C

MdF

” and “

COn

”.

COF

”.

IdF

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4. FRONT PANEL COMMANDS

: To display target set point; in programming mode it selects a parameter or

SET

confirm an operation.

To start a manual defrost

(DEF)

'

(UP): To see the last temperature alarm happened; in programming mode it

'

browses the parameter codes or increases the displayed value.

&

(DOWN) To see the last temperature alarm happened; hold pressed it switches

&

the auxiliary output; in programming mode it browses the parameter codes or
decreases the displayed value.

KEY COMBINATIONS:

'

+

&

'

SET +
SET +

4.1 USE OF LEDS

Each LED function is described in the following table.

LED MODE FUNCTION

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5. TEMPERATURE ALARM AND ITS DURATION
RECORDING (HACCP)

XR30C signals and records temperature alarms, together with their duration and
max value reached. See drawing:

Ex. High temperature alarm

5.1 HOW TO SEE THE ALARM DURATION AND MAX (MIN)
TEMPERATURE

If the alarm LED is on, an alarm has taken place.
To see the kind of alarm, the max (min) reached temperature and alarm duration do
as follows:

1. Push the Up or Down key.

2. On the display the following message is shown::

3. Then the instrument displays the temperature once again.

NOTE1:
NOTE2:

5.2 HOW TO RESET A RECORDED ALARM OR ONE THAT IS
STILL OCCURRING

”

1. Hold the SET key pressed for more than 3s, while the recorded alarm is

2. To confirm the operation, the “rSt” message starts blinking and the normal

6. MAIN FUNCTIONS

To lock & unlock the keyboard.

&

&

To enter in programming mode.

&
'

To return to the room temperature display.

'

ON Compressor enabled
Flashing

-Programming Phase (flashing with

- Anti-short cycle delay enabled

ON Defrost enabled
Flashing

- Programming Phase (flashing with

ON Second relay ON
ON An temperature alarm happened

Tem pe ratu re

Max

Temperature

ALu

High temp. alarm

Set

ALL

Low temp. alarm

“

” for high temperature alarm (“

HAL

the

Maximum (minimum) temperature.

Then the “
h.mm.

if an alarm is still occurring the “

the alarm is recorded when the temperature come back to normal values

displayed. (the rSt message will be displayed)
temperature will be displayed.

tiM

” (

tiM

;

LAL

e) message is displayed, followed by the

” shows the partial duration.

tim

)

)

;

;

Time

” fot the minimum allarm), foll owed by

“Duration”

in

6.1 HOW TO SEE THE SET POINT

1. Push and immedi ately release the
show the Set point value;

2. Push and im mediately release the
probe value again.

SET

key: the display will

SET

key or wait for 5 seconds to display the

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6.2 HOW TO CHANGE THE SETPOINT

1. Push the SET key for more than 2 seconds to change the Set point value;

2. The value of the set point will be displayed and the

3. To change the Set value push the

4. To memorise the new set point value push the SET key again or wait 10s.

'

or

&

'

&

arrows within 10s.

LED starts blinking;

6.3 HOW TO START A MANUAL DEFROST

Push the DEF key for more than 2 seconds and a manual
defrost will start.

6.4 HOW TO SWITCH ON OR OFF THE SECOND RELAY
(OAC= LHt)

Hold pressed the
turned ON or OFF

&

key for some seconds, till the

&

6.5 HOW TO CHANGE A PARAMETER VALUE

To change the parameter’s value operate as follows:

5. Press “SET” to store the new value and move to the following parameter.

To exit: Press SET + UP or wait 15s without pressing a key.
NOTE: the set value is stored even when the procedure is exited by waiting the

time-out to expire.

1. Enter the Programming mode by pressing the Set and
DOWN key for 3s (

2. Select the required parameter.

3. Press the “SET” key to display its value (now only the
LED is blinking).

4. Use “UP” or “DOWN” to change its value.

and

start blinking).

6.6 THE HIDDEN MENU

The hidden menu Includes all the parameters of the instrument.

6.6.1 HOW TO ENTER THE HIDDEN MENU

3. Select the required parameter.

4. Press the “SET” key to display its value (Now only the

5. Use

''or

6. Press “SET” to store the new value and move to the following parameter.
To exit: Press SET +
NOTE: the set value is stored even when the procedure is exited by waiting the

time-out to expire.

6.6.2 HOW TO MOVE A PARAMETER FROM THE HIDDEN MENU TO THE
FIRST LEVEL AND VICEVERSA.

Each parameter present in the HIDDEN MENU can be removed or put into “THE
FIRST LEVEL” (user level) by pressing “SET +
In HIDDEN MENU when a parameter is present in First Level the decimal point is
on.

1. Enter the Programming mode by pressing the Set +

for 3s (LED 1 and

2. When a param eter is displayed keep pressed the Set+

for more than 7s. The Pr2 label will be displayed
immediately followed from the HY parameter.

NOW YOU ARE IN THE HIDDEN MENU.

&& to change its value.

''or wait 15s without pressing a key.

start blinking).

&

”.

&

LED is blinking).

6.7 HOW TO LOCK THE KEYBOARD

1.

Keep pressed for more than 3 s the

2.

The “POF” message will be displayed and the keyboard will be locked. At this
point it will be possible only to see the set point or the MAX o Min temperature
stored

3.

If a key is pressed more than 3s the “POF” message will be displayed.

''and

&& keys.

6.8 TO UNLOCK THE KEY BOARD

Keep pressed together for more than 3s the
will be displayed.

''and

&& keys, till the “Pon” message

6.9 THE CONTINUOUS CYCLE

When defrost is not in progress, it can be activated by holding
the “

''” key pressed for about 3 seconds.

The compressor operates in continuous mode for the time set through the “CCt”
parameter. The cycle can be terminated before the end of the set time using the
same activation key “

''” for 3 seconds.

7. PARAMETERS

NOTE: the parameters preceded by dots are in the Hidden Menu.
REGULATION
Hy Differential

Compressor Cut IN is Set Point Plus Differential (Hy). Compressor Cut OUT is
when the temperature reaches the set point.

•

LS Minimum set point: (- 50°C÷SET/-58°F÷SET): Sets the minimum
acceptable value for the set point.

•

US Maximum set point: (SET÷110°C/ SET÷230°F). Set the maximum

acceptable value for set point.

: (0,1 ÷ 25,5°C / 1÷255 °F) Intervention differential for set point.

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LED is

&

key

&

&

&

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Ot Thermostat probe calibration: (-12.0÷12.0°C;

-120÷120°F) allows to adjust possible offset of the thermostat probe.

OdS Outputs activation delay at start up: (0÷255min) This function is

•

enabled at the initial start up of the instrument and inhibits any output activation
for the period of time set in the parameter.

AC Anti-short cycle delay: (0÷50 min) minimum interval between the compressor

stop and the following restart.

CCt Compressor ON time during continuous cycle: (0.0÷24.0h; res. 10min)

•

Allows to set the length of the continuous cycle: compressor stays on without
interruption for the CCt time. Can be used, for instance, when the room is filled
with new products.

•

COn Compressor ON time with faulty probe: (0÷255 min) time during which
the compressor is active in case of faulty thermostat probe. With COn=0
compressor is always OFF.

•

COF Compressor OFF time with faulty probe: (0÷255 min) time during which
the compressor is OFF in case of faulty thermostat probe. With COF=0

compressor is always active.

CH Type of action: CL = cooling; Ht = heating.
DISPLAY

•

CF Temperature measurement unit:

°C=Celsius; °F=Fahrenheit. WARNING: When the measurement unit is

changed the SET point and the values of the parameters Hy, LS, US, Ot, ALU
and ALL have to be checked and modified if necessary).

rES Resolution (for °C): (in = 1°C; dE = 0.1 °C) allows decimal point display.
DEFROST
IdF Interval between defrost cycles: (0÷120h) Determines the time interval

between the beginning of two defrost cycles.

MdF (Maximum) length for defrost: (0÷255min) W hen P2P = n, (not evaporator

probe: timed defrost) it sets the defrost duration, when P2P = y (defrost end
based on temperature) it sets the maximum length for defrost.

dFd Temperature displayed during defrost: (rt = real temperature; it =

•

temperature at defrost start; SEt = set point; dEF = “dEF” label)

•

dAd MAX display delay after defr ost: (0÷255min). Sets the maximum time
between the end of defrost and the restarting of the real room temperature
display.

ALARMS

•

ALC Temperature alarms configuration: (Ab; rE)
Ab= absolute temperature: alarm temperature is given by the ALL or ALU

values. rE = temperature alarms are referred to the set point. Temperature
alarm is enabled when the temperature exceeds the “SET+ALU” or “SET-ALL”
values.

ALU MAXIMUM temperature alarm

temperature is reached the alarm is enabled, after the “ALd” delay time.

ALL Minimum temperature alarm: (-50.0 ÷ SET°C;

-58÷230°F when this temperature is reached the alarm is enabled, after the
“ALd” delay time.

ALd Temperature alarm delay: (0÷255 min) time interval between the

•

detection of an alarm condition and alarm signalling.

•

dAO Exclusion of temperature alarm at startup: (from 0.0 min to 23.5h) time
interval between the detection of the temperature alarm condition after
instrument power on and alarm signalling.

SECOND RELAY AND DIGITAL INPUT

•

tbA Alarm relay silencing (with oAC=ALr):
(n= silencing disabled: alarm relay stays on till alarm condition lasts, y
=silencing enabled: alarm relay is switched OFF by pressing a key during an
alarm).

OA1 Second relay configuration: ALr: alarm; LHt: auxiliary; onF: always on; dEF:

do not select it!.; FAn: do not select it!.;

AoPAlarm relay polarity: it set if the alarm relay is open or closed when an alarm

happens. CL= the relay is closed; oP = the relay is open

i1P Digital input polarity: oP: the digital input is activated by opening the contact;

CL: the digital input is activated by closing the contact.

i1F Digital input configuration:

EAL = external alarm: “EA ” message is displayed; bAL = serious alarm “CA”

message is displayed. PAL = pressure switch alarm, “CA” message is
displayed; dor = door switch function; dEF = activation of a defrost cycle; LHt
=switch on the second relay if oA1=LHt; Htr = kind of action inversion (cooling
– heating).

did:(0÷255 min)

with i1F= EAL or i1F = bAL digital input alarm delay:

detection of the external alarm condition and its signalling.

with i1F= dor: door open signalling delay
with i1F = PAL: time for pressure switch function: time interval to calculate

the number of the pressure switch activation.

nPS Pressure switch number: (0

switch, during the “did” interval, before signalling the alarm event (I2F= PAL).

If the nPS activation in the did time is reached, switch off and on the
instrument to restart normal regulation.

odc Compressor status when open door: no, Fan = normal; CPr, F_C =

•

Compressor OFF

OTHER
PbC Type of probe: it allows to set the kind of probe used by the instrument: PbC

= PBC probe, ntC = NTC probe.

•

rEL Software release for internal use.

•

Ptb Parameter table code: readable only.

8. DIGITAL INPUT

The free contact digital input is programmable in five different configurations by the
“i1F” parameter.

: (SET÷110°C; SET÷230°F) when this

delay between the

÷

15) Number of activation of the pressure