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B2: DIXELL OPERATING INSTRUCTIONS

dIXEL

Installing and Operating Instructions

1592020070

1592020070 XR70CX GB m&M r1.130.11.2007.doc

XR70CX

2/4

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 CHANGE A PARAMETER VALUE

To change the parameter’s value operate as follows:
1.

Enter the Programming mode by pressing the

Set

keys for 3s (the “

°C” or “°F”

LED starts

blinking).

Select the required parameter. Press the “

SET

” key to display its value

Use “

” or “

DOWN

” to change its value.

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.

6.5

THE HIDDEN MENU

The hidden menu Includes all the parameters of the instrument.

6.5.1

HOW TO ENTER THE HIDDEN MENU

Enter the Programming mode by pressing the

Set

keys for 3s (the “

°C” or “°F”

LED starts

blinking).

Released the keys, then push again the Set+

keys for more than 7s. The Pr2 label will be

displayed immediately followed from the HY parameter.

NOW YOU ARE IN THE HIDDEN MENU.

Select the required parameter.

Press the “

SET

” key to display its value

Use

to change its value.

Press “

SET

” to store the new value and move to the following parameter.

To exit

: Press

SET +

or wait 15s without pressing a key.

NOTE1:

if none parameter is present in Pr1, after 3s the “noP” message is displayed. Keep the keys

pushed till the Pr2 message is displayed.

NOTE2

: the set value is stored even when the procedure is exited by waiting the time-out to expire.

6.5.2

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.

6.6

HOW TO LOCK THE KEYBOARD

Keep pressed for more than 3 s the

DOWN

keys.

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

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

6.7

TO UNLOCK THE KEYBOARD

Keep pressed together for more than 3s the

and

keys, till the

“Pon”

message will be

displayed.

6.8

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 to maintain the “

ccS

” set point 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.

6.9

THE ON/OFF FUNCTION

With “

onF = oFF

”, pushing the

ON/OFF

key, the instrument is switched off. The

“OFF”

message is displayed. In this configuration, the regulation is disabled.
To switch the instrument on, push again the ON/OFF key.

WARNING: Loads connected to the normally closed contacts of the relays are always
supplied and under voltage, even if the instrument is in stand by mode.

PARAMETERS

REGULATION
Hy Differential

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

is Set Point + 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 value for the set point.

US Maximum set point:

(SET÷110°C/ SET÷230°F). Set the maximum value for set point.

Ot Thermostat probe calibration

: (-12.0÷12.0°C; -120÷120°F) allows to adjust possible offset of

the thermostat probe.

P2P Evaporator probe presence: n

= not present: the defrost stops by time;

present: the defrost

stops by temperature.

OE Evaporator probe calibration:

(-12.0÷12.0°C; -120÷120°F). allows to adjust possible offset of

the evaporator probe.

P3P Third probe presence (P3): n

= not present:, the terminal operates as digital input.;

present:, the terminal operates as third probe.

O3 Third probe calibration (P3):

(-12.0÷12.0°C; -120÷120°F). allows to adjust possible offset of

the third probe.

P4P Fourth probe presence

: (n = Not present; y = present).

o4 Fourth probe calibration

: (-12.0

12.0°C) allows to adjust possible offset of the fourth 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.

rtr Percentage of the second and first probe for regulation (0÷100; 100 = P1, 0 = P2 ):

allows to set the regulation according to the percentage of the first and second probe, as for the
following formula (rtr(P1-P2)/100 + P2).

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.

CCS Set point for continuous cycle:

(-50÷150°C) it sets the set point used during the continuous

cycle.

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.

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.

Lod Instrument display

: (P1; P2, P3, P4, SET, dtr): it selects which probe is displayed by the

instrument:

= Thermostat probe;

= Evaporator probe;

= Third probe(only for model

with this option enabled);

= Fourth probe,

SET

= set point;

dtr

= percentage of

visualization.

rEd X- REP display (

optional

)

: (P1; P2, P3, P4, SET, dtr): it selects which probe is displayed by

X- REP:

= Thermostat probe;

= Evaporator probe;

= Third probe(only for model with

this option enabled);

= Fourth probe,

SET

= set point;

dtr

= percentage of visualization.

dLy Display delay:

(0 ÷20.0m; risul. 10s) when the temperature increases, the display is updated

of 1 °C/1°F after this time.

dtr Percentage of the second and first probe for visualization when Lod = dtr (0÷100; 100 =

P1, 0 = P2 ): if Lod = dtr

it allows to set the visualization according to the percentage of the

first and second probe, as for the following formula (dtr(P1-P2)/100 + P2).

DEFROST
dFP Probe selection for defrost termination: nP

= no probe;

=thermostat probe;

P2 =

evaporator probe;

=configurable probe;

= Probe on Hot Key plug.

tdF Defrost type

: EL = electrical heater; in = hot gas

dtE Defrost termination temperature

: (-50÷50 °C/

-58÷122°F) (Enabled only when EdF=Pb) sets the temperature measured by the evaporator
probe, which causes the end of 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) When

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.

dSd Start defrost delay

: ( 0÷99min) This is useful when different defrost start times are necessary

to avoid overloading the plant.

dFd Temperature displayed during defrost

: (

= real temperature;

= temperature at defrost

start;

SEt

= set point;

dEF

= “dEF” label)

dAd MAX display delay after defrost

: (0÷255min). Sets the maximum time between the end of

defrost and the restarting of the real room temperature display.

Fdt Drip time

: (0

120 min) time interval between reaching defrost termination temperature and the

restoring of the control’s normal operation. This time allows the evaporator to eliminate water
drops that might have formed due to defrost.

dPo First defrost after start-up

: (y = immediately; n = after the IdF time)

dAF Defrost delay after continuous cycle

: (0

23.5h) time interval between the end of the fast

freezing cycle and the following defrost related to it.

FANS
FnC Fans operating mode

C-n

= runs with the compressor, OFF during defrost;

o-n

= continuous mode, OFF during defrost;

C-Y

= runs with the compressor, ON during defrost;

o-Y

= continuous mode, ON during defrost;

Fnd Fans delay after defrost:

(0÷255min) Interval between end of defrost and evaporator fans

start.

Fct Temperature differential avoiding short cycles of fans

(0÷59°C; Fct=0 function disabled). If

the difference of temperature between the evaporator and the room probes is more than the
value of the Fct parameter, the fans are switched on.

FSt Fans stop temperature

: (-50÷50°C/122°F) setting of temperature, detected by evaporator

probe, above which fans are always OFF.

Fon Fan ON time:

(0÷15 min)

with

Fnc = C_n or C_y, (fan activated in parallel with compressor). it

sets the evaporator fan ON cycling time when the compressor is off. With Fon =0 and FoF

the fan are always off, with Fon=0 and FoF =0 the fan are always off.

FoF Fan OFF time:

(0÷15 min)

with

Fnc = C_n or C_y, (fan activated in parallel with compressor). it

sets the evaporator fan off cycling time when the compressor is off. With Fon =0 and FoF

the fan are always off, with Fon=0 and FoF =0 the fan are always off.

FAP Probe selection for fan management: nP

= no probe;

=thermostat probe;

P2 =

evaporator

probe;

=configurable probe;

= Probe on Hot Key plug.

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

: (SET÷110°C; SET÷230°F) when this 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.

AFH Differential for temperature alarm/ fan recovery:

(0,1÷25,5°C; 1÷45°F) Intervention

differential for recovery of temperature alarm. It’s also used for the restart of the fan when the
FSt temperature is reached

ALd Temperature alarm delay

: (0÷255 min) time interval between the detection of an alarm

condition and alarm signalling.