dIXEL
Installing and Operating Instructions
R1.0 1592007271
1592007271 XR80C-D GB r1.0 20.05.2005.doc
XR80C – XR80D
1/4
Milk tank controllers
XR80C – XR80D
CONTENTS
1. GENERAL WARNING______________________________________________ 1
2. GENERAL DESCRIPTION __________________________________________ 1
3. CONTROLLING LOADS ____________________________________________ 1
4. FRONT PANEL COMMANDS________________________________________ 1
5. MAXIMUM AND MINIMUM TEMPERATURE FUNCTIONS _________________ 1
6. MAIN FUNCTIONS ________________________________________________ 2
7. LIST OF PARAMETERS ____________________________________________ 2
8. INSTALLATION AND MOUNTING ____________________________________ 2
9. ELECTRICAL CONNECTIONS_______________________________________ 3
10. HOW TO USE THE HOT KEY _______________________________________ 3
11. ALARM SIGNALS _________________________________________________ 3
12. TECHNICAL DATA ________________________________________________ 3
13. CONNECTIONS __________________________________________________ 3
14. 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.
1.2
SAFETY PRECAUTIONS
•
Check the supply voltage is correct before connecting the instrument.
•
Do not expose to water or moisture: use the controller only within the operating limits
avoiding sudden temperature changes with high atmospheric humidity to prevent
formation of condensation
•
Warning: disconnect all electrical connections before any kind of maintenance.
•
The instrument must not be opened.
•
Fit the probe where it is not accessible by the end user.
•
In case of failure or faulty operation send the instrument back to the distributor or to
“Dixell S.p.A.” (see address) with a detailed description of the fault.
•
Consider the maximum current which can be applied to each relay (see Technical
Data).
•
Ensure that the wires for probes, loads and the power supply are separated and far
enough from each other, without crossing or intertwining.
•
In case of applications in industrial environments, the use of mains filters (our mod.
FT1) in parallel with inductive loads could be useful.
2.
GENERAL DESCRIPTION
Models
XR80C
, 32x 74 format, and
XR80D
, DIN format, are a microprocessor based
controllers suitable for application in the milk preservation / refrigeration sector. They are
equipped with one thermostat probe and two relay outputs to control the compressor and
agitator.
The XR80C and XR80D allow a very accurate control of all the main functions required
during the "milk-tank preservation" cycles, including the timed cycles of agitator functions.
The operator can also manually start a timed agitation cycle by pushing the
o
key on the
instrument's front panel.
Each instrument is fully configurable through special parameters that can be easily
programmed through the keypad.
3.
CONTROLLING LOADS
3.1
THE 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 “
COn
” and “
COF
”.
3.2
AGITATION CYCLE
The functions of the agitator can be selected by means of the AgC parameter.
AgC = EL
(parallEL)the agitator always operates when the compressor is running and
continues to do so for a length of time - which can be set in parameter
“Agt”
(Duration of agitation cycle)- even after the compressor stops. If the compressor does
not run longer than the time set in parameter
“IAG”
(Interval between agitation
cycles), the agitator will start to function anyway for the length of time set in parameter
Agt
.
AgC= in
independent agitator. The agitator is switched ON and OFF according to the IAg
parameter independently from the state of the compressor. It operates for the time set
in the Agt parameter.
3.3
MANUAL AGITATION CYCLE
It can be started by means of the
o
key, by holding it pressed for 3 seconds. Agitator
remains ON for the time set in Agt parameter. The compressor keeps with the normal
regulation.
4.
FRONT PANEL COMMANDS
SET
: To display target set point; in programming mode it selects a parameter or confirm
an operation.
o
(
UP)
: To see the max. stored temperature; in programming mode it browses the
parameter codes or increases the displayed value.
TO START A MANUAL AGITATION CYCLE:
in normal operation, by holding it
pressed for 3s the agitation cycle is started.
n
(
DOWN
) To see the min stored temperature; in programming mode it browses the
parameter codes or decreases the displayed value.
KEY COMBINATIONS:
o
+
n
To lock & unlock the keyboard
.
SET +
n
To enter in programming mode.
SET +
o
To return to the room temperature display.
4.1
MEANING OF LEDS
Each LED function is described in the following table.
LED
MODE
FUNCTION
ON
Compressor enabled
Flashing
-Programming Phase (flashing with
)
- Anti-short cycle delay enabled
ON
Agitator enabled
Flashing
- Programming Phase (flashing with
)
5.
MAXIMUM AND MINIMUM TEMPERATURE FUNCTIONS
5.1
HOW TO SEE THE MIN TEMPERATURE
1.
Press and release the
n
key.
2.
The “Lo” message will be displayed followed by the minimum
temperature recorded.
3.
By pressing the
n
key again or by waiting 5s the normal display will be restored.
5.2
HOW TO SEE THE MAX TEMPERATURE
1.
Press and release the
o
key.
2.
The “Hi” message will be displayed followed by the maximum
temperature recorded.
3.
By pressing the
o
key again or by waiting 5s the normal display will be restored.
5.3
HOW TO RESET THE MAX AND MIN TEMPERATURE RECORDED
1.
Hold press the SET key for more than 3s, while the max. or min temperature is
displayed. (rSt message will be displayed)
2.
To confirm the operation the “rSt” message starts blinking and the normal
temperature will be displayed.
XR80C signals and records temperature alarms, together with their duration and max
value reached. See drawing:
