dIXEL
Installing and Operating Instructions
PRELIMINARY
MANUAL RNC 2007 053 PRELIMINARY T66 + XW60K.doc
T66 – XW60K
1/4
Digital controller with defrost management
T66 - XW60K
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_____________________________________________ 2
7.
PARAMETERS________________________________________________ 2
8.
DIGITAL INPUT:_______________________________________________ 3
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
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.
•
Fit the probe where it is not accessible by the End User. The instrument must
not be opened.
•
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
XW60K + T66
is microprocessor based controller, suitable for applications
on medium or low temperature refrigerating units. It has 4 relay outputs to control
compressor, defrost can be either electrical or reverse cycle (hot gas), fans and
light. It is also provided with two NTC or PTC probe inputs, one for temperature
control, the other, to be located onto the evaporator, to control the defrost
termination temperature. The instrument is fully configurable through special
parameters that can be easily programmed through the keyboard.
NOTE:
on the keyboard is present a jumper enabling or
disabling the digital input.
Please refer to wiring diagrams to see how the connections are
modified according to the use of the jumper.
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.
Time
Temper.
Compr.
SET
ON
In case of fault in the thermostat probe the
start and stop of the compressor are timed
through parameters “
COn
” and “
COF
”.
3.2 DEFROST
Two defrost modes are available through the “
tdF
” parameter: defrost through
electrical heater (
tdF = EL
) and hot gas defrost (
tdF = in
). Other parameters are
used to control the interval between defrost cycles (IdF), its maximum length
(MdF) and two defrost modes: timed or controlled by the evaporator’s probe (P2P).
At the end of defrost dripping time is started, its length is set in the FSt parameter.
With FSt =0 the dripping time is disabled.
4. FRONT PANEL COMMANDS
SET
: To display target set point; in programming mode it selects a parameter or
confirm an operation.
(DEF)
To start a manual defrost
o
(
UP)
: To see the last temperature alarm happened; in programming mode it
browses the parameter codes or increases the displayed value.
n
(
DOWN
) To see the last temperature alarm happened ;in programming mode
it browses the parameter codes or decreases the displayed value.
LIGHT
: Switch ON and OFF the cold room light.
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 USE OF LEDS
Each LED function is described in the following table.
LED MODE
FUNCTION
ON Compressor
enabled
Flashin
g
-Programming Phase (flashing with
)
- Anti-short cycle delay enabled
ON Defrost
enabled
Flashin
g
- Programming Phase (flashing with
)
- Drip time in progress
ON Fans
enabled
Flashin
g
Fans delay after defrost in progress.
ON
Light relay on.
ON
An temperature alarm happened
5. TEMPERATURE ALARM AND ITS DURATION
RECORDING (HACCP)
T66 signals and records temperature alarms, together with their duration and max
value reached. See drawing:
Ex. High temperature alarm
Set
ALu
High temp. alarm
Time
Temperature
ALL
Low temp. alarm
X
X
X
Alarm duration
Max
Temperature
Safe food zone
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::
