dIXEL
Installing and Operating Instructions
1592027320
1592027320 XW20LS RTC GB r1.0 10.07.2008.doc
XW20LS
3/5
dAY Current
day
(Sun ÷ SAt)
Hd1 First weekly holiday
(Sun ÷ nu) Set the first day of the week which follows the holiday
times.
Hd2 Second weekly holiday
(Sun ÷ nu) Set the second day of the week which follows the
holiday times.
N.B. Hd1,Hd2
can be set also as
“nu”
value (Not Used).
TO SET ENERGY SAVING TIMES (ONLY FOR MODELS WITH RTC)
ILE
Energy Saving cycle start during workdays
: (0 ÷ 23h 50 min.) During the Energy Saving
cycle the set point is increased by the value in HES so that the set point is SET + HES.
dLE
Energy Saving cycle length during workdays
: (0 ÷ 24h 00 min.) Sets the duration of the
Energy Saving cycle on workdays.
ISE
Energy Saving cycle start on holidays
. (0 ÷ 23h 50 min.)
dSE
Energy Saving cycle length on holidays
(0 ÷ 24h 00 min.)
TO SET DEFROST TIMES (ONLY FOR MODELS WITH RTC)
Ld1÷Ld6 Workday defrost start
(0 ÷ 23h 50 min.) These parameters set the beginning of the 6
programmable defrost cycles during workdays. Ex. When
Ld2
= 12.4 the second defrost starts
at 12.40 during workdays.
Sd1÷Sd6 Holiday defrost start
(0 ÷ 23h 50 min.) These parameters set the beginning of the 6
programmable defrost cycles on holidays. Ex. When
Sd2
= 3.4 the second defrost starts at
3.40 on holidays.
N.B. :To disable a defrost cycle set it to “nu”(not used).
Ex.
If
Ld6
=nu
;
the sixth defrost
cycle is disabled
OTHER
Adr Serial address
(1÷244): Identifies the instrument address when connected to a ModBUS
compatible monitoring system.
PbC Type of probe:
it allows to set the kind of probe used by the instrument:
PbC
= PBC probe,
ntc
=
NTC probe.
onF on/off key enabling: nu =
disabled;
oFF =
enabled;
ES = not set it
.
dP1 Thermostat probe display
dP2 Evaporator probe display
dP3 Third probe display
-
optional
.
rSE Real set point:
it shows the set point used during the energy saving cycle or during the
continuous cycle.
rEL Software release
for internal use
.
Ptb Parameter table code:
readable only
.
8.
DIGITAL INPUT (ENABLED ONLY IF P3P = N)
8.1
GENERIC ALARM (i1F = EAL)
As soon as the digital input is activated the unit will wait for “
did
” time delay before signalling the
“
EAL
” alarm message. The outputs status don’t change. The alarm stops just after the digital input is
de-activated.
8.2
SERIOUS ALARM MODE (i1F = bAL)
When the digital input is activated, the unit will wait for “
did
” delay before signalling the “
CA
” alarm
message. The relay outputs are switched OFF. The alarm will stop as soon as the digital input is de-
activated.
8.3
PRESSURE SWITCH (i1F = PAL)
If during the interval time set by “
did
” parameter, the pressure switch has reached the number of
activation of the “
nPS
” parameter, the “
CA
” pressure alarm message will be displayed. The
compressor and the regulation are stopped. When the digital input is ON the compressor is always
OFF.
If the nPS activation in the did time is reached, switch off and on the instrument to
restart normal regulation.
8.4
DOOR SWITCH INPUT (i1F = dor)
It signals the door status and the corresponding relay output status through the “
odc
” parameter:
no,
Fan
= normal (any change);
CPr,
F_C
= Compressor OFF.
Since the door is opened, after the delay time set through parameter “
did
”, the door alarm is
enabled, the display shows the message “
dA
” and
the regulation restarts is rtr = yES.
The alarm
stops as soon as the external digital input is disabled again. With the door open, the high and low
temperature alarms are disabled.
8.5
START DEFROST (i1F = dEF)
It starts a defrost if there are the right conditions. After the defrost is finished, the normal regulation
will restart only if the digital input is disabled otherwise the instrument will wait until the “MdF” safety
time is expired.
8.6
INVERSION OF THE KIND OF ACTION: HEATING-COOLING (i1F =Htr)
This function allows to invert the regulation of the controller: from cooling to heating and viceversa.
8.7
ENERGY SAVING (i1F = ES)
The Energy Saving function allows to change the set point value as the result of the SET+ HES
(parameter) sum. This function is enabled until the digital input is activated.
8.8
HOLIDAY DEFROST (i1F = HDF) –ONLY FOR MODELS WITH RTC
This function enabled the holiday defrost setting.
8.9
ON OFF FUNCTION (i1F = onF)
To switch the controller on and off.
8.10
DIGITAL INPUTS POLARITY
The digital input polarity depends on the “
i1P
”
parameter.
i1P =CL
: the input is activated by closing the contact.
i1P =OP
: the input is activated by opening the contact
9.
TTL SERIAL LINE – FOR MONITORING SYSTEMS
The TTL serial line, available through the HOT KEY connector, allows by means of the external
TTL/RS485 converter,
XJ485-CX
, to connect the instrument to a monitoring system
ModBUS-RTU
compatible such as the X-WEB500/3000/300.
10.
X-REP OUTPUT – OPTIONAL
As optional, an X-REP can be connected to the instrument, trough the HOY KEY
connector. The X-REP output
EXCLUDES
the serial connection.
To connect the X-REP to the
instrument the following connectors
must be used CAB-51F(1m), CAB-
52F(2m), CAB-55F(5m),
11.
INSTALLATION AND MOUNTING
The controller
XW20LS
, shall be mounted on vertical panel, in a 150x31 mm hole, and fixed using
two screws
∅
3 x 2mm. To obtain an IP65 protection grade use the front panel rubber gasket (mod.
RG-L). The temperature range allowed for correct operation is 0 - 60 °C. Avoid places subject to
strong vibrations, corrosive gases, excessive dirt or humidity. The same recommendations apply to
probes. Let the air circulate by the cooling holes.
11.1
CUT OUT
11.2
STEEL FINISHING MOUNTING
1
1
2
2
3
3
4
4
RG-LX gascke
(optional)
12.
ELECTRICAL CONNECTIONS
The instruments are provided with screw terminal block to connect cables with a cross section up to
2,5 mm
2
for the digital and analogue inputs. Relays and power supply have a Faston connection
(6,3mm). Heat-resistant cables have to be used. Before connecting cables make sure the power
supply complies with the instrument’s requirements. Separate the probe cables from the power
supply cables, from the outputs and the power connections. Do not exceed the maximum current
allowed on each relay, in case of heavier loads use a suitable external relay.
N.B.
Maximum current allowed for all the loads is 20A.
12.1
PROBE CONNECTION
The probes shall be mounted with the bulb upwards to prevent damages due to casual liquid
infiltration. It is recommended to place the thermostat probe away from air streams to correctly
measure the average room temperature. Place the defrost termination probe among the evaporator
fins in the coldest place, where most ice is formed, far from heaters or from the warmest place during
defrost, to prevent premature defrost termination.
13.
HOW TO USE THE HOT KEY
13.1
HOW TO PROGRAM A HOT KEY FROM THE INSTRUMENT (UPLOAD)
1.
Program one controller with the front keypad.
2.
When the controller is ON, insert the “
Hot key
” and push
o
key; the
"uPL"
message
appears followed a by flashing
“End”
3.
Push “
SET”
key and the
End
will stop flashing.
4.
Turn OFF the instrument remove the
“Hot Key”,
then turn it ON again.
NOTE
: the “
Err
” message is displayed for failed programming. In this case push again
o
key if you
want to restart the upload again or remove the “
Hot key
” to abort the operation.
13.2
HOW TO PROGRAM AN INSTRUMENT USING A HOT KEY
(DOWNLOAD)
1.
Turn OFF the instrument.
2.
Insert a
programmed “Hot Key” into the 5 PIN receptacle
and then turn the Controller ON.
