dIXEL
Installing and Operating Instructions
1592020570
1592020570 XR70CX RTC GB r1.0 28.05.2008.doc
XR70CX
3/5
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.
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.
CONDENSER TEMPERATURE ALARM
AP2 Probe selection for temperature alarm of condenser: nP
= no probe;
P1
=thermostat probe;
P2 =
evaporator probe;
P3
=configurable probe;
P4
= Probe on Hot Key plug.
AL2 Low temperature alarm of condenser
:
(-55÷150°C) when this temperature is reached the
LA2 alarm is signalled, possibly after the Ad2 delay.
Au2 High temperature alarm of condenser
:
(-55÷150°C) when this temperature is reached the
HA2 alarm is signalled, possibly after the Ad2 delay.
AH2 Differential for temperature condenser alarm recovery
:
(0,1÷25,5°C; 1÷45°F)
Ad2 Condenser temperature alarm delay
: (0÷255 min) time interval between the detection of the
condenser alarm condition and alarm signalling.
dA2 Condenser temperature alarm exclusion at start up
: (from 0.0 min to 23.5h, res. 10min)
bLL Compressor off with low temperature alarm of condenser
:
n = no:
compressor keeps on
working
; Y = yes,
compressor is switched off till the alarm is present, in any case regulation
restarts after AC time at minimum.
AC2 Compressor off with high temperature alarm of condenser
:
n = no:
compressor keeps on
working
; Y = yes,
compressor is switched off till the alarm is present, in any case regulation
restarts after AC time at minimum.
FOURTH RELAY
tbA Alarm relay silencing (with oA3=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
oA3 Fourth relay configuration:
ALr
: alarm;
Lig
: light;
AuS
: Auxiliary relay;
onF
: always on with
instrument on;
db =
do not select it;
dEF:
do not select it!.
; FAn:
do not select it!.
; dF2:
do not
select it.
AoP Alarm relay polarity:
it set if the alarm relay is open or closed when an alarm happens.
CL
=
terminals 1-2 closed during an alarm;
oP
= terminals 1-2 open during an alarm
DIGITAL INPUT
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;
AUS
=not enabled;
Htr
= kind of
action inversion (cooling – heating);
FAn = not set it; ES =
Energy saving.
did
:
(0
÷
255 min)
with
i1F= EAL or i1F = bAL digital input alarm delay:
delay between the
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
÷
15) Number of activation of the pressure 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 and fan status when open door:
no
= normal;
Fan
= Fan OFF;
CPr
=
Compressor OFF;
F_C
= Compressor and fan OFF.
rrd Outputs restart after doA alarm: no =
outputs not affected by the doA alarm;
yES =
outputs
restart with the doA alarm;
HES Temperature increase during the Energy Saving cycle :
(-30,0°C
÷
30,0°C/-22÷86°F) it sets
the increasing value of the set point during the Energy Saving cycle.
TO SET CURRENT TIME AND WEEKLY HOLIDAYS
Hur Current
hour
(0 ÷ 23 h)
Min Current
minute
(0 ÷ 59min)
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
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 operation 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
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
.
dP4 Fourth probe display
.
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 WITH P3P = N)
The free voltage digital input is programmable in different configurations by the “
i1F
” parameter.
8.1
DOOR SWITCH INPUT (i1F = dor)
It signals the door status and the corresponding relay output status through the “
odc
” parameter:
no
= normal (any change);
Fan
= Fan OFF;
CPr
= Compressor OFF;
F_C
= Compressor and fan 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.
8.2
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.
8.3
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.
8.4
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.
8.5
START DEFROST (i1F = dFr)
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
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
Instrument
XR70CX
shall be mounted on vertical panel, in a
29x71 mm hole, and fixed using the special bracket supplied.
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 air circulate by the cooling holes.
12.
ELECTRICAL CONNECTIONS
The instrument is provided with screw terminal block to connect cables with a cross section up to 2,5
mm
2
. 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.
