Universal-XR
13/17
UXR01212015_REV1.4mm
Installation and Operating Instructions
-
tbA = n
: the alarm relay will remain active until the alarm condition is rectified;
-
tbA = Y
: the alarm relay de-activates when the buzzer is muted.
In either case, the display will flash an alarm label until the condition is rectified.
15.2
ALARM “EE”
The Dixell Universal-XR is provided with an in
ternal watchdog verifying data and memory integrity. Alarm “
EE
” will flash after detecting a failure in data
or in the internal memory. In this case, the alarm output is enabled.
WHAT TO DO
1.
Cancel the alarm by pressing a key.
2.
Check the value of all parameters and restore correct values when wrong.
3.
Check the correct instrument operation and in case of further errors replace it.
15.3
ALARM RECOVERY
Probe alarms “
P1
”, “
P2
” and “
P3
” start 30 seconds after a fault in probe is detected; they automatically stop 30 sec
onds after the probe restarts normal operation. Check
connections before replacing the probe.
Temperature alarms “
HA
” and “
LA
” automatically stop as soon as the thermostat temperature returns to normal values and when defrost starts. Temperature alar
ms
“
HA2
” and “
LA2
” automatically stop as soon as the condenser temperature returns to normal values.
16.
REMOVING SECURITY LEVEL PROTECTION
It is possible to allow access to any parameter from
Pr1
level. To do this, go into
Pr2
as previously described. Scroll to the label of the parameter you require and then
press the
SET
and
DOWN
buttons in quick succession. The decimal point LED will be on indicating that access to this particular parameter is now possible from
Pr1
level. Its label will now appear when in
Pr1
programming level and its value can be altered. To restore security level protection, use the same procedure (the decimal
point LED will go out after pressing both buttons).
17.
MOUNTING
The Universal-XR should be mounted in a panel, in a 29
mm (1.14”)
x 71mm (2.8
”)
hole, and fixed using the special brackets supplied. Ambient temperature for correct
operation is 32 to 140°F. Avoid places subject to strong vibrations, corrosive gases, excessive dirt or humidity (20 to 85% non-condensing RH is the recommended
working range). Make sure air can freely circulate through the cooling holes slots at the rear side of the controller.
18.
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 ou
tputs and from the
power connections. Do not exceed the maximum current rating for each relay; in case of heavier loads use a suitable external relay.
19.
PROBES
It is recommended to place the thermostat probe away from rapid 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.
20.
TECHNICAL DATA
Housing:
Self-extinguishing ABS
Size:
Frontal 32x74 mm; depth 70mm
Mounting:
Panel mounting in a 71x29 mm panel cut-out
Frontal protection:
IP65
Connections:
Screw terminal block
2.5 mm
2
wiring
Power supply:
120Vac, -10% +15% or 230Vac, -10% +15%
Power absorption:
4 VA max
Display:
3 digits, red LED, 14.2mm high
Inputs:
a maximum of 3 temperature probes, PTC or NTC type.
Probes (supplied):
2 x NTC, range-50 TO 110°C (-58 to 230°F) with 1.5-meter (4.98
’
) cables
Relay outputs:
Compressor:
SPST relay 16FLA / 96LRA, 250Vac
Defrost:
SPDT relay 10A, 250Vac
Fans:
SPST relay 5A, 250Vac
Other output:
Buzzer for acoustic signalling of alarms
Data storing:
Non-volatile memory (EEPROM)
Ambient temperature:
0 to 60°C (32 to 140°F)
Ambient humidity:
20 to 85% (non-condensing)
Storage temperature:
-30 to 85°C (-22 to 185°F)
Operating range:
PTC:
-50 to 150°C (-58 to 302°F);
NTC:
-50 to 110°C (-40 to 230°F)
Resolution:
0.1°C or 1°F (selectable)
Accuracy at 25°C:
(range -40 to 50°C)
0.5 °C
1 digit
