Dixell
Installing and Operating Instructions
release 7.0
7. INSTALLATION AND MOUNTING
Instruments
XR160C
,
XR170C
,
XR162C
and
XR172C
shall be mounted on panel, in a 29x71 mm hole, and
fixed using the special bracket supplied.
XR160D
,
XR170D
and slave modules
XR30SL
and
XR40SL
shall be
mounted on an omega DIN rail. The instruments provided with a slave module shall be connected through the
special multipolar cable 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.
8. ELECTRICAL CONNECTIONS
The instruments are 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.
Instruments
XR162C
and
XR172C
are connected to slave modules
XR30SL
and
XR40SL
, respectively,
through a multipolar connector (included). They accommodate the instrument relays and the transformer
powering the whole system.
8.1 Probes 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.
9. ALARM SIGNALS
Message - Mode
Cause
Outputs
“EE”
Flashing
Data or memory failure
Alarm output ON; Other outputs unchanged
“P1”
Flashing
Thermostat probe failure
Alarm output ON; Compressor output
according to parameters “COn” and “COF”
“P2” Alternating
with room temperature
Evaporator probe failure
Alarm output ON; Other outputs unchanged;
End defrost is timed
“HA” Alternating
with room temperature
Maximum temperature
alarm
Alarm output ON; Other outputs unchanged.
“LA” Alternating
with room temperature
Minimum temperature alarm Alarm output ON; Other outputs unchanged.
“dEA” Alternating
with room temperature
Defrost timeout alarm
Alarm output ON; Other outputs unchanged.
“FF” Alternating
with room temperature
Fast freezing interrupted by
power failure
Alarm output ON; Other outputs unchanged.
9.1 Silencing buzzer / alarm relay output
Once the alarm signal is detected the buzzer and the alarm output can be disabled by pressing any key
according to the ALC par.
With ALC=0 or 1 buzzer and alarm relay are silenced by pressing any key
With ALC=2 or 3 the buzzer is silenced by pressing a key, the alarm relay remains activated as long as the
alarm condition lasts.
The display signal remains as long as the alarm condition remains.
952057-58
XR160C - XR170C - XR160D - XR170D - XR162C - XR172C
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