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11. INSTALLATION AND MOUNTING
Instrument XR70CH 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 to 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
2.5mm
. Before connecting cables make sure the power supply complies with the instrument's
2
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.
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. 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 UP button; the "uPL" message
appears followed a by a flashing "End" label.
3.
Push SET button and the "End" will stop flashing.
4.
Turn OFF the instrument, remove the "HOT-KEY" and then turn it ON again.
NOTE: the "Err" message appears in case of a failed programming operation. In this case push again
button 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 pre-programmed "HOT-KEY" into the 5-PIN receptacle and then turn the Controller
ON.
3.
The parameter list of the "HOT-KEY" will be automatically downloaded into the Controller
memory. The "doL" message will blink followed a by a flashing "End" label.
4.
After 10 seconds the instrument will restart working with the new parameters.
5.
Remove the "HOT-KEY".
NOTE: the message "Err" is displayed for failed programming. In this case turn the unit off and then
on if you want to restart the download again or remove the "HOT-KEY" to abort the operation.
14. ALARM SIGNALS
Message
Cause
"P1"
Room probe failure
"P2"
Evaporator probe failure
"P3"
Third probe failure
"P4"
Fourth probe failure
"HA"
Maximum temperature alarm
"LA"
Minimum temperature alarm
"HA2"
Condenser high temperature
"LA2"
Condenser low temperature
"dA"
Door open
"EA"
External alarm
"CA"
Serious external alarm (i2F=bAL) All outputs OFF.
"CA"
Pressure switch alarm (i2F=PAL) All outputs OFF
"rtc"
Real time clock alarm
rtF
Real time clock board failure
14.1 ALARM RECOVERY
Probe alarms P1", "P2", "P3" and "P4" start some seconds after the fault in the related probe; they
automatically stop some seconds after the probe restarts normal operation. Check connections before
replacing the probe.
Temperature alarms "HA", "LA" "HA2" and "LA2" automatically stop as soon as the temperature
returns to normal values.
Alarms "EA" and "CA" (with i2F=bAL) recover as soon as the digital input is disabled.
Alarm "CA" (with i2F=PAL) recovers only by switching off and on the instrument.
14.2 OTHER MESSAGES
Pon
Keyboard unlocked.
PoF
Keyboard locked
noP
In programming mode: none parameter is present in Pr1
On the display or in dP2, dP3, dP4: the selected probe is nor enabled
1592038030 XR70CH GB r1.0 29.05.2014
Outputs
Compressor output acc. to par. Con and CoF
Defrost end is timed
Outputs unchanged
Outputs unchanged
Outputs unchanged.
Outputs unchanged.
It depends on the AC2 parameter
It depends on the bLL parameter
Compressor and fans restarts
Output unchanged.
Alarm output ON; Other outputs unchanged;
Defrosts according to par. idF Set real time clock
has to be set
Alarm output ON; Other outputs unchanged;
Defrosts according to par. idF Contact the service
15. TECHNICAL DATA
Housing: self extinguishing ABS.
Case: frontal 38x80 mm; depth 62mm;
Mounting: panel mounting in a 71x29mm panel cut-out
Protection: IP20; Frontal protection: IP65
Connections: Screw terminal block 2.5 mm
Power supply: according to the model
12VAC/DC, ±10%
110AC 10%, 50/60Hz
230VAC 10%, 50/60Hz
Power absorption: 3VA max
Display: 3 digits, red LED, 14.2 mm high
Inputs: Up to 4 NTC or PTC probes
Digital inputs: free voltage contact
Relay outputs: compressor SPST 8(3) A, 250VAC or SPST 16A 250VAC
Defrost: SPDT 8(3) A, 250VAC
Fan: SPST 5A, 250VAC
Aux: SPDT 8(3) A, 250VAC
Buzzer: optional
Data storing: on the non-volatile memory (EEPROM)
Internal clock back-up: 24 hours
Kind of action: 1B
Pollution degree: 2
Software class: A
Rated impulsive voltage: 2500V
Overvoltage Category: II
Operating temperature: 0 to 55°C
Storage temperature: -25 to 60°C
Relative humidity: 20 to 85% (no condensing)
Measuring and regulation range:
NTC probe: -40 to 110°C (-40 to 230°F)
PTC probe: -100 to 150°C (-148 to 302°F)
Resolution: 0.1°C or 1°C or 1°F (selectable)
Accuracy (ambient temp. 25°C): ±0.7°C ±1 digit
16. CONNECTIONS
The X-REP output excludes the TTL output.. It's present in the following codes:
XR70CH- xx2xx, XR70CH –xx3xx;
16.1 XR70CH – 8A OR 16A COMP. RELAY - 230VAC OR 110VAC
16.2 XR70CH – 4 X 16A - 12VAC/DC
XR70CH
2
wiring
NOTE: The compressor relay is
8(3)A or 16(6)A according to the
model.
24Vac supply: connect to the
terminals 5 and 6.
4/5
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