Emerson Dixell XB Series Installing And Operating Instructions page 10

rrd Regulation restart with door open alarm: Y=count down and regualtion restart when door open
alarm is signalled; n=compressor and fans stay according to the odC parameter when door open alarm
is signalled.
d2F Second digital input configuration (26-27): (EAL; bAL) EAL=external alarm; bAL=serious alarm,
regulation is stopped.;
d2P: Configurable digital input polarity (26-27): (OP; CL) select if the digital input is activated by opening
or closing the contact. OP=opening; CL=closing.
did Time delay for digital input alarm: (0 to 255 min) if d2F=EAL or bAL (external alarms), did parameter
defines the time delay between the detection and the successive signalling of the alarm.
oA1 First auxiliary relay configuration (7-8):
ALL=alarm; Lig=light; AuS=second thermostat; tMr=auxiliary relay enabled by keyboard;
C2=second compressor: it is always switched on during the Cycles while depends on the 2CH
parameter during the holding phase.
oA2 First auxiliary relay configuration (1-2):
ALL=alarm; Lig=light; AuS=second thermostat; tMr=auxiliary relay enabled by keyboard;
C2=second compressor it is always switched on during the Cycles while depends on the 2CH
parameter during the holding phase.
oA3 First auxiliary relay configuration (9-10)
ALL=alarm; Lig=light; AuS=second thermostat; tMr=auxiliary relay enabled by keyboard;
C2=second compressor: it is always switched on during the Cycles while depends on the 2CH
parameter during the holding phase.
2CH Compressors setting during the holding phase (used only if one OAi =C2):
The second compressor is always switched on during the phases, during the holding depends on this
parameter.
The 2CH sets which compressor is used during the holding phase.
Second compressor operates on SET+OAS. (SET is the value loaded during the holding phase of each
cycle). It starts oAt min after the first compressor.
The following table shows how it works:
Holding
2CH =C1 C1 on
2CH =C2 C2 on
2CH =1C2 C1 on; C2 On
OAt Second compressor switching on delay: (0 to 255 min) time delay between the switching on of the
first and second compressor.
OAS Set point for second compressor (-50 to 50, res.1°C or 1°F) this set point is a differential add to the
set point of the first compressor.
ES:
OAS=0 the set point of the second compressor s the same set point of the first compressor.
OAS=5 the set point of the second compressor is SET (of first compressor) + 5;
OAS=-5 the set point of the second compressor is SET (of first compressor) – 5.
OAH Differential for second compressor: (-12.0 to 12.0, res.0.1°C or 1°F, always≠0) second compressor
cut IN is SETH+OAS+OAH. Second compressor cut out is when the temperature SETH+OAS.
OAi Probe selection for the second compressor: rP=thermostat probe; EP=evaporator probe; tiM=cycle
count down; i1P=insert probe 1; i2P=insert probe 2; i3P=insert probe 3.
OSt AUX output timer: (0 to 255 min) time in which the AUX output stays ON. It is used when oA1 or oA2
or oA3=tMr. With oAt=0 the AUX relay is switched on and off only manually.
OSS Set point for AUX output, used when oA1 or oA2 or oA3=AUS: (-50 to 50, res.1°C or 1°F).
OSH Differential for AUX output: (-12.0 to 12.0, res. 0.1°C or 1°F, always≠0) intervention differential for
the set point of the AUX output, with OAH<0 the action is for heating, with OAH>0 it is for cooling.
COOLING (OSH>0): AUX output cut IN is OSS+OAH. Second compressor cut out is when the
temperature SETH+OAS.
1592006207 XB570L GB r1.1 23.03.2015
AUXILIARY RELAY CONFIGURATION
SECOND RELAY MANAGEMENT
AUXILIARY RELAY MANAGEMENT
XB570L 8/20