Dynamic Setpoint Suction - Emerson XC1008D Installing And Operating Instructions

The measurement unit depends on C45 parameter. AF2 is always added to the set point SETF1.
When the value SETF1+AF2 is reached the "High alarm – Condenser 1" is enabled, (possibly after
the AF3 delay time)
AF3 Low and High fan pressure (temperature) alarms delay – circuit 1 (0÷255 min) time interval
between the detection of a pressure (temperature) alarm condition and alarm signalling.
AF4 Compressors off with pressure (temperature) alarm for fans– circuit 1
no = compressors are not influenced by this alarm
yES = compressors are turned off in case of high pressure (temperature) alarm of fans
AF5 Interval between 2 compressors turning off in case of high pressure (temperature) alarm for
fans – circuit 1 (0 ÷ 255 min)
AF6 High pressure-switch intervention numbers – circuit 1: (0÷15). Every time the pressure-switch is
activated all the compressors of the circuit 1 are turned off and the fan turned on. If the high
pressure-switch is activated AF6 times in the AF7 interval, the compressors of the first circuit are
switched off and the fans on, only the manually unlocking is possible.
AF7 High pressure-switch interventions time (0÷255 min) – circuit 1 Interval, linked to the AF6
parameter, for counting interventions of the high pressure-switch.
AF8 Fans on with delivery probe faulty – circuit 1 (0 ÷ 15)
AF9 Low pressure (temperature) alarm for fans – circuit 2: (0.10 ÷ 30.00bar; 0.0 ÷ 100.0°C; 1÷430
PSI; 1÷200.0°F; 10 ÷ 3000KPA)
The measurement unit depends on C45 parameter. AF9 is always subtracted to the set point
SETF2. When the value SETF2-AF9 is reached the "Low alarm – Condenser 2" is enabled, (possibly
after the AF11 delay time)
AF10 High pressure (temperature) alarm for fans– circuit 2: (0.10 ÷ 30.00bar; 0.0 ÷ 100.0°C; 1 ÷ 430
PSI; 1 ÷ 200.0°F; 10 ÷ 3000KPA)
The measurement unit depends on C45 parameter. AF10 is always added to the set point SETF2.
When the value SETF2+AF10 is reached the "High alarm – Condenser 2" is enabled, (possibly after
the AF11 delay time)
AF11 Low and High fan pressure (temperature) alarms delay – circuit 2 (0÷255 min) time interval
between the detection of a pressure (temperature) alarm condition and alarm signalling.
AF12 Compressors off with pressure (temperature) alarm for fans– circuit 2
no = compressors are not influenced by this alarm
yES = compressors are turned off in case of high pressure (temperature) alarm of fans
AF13 Interval between 2 compressors turning off in case of high pressure (temperature) alarm for
fans – circuit 2 (0 ÷ 255 min)
AF14 High pressure-switch intervention numbers – circuit 2: (0÷15). Every time the pressure-switch is
activated all the compressors of the circuit 2 are turned off and the fans turned on. If the high
pressure-switch is activated AF14 times in the AF15 interval, the compressors of the second circuit
are switched off and the fans on, only the manually unlocking is possible.
AF15 High pressure-switch interventions time (0÷255 min) – circuit 2 Interval, linked to the AF14
parameter, for counting interventions of the high pressure-switch.
AF16 Fans on with delivery probe faulty – circuit 2 (0 ÷ 15)
AF17 Relay activated in case of pressure (temperature) alarms of fans
nu = no relay activation, only visual signalling; Alr: all the C(i) outputs set as ALr; ALr1: all the C(i)
outputs set as ALr1, ALr2: all the C(i) outputs set as ALr2
6.1.15 Dynamic Setpoint Suction (o1-o8)
O1 Dynamic compressor set point function enabled - circuit 1
no = standard regulation
yES = the SETC1 varies according to the setting of O2, O3, O4.
WARNING the dynamic set point requires a dedicated probe, so it's necessary one of the aux probes
is set for this function in other words AI17 or AI20 or AI23 or AI27 has to be set as otA1.
NOTE: if more than one probe is used for the optimization of the suction set point, only the higher
temperature is considered.
O2 Maximum compressor set point - circuit 1
compressor set point used in the dynamic set point function. The measurement unit depends on C45
parameter.
O3 External temperature for maximum set point O2- circuit 1
the temperature detected by the external AUX probe, at which the maximum set point is reached.
O4 External temperature for standard set point– circuit 1 (O3÷150°C O3÷302°F)
1592021021 XC1008-1011-1015D GB A5 r.1.5A 12.10.2009
(SETC1÷CP3) It sets the maximum value of
(-40÷O4 °C /-40÷O4°F) It's
XC1008-1011-1015D 34/66