1592001850 XC660D GB r3.4 04.09.2017.docx XC660D
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P4:
probe P4 (term. 22-23)
17.7 Fans regulation
Pb
Proportional band zone width
(0.1÷30.0°C; 1÷50°F; 0.1÷10.0bar, 1÷150PSI;
10÷1000KPA).
NOTE: Set the dEU par. and the target set point for fans before setting this
parameter.
The band is symmetrical compared to the target set point, with extremes: SETF+Pb/2 ÷
SETF -Pb/2. The measurement unit depends on the dEU par.
ESF
Energy saving value for fans:
(-20÷20bar; -50÷50°C) this value is add to the fans set
point.
PbES Band offset for fan regulation in ES
(-50.0÷50.0°C; -90÷90°F; -20.0÷20.0bar; -
300÷300PSI; -2000÷2000KPA). During energy saving
Fon
Time delay between the insertion of two different fans
(0÷255sec).
FoF
T
ime delay between switching off of two different compressors
(0÷255 sec)
LSF
Minimum set point for fan
: The measurement unit depends on dEU parameter. It sets
the minimum value that can be used for the set point, to prevent the end user from setting
incorrect values.
HSF
Maximum set point for fan
: The measurement unit depends on dEU parameter. It sets
the maximum acceptable value for set point.
17.8 Alarms
– compressor section
PAo: Alarm probe exclusion at power on.
it is the period starting from instrument switch on,
before an alarm probe is signaled. (0÷255 min). During this time if the pressure is out of
range all the compressor are switched on.
LAL
:
Low pressure (temperature) alarm
– compressor section
: The measurement unit
depends on dEU parameter: (PA04 ÷ HAL bar; -50.0÷HAL °C; PA04÷HAL PSI; -58÷HAL
°F) It’s
independent
from the set point. When the value
LAL
is reached the A03C alarm
is enabled, (possibly after the
tAo
delay time).
HAL
:
High pressure (temperature) alarm
– compressor section
: The measurement unit
depends on dEU parameter: (LAL ÷ PA20 bar; LAL÷150.0 °C; LAL÷PA20 PSI; LAL÷302
°F). It’s
independent
from the set point. When the value HAL is reached the A04C alarm
is enabled, (possibly after the
tAo
delay time).
tAo
:
Low and High pressure (temperature) alarms delay
– compressor section
: (0÷255
min) time interval between the detection of a pressure (temperature) alarm condition and
alarm signaling.
ELP
Electronic pressure switch threshold:
(-50°C÷STC1; -58°F÷STC1; PA04÷STC1);
Pressure / Temperature value at which all the compressors are switched off. It has to be
set some degrees above the mechanical low pressure switch value, in order to prevent
mechanical low pressure activation.
2LAL
:
Low pressure (temperature) alarm, compressor section circuit 2
: The measurement
unit depends on dEU parameter: (3P04 ÷ 2HAL bar; -50.0÷2HAL °C; 3P04÷2HAL PSI; -
58÷2HAL °F) It’s
independent
from the set point STC2. When the value
2LAL
is reached
the C2LA alarm is enabled, (possibly after the
2tAo
delay time).
2HAL
:
High pressure (temperature) alarm, compressor section circuit 2
: The measurement
unit depends on dEU parameter: (2LAL ÷ 3P20 bar; 2LAL÷150.0 °C; 2LAL÷3P20 PSI;
LAL÷302 °F). It’s
independent
from the set point STC2. When the value 2HAL is reached
the C2HA alarm is enabled, (possibly after the
2tAo
delay time).
2tAo
:
Low and High pressure (temperature) alarms delay, compressor section circuit 2
:
(0÷255 min) time interval between the detection of a pressure (temperature) alarm
condition and alarm signaling.
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