Operating instructions
cod. 1592001300
1592001300 XC440C gb r1.0 07.06.2004.doc
rel. 1.0
Page
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E.I. 3 compressors with following capacity: 10, 20, 40 HP. The parameters have to be set
in these way: PC1=10, PC2=20, PC3=40.
FtyP: Freon Type: set the kind of freon used in the plant
r22 = R22; r404= R404A ; 507= R507; 134=134; r717=r717 (ammonia)
rty:
Type of regulation (see par. 13 Type of regulation)
db = neutral zone,
Pb = proportional band.
Sty Compressor
rotation
YES = rotation: this algorithm distributes the working time between the various loads to
ensure even run times.
no = fixed sequence: the compressors are enabled and disabled in fixed sequence: first,
second etc.
rot
Fans rotation
YES = rotation: this algorithm distributes the working time between the various loads to
ensure even run times.
no = fixed sequence: the compressors are enabled and disabled in fixed sequence: first,
second etc.
12.2 Probes configuration
12.2.1
Probe configuration
Pbc: Probe 1 setting. Cur = 4 ÷ 20 mA probe; ntc = NTC probe, Ptc = NTC probe.
PA04: Adjustment of read out for the Probe 1 (used only if Pbc=Cur). corresponding to 4mA
input signal, given by the suction probe (0 ÷31 bar or 0÷450 PSI or 0÷3100KPA)
Warning: set a value correspondent to absolute pressure. If the transducer measures
relative pressure increase the range of 1 bar.
See also par. 3.2 How to set the range of the pressure probes
E.I. PP11 relative pressure transducer, range -0.5÷12.0 bar. PA04=0.5 (-0.5+1);
PA20=12.0 (11+1).
PP30 relative pressure transducer, range: 0÷30bar. PA04=1; PA20=31.
PA20: Adjustment of read out for the Probe 1 corresponding to 20mA input signal, given by
the suction probe (0 ÷ 31.0 bar or 0÷450 PSI or 0÷3100KPA)) SEE THE WARNING FOR
PA04.
CAL: Probe 1 calibration (-12.0÷12.0 bar; -12.0÷12.0°C or -20÷20 PSI/°F)
12.3 Others inputs configuration
i1c Configurable digital input polarity (terminals 3-4):
oP: the digital input is activated by opening the contact;
CL: the digital input is activated by closing the contact.
i1F
Configurable digital input polarity functions (terminals 3 - 4)
ES = Energy saving; oFF = instrument shut down; LLi = liquid level alarm
did Configurable digital input delay: (enabled only if i1F=LL) 0÷255min
ALIP: Alarm input for compressors and fans polarity
oP: the digital input is activated by opening the contact;
CL: the digital input is activated by closing the contact.
ALMr Manual reset of alarms for compressors and fans.
