Sty Compressors rotation enabling
YES = rotation enabled : this algorithm distributes the working time between the various
compressors to ensure even run times.
no = fixed sequence: the compressors are enabled and disabled in fixed sequence: first,
second etc.
NOTE: If a relay is set as inverter is always started as first and switched off as last. In
any case, if it is locked because of safety timers, it can be started to maintain the pressure
in the regulation band.
rot Fan rotation enabling
YES = rotation enabled: this algorithm distributes the working time between the various
fans to ensure even run times.
no = fixed sequence: the fans are enabled and disabled in fixed sequence: first, second
etc.
17.2 Probes configuration
Probes can be used in different ways according to plant features, as described in the following
table:
17.2.1 Suction probe configuration
P1c: Suction probe setting (probe 1):
nP = not used: don’t set it;
Cur = 4 ÷ 20 mA pressure transducer; use term. 6(+), 5 (in); 10 (gnd) if present
tEn = 0.5÷4.5V ratiometric pressure transducer; use term. 4(+), 5 (in); 10 (gnd)
ntc = NTC 10K probe; use term. 4-5
PA04: Adjustment of read out for the Probe 1 (used only if P1c=Cur or tEn). Corresponding
to 4mA or 0.5V input signal, given by the suction probe (-1.0 ÷ PA20bar; -15÷PA20PSI;
-100 ÷ PA20KPA)
E.I. PP11 relative pressure transducer, range -0.5÷11.0 bar. PA04=-0.5; PA20=11.0
PP30 relative pressure transducer, range: 0÷30bar. PA04=0.0; PA20=30.0.
PA20: Adjustment of read out for the Probe 1 corresponding to 20mA or 4.5V input signal,
given by the suction probe (PA04 ÷ 61.0BAR; PA04 ÷ 885PSI; PA04 ÷ 6100KPA).
CAL: Probe 1 calibration: the range depends on the dEU parameter:
dEU=bar or °C: -12.0÷12.0;
dEU=PSI or °F: -200÷200;
dEU=kPA: -999÷999;
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