F
Operating instructions
cod. 1592001330
1592001330 XC642C GB r1.0 07.06.2004.doc
rel. 1.0
Pa. 10 / 21
12. List of parameters
12.1 PLANT DIMENSIONING AND TYPE OF REGULATION.
oA1, oA2, oA3, oA4, oA4 Outputs 1- 4 configuration
: by means of these parameters the plant can be
dimensioned according to the number and type of compressors and/or fans and the number of steps for
each one.
Each relay according to the configuration of the oA(i) parameter can work as:
-
Compressor
: oAi = cPr,
-
Step:
oAi = StP
-
Injection liquid valve:
oAi = Lin
-
Alarm:
oAi = ALr
-
Not used:
oAi = nu
NOTE:
also the
“FAn” value is present. This value
must not
be used..
COMPRESSORS CONFIGURATION
The regulation is
always
performed by the
P1
Probe.
With
step compressors
the output of compressor has to be set before the output of the step.
ES. C
ompressor with 3 steps:
oA1 = cPr, oA2= StP, oA2 = StP.
If an oAi set as step without any previous oAi set as cPr the configuration alarm “CStP” will be
activated.
StP:
valve outputs polarity:
polarity of the outputs for capacity valves. It determines the state of the
relays associated with the capacity valves (only for homogeneous and stepped-capacity
compressors):
oP
=valve enabled with open contact;
cL
= valve enabled with closed contact.
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.15):
db
= neutral zone,
Pb
= proportional band.
Sty
Activation: type of sequence
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.
12.1.1
Probe 1 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
Ex.
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)
FcAL
:
Probe 2 calibration
(-12.0÷12.0 bar; -12.0÷12.0°C or -20÷20 PSI/°F)
12.2 OTHERS INPUTS CONFIGURATION
SEP
:
Polarity of Low pressure-switch alarm
(terminals 9-10)
oP
=alarm with open contacts;
cL
= alarm with closed contact
HPP
:
Polarity of High pressure-switch alarm
(terminals HP)
oP
= alarm with open contacts;
cL
= alarm with closed contact
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)
