1592023040 XM668D GB r1.1 2011.07.05.doc
XM668D
11/14
idF
6
Defrost interval.
0 to 120hours
It sets the time interval between the beginning of two
defrost cycles.
[EdF = in]:
it is the interval between 2 defrost;
[EdF = rtC]:
it is the safety interval in case of clock
alarm
[RtC – RtF]
.
[idF = 0]:
the defrost can be activated only manually, or
through RS485 or from external contact or from LAN.
MdF
45
(Maximum) duration for defrost.
0 to 255min
When
dPA
and
dPb
aren’t present, it sets the defrost
duration, otherwise it sets the maximum duration for
defrost.
dSd
0
Defrost start delay after request.
0 to 255min
Useful when different defrost start times are necessary
to avoid overloading the plant.
dFd
rt
Display during defrost.
rt; it; SEt; dEF
rt
= real temperature for
Lod
probe;
it
= initial temperature (reading when defrost start);
SEt
= set-point value;
dEF
= “dEF” label is visualized.
dAd
30
Display delay.
0 to 255min
Set the maximum time between the end of defrost and
the restarting of the real room temperature display.
Fdt
0
Drain down time after defrost.
0 to 255min
Time interval between reaching defrost termination
temperature and the restoring of the control’s normal
operation. This time allows the evaporator to eliminate
water drops that might have formed due to defrost.
The fan and the thermoregulation output are OFF
during this time.
dPo
n
Defrost at power-on.
n; Y
First defrost after start-up:
Y
= Immediately;
n
= after the
idF
time.
dAF
0.0
Defrost delay after continuous cycle.
0.0 to 24h00min (144)
Time interval between the end of the fast freezing cycle
and the following defrost related to it.
Format
: hours.10min,
resolution
: 10min.
FAN
FPA
P2
Fan probe A
nP(0); P1(1); P2(2);
P3(3); P4(4); P6(5)
First probe used for fan. If
[FPA = nP]
the regulation is
performed with real value of
FPb
.
FPb
nP
Fan probe B.
nP(0); P1(1); P2(2);
P3(3); P4(4); P6(5)
Second probe used for defrost. If
[FPb = nP]
the
regulation is performed with real value of
FPb
.
FPE
100
Virtual probe percentage (fan management).
0 to 100%
It defines the percentage of the
FPA
respect to
FPb
.
The value used to regulate room temperature is
obtained by:
value_for_defrost= (FPA*FPE + FPb*(100-FPE))/100
FnC
O-n
Fan operating mode.
C-n; C-Y; O-n; O-Y
C-n
= running with the solenoid valve, OFF during the
defrost;
C-Y
= running with the solenoid valve, ON during the
defrost;
O-n
= continuous mode, OFF during the defrost;
O-Y
= continuous mode, ON during the defrost.
Fnd
10
Fan delay after defrost.
0 to 255min
The time interval between the ending of the defrost and
the starting of the evaporator fans.
FSt
10.0
Fan stop temperature.
[-55.0°C to 50.0°C]
[-67°F to 122°F]
Evaporator probe temperature above which the fan is
always OFF.
FHY
1.0
Fan stop differential
[0.1°C to 25.5°C]
[1°F to 45°F]
When stopped, fan restarts when fan probe reaches
[FSt – FHY]
value of temperature.
tFE
n
Thermostatic fan functioning during defrost
n; Y
-
Fod
0
Fan activation time after defrost (without
compressor)
0 to 255min
It forces fan activation for the indicated time.
Fon
0
Fan ON time
0 to 15min
With
[FnC = C-n
or
C-Y]
(fan activated in parallel with
compressor), it sets the evaporator fan ON cycling time
when the compressor is off. With [
Fon = 0]
and [
FoF ≠
0]
the fan is always off, with [
Fon = 0]
and [
FoF = 0]
the fan is always off.
FoF
0
Fan OFF time
0 to 15min
With
[FnC = C-n
or
C-Y]
(fan activated in parallel with
compressor) it sets the evaporator fan off cycling time
when the compressor is off. With
[Fon = 0]
and
[FoF ≠
0]
the fan are always off, with
[Fon = 0]
and
[FoF = 0]
the fan are always off.
trA
UAL
Kind of PWM regulation
UAL; rEG; AC
UAL
= the output is at
FSA
value (manual value);
rEG
= the output is regulated with fan algorithm
described in fan section;
AC
= anti-sweat heaters control (require XWEB5000
system).
SOA
0
Manual value of the analog output
AMi to AMA
Value for the output if
[trA = UAL]
(0 to 100%).
SdP
30.0
Default Dew-Point value (or safety value in case of
XWEB link lost)
[-55.0°C to 50.0°C]
[-67°F to 122°F]
Default value of dew-point used when there is no
supervising system (XWEB5000). Used only if
[trA =
AC]
.
ASr
1.0
Differential for fan / offset for anti sweat heater.
[-25.5°C to 25.5°C]
[-45°F to 45°F]
trA = AC:
dew-point offset;
trA = rEG:
differential for modulating fan regulation.
PbA
5.0
Proportional band for modulating output.
[0.1°C to 25.5°C]
[1°F to 45°F]
Differential for anti-sweat heaters.
AMi
0
Minimum output for modulating output.
0 to AMA
Minimum value for analog output:
(0 to
AMA
).
AMA
100
Maximum output for modulating output.
AMi to 100
Maximum value for analog output:
(
AMi
to 100).
AMt
10
Time with fan at maximum speed or ON time for
relay on Anti-sweat regulation.
[10 to 60s] or
[10 to 60min]
trA = AC:
Anti-sweat heaters cycle period
;
trA = rEG:
Time with fan at maximum speed
.
During this time the fan works at maximum speed. If
intended for fan, the basetime is on seconds, for anti-
sweat regulation the basetime is on minutes.
ALARM
rAL
tEr
Probe for room temperature alarm.
nP; P1; P2; P3; P4; P6; tEr
It selects the probe used to signal alarm temperature.
