Light And Aux Outputs; Defrost - Carel ir33+ small wide User Manual

ENG

6.8 Light and Aux outputs

If AUX1 or AUX2 is confi gured as a light or auxiliary output at power on,
the output retains the same status as when previously powered down.
The light or AUX output can be activated by the scheduler: this is set
using parameter H8. For the on/off day and time settings, see chapter 3.
Par. Description
H8 Output switched with scheduler
0 = Light; 1= AUX
H9 Set point variation with scheduler
0/1 = no/yes
St Set point
r4 Automatic night-time set point variation
ton Light/aux on time
toF Light/aux off time
ON
CMP,
FAN
OFF
SET
St + r4
St+rd
ton
Key
CMP, Compressor, fan
FAN
St Set point
ton Light/aux on time
t Time

6.9 Defrost

Introduction
Parameters td1 to td8 can be used to set up to 8 defrost events, managed
by the controller's clock (RTC).
Press Set to set the sub-parameters, as shown in the table:
Par. Description
td1...8 Defrost 1 to 8 (press Set)
d__ Defrost 1 to 8 – day
h__ Defrost 1 to 8 – hour
n__ Defrost 1 to 8 – minute
Remember that sub-parameter "d_" of td1(td2) defi nes the defrost day
as follows:
d_ = Defrost– day
0 = event disabled
1...7 = Monday to Sunday
8 = Monday to Friday
ir33+ can manage the following types of defrost, based on the setting of
parameter d0:
0. heater (located near the evaporator) by temperature;
1. hot gas by temperature;
2. heater by time;
3. hot gas by time;
4. heater by time with temperature control.
The defrost can end by temperature, in which case the defrost probe
Sd must be installed, or by time. In the fi rst case, the defrost ends when
ir33plus +0300028EN rel. 1.1 - 05.05.2017
Def Min Max UOM
0 0 1
0 0 1
0.0 r1 r2
3.0 -20 20
- - -
- - -
Tab. 6.h
H9=1
Sv
t
toF
Fig. 6.l
r4 Automatic night-time set point
variation
Sv Virtual probe
toF Light/aux off time
Def Min Max UOM
- - - -
0 0 11 day
0 0 23 hour
0 0 59 minute
9 = Monday to Saturday
10 = Saturday & Sunday
11 = every day
the defrost probe Sd exceeds the end defrost value dt1 or the time dP1
has elapsed, in the second case when the defrost procedure exceeds
the maximum time dP1. At the end of the defrost, the dripping stage
may begin (if dd>0), during which the compressor and the fans are
off , followed by the post-dripping stage (if Fd>0), during which control
resumes with the fans off . The type of display on user terminal and the
remote display during the defrost can be selected by setting parameter
d6.
-
Par. Description
d0 Type of defrost
-
0 = Heater by temperature
1 = Hot gas by temperature
°C/°F
2 = Heater by time (Ed1, Ed2 not shown)
°C/°F
3 = Hot gas by time (Ed1, Ed2 not shown)
-
4 = Heater by time with temperature control
-
(Ed1, Ed2 not shown)
dt1 End defrost temperature probe 2
dt2 End defrost temperature probe 3 (aux eva-
porator)
dt3 End defrost temperature probe 4
dP1 Maximum defrost duration
dP2 Maximum aux evaporator defrost duration
d6 Terminal display during defrost
0 = Temperature alternating with dEF
1 = Display disabled
2 = dEF
Note: dt3 is as masked parameter, and can be made visible using
the VPM tool.
dt1
Sd
ON
DEF
OFF
ON
DEF
OFF
ON
DEF
OFF
Key
t Time
Tab. 6.i
dt1 End defrost temperature
probe 2
dP1 Maximum defrost duration
Heater defrost by time with temperature control (d0=4) is used to
activate the defrost output only if the evaporator temperature (Sd) is less
than value of the parameter dt1, and ends after the time defi ned by dP1.
This function is useful for energy saving.
32
Def Min Max UOM
0 0 4
4 -5 200 °C/°F
4 -5 200 °C/°F
4 -5 200 °C/°F
30 1 250 min/s
30 1 250 min/s
1 0 2
t
d0 = 0, 1
t
d0 = 2, 3
t d0 = 4
dP1 t
Fig. 6.m
Sd Defrost probe
d0 Type of defrost
DEF Defrost
-
-
Tab. 6.j