Carel iJW handleiding
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iJW +0300103EN rel. 1.1 - 31.03.2025
Index
7.12.3 Advanced defrosting features
Maximum interval between consecutive defrosts (par. dI)
Code Description Def Min Max UOM User User terminal
dl Maximum interval between consecutive defrosts 8 0 240 hours S YES
Tab. 7.j
Parameter dI is a safety parameter used to perform cyclical defrosts every “dI” hours, event without the real time clock (RTC). At
the start of each defrost, irrespective of the duration, an interval starts being counted. If this interval exceeds dI without a defrost
being performed, one is started automatically. The count is always active even if the controller is OFF.
Example.
If the defrost programmed by time td3 is not carried out due to a fault in the RTC, a new defrost starts after the safety time dI.
300086_058_R01
t
td1
DEF
ON
OFF
td2
td3
dl
Ref. Description
dl Maximum interval between consecutive defrosts
td1 - td3 Scheduled defrosts
t time
DEF Defrost
Fig. 7.w
Notice:
• if the interval dI expires when the controller is OFF, a defrost will be performed when it is switched ON;
• to ensure correct defrosting, the interval between defrosts must be greater than the maximum defrost duration, increased by
the dripping and post-dripping times.
Notice: to avoid unwanted defrosts controlled by the timer, set parameter dI=0 (defrosts from keypad, RTC, compressor
running time or digital input only).
Running time defrost (par. d10, d11)
Running time is a special function that determines when the refrigeration unit needs defrosting. Specifi cally, it is assumed that if
the compressor remains on for a certain period (d10) and the evaporator temperature measured by probe Sd remains constantly
below the threshold (d11), there is possibly ice on the evaporator and therefore defrosting is required. The time is reset if the
temperature returns above the threshold.
Code Description Def Min Max UOM User User terminal
dt1 End defrost temperature (read by Sd) 4/ 39.2 -50 /-58 50/122 °C/°F S YES
dt2 Auxiliary evaporator end defrost temperature (read by Sd2) 4/ 39.2 -50 /-58 50/122 °C/°F S YES
d10 Compressor ON time for running time defrost
0 = function disabled
0 0 240 min S NO
d11 Defrost temperature threshold in running time mode -50 /-58 -50 /-58 50/122 °C/°F S NO
300100_156_R02
d10
t
t
t
ON
Sd
DEF
OFF
dt1
d11
ON
CMP
OFF
Ref. Description
Sd Defrost probe
t time
DEF Defrost
CMP Compressor
Fig. 7.x
Defrost at each compressor start
With defrosts controlled by temperature, if the evaporator temperature is lower than d11 when there is a cooling request, pre-
ventive defrosting is required before starting the compressor. This avoids starting the compressor and then stopping immedi-
ately afterwards, thus reducing the number of compressor starts.
Notice: this condition is not verifi ed the fi rst time the compressor is started after switching the unit on.
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Productinformatie
| Merk | Carel |
| Model | iJW |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 14964 MB |
