Carel Hecu handleiding
Handleiding
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Hecu +0300023EN rel. 1.2 - 14.12.2021
During a washing cycle, the following conditions are set:
• Oil recovery washing: ON
• Smooth Line: OFF
• P3: 0K
• P7: -10K
• St: -50°C
The following diagram explains operation and control of the electronic
expansion valve and the superheat set point:
t
t
t
t
t
EEV position
EEV Max opening
Cabinet SH
Cabinet SH
setpoint OK
ON
C1 Washing
C2 Washing
C3 Washing
OFF
ON
OFF
ON
OFF
t1
t1= time ON td= Fixing time function
td td td
t1 t1
Legende:
Fig. 6.s
Washing of individual cabinets can be confi gured exclusively in sequential
mode.
tON is the duration of each single washing cycle.
“N. of washing per day in each evap.” is the number of washing cycles per
day for each evaporator.
Fixing time is the transition time at the end of each single washing cycle
to keep the system in stable conditions.
Digital output for cabinet washing
The “Hecu wash” function uses a digital output to activate a “wash” cycle
on evaporators managed by third-party controllers.
To activate this function, the evaporators with MPX/UltraCella
controllers must not be enabled; go to screen Fab15 and enable
washing, as shown below:
Then select the digital output used on screen Faa68.
The digital output will be used by third-party controllers (evaporators)
to activate cabinet set point compensation: for example from 5°C to
-50°C. This action will open the expansion valve, while superheat control
remains active to avoid the backfl ow of liquid in the unit’s suction line.
The number of washes is selected on the following screen.
Notice: this function is less eff ective than the one provided by Carel
via serial connection to the evaporators managed by MPXPRO and
UltraCella controllers.
Compressor “ready” digital output
A digital output can be selected on screen Baccm and is activated when
the compressor is “ready”. This means that it is capable of delivering its
cooling capacity.
On stand-alone units it can be used as a cabinet “control” digital input to
improve control/synchronisation between the condensing unit and the
evaporators.
The function is NOT active when:
• The compressor has stopped due to the set times (minimum Off or
between starts)
• The compressor stopped due to cut-off
• On LT units, the compressor is stopped due to the DSS function
• The compressor has stopped due to an alarm, with the following
exceptions (to prevent the unit from staying off ):
– Low suction pressure alarm
– Low SH
Evaporator request
To roughly synchronise the condensing unit with evaporators managed
by third-party controllers (for example when these are defrosting).
A digital input can be confi gured (on screen Baadh). This means that the
compressor does not start until the DI is activated, even if the suction
pressure is higher than the set point.
Bekijk gratis de handleiding van Carel Hecu, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Carel |
| Model | Hecu |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 10743 MB |
