Carel ir33+ FMC, Быстрое руководство

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12
Status
Defrost
signal
End of Defrost by temperature or time
Comp. Capacity during defrost settable by:
cdF
Comp. OFF with Heater Management
Comp.
Capacity
Defrost Valve
Relay
Drain
Drain heater
AUX
Drain preheater
dH1
Drain postheater dH2
Heat Drip off
Hold
Drip off
time
max Pull Down
frequency fix at
150 Hz
Pull down
only if T > AH & cPd >1
H1 = 14 –› AUX = Drain
ENG
ir33+ wide Fullmotion - +040000055 - rel. 1.0 - 09.06.2014
3.5 Drain heater management
The AUX relay is configured as drain heater relay by H1 = 14 .
With the defrost request, the Fullmotion compressor changes speed to cdf.
The defrost relay is delayed for the time
dH1
.
At the end of the defrost, the Fullmotion compressor changes to normal control and the drain heater is still
pending for the time
dH2 , Drain postheat.
The following diagram describes a hot gas defrost with drain heater management.
Fig. 3.d
NB:
Evaporator fan management is based on the parameters F0/F1/F2/F3 .
During the dripping time dd and the drain postheat time Fd , the fan remains OFF.
See the section on Fan management.
Cod. Parameter UOM Dis. Type Def. Max Min
cdf Compressor frequency for hot gas defrost
Hz C I 140 255 0
dH1 Defrost valve delay
sec C I 180 999 0
dH2 Drain post heat
sec C I 180 999 0
dd Dripping time after defrost (fans off )
min C A 2 15 0
H1 Configure function of output AUX1
5 = pump down valve
7 = delayed compressor (see c11)
11 = reverse with neutral zone
12 = second compressor
13 = no function
14 = drain heater management
- C I 14 14 0
Tab. 3.e
3.6 Temperature Pull Down
The controller performs an automatic temperature Pull Down procedure every time the refrigeration unit
temperature rises above the high temperature threshold
AH .
The Pull Down procedure ends when the refrigeration unit temperature reaches the set point St .
The maximum Pull Down time is selected by parameter cPd .