dixell ichill IC260L, User Manual

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1592015300 User manual iCHILL 200 L GB r1.3 09/09/2005
1. The compressors and the steps are turned off ( the compressor/s led is blinking, the defrost led is on)
2. Start the dF07 / 2 (half time) time counting;
3. The valve is activated;
4. Start the dF07 / 2 (half time) time counting.
The
4
th
phase start condition: if the thermoregulation or the dF14 parameters require to turn ON more than one compressor for circuit,
the delay on time between the compressors depends on the parameter dF16.
The partialization/s: if configured always OFF during the defrost cycle, the compressor is always 100%.
•
if dF14=1 (all the circuit #1 resources are forced to ON): during the defrost cycle the compressors and steps of the circuit #1 are
ON while, if dF14=0 , compressors and steps are thermoregulated.
•
if dF15=1 (all the circuit #2 resources are forced to ON): during the defrost cycle the compressors and steps of the circuit #2 are
ON while, if dF15=0 , compressors and steps are thermoregulated.
4
th
PHASE : Defrost ON
Parameter involved: dF17 (condensing fan management)
If dF17=0: The condensing fan are always off;
If dF17=1: The condensing fans start if the condensing temperature-pressure value is higher than dF18, they will following the
normal chiller thermoregulation algorithm.
ATTENTION during the defrost cycle, both for chiller and the heat pump modes, the fan are controlled with the condensing probe even
if the evaporator probe is present and configured.
The 4
th
phase lasts at least for the dF04 time counting and can terminate for these conditions:
1. If
dF02=0:
The combined NTC probe value is higher than dF11 of the 1
st
circuit;
The combined NTC probe value is higher than dF13 of the 2
nd
circuit;
When the condensing-temperature probe/s is/are higher than dF03 parameter value.
2. If dF02=2: the dF05 counting, maximum defrost timeout, is expired, step on 5
th
PHASE ;
3. If dF02=3, if the end defrost digital input is deactivated, step on 5
th
PHASE .
5
th
PHASE : Inversion valve management Par. dF08 (OFF compressor after defrost cycle)
If dF08 = 0 the valve is turned without stopping the compressors, the defrost ends and all the regulation restarts, the defrost led in
heat pump is off).
If dF08 <> 0:
1. All the compressors and steps are turned off ( the compressor leds are blinking and the defrost led is on)
2. Start the dF08 / 2 (half time) time counting;
3. Inversion valve de-activated
4. Start the dF07 / 2 (half time) time counting; all the regulation restarts and the defrost led in heat pump is off).
38.7 O
THER
I
NFORMATION ABOUT THE DEFROST
FOR ALL THE UNIT WITH SAME DEFROST FOR THE TWO CIRCUITS
If the unit is configured with one condenser see parameter FA05:
0= common condenser;
1= separated condensers.
For FA05=0, common condenser, the defrost of the two circuits starts at the same time.
ATTENTION
Before starting the 3
rd
phase, the dF06 counting, time delay between two circuits defrost, must be expired.
ATTENTION
If the defrost ends because of the dF05 counting (Maximum defrost time) and the dF02 configuration or with the end defrost contact, the
bottom display will show, alternated with the normal measurement value, the label
b1dF (circuit #1) or b2dF (circuit #2) labels to
indicate the defrost end alarms.
38.8 D
EFROST
P
ARAMETER
D
ESCRIPTION
ATTENTION IT IS NOT POSSIBLE TO DO MODIFY THE dF PARAMETERS WHEN THE DEROST CYCLE IS RUNNING.
dF01 Defrost mode
0 = Defrost not enabled;
1 = Temperature/pressure defrost. The dF09, time delay to the defrost, starts when the temperature decreases under the dF02 setpoint.
The Defrost cycle end is determined by temperature/pressure.
2
= Time duration defrost. The dF09, time delay to the defrost, starts when the temperature decreases under the dF02 setpoint. (see
start probe par. dF24). The Defrost cycle end is determined by the maximum duration dF05.
3 = Defrost from digital input. The dF09, time delay to the defrost, starts when the temperature decreases under the dF02 setpoint. (see
start probe par. dF24) The Defrost cycle end is determined by the active digital input.
dF02 Temperature / pressure to begin the time counting to next defrost.
It allows to program a setpoint under which the dF09 starts counting.
dF03 Temperature / pressure to end the defrost.
It allows to program a temperature/pressure setpoint value to determines the end of the defrost when the probe value is rising.
dF04 Minimum duration of the defrost
It determines the minimum defrost time duration after starting the defrost itself even if the conditions are not more satisfied.
dF05 Maximum duration of the defrost
If dF01=2, it determines the maximum duration of the defrost and even if, for the other cases, the end defrost condition are still to be
satisfied.
dF06 defrost delay time between the 1
st
and the 2
nd
circuit.