1592015820 User manual IC260_261L_D DUO FW1.9 rel. 1.0
Pag. 100 of 149
UNIT WITH BOTH THE CIRCUITS RUNNING
If recovery function is enabled, if the condenser temperature/pressure condition are within the limits the
circuit #1 starts the recovery (recovery valve #1 on) when the digital input #1 is activated and the circuit #2
starts the recovery (recovery valve #2 on) when the digital input #2 is activated.
After starting, the recovery function will run at least for the time set in parameter rC04 (minimum time with
recovery on).
Between the end of a recovery cycle and the next start the unit waits the time set in Par. rC05 before starting
it again.
RECOVERY START–STOP OF THE CIRCUITS 1 AND 2 CONFIGURED WITH ONE STEP EACH
Both for recovery start or stop, the delay time rC02 and rC03 are not counted and the recovery valve is
immediately turned on or off.
RECOVERY START OF THE TWO CIRCUITS CONFIGURED WITH MORE THAN ONE CAPACITY STEP
Circuits 1 and 2 configured with more than one step of power (eg each circuit with three compressors), if the
thermoregulation requires to turn on one or more resources and the recovery is activated from the digital
input the unit turns on only one step and then waits the rC02 delay (this delay keep off all the other steps
after the recovery is started). After the delay the recovery valve is turned on and, after the rC03 time (this
delay keeps off all the other steps after the recovery is started), the other resources if necessary are turned
on.
RECOVERY STOP OF THE TWO CIRCUITS CONFIGURED WITH MORE THAN ONE CAPACITY STEP
Circuits 1 and 2 configured with more than one step of power (Eg. each circuit with three compressors). After
the rC04 time delay (minimum on time of the recovery function when activated) if the digital input of the
recovery is not active the units stops the new resources for the time set in rC02. After this delay the recovery
valve is turned off and the regulation restarts with its normal running condition.
RECOVERY START OF THE TWO CIRCUITS WITH ALL THE CAPACITY STEPS ACTIVATED
When the system is running with 100% (Eg. all the three compressor of a circuit are on) of power and the
digital input start the recovery function: before turning on the recovery valve one of the step (depending on
the time running hours), is turned off for the time set in rC02. After rC02 the recovery valve is turned on.
Then, after the rC03 time (this delay keeps off all the other steps after the recovery is started) the resource
forced off if necessary is turned on again.
RECOVERY STOP OF THE TWO CIRCUITS WITH ALL THE CAPACITY STEPS ACTIVATED
When the system is running with 100% (Eg. all the three compressor of a circuit are on) of power and the
digital input stop the recovery function: after the rC04 time delay (minimum on time of the recovery function
when activated) and before turning off the recovery valve, one of the step is turned off for the time set in
rC02. When the delay is expired the unit turns off the recovery valve and and the regulation restarts with its
normal running condition.
ATTENTION:
For both the circuits: when the compressor are off because of the thermoregulation and the digital input of
the recovery function is active, the recovery valve is disabled.
46. CONDENSER TEMPERAURE / PRESURE CONDITION TO
ENABLE/DISABLE THE RECOVERY CYCLE
The recovery can be disabled depending on the condenser condition to avoid a possible high pressure
alarm. The function can be executed by programming the analogue input as condenser transducer 1 or 2
(Par
CF07=0
temperature control or
CF07= 1
pressure control).
FUNCTIONING
46.1 RECOVERY DISABLED
With the recovery function is activated: if the temperature/pressure is equal or higher than the set rC06 (limit
of the recovery cycle) the recovery cycle, of the circuit detected by transducer, is disabled. When the
recovery is disabled the bottom display shows the following blinking icons:
b1rC
= for circuit 1,
b2rC
= for
circuit 2.
