1592015610 User manual IC200D EVO GB rel1.0 10.11.2015_rev10
IC200D
107/192
In the heat recovery digital input is active and if the heat recovery temperature is lower than the first valve
activation threshold, the recovery valve will be activated on the circuit switched on.
If both circuits are working, first is activated the heat recovery valve of circuit 1 and then the heat recovery
valve of circuit 2.
42.2 UNIT WITH TWO SEPARATE IDRAULIC CIRCUITS (rC01=1)
HEAT RECOVERY: CIRCUIT CONFIGURED WITH ONLY ONE COMPRESSOR
If:
chiller unit is on
at least a compressor is ON
condenser temperature / pressure are lower than rC06
the heat recovery starts if the the digital input configured as recovery circuit 1 or circuit 2 is active and, in
case of use of the recovery probe, if the temperature is below the rC10 set point (both conditions must be
fulfilled); in this condition the relay configured as recovery valve circuit 1 or circuit 2 is activated.
When the heat recovery request is not active, the relay configured as recovery valve circuit 1 or circuit 2 will
be deactivated.
When the unit enters in recovery operation, the recovery state is maintained for a minimum time set in
parameter rC04.
When the heat recovery is deactivated, next request will not be fulfilled until the end of time set in the RC05
(counted from the moment of exit the recovery operation).
HEAT RECOVERY: CIRCUIT CONFIGURED WITH MORE THAN ONE COMPRESSOR
Enter in heat recovery
If:
chiller unit is on
at least a compressor is ON
condenser temperature / pressure are lower than rC06
the heat recovery starts if the digital input configured as recovery circuit 1 or circuit 2 is active and, in case of
use of the probe recovery, if the temperature is below the rC10 set point (both conditions must be fulfilled):
if the heat recovery request comes when the number of compressors switched on is lower than
the maximum available, the recovery valve is activated with delay of RC02 seconds; during this
delay the switching on of more compressors of the circuit, if required by the regulation, is
inhibited.
Once the valve is turned on, any additional compressors required by regulation chiller
compressors will be delayed of rC03 seconds after the valve
• if the heat recovery request comes when the maximum number of available compressor is
switched on, a compressor is switched off and a delay time rC02 starts counting; once elapsed, the
heat recovery valve is activated, condenser fan is switched off (if rC09=1) and starts conting a delay
rC03 after wich the compressor will be re-started (if CO02 time is elapsed).
Exit from heat recovery
If:
o
Heat recovery digital input is de-activated or heat recovery temperature rise over RC10 +
RC13, when the number of compressors switched on is lower than the maximum available
for that circuit, recovery valve of circuit 1 or circuit 2 is switched off after a delay of rC02
seconds; during rC02 delay the switching on of more compressors of the circuit, if required
by the regulation, is inhibited.
Once the valve is turned off, any additional compressors required by regulation chiller
compressors will be delayed of rC03 seconds after the valve.
o
Heat recovery digital input is de-activated or heat recovery temperature rise over RC10 +
RC13 when the maximum number of available compressor for that circuit is switched on,
then:
a compressor will be switched off
starts counting rC02 delay, after that recovery valve is switched off
after rC03 delay the compressor will be re-started (if CO02 time is elapsed).
