1592015820 User manual IC260_261L_D DUO FW1.9 rel. 1.0
Pag. 91 of 149
41.3 Sanitary Water Second Set Point
The sanitary water second set point can enabled by time bands (ES19..ES33 parameters) or digital input
properly configured.
In case of sanitary water second set point enabled by time bands, the Ichill must have internal clock.
Par. ES25 – ES31
0= Function disabled
1= 1
st
period enabled
2= 2
nd
period enabled
3= 1
st
and 2
nd
periods enabled
4= 3
rd
period enabled
5= 1
st
and 3
rd
periods enabled
6= 2
nd
and 3
rd
periods enabled
7= 1
st
, 2
nd
and 3
rd
periods enabled
Inside the time band or when the digital input is active to the sanitary water set point is applied an offset
(parameter ES32) and the new differential for the regulation is ES33.
41.4 Sanitary Hot Water Production: Valves In Water Circuit ___ Fs01=1 (Air/Water,
Water/Water Unit)
41.4.1 - Sanitary hot water operation when the unit is producing hot water
When sanitary hot water production is required (and it has priority), the sequence of operation is the
following:
the sanitary water pump is switched on
after a delay of FS27 seconds, sanitary valve 1 is swithed on
after a delay of FS10 seconds the sanitary valve 2 is switched off
Sanitary hot water is produced until the FS03 set-point is reached.
Once the sanitary water set-point is reached, the sequence of operation is the following:
sanitary valve 2 is switched on
after a delay of FS10 seconds the sanitary water valve 1 is switched off
after a delay of FS28 seconds the sanitary water circulation pump is switched off
Condenser fans are managed normally.
The defrost takes priority over the production of sanitary water.
If the controller determines the need for a defrosting cycle during the production of sanitary water, the Ichill
stops the sanitary hot water operation to activate the defrost procedure:
all compressors and heaters are stopped
the sanitary valve 2 is switched on
after the FS10 delay sanitary water valve 1 is switched off
after a delay of FS28 seconds the sanitary water pump is switched off
The defrost can now start as per the normal procedure.
At the end of the defrosting cycle:
If there is a need to produce sanitary water, the compressors and any heating elements will be switched
on. After the FS11 delay from the end of the dripping phase, sanitary water valve 1 is switched on and,
after the FS10 delay, sanitary water valve 2 is switched off.
If there is no need to produce sanitary water, the controller continues with normal heat regulation.
