Technical data

Ichill 200CX EVO rev 1.1 14/11/2013
Pag. 80 of 151
If solar panel flow switch is active, solar panel regulation is disabled; heating and cooling regulation proceed
normally.
40.3 Domestic hot water Second Set Point
The domestic hot water second set point can enabled by time bands (ES19..ES33 parameters) or digital
input properly configured.
In case of domestic hot 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 domestic hot water set point is applied an offset
(parameter ES32) and the new differential for the regulation is ES33.
40.4 Sanitary Hot Water Production: Valves In Water Circuit ___ Fs01=1 (Air/Water,
Water/Water Unit)
40.4.1 - 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 domestic hot 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 domestic hot 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 domestic hot water valve 1 is switched off
• after a delay of FS28 seconds the domestic hot water circulation pump is switched off
Condenser fans are managed normally.
The defrost takes priority over the production of domestic hot water.
If the controller determines the need for a defrosting cycle during the production of domestic hot 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 domestic hot water valve 1 is switched off
• after a delay of FS28 seconds the domestic hot 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 domestic hot water, the compressors and any heating elements will be
switched on. After the FS11 delay from the end of the dripping phase, domestic hot water valve 1 is
switched on and, after the FS10 delay, domestic hot water valve 2 is switched off.
• If there is no need to produce domestic hot water, the controller continues with normal heat regulation.