Technical data

Ichill 200CX EVO rev 1.1 14/11/2013
Pag. 83 of 151
• after the DF07/2 delay the 4-way valve status is reversed and normal regulation is
restored.
If chilled water is required during the production of domestic hot water, operation is the same as in
the previous case.
41. SOLAR PANEL MANAGEMENT
Though appropriate configuration of FS55 and FS56 parameters is possible to use the solar panel in heating
or for sanitary hot water production.
The solar panel is managed through the valve and water pump control; their status depend from:
• solar panel temperature
• regulation probe (typically heating regulation probe or domestic hot water regulation probe); this
probe is defined in FS57 and FS58 parameters
41.1 Solar Panel In Sanitary Hot Water
• Compressors and solar panel in integration to domestic hot water (FS55=1):
If:
solar panel temperature – sanitary temperature > FS59 (Dt to enable solar panel in domestic hot
water)
the solar panel are enabled to work; sanitary probe is defined by FS57 parameter (it is possible to set
another probe, if needed).
Compressors are normally managed by sanitary hot water temperature and domestic hot water set point.
• if domestic hot water temperature < FS23-FS24, the valve of the solar panel is open and the water pump
is on
• if domestic hot water temperature > FS23, , the valve of the solar panel is close and the water pump is off
• Solar panel in heating mode (FS55=2)
If:
solar panel temperature – sanitary temperature > FS59 (Dt to enable solar panel in domestic hot
water)
the solar panel are enabled to work; sanitary probe is defined by FS57 parameter (it is possible to set
another probe, if needed).
At first compressors are not used for sanitary hot water.
It is possible to set a maximum time to use solar panel (FS61); when this time is elapsed and sanitary set
point is not reached, the solar panel are disabled and compressors are switched on.
The domestic hot water pump runs when solar panel are enabled.
In regulation, if
solar panel temperature – sanitary temperature < FS59
the solar panel are disabled and the hot domestic hot water is done by compressors.
Dt control is done only at the time of the request of sanitary hot water; at this moment, if Dt< FS59 the solar
panel are not used and compressors are used for heating.
41.2 Solar Panel In Heating Mode
• Solar panel in integration mode (FS56=1)
If:
solar panel temperature – heating temperature > FS60 (Dt to enable solar panel in heating)