90
Start-up - initial settings and functions
8.2.6 Zone thermostat settings
MENU > FOR SERVICEMAN > 6. ROOM THERMOSTAT
A zone thermostat can be used to manage the request to the unit.
L
NOTE
The HMI must still be connected to the unit in order to manage its internal parameters.
6.1 ROOM THERMOSTAT (standard: NO - settable: NO/MODE SET/ONE ZONE/DOUBLE ZONE)
Enables/disables the request to the unit from zone thermostats other than the HMI.
NO = no zone thermostat.
MODE SET = single zone system with double relay zone thermostat, for managing the request to the unit
and seasonal mode change (see type A connection in paragraph “7.10 Zone thermostat” on page 70).
ONE ZONE = single zone system with zone thermostat, for managing the request to the unit (see type B
connection in paragraph “7.10 Zone thermostat” on page 70). The seasonal mode change can be man-
aged by the HMI.
DOUBLE ZONE = double zone system, each with zone thermostat, for managing the request to the unit (see
type C connection in paragraph “7.10 Zone thermostat” on page 70). The seasonal mode change of both
zones can be managed by the HMI.
8.2.7 Additional heating source settings
MENU > FOR SERVICEMAN > 7. OTHER HEATING SOURCE
This section is used to adjust the parameters of an additional/backup electric heater on the system (IBH), a
boiler (AHS) or a solar thermal system.
L
NOTE
These sources are optional and can be supplied separately. Only one additional Heating source, either
electric heater or boiler, can be managed at the same time.
The connection and control of an electric heater in a system or boiler requires a dedicated water tempera-
ture probe, to be fitted on the downstream water supply line:
T1
IBHX
Fig. 89
The activation operating mode (in Heating, DHW production or both) must be selected with the dip-switches
on the board during installation.
Activation of the additional source is linked to the simultaneous presence of 3 conditions, each of which is
associated with a parameter:
• very low outdoor temperature : parameter T4_IBH_ON or T4_AHS_ON: the minimum outdoor air temper-
ature for heat pump operation only.
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