97
Start-up - initial settings and functions
8.2.12 Special function settings
MENU > FOR SERVICEMAN > 12. SPECIAL FUNCTION
Special functions can be used during installation or maintenance to better manage or access the system,
e.g. on first start-up to run a radiant floor drying cycle or when the unit is restarted after being OFF for a long
period.
L
NOTE
In this mode, the keypad is disabled.
12.1 PREHEATING FOR FLOOR
The function can be useful when the distribution system consists of a radiant floor: if Heating mode is ac-
tivated on a floor that still contains a considerable amount of water, there is a risk that it will warp or crack.
To protect the floor, a preheating cycle must be carried out, during which the temperature of the water sup-
plied to the floor is gradually raised.
L
NOTE
If this is the first time the unit has been started up, before activating this function run the air vent function
(indicated in this paragraph), in order to avoid malfunctions or damage to the system.
The operating logic is shown in the following diagram:
Fig. 97
The parameters that can be set for this function are:
T1S (standard: 25 - settable: 25/35)
Defines the water supply setpoint temperature for the floor preheating function.
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