Table of Contents
Advertisement
3.19 SCREED HEATER FUNCTION
The indoor unit is equipped with a function to perform the ther-
mal shock on new radiant panel systems, as required by the appli-
cable standard.
Contact the manufacturer of the radiant panels for the
thermal shock characteristics and its correct execution.
To be able to activate the function there must be no re-
mote control connected, while in case of system divided
into zones it must be properly connected, both hydrauli-
cally and electrically.
The active zone pumps are those with ongoing requests, made via
the room thermostat input.
The function is activated from indoor unit in stand-by by pressing
and holding the buttons "Reset" and "Mode" for more than 5 se-
conds (Fig. 38).
The standard function lasts in total 7 days - 3 days at the lowest
temperature set and 4 days at the highest temperature set (Fig. 39).
Duration can be changed by changing the value of parameters
"T022", "T024".
After activating the function, the lower set (range 20 ÷ 45 °C de-
fault = 25 °C) and the higher set (range 25 ÷ 55 °C default = 45 °C)
appear in sequence.
The temperature is selected by means of the buttons "+" and "-" of
the system side (
) and confirmed by pressing the button
"Mode".
The display now shows the countdown of days alternated with the
current flow temperature, as well as the normal operating symbols
of the indoor unit.
66
In case of failure, the function is suspended and will resume when
normal operating conditions are reset from the point where it was
interrupted.
In case of power failure, the function is suspended.
When the time expires, the indoor unit automatically goes back to
"Stand-by" mode, the function can also be stopped by pressing the
button "Mode".
3.20 DEHUMIDIFICATION FUNCTION
Dehumidification can be performed according to two different
types of devices:
1) Humidistat;
2) Humidity sensor.
In the first case, the cooling mode temperature corresponds to:
- In the event of dehumidification request: maximum setpoint
set for the request zone;
- In the event of dehumidification and cooling request: setpoint
set for the request zone.
In the second case, the cooling mode temperature corresponds to:
- In the event of dehumidification request: maximum setpoint
set for the request zone;
- In the event of dehumidification request and cooling request:
setpoint set for the request zone, but limited by the calculated
dew temperature.
The dew temperature is only calculated for adjustments
above or equal to 15°C.
Key (Fig. 39):
(A) - Upper set
(B) - Lower set
(C) - Days
(A)
(B)
38
(C)
39
Advertisement
Table of Contents
