Caleffi 1522 - Manual (Page 4)

4
Display
The display (3) shows the text with the main operating information.
In the absence of control signals, after four minutes the display
reverts to the initial page.
General functions
Display
The regulator is equipped with a display to read and program the
control parameters, such as cut-in temperatures, function
activation delay times, thermal disinfection programs, solar system
control, etc. All the system’s functional parameters can be
configured to match individual requirements by means of the
“Select” knob and the three function keys.
Block protection function “Block Protect.”
When it is powered on, the regulator performs an initial check,
activating the valves and pumps to which it is connected. The
message “Block Protect.” appears on the display.
Pump and diverter valve anti-clog function
To prevent clogging of the pumps and diverter valves due to
prolonged stoppages, the regulator activates them for 60 seconds
after each period of 24 consecutive hours of disuse.
Frost protection
When the solid fuel generator flow temperature reaches a minimum
user-settable value, the regulator activates the primary side pump
to prevent the circuit from freezing.
Anti-legionella function (programs 5 and 8 only)
The regulator keeps the domestic water storage at the minimum set
temperature and raises the temperature in order to perform thermal
disinfection in accordance with customizable times.
Instantaneous domestic hot water production (programs 6 and
9 only)
The regulator manages the instantaneous domestic hot water
production by means of a second heat exchanger and, if
necessary, it sends the water to the boiler for thermal integration by
means of the (optional) SOLARINCAL kit (code 265359).
Overtemperature safety function
The regulator is equipped with a solid fuel generator
overtemperature monitoring function.
When the user-settable emergency temperature is reached on the
solid fuel generator, the regulator generates an alarm signal and
starts the pumps to dissipate the excess heat to the system or to an
emergency user service. This latter function can be activated by
means of a specific menu item. In this case, it is necessary to install
a diverter valve, driven by the regulator, to transfer the flow to the
emergency user service.
Probe control
Solid fuel generator flow temperature sensor error
When the working temperature range detected is below 0°C or
above 110°C, the following status is activated automatically: pumps
OFF, while the display shows the message “probe error” and the
LED flashes green and red alternately.
Select knob and function keys
LED
The LED (1) gives status information by means of a multicoloured
diode:
- flashing green:
regulator initialisation
- steady green:
regulator operating
- flashing green/red:
regulator operating with probe error or alarm
- flashing red:
regulator checking loop
- steady red:
regulator error.
Control description
1- Operating status indicator LED.
2- Mini DIN connector on front of panel for PC connection.
3- Menu display.
4- Select knob: selection of functions menu and parameter editing.
5- Function keys
5
- +
Optimiser 
1
2
3
4
Display and commands
Select knob
(4): can be rotated or pressed
Turn
the Select knob clockwise or
anticlockwise to select the options of the
function menu or to modify the values of the
various user-settable parameters.
Press
the Select knob to open the submenu
relative to the selected option.
Function keys
(5): can be pressed
Esc:
change the display of the selected menu
point and return to the previous menu level
Info:
displays brief information on the current
menu point
Set:
executes the change, confirming the
selected parameter value
- +
-
-
-
To set parameters use the document
“MENU LIST” code 28180 supplied in the pack