SATK22
23
Periodic Maintenance
The following checks must be carried out at least once very 12 months, in accordance with the prescriptions of standard EN 806-5.
Operations to be Performed
Force an actuators reset by switching the HIU power supply OFF and then ON
Visually check for the absence of leaks and/or anomalies
Check for possible active errors shown on the user interface
Test correct operation of the pump by closing the thermostat contact or forcing it to close
Clean the strainers: on the primary flow line, on the secondary return line, upstream of the domestic water flow meter.
Check for the absence of internal leakage through the modulating valves when none of the services are active
Check correct setting of the set points (DHW and heating). Unless explicitly requested by the user or for normative reasons, a DHW temperature
set point of 50˚C or lower is recommended
With the primary circuit at working temperature, check that the DHW flow rate at the correct temperature is sufficient
Summary of the technical parameters
Here follows a summary of the meaning and possible settings of the technical parameters:
Parameter
Meaning
Setting
t00
Not used
-
t01
Heating flow temperature control
0 = fixed set point
1 = fixed set point with RTL
2 = compensated on return temperature
3 = weather compensated
t02
DHW comfort mode
0 = pre-heating of the heat exchanger
1 = DHW re-circulation
t03
Maximum % opening of the heating modulating valve
From 50 to 100
t04
Maximum % opening of the DHW modulating valve
From 50 to 100
t05
Configuration of the closing logic of the auxiliary
microswitch
See page 19
t06
DWH temperature control
0 = fixed set point
1 = return temperature limits are frozen
t07
Some settings are frozen
0 = all temperature settings can be modified
1 = return temperature limits are frozen
t08
Anti-legionella
0 = disabled
1 = enabled between 3:00 to 3:30 am
t09
Duration of the DHW re-circulation cycle
1 unit = 10 seconds
