Italtherm CITY BASIC - Main Board Settings Configuration

27
Main board sengs
The boiler is equipped with a Microprocessor modulaon board, featuring a 6-microswitch array
(SW1÷SW6) which allow to make personalizing acons for the boiler’s funconing as described in the
following table.
Disconnect the power supply before approaching the microswitches. Restore the power supply
only aer you have closed the back cover of the control panel.
Changes to microswitches status have no eect unl the boiler is electrically supplied (they are
red during the board startup, when the supply is connected).
S1
M15
M4
M2
M16
M6
M1
S1
28
27
26
25
24
23
22
21
39
38
7
8
9
10
1
2
3
4
5
6
68
69
70
71
72
73
74
75
SW1
SW6
ON
ON
SW 1
ON
OFF
SW 2
SW 3
SW 4
SW 5 SW 6
00014 00
SW1
OFF Natural gas Funconing.
ON or Funconing.
The factory seng depends on the gas type arranged in factory for the boiler. To change
the type of gas supply, it is necessary to follow the complete instrucons described in the
paragraph "Gas conversion" on page 28.
SW2
OFF In City Basic Boilers it must be OFF. .
SW3
It determines the delay of 3 minutes, before the new ignion of the burner aer the over-
coming of the heang set temperature.
OFF delay ON (for normal radiators systems). .
ON delay OFF (for fan coil systems).
SW4
OFF In City Basic Boilers it must be OFF. .
SW5
Pump funconing mode during heang working.
OFF
 for normal applicaons (with or without delay, see SW3).
.
ON
 (external pumps are present).
Remark: The pump will be anyway acvated in all other circumstances, e.g. during the DHW funconing,
for post-circulaon (if foreseen) or for an-freezing or an-lockout funcons.
SW6
OFF In City Basic Boilers it must be OFF. .