32
3.1 PCB INTERFACE LAYOUT AND FUNCTIONS
Operation of the PCB interface
To
enter into the PCB’s programming mode
press
PB2
until the LED digital display shows “1” (Gas type);
the current set value of “menu 1” will be displayed shortly
afterwards (the possible values of “menu 1” are: “A”, “b”,
“C” or “d”).
To
modify the value
of the menu press
PB4
: each press of
the button will select the next available value.
To
switch to a different menu
, press
PB3
: each press of
the button will select the next available menu.
To
exit from the programming mode
press
PB2
until the
LED display goes blank.
By pressing
PB5
the display shows “
L
” (forced low
combustion mode): by pressing
PB3
or
PB4
it is possible
to increase or reduce the min gas pressure.
Pressing
PB5
again the display shows “
H
” (forced high
combustion mode): by pressing
PB3
or
PB4
it is possible
to increase or reduce the max gas pressure.
Push button settings
No.
Menu Select
Value Select
A
b
C
d
E
F
H
1
Gas type
G31
G30
G20
G230
2
Model setting
1
2024
3
Max temperature
2
55°C
65°C
60°C
50°C
42°C
40°C
4
Warm water inlet
3
+3°C
+6°C
5
Auto reset
4
Off
On
6
Temp. adjustment
5
0°C
+1°C
+2°C
+3°C
7
Anti-frost
1
Yes
1
This setting is programmed in factory and cannot be changed.
2
This setting can modify the max temperature selection of the water heater; default setting is 55°C.
3
This setting can modify normal operation of water heater to keep heating water until outgoing temperature is
“Tset+6°C”; default setting is +3°C.
4
When water controller is switched on and the “auto reset” function is activated (b), the water heater automatically
switches on and auto sets at temperature selected before the balck-out happens.
5
This setting can increase the hot water temperature delivery in case of heat losses due to lack of insulation of
water pipes; default setting is 0°C: temperature set on water controller is the delivered temperature.
Dip switch SW(4p) settings
The switches of the control board are set to
OFF
(left position) as default setting.
When a sideways flue diverter is fitted the installer must set switches SW1 and SW3 to
ON
(right position).
When the appliance is installed in high altitude areas (>900m; <1800m) the installer must set switches
SW2 and SW4
to
ON
(right position).
1
2
3
4
Communication interface socket
PB1 - Data transfer button
:
activates data transfer when PCB is replaced
Data transfer LED
illumitates to show data transfer is in progress
PB2 - MODE button
activates programming mode of PCB
PB3 - MENU button
cycles through available modes
PB4 - VALUE button
cycles throug available values of each menu
PB5 - FORCED COMBUSTION MODE button
LED digital display
displays menu, values and forced combustion modes
DIP SWITCH (1-4)
: default setting is OFF position
PB1
PB2
PB3
PB4
PB5
S W1
S W2
S W3
S W4
ON
2
3
4
SW1
(
OFF
)
SW2
(
OFF
)
SW3
(
OFF
)
SW4
(
OFF
)
1
2
3
4
DipSW
Factory default
ON
SW1
(
OFF
)
SW2
(
ON
)
SW3
(
OFF
)
SW4
(
ON
)
ON
1
2
3
4
DipSW
High altitude installation
(>900m & <1800m setting)
SW1
(
ON
)
SW2
(
OFF
)
SW3
(
ON
)
SW4
(
OFF
)
1
2
3
4
DipSW
Sideways flue diverter
ON
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