Pcb Interface Layout And Functions - Rinnai Infinity 20 External Operation And Installation Manual

3.1 PCB INTERFACE LAYOUT AND FUNCTIONS

Operation of the PCB interface
Communication interface socket
PB1 - Data transfer button:
activates data transfer when PCB is replaced
Data transfer LED
PB1
illumitates to show data transfer is in progress
PB2 PB2 - MODE button
activates programming mode of PCB
PB3 PB3 - MENU button
cycles through available modes
PB4 - VALUE button
PB4
cycles throug available values of each menu
PB5
PB5 - FORCED COMBUSTION MODE button
LED digital display
displays menu, values and forced combustion modes
S W1
S W2
DIP SWITCH (1-4): default setting is OFF position
S W3
S W4
ON
Push button settings
No. Menu Select
1 Gas type
2
Model setting
1
3 Max temperature
4
Warm water inlet
5
Auto reset
4
6 Temp. adjustment
7
Anti-frost
1
This setting is programmed in factory and cannot be changed.
1
2 This setting can modify the max temperature selection of the water heater; default setting is 55°C.
This setting can modify normal operation of water heater to keep heating water until outgoing temperature is
3
"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.
This setting can increase the hot water temperature delivery in case of heat losses due to lack of insulation of
5
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).
Factory default
DipSW
SW1 (OFF)
SW2 (OFF)
SW3 (OFF)
SW4 (OFF)
ON
32
A b
G31 G30
2024
55°C 65°C
2
+3°C +6°C
3
Off On
0°C +1°C
5
Yes
Sideways flue diverter
SW1 (ON)
SW2 (OFF)
SW3 (ON)
SW4 (OFF)
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.
Value Select
C d
G20 G230
60°C 50°C
+2°C +3°C
DipSW
ON
E F
42°C 40°C
High altitude installation
DipSW
SW1 (OFF)
SW2 (ON )
SW3 (OFF)
SW4 (ON )
(>900m & <1800m setting)
H
ON