INSTALLATION INSTRUCTIONS
TA05A140.A0307
45
6.6.9 Modulation circuit board
(see fig. 1-2)
•
Open the control panel
(see 6.3 “Accessing the
boiler”);
•
Disconnect all the connectors, remove the
regulating knobs, unscrew the four fixing screws and
remove the modulation circuit board;
•
Replace the circuit board and re-assemble the
components following the above procedure in
reverse order;
•
Switch on the electricity, water and gas supplies
and regulate the boiler
(see 5.3 “Gas data”)
;
The preset parameters of the printed circuit
board correspond to an instantaneous type
boiler fed by natural gas.
When replacing the modulation circuit board,
check the “Minimum heating flow rate” –
Parameter 19 and “Max Heating power” –
Parameter 20.
6.6.10 Electric fan circuit board
(see figs. 1-2)
•
Open the control panel
(see 6.3 “Accessing the
boiler”)
;
•
Disconnect the two connectors from the circuit
board, unscrew the two fixing screws and remove
the board;
•
Replace the circuit board and re-assemble the
components following the above procedure in
reverse order;
•
Switch on the electricity, water and gas supplies.
electric fan circuit board
modulation circuit board
Fig. 1
electric fan circuit board
modulation circuit board
Fig. 2
Summary of Contents for RK 25
Page 2: ......
