PENSOTTI PCH 50B-H Instruction Manual page 63

Diverter valve (see fig. 1)
Replacing the motor
Unscrew the fixing screws securing the transparent
cover of the diverter valve and remove the cover;
Unscrew the two motor fixing screws and disconnect the
wires;
Replace the motor and re-assemble the components
following the above procedure in reverse order;
Replace the motor and re-assemble the components
following the above procedure in reverse order;
Replacing the diverter valve
Close the shut-off valves and drain the central heating
circuit of the boiler;
Disconnect the joints securing the valve to the pipes;
Replace the valve
components following the above procedure in reverse
order;
Switch on the electricity, water and gas supplies and fill
the system with water. Check for any leaks from the
joints and bleed off any air from the circuit. Restart the
boiler.
Modulating circuit board (see fig. 2-3)
Open the control panel
(see 6.4 "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");
Replacement modulating circuit boards must be
programed to the correct parameters before
starting the appliance. Refer to section 5.1
parameters table.
Electric fan circuit board (see figs. 2-3)
Open the control panel (see 6.4 "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.
INSTALLATION INSTRUCTIONS
body and re-assemble
diverter valve motor
Fig. 1
the
Fig. 2
Fig. 3
electric fan circuit board
modulation circuit board
electric fan circuit board
modulation circuit board
60