Chaffoteaux & Maury Britony combi 80 Maintenance And Service Manual page 7

14. Flow switches
Drain boiler as in step 12. Disconnect the
electrical plug, turn the top cover anti-
clockwise, remove the O-ring and the
brass piston. Reassemble in reverse order.
15.3-Way valve
Drain boiler as in step 12. Remove the 3
clips on the 3 way valve. Remove the clip
on the exchanger flow pipe. Pull the pipe
down then pull it out of the 3 way valve.
Disconnect the plug from the motor.
Unscrew the nut on the pipe between the
connecting bracket and the 3 way valve
and pull it toward you. Rotate the 3 way
valve body anti-clockwise to unclip it from
the left hydraulic assembly.
16. Secondary heat exchanger
Drain both circuits of the boiler as in step
12. Unscrew the 2 fixing screws (D) and
remove the DHW exchanger from the front.
Prior to reassembly, check that the 4 gas-
kets are correctly positioned. The heat
exchanger is so designed that it cannot be
remounted incorrectly.
17. Main heat exchanger
Carry out steps 1 and 2 as above. Drain
boiler as in step 12. Remove the 2 clips (E)
located on return and flow pipes and pull
them downwards. Pull the main exchanger
toward you to remove. Reassemble in rever-
se order.
H
18. Pump
Drain boiler as in step 12. Pivot the electical
box downwards. Open the electrical box
cover removing the 2 screws. Remove the
pump plug from the power board and earth
plug from earth socket. Unscrew the nut (F)
of the return pipe from the volute. Remove
22. Spark generator
Carry out steps 1,2, and open the electrical
box cover as mentionned in step 5. Undo
the 4 screws of the electrical rear panel and
remove it. Unplug electrodes wires, remove
the ignitor connector from the PCB, remove
earth plug from earth socket. Hang out the
ignitor. Reassemble in reverse order.
the clip (G) on the pump volute and pull
pump toward you. Reassemble in reverse
order.
19. Pressure relief valve
The pressure relief valve can be serviced
from the front of the appliance. Drain the boi-
ler first, undo the retaining screw and pull
out the valve.Reassemble in reverse order.
20. Thermistors
Drain the boiler as step 12. Disconnect the
plug, remove the retaining clip pull the ther-
mistor out. Reassemble in reverse order.
38 = DHW thermistor
37 = Heating thermistor
38
37
21. Safety thermostat
Remove the casing as step 1 and hinge
down the electrical box as step 5.
Disconnect the 2 cables, pull out the sensor
with the clip (13). Reassemble in reverse
order.
23. Power board
Carry out steps 1, 2, and open the electrical
box cover as mentionned in step 5. Undo
the 4 screws of the electrical rear panel and
remove it. Unplug all cables from the PCB,
remove earth plug from earth socket. Hang
out the power board. Reassemble in rever-
se order.
24. Control board
Pull out plastic knob from the front panel
and proceed as step 23. Reassemble in
reverse order.
25. Expansion vessel
Remove the casing as step 1 and drain the
boiler as step 12 above. Unscrew the
connecting tails nuts and lift out the boiler
from the wall. Place it on a side on the floor.
Remove the expansion vessel bracket
retaining screws, disconnect the pipe from
the vessel and pull ti toward you.
Reassemble in reverse order.
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