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MAINTENANCE AND CLEANING
Disassembling the heat exchanger
ƒ Remove the components as described in the chapter
"REMOVING THE COMBUSTION UNIT".
ƒ Disconnect the power supply by placing the main swi-
tch of the system on "off".
ƒ Empty the system.
ƒ Loosen the nuts of the 2 trains (A and B).
ƒ Take out the clips (C) so you can remove the 2 trains (A and B).
ƒ Take the 2 trains (A and B) out of the heat exchanger.
ƒ Take out the condensate discharge pipe (D).
ƒ Detach the flue gas probe connector.
ƒ Remove the screw (F) of the flue gas analysis outlet,
then remove the plug.
ƒ Remove the screw (G) that holds the rainguard in place.
ƒ Loosen the 4 screws (H) that hold the heat exchanger in its
seat.
ƒ Take out the heat exchanger.
ƒ Once the operations are finished, put back all the compo-
nents, following the above instructions in the reverse order.
ƒ Pay special attention when inserting the trains A and B;
use pliers at the base of the flaring to prevent an inlet
overstroke of the heat exchanger connections.
ƒ Turn the power and gas feeding to the boiler back on.
E
clamp
position
A
G
F
Disassembling the circulator
ƒ Disconnect the power supply by placing the main swi-
tch of the system on "off".
ƒ Empty the system.
ƒ Disassemble the right side panel (A) by loosening the 2
screws (B).
ƒ Loosen the nut and rotate the gas train (C).
ƒ Loosen the 4 screws (D) and take out the combustion
door with the fan and mixer (E).
ƒ Loosen the nuts holding the train (F) in place, then take
it out.
ƒ Loosen the nuts (G).
ƒ Take out the circulator (I) and the train (H).
9
clamp
D
position
B
H
C
H
C
46
Refit the circulator, making sure it is in the same po-
sition as before and does not interfere with the fan.
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