1. Disconnect the electrical connections “K” and silicone pipes “L” from their
connection points
(see fig. 1.20);
2. Remove screws “J” on the top of the sealed chamber (see fig. 1.21);
Use a No. 2 star tip screwdriver to remove the switch from the plate.
Fig. 1.21
Fig. 1.20
7
B029
1. Drain the boiler of water;
2. Release the two connection nuts “I” connecting the exchanger to the flow
and return pipes
(see fig. 1.18);
3. Pull it straight out (see fig. 1.19).
Removing the main heat
exchanger
Removing the air pressure switch
Fig. 1.18
I
Fig. 1.19
L
L
K
J
J
