Saunier Duval Thema CONDENS F 18 E SB Instructions For Use Installation And Servicing page 44

Legend
1 Automatic air vent
2 Pump retaining screw
3 Pump
4 Discharge pipe
5 Flow sensor retaining clip (*)
6 Flow sensor (*)
7 Flow sensor retaining clip (*)
8 Cold water filter retaining clip (*)
9 Cold water filter (*)
10 Filling tap (*)
11 Filling pipe retaining clip (*)
12 Filling pipe retaining clip (*)
13 Flow sensor connector (*)
14 "Foaming" filter retaining clip
15 "Foaming" filter
15.1.1 Pump
• Unscrew the pump's 4 retaining screws
(2).
• Remove the pump motor (3).
• Fit the new pump motor by repeating
the operations in reverse.
15.1.2 DHW exchanger
• Remove the two retaining screws (17)
accessible from the front of the boiler.
• Remove the DHW exchanger (25).
• Fit the new DHW exchanger by
repeating the operations in reverse.
• Check the assembly direction: the word
"TOP" printed on the exchanger edge
(25) must be positioned towards the
top.
15.1.3 Flow sensor
• Remove the retaining clip from the
filling pipe (12), and pivot the tap and
the filling pipe.
• Disconnect the connector (13) located
under the flow sensor.
• Remove the clips (5) and (7).
16 Discharge pipe retaining clip
17 DHW exchanger retaining screw (*)
18 Discharge valve
19 Heating safety valve
20 Heating safety valve retaining clip
21 Filling tap (*)
22 Heating pressure sensor retaining clip
23 Discharge retaining clip
24 Three-way valve
25 DHW exchanger (*)
26 Three-way valve connector
27 Heating pressure sensor connector
28 Heating pressure sensor
(*) Not required on SB models
• Unscrew the cold water inlet joint under
the boiler.
• Remove the flow sensor (6).
• Fit the new flow sensor by repeating the
operations in reverse.
15.1.4 Heating pressure sensor
• Remove the retaining clip (22) from the
heating pressure sensor.
• Disconnect the connector (28).
• Remove the heating pressure sensor
(29).
• Fit the new heating pressure sensor by
repeating the operations in reverse.
15.1.5 Heating safety valve
• Release the heating safety valve
retaining clip (20).
• Remove the heating safety valve (19).
• Fit the new heating safety valve by
repeating the operations in reverse.
15.1.6 Three-way valve
• Disconnect the 3-way valve connector
(26).