Baxi MULTIFIT Fitting & Setting Instructions page 6

New System Heating
Return Sensor
Combi
br
br
br
br
w
b
Fig. 13
Fig. 14
6
© Baxi Heating UK Ltd 2010
Fig. 10
Fig. 11
System
Combi
3.0 Connection
3.1
7. Connect the appropriate new harness supplied to
position X400 on the PCB. On System models fit the new
Return Heating Sensor (Fig. 10).
8. Connect the harness terminals to the relevant boiler
components (see Figs. 6 to 9).
9. On Combi models connect the two brown wires on
the new harness to the terminal strip as shown (Fig. 11).
For System versions the white, blue and two brown wires
must be connected (Fig.12).
10. Route the wiring from the Outdoor Sensor to the
boiler, and using the cable grommet supplied (Fig. 13) pass
it through the hydraulic panel at the lower right.
11. Connect the Outdoor Sensor wiring to the the
terminals on the strip to which the brown wires are
Fig. 12
connected (Combi Fig. 14, System Fig. 15)
12. Refit the cover, resecure the facia and door panel and
commission the boiler.
NOTE: This instruction booklet and all other boiler
literature must be left with the user for safe keeping.
Fig. 15
Connecting the Sensor (continued)
System