Removal Of The Flow Switch Group; Flow Limiter - Biasi GARDA M90F.24S Service Manual

13.5
Removal of the flow switch group and
d.h.w. circuit filter
Warning: isolate the boiler from the mains
electricity supply before removing any
covering or component.
1 Remove the front panel of the case and empty the
d.h.w. circuit.
2 Remove the flow switch sensor (see section
13.4).
3 Unscrew the body 2(Fig. 56) and extract the flow
switch group.
4 To remove the filter from the flow switch group
separate the filter 9 from the threaded ring
(Fig. 56) by levering it.
5 Reassemble the parts following the removing se-
quence in reverse order.
13.6

Flow limiter

The M90F.24S model is factory fitted with a 10 litre/min.
flow limiter.
D.h.w. flow switch, filter and flow limiter
If on the M90F.28S model the flow rate of the d.h.w. cir-
cuit is too high, it is possible to limit it by installing a flow
limiter. The following sizes are available:
Nominal flow rate (litres/min)
10
12
To install the threaded ring with the flow limiter:
1 Remove the flow switch group as explained in the
section 13.5.
2 Remove the filter from the flow switch group.
3 Unscrew the threaded ring 7 (Fig. 56) and re-
move it from the body 2.
4 Reassemble the group following the above se-
quence in reverse order.
Colour
Yellow
Brown
27