Thermal Control In The Mode - Biasi Riva Plus HE M296.24SR/C Service Manual

edge and ensure that no wiring is trapped beneath.
8 Insert the spindles in the control panel knobs until the notch A
(Figure 8.26) reaches the potentiometer edge. It is not neces-
sary to force them in the knob.
9 While tightening the screws that fix the Electronic control/igni-
tion p.c.b. on the control panel, keep the p.c.b. towards the
control panel fascia making sure of the contact between the
boiler reset button B and the tab C (Figure 8.26).
a
a
figure 8 .26
8 .12 thermal control in the
figure 8 .27
- 22 -
ElEctronic control/ignition p.c.b.
b
c
mode
Switch in the
YES
temperature higher than that
NO
Circulator off
Operates motorised valve
Ignition device off
attention
After installing the Electronic control/ignition p.c.b. :
10 Make sure the c.h. temperature (
adjustment knobs can move freely for the complete range.
If not, remove the spindle again as described at step 3, turn
the knob half a turn and re-insert the spindle.
11 Operate the boiler and close the gas inlet cock so that the
boiler goes into the safety lock-out state.
Verify the correct operation of the boiler reset button by
pressing and releasing it.
warning: after cleaning or replacement as detailed
above, if it deemed necessary to undertake a com-
bustion analysis, refer to the appropriate chapter
maintenance of the installation instructions manual .
function mode
Is primary circuit
selected?
Request for heat from
room thermostat?
Starts the circulator
Operates motorised valve
Supplies the ignition device
NO
YES
) and service ( )