Checking The Temperature - Biasi RINNOVA ADAPTIVE M300V.2025 SM Service Manual

1 2 3
11
Figure 9 .2
1 Connector - electric supply p.c.b.
2 Fuse F1 3,15 AF
3 Connector - 3 way diverter valve
4 Connector - pump
5 Connector - controller fan, flue temperature probe NTC,
safety thermostat and C.H. temperature probe NTC
6 Connector - D.H.W. temperature probe NTC, D.H.W. flow
switch and primary circuit pressure switch
7 Connector - gas valve
8 Connector - external temperature probe and remote control
(optional)
9 Connector - ignition / detection electrode
10 Connector - ground reference for ignition / detection elec-
trode
11 Connector - fan

9 .3 Checking the temperature

The Main electronic control/ignition p.c.b. makes it possible to
separately adjust the C.H. water flow temperature and D.H.W.
outlet temperature.
The temperature of the water is converted into an electric signal
by means of temperature probes.
The user, setting the desired temperature with the control panel
p.c.b. key or
If the power requested is lower than 40% of the maximum power
output then control is achieved by switching ON the burner at
minimum power, then switching OFF (ON/OFF function). If the
power requested is higher, then the burner is switched ON at
maximum power and will control by modulating to 40% of the
maximum power output.
During the C.H. operation (Figure 9.3), the signal coming from
the C.H. temperature probe is compared to the signal given by
the control panel through the adjustment made by the user (key
). The result of such a comparison operates the fan
speed thus regulating the gas flow rate and consequently chang-
ing the useful output of the boiler.
- 22 -
MAIN ELECTRONIC CONTROL/IGNITION P.C.B.
4 5 6
10
.
7
8
9
Figure 9 .3
When the boiler functions in D.H.W. (Figure 9.4), the signal com-
ing from the D.H.W. temperature probe is compared with the sig-
nal given by the control panel through the adjustment made by
the user (key
Figure 9 .4
).
90 °C