Setting The Boiler Control Function Modes; Adjustment Of Maximum Useful Output In C.h. Mode; Reignition Frequency Setting - Biasi M110.24SM/E Service Manual

Electronic control/ignition p.c.b.
9.5

Setting the boiler control function modes

It is possible to select the various boiler control function
modes by using the function selector knob A and the
D.h.w. temperature control knob B (Fig. 9.5).
During the function modes setting, the boiler does not
operate.
E B A C
Fig. 9.5
9.6
Adjustment of maximum useful output in
c.h. mode
The following procedure allows the output of the boiler
for c.h. to be limited to meet the system requirement.
Adjusting the maximum useful output in c.h. mode
does not prevent the boiler firing at maximum rate for
d.h.w. production.
1 Turn the boiler ON positioning the function selec-
tor knob A as indicated in Fig. 9.6.
E B
Fig. 9.6
2 Keep pressed the reset button C for about 10 sec-
onds until the lock ---out signal lamp D blinks.
3 The lamps E should give the indication as in
Fig. 9.7 (maximum c.h. useful output adjust-
ment). If not, press the reset button repeatedly to
obtain it.
Where:
Fig. 9.7
At this step it is possible to visualize the current setting
by keeping the reset button C pressed for more than 5
seconds. The lamps will flash a number of times corre-
sponding to the setting (Tab. 9.1).
4 To change the setting turn the knob B on a posi-
tion corresponding to the desired maximum use-
ful output (Tab. 9.1).
By turning the knob B, the lock ---out signal lamp
D blinks quickly (2 per seconds) indicating that
the setting has changed and must be memo-
rised.
18
D
A
C D
Lamp OFF
Lamp ON
Knob position Maximum useful output in c.h. mode
non condensing
kW (BTU/h)
M110.24SM/...
1 5,8 (19 788)
2 10,3 (35 142)
3 13,8 (47 083)
4 16,7 (56 977)
5 19,9 (67 895)
6 22,6 (77 107)
7 24,4 (83 248)
Tab. 9.1
5 To memorize the setting keep pressed the reset
button C for about 5 seconds until the lights E
briefly blinks simultaneously.
6 To reset the boiler to the normal operation turn it
OFF and ON by the function selector knob A. In
any case, the boiler automatically resets to its nor-
mal operation after 10 minutes.
9.7

Reignition frequency setting

It is possible to select the minimum time that must pass
between two ignitions of the burner in c.h. function
mode.
1 Turn the boiler ON positioning the function selec-
tor knob A as indicated in Fig. 9.8.
E B
Fig. 9.8
2 Keep pressed the reset button C for about 10 sec-
onds until the lock ---out signal lamp D blinks.
3 The lamps E should give the indication as in
Fig. 9.9 (reignition frequency). If not, press the
reset button repeatedly to obtain it.
Where:
Fig. 9.9
At this step it is possible to visualize the current setting
by keeping the reset button C pressed for more than 5
seconds. The lamps will flash a number of times corre-
sponding to the setting (Fig. 9.10).
4 To change the setting turn the knob B on a posi-
tion corresponding to the desired delay.
By turning the knob B, the lock ---out signal lamp
D blinks quickly (2 per seconds) indicating that
the setting has changed and must be memo-
rised.
M110.32SM/...
10,6 (36 165)
13,2 (45 036)
16,3 (55 612)
21,0 (71 648)
24,9 (84 954)
29,2 (99 625)
32,7 (111 566)
A C D
Lamp OFF
Lamp ON